diff --git a/docs/FRONTEND_MAINTAINABILITY.md b/docs/FRONTEND_MAINTAINABILITY.md
new file mode 100644
index 00000000..9b125ecc
--- /dev/null
+++ b/docs/FRONTEND_MAINTAINABILITY.md
@@ -0,0 +1,115 @@
+# Frontend maintainability conventions
+
+## Conditional rendering
+
+Use logical `&&` or the `when` prop on `Text` when JSX has only a rendered state and an empty
+state. Use a ternary only when both branches render meaningful alternatives.
+
+```tsx
+{
+  error && <Alert severity="error">{error.message}</Alert>;
+}
+
+<Text variant="description" when={Boolean(description)}>
+  {description}
+</Text>;
+```
+
+ESLint rejects `condition ? <Element /> : null`. This keeps one-sided conditions visually
+distinct from real either-or UI decisions.
+
+The left operand of `&&` must be entirely boolean. `&&` renders its left operand when it is falsy
+and non-boolean (notably `{count && <X />}` renders `0`), so a type-aware ESLint rule,
+`seahaven/no-non-boolean-jsx-and`, is enforced at `error` across the repository. It asks the
+TypeScript checker for the type of the left operand and reports unless every union constituent is
+boolean-like, so `boolean | undefined` and `string | null` fail just as `number` does. The rule
+fails closed: if type services are unavailable in a governed TSX file it reports rather than
+silently claiming safety. The `when` prop on `Text` is typed `boolean`, so TypeScript enforces the
+same constraint at that component boundary.
+
+Approved guard forms (choose by semantics, not as a blind codemod):
+
+- Presence-only values where falsy means "absent" — errors, optional strings shown only when set
+  (descriptions, notes, reasons), and optional objects (locations, detail records): coerce with
+  `Boolean(value)` (or `Boolean(a || b)` for a composite presence test) before `&&`.
+  `{Boolean(error) && <Alert />}` and `{Boolean(description) && <Text />}` are the canonical forms.
+- Values where `0` or `""` is meaningful, or where a non-null value must flow into a typed prop or
+  helper inside the branch: use an explicit nullish/range comparison so the operand is boolean and
+  TypeScript can still narrow. `{count > 0 && ...}`, `{value != null && ...}`, and
+  `{isEdit && id != null && <Panel vendorId={id} />}` keep `0`/`""` semantics and preserve
+  narrowing.
+- Element-slot props (`icon`, `action`, `actions`) are typed `ReactElement`, not `ReactNode`: the
+  slot holds one element (or fragment), and the render branch coerces with `Boolean(prop)`. Do not
+  widen these back to `ReactNode`, since a slot is never a meaningful `0`/`""`.
+
+Never weaken, disable, baseline, or add per-line exceptions to the rule. A new one-sided condition
+that needs a non-boolean operand must be rewritten into one of the approved forms above.
+
+## Typography and feedback
+
+Use `Text` from `@/components/ui/text` for headings, paragraphs, descriptions, labels, captions,
+code, and asynchronous feedback. It owns:
+
+- semantic HTML for each visual variant;
+- the display, body, and monospace font families;
+- default, muted, error, success, and warning tones;
+- accessible `alert` and `status` live regions for error and feedback text;
+- one-sided conditional text through `when`.
+
+The variant contract is non-overridable: `component`, `role`, and `aria-live` are omitted from
+`TextProps` (TypeScript blocks them) and the remaining props are spread before the variant-owned
+attributes so the variant element, tone, and live-region role always win at runtime. Use `as` to
+choose the rendered element and `tone` to choose the color; do not pass `component`, `role`, or
+`aria-live` directly.
+
+Live-region behavior:
+
+- `feedback` (polite `status`) keeps the region mounted and toggles its text content via `when`, so
+  the polite region exists before its content changes and is announced reliably. Mounting an
+  already-populated status node on demand is not announceable on most screen-reader/browser pairs.
+- `error` (assertive `alert`) mounts on demand (`when={false}` unmounts it). Alert-on-mount is the
+  expected error pattern, so the shipped `when={Boolean(error)}` usages are correct.
+
+ESLint rejects raw paragraph and heading elements. Existing MUI `Typography` usages remain valid,
+but new shared UI should prefer `Text` so semantics and design tokens do not drift.
+
+The `vp-error` CSS token is presentational chrome for vendor-portal error cards and may only appear
+on the `Text` component. ESLint flags any non-`Text` JSX element whose `className` is a static
+string literal containing `vp-error` (e.g. `<div className="vp-error">`, `<section
+className="vp-error extra">`); pair the error message with `variant="error"`. The rule enforces the
+static surface only. It cannot resolve dynamic or composed class values
+(`className={cn("vp-error", ...)}`, template literals with expressions, or expression-wrapped
+strings), so do not compose `vp-error` dynamically to bypass it — prefer `Text variant="error"`.
+
+## Forms and mutations
+
+Use the libraries already established in the application:
+
+- React Hook Form owns field registration, touched/dirty state, and client form lifecycle.
+- Zod owns form validation and inferred form value types.
+- TanStack Query owns server reads and mutations, including pending/error state, cache
+  invalidation, and retries where safe.
+
+Do not add TanStack Form alongside React Hook Form. It would create two form conventions without
+removing any current dependency. Reconsider only as a deliberate repository-wide migration with
+benchmarks, a codemod plan, and an approved deprecation path.
+
+File uploads are not ordinary form fields. Keep file selection and client validation in a focused
+component, and use a TanStack Query mutation for upload progress, errors, completion refresh, and
+retry state. Do not place upload orchestration in a route-sized page component.
+
+## Page state
+
+Pages should compose focused state components instead of accumulating unrelated booleans:
+
+- query loading, error, and empty states stay adjacent to the query result;
+- mutation pending/error state belongs to the component that initiated the mutation;
+- route pages coordinate sections and navigation;
+- reusable sections own their interaction details;
+- errors render inline with accessible feedback, with toasts reserved for cross-page outcomes.
+
+## Enforcement and rollout
+
+The lint rules are repository-wide and the initial violations were migrated in the same change.
+`npm run lint`, `npm run build`, and the `Text` behavior tests are required gates. Future
+maintainability rules must also land with a green migration rather than a warning-only backlog.
diff --git a/e2e/vendors/vendors.spec.ts b/e2e/vendors/vendors.spec.ts
new file mode 100644
index 00000000..29df8921
--- /dev/null
+++ b/e2e/vendors/vendors.spec.ts
@@ -0,0 +1,410 @@
+import { expect, test, type Page, type Route } from "@playwright/test";
+
+const TEST_USER = {
+  token: "vendor-e2e-token",
+  expiration: new Date(Date.now() + 60 * 60 * 1000).toISOString(),
+  email: "admin@seahavenind.com",
+  userRoles: "Admin",
+  phoneNumber: "5551234567",
+  fullname: "Vendor E2E Admin",
+  id: "1",
+};
+
+const activeVendors = [
+  {
+    Id: 1,
+    CompanyId: 101,
+    CompanyName: "Gateway Plumbing",
+    ContactName: "Adam Whyte",
+    Email: "dispatch@gateway.test",
+    Phone: "314-555-0198",
+    CompanyPhone: "314-555-0100",
+    Address: "1 Market St",
+    City: "St. Louis",
+    State: "MO",
+    Zip: "63101",
+    TradeSpecialties: "Plumbing, Backflow Preventers",
+    GoogleMapsUrl: "https://maps.google.com/gateway",
+    Notes: "Preferred after-hours vendor",
+    TotalJobs: 72,
+    IsActive: true,
+    PreferredContact: "Email",
+  },
+  {
+    Id: 2,
+    CompanyId: 102,
+    CompanyName: "Metro HVAC",
+    ContactName: "Maya Chen",
+    Email: "maya@metro.test",
+    Phone: "314-555-0112",
+    CompanyPhone: "314-555-0110",
+    Address: "2 Pine St",
+    City: "Clayton",
+    State: "MO",
+    Zip: "63105",
+    TradeSpecialties: "HVAC",
+    GoogleMapsUrl: "",
+    Notes: "",
+    TotalJobs: 18,
+    IsActive: true,
+  },
+];
+
+const inactiveVendors = [
+  {
+    ...activeVendors[0],
+    Id: 3,
+    CompanyName: "Drain Cleaning Bros",
+    ContactName: "Drew Banks",
+    TotalJobs: 151,
+    IsActive: false,
+  },
+];
+
+interface MockState {
+  listUrls: string[];
+  createdBody?: Record<string, unknown>;
+  updatedBody?: Record<string, unknown>;
+  deletedId?: string;
+}
+
+async function fulfillJson(route: Route, body: unknown, status = 200) {
+  await route.fulfill({ status, contentType: "application/json", body: JSON.stringify(body) });
+}
+
+async function captureVisual(page: Page, path: string) {
+  if (!process.env.VENDOR_VISUAL_CAPTURE) return;
+  await page.waitForTimeout(400);
+  await page.screenshot({ path, fullPage: true });
+}
+
+async function mockVendorApi(
+  page: Page,
+  options: { listError?: boolean; deactivationBlocked?: boolean; deleteConflict?: boolean } = {},
+) {
+  const state: MockState = { listUrls: [] };
+
+  await page.addInitScript((user) => localStorage.setItem("auth", JSON.stringify(user)), TEST_USER);
+
+  await page.route("**/api/DropdownOptions/ByCategory/Trade*", (route) =>
+    fulfillJson(route, {
+      data: [
+        { id: 1, value: "Plumbing" },
+        { id: 2, value: "HVAC" },
+      ],
+    }),
+  );
+  await page.route("**/api/Vendor/facets*", (route) =>
+    fulfillJson(route, {
+      data: {
+        companies: activeVendors.map((vendor) => ({
+          companyId: vendor.CompanyId,
+          name: vendor.CompanyName,
+          companyPhone: vendor.CompanyPhone,
+          email: vendor.Email,
+          address: vendor.Address,
+          city: vendor.City,
+          state: vendor.State,
+          zip: vendor.Zip,
+          googleMapsUrl: vendor.GoogleMapsUrl,
+        })),
+        trades: ["Plumbing", "Backflow Preventers", "HVAC"],
+        locations: [
+          { city: "St. Louis", state: "MO", label: "St. Louis, MO" },
+          { city: "Clayton", state: "MO", label: "Clayton, MO" },
+        ],
+        jobBuckets: [
+          { id: "under-50", label: "Under 50" },
+          { id: "50-99", label: "50–99" },
+          { id: "100-149", label: "100–149" },
+          { id: "150-plus", label: "150+" },
+        ],
+      },
+    }),
+  );
+  await page.route("**/api/Vendor/GetVendorList*", async (route) => {
+    const url = new URL(route.request().url());
+    state.listUrls.push(url.toString());
+    if (options.listError && url.searchParams.get("pageSize") !== "1") {
+      await fulfillJson(route, { message: "Vendor directory unavailable" }, 500);
+      return;
+    }
+
+    const isActive = url.searchParams.get("isActive") !== "false";
+    const source = isActive ? activeVendors : inactiveVendors;
+    const search = (url.searchParams.get("search") ?? "").toLowerCase();
+    const company = url.searchParams.get("companies[0]");
+    const filtered = source.filter(
+      (vendor) =>
+        (!search ||
+          `${vendor.CompanyName} ${vendor.ContactName} ${vendor.TradeSpecialties}`
+            .toLowerCase()
+            .includes(search)) &&
+        (!company || vendor.CompanyName === company),
+    );
+    const isCount = url.searchParams.get("pageSize") === "1";
+    await fulfillJson(route, {
+      Data: isCount ? filtered.slice(0, 1) : filtered,
+      TotalCount: filtered.length,
+      PageNumber: 1,
+      PageSize: Number(url.searchParams.get("pageSize") ?? 12),
+    });
+  });
+  await page.route(/\/api\/vendors\/\d+\/deactivation-impact$/, async (route) => {
+    const vendorId = Number(route.request().url().split("/").at(-2));
+    await fulfillJson(route, {
+      data: {
+        vendorId,
+        canDeactivate: !options.deactivationBlocked,
+        openWorkOrders: options.deactivationBlocked
+          ? [
+              {
+                workOrderId: 501,
+                workOrderNumber: "WO-501",
+                workOrderTitle: "Emergency boiler repair",
+                status: "Dispatched",
+                scheduledDate: "2026-07-24T14:00:00Z",
+                dispatchId: 801,
+              },
+            ]
+          : [],
+      },
+    });
+  });
+  await page.route(/\/api\/vendors\/\d+$/, async (route) => {
+    const id = route.request().url().split("/").pop() ?? "";
+    if (route.request().method() === "PUT") {
+      state.updatedBody = route.request().postDataJSON();
+      await fulfillJson(route, {
+        data: { ...activeVendors[0], ...state.updatedBody, Id: Number(id) },
+      });
+      return;
+    }
+    if (route.request().method() === "DELETE") {
+      if (options.deleteConflict) {
+        await fulfillJson(
+          route,
+          { message: "Vendor has open work orders and cannot be deactivated." },
+          409,
+        );
+        return;
+      }
+      state.deletedId = id;
+      await fulfillJson(route, { status: "200" });
+      return;
+    }
+    const vendor = [...activeVendors, ...inactiveVendors].find((item) => String(item.Id) === id);
+    await fulfillJson(route, { data: vendor });
+  });
+  await page.route(/\/api\/vendors\/?$/, async (route) => {
+    if (route.request().method() !== "POST") {
+      await route.fallback();
+      return;
+    }
+    state.createdBody = route.request().postDataJSON();
+    await fulfillJson(route, { data: { ...state.createdBody, id: 99, totalJobs: 0 } });
+  });
+
+  return state;
+}
+
+test.describe("Vendor directory prototype parity", () => {
+  test("covers status tabs, global counts, search, facets, table fields, and filtered footer", async ({
+    page,
+  }) => {
+    const state = await mockVendorApi(page);
+    await page.goto("/vendors");
+
+    await expect(page.getByRole("heading", { name: "Vendors / Technicians" })).toBeVisible();
+    await expect(page.getByText("3 technicians · 2 active")).toBeVisible();
+    await expect(page.getByRole("tab", { name: "Active (2)" })).toHaveAttribute(
+      "aria-selected",
+      "true",
+    );
+    for (const heading of [
+      "Company",
+      "Technician",
+      "Location",
+      "Trade",
+      "Phone",
+      "Email",
+      "Total Jobs",
+      "Status",
+    ]) {
+      await expect(page.getByRole("columnheader", { name: heading })).toBeVisible();
+    }
+    await expect(page.getByText("Gateway Plumbing")).toBeVisible();
+    await expect(page.getByText("+1")).toBeVisible();
+    await expect(page.getByText("2 active technicians · 2 active · 1 inactive")).toBeVisible();
+    await captureVisual(page, "/tmp/seahaven-vendor-implemented-list.png");
+
+    await page.getByPlaceholder("Search name, company, trade...").fill("metro");
+    await expect(page.getByText("Metro HVAC")).toBeVisible();
+    await expect(page.getByText(/1 active technician · filtered/)).toBeVisible();
+    expect(state.listUrls.some((url) => new URL(url).searchParams.get("search") === "metro")).toBe(
+      true,
+    );
+
+    await page.getByPlaceholder("Search name, company, trade...").clear();
+    await page.getByRole("button", { name: "Open vendor filters" }).click();
+    await expect(page.getByRole("heading", { name: "Filters" })).toBeVisible();
+    await captureVisual(page, "/tmp/seahaven-vendor-implemented-filters.png");
+    await page.getByRole("button", { name: /Company/ }).click();
+    await page.getByPlaceholder("All companies").click();
+    await page.getByRole("option", { name: /Gateway Plumbing/ }).click();
+    await page.getByRole("button", { name: "Apply" }).click();
+    await expect(page.getByText("Gateway Plumbing").first()).toBeVisible();
+    await expect(page.getByText(/1 active technician · filtered/)).toBeVisible();
+    expect(
+      state.listUrls.some(
+        (url) => new URL(url).searchParams.get("companies[0]") === "Gateway Plumbing",
+      ),
+    ).toBe(true);
+
+    await page.getByRole("button", { name: "Deactivate vendor" }).first().click();
+    await expect(page.getByRole("dialog", { name: "Deactivate Vendor" })).toContainText(
+      "history will be preserved",
+    );
+    await page.getByRole("button", { name: "Deactivate", exact: true }).click();
+    await expect.poll(() => state.deletedId).toBe("1");
+
+    await page.getByRole("tab", { name: "Inactive (1)" }).click();
+    await expect(page.getByText("No vendors match the current filters.")).toBeVisible();
+    await page.getByRole("button", { name: "Clear all" }).click();
+    await expect(page.getByText("Drain Cleaning Bros")).toBeVisible();
+    await expect(page.getByRole("button", { name: "Deactivate vendor" })).toHaveCount(0);
+  });
+
+  test("creates with company autofill, then views and edits every detail field", async ({
+    page,
+  }) => {
+    const state = await mockVendorApi(page);
+    await page.goto("/vendors");
+
+    await page.getByRole("button", { name: "+ Add Vendor" }).click();
+    await expect(page.getByText("Register a technician and their vendor company.")).toBeVisible();
+    await captureVisual(page, "/tmp/seahaven-vendor-implemented-add.png");
+    await expect(page.getByRole("button", { name: "Add Vendor" }).last()).toBeDisabled();
+
+    await page.getByLabel("Technician Name").fill("New Technician");
+    await page.getByRole("combobox", { name: "Company" }).click();
+    await page.getByRole("option", { name: "Gateway Plumbing" }).click();
+    await expect(page.getByLabel("Company Phone")).toHaveValue("314-555-0100");
+    await expect(page.getByRole("textbox", { name: "Email" })).toHaveValue("dispatch@gateway.test");
+    await expect(page.getByLabel("Address")).toHaveValue("1 Market St");
+    await expect(page.getByLabel("Google Maps URL")).toHaveValue("https://maps.google.com/gateway");
+    await page.getByRole("combobox", { name: "Add Trade" }).fill("Plumbing");
+    await page.getByRole("button", { name: "Add trade" }).click();
+    await page.getByRole("combobox", { name: "Add Trade" }).fill("HVAC");
+    await page.getByRole("button", { name: "Add trade" }).click();
+    await page.getByRole("button", { name: "Move HVAC up" }).click();
+    await page.getByLabel("Notes").fill("Created in browser E2E");
+    await page.getByRole("button", { name: "Text" }).click();
+    await expect(page.getByRole("button", { name: "Text" })).toHaveAttribute(
+      "aria-pressed",
+      "true",
+    );
+    await page.getByRole("button", { name: "Add Vendor" }).last().click();
+    await expect(page.getByRole("dialog", { name: "Add Vendor" })).toHaveCount(0);
+    expect(state.createdBody).toMatchObject({
+      companyName: "Gateway Plumbing",
+      companyId: 101,
+      contactName: "New Technician",
+      companyPhone: "(314) 555-0100",
+      preferredContact: "Text",
+      tradeSpecialties: "HVAC, Plumbing",
+      notes: "Created in browser E2E",
+    });
+
+    await page.getByRole("button", { name: "View vendor Gateway Plumbing" }).click();
+    const detailDrawer = page.locator(".MuiDrawer-paper").last();
+    await expect(detailDrawer.getByRole("heading", { name: "Gateway Plumbing" })).toBeVisible();
+    await expect(detailDrawer.getByText("Adam Whyte")).toBeVisible();
+    await expect(detailDrawer.getByText("72")).toBeVisible();
+    await expect(
+      detailDrawer.getByRole("link", { name: "Open in Google Maps" }).first(),
+    ).toHaveAttribute("target", "_blank");
+    await captureVisual(page, "/tmp/seahaven-vendor-implemented-detail.png");
+
+    await detailDrawer.getByRole("button", { name: "Edit" }).click();
+    await expect(detailDrawer.getByLabel("Total Jobs")).toHaveValue("72");
+    await expect(detailDrawer.getByLabel("Total Jobs")).toHaveAttribute("readonly");
+    await detailDrawer.getByLabel("Notes").fill("Updated in browser E2E");
+    await detailDrawer.getByRole("switch", { name: "Active" }).click();
+    await detailDrawer.getByRole("button", { name: "Save" }).click();
+    await expect.poll(() => state.updatedBody?.notes).toBe("Updated in browser E2E");
+    expect(state.updatedBody?.isActive).toBe(false);
+  });
+
+  test("supports keyboard dismissal and free-text company creation", async ({ page }) => {
+    const state = await mockVendorApi(page);
+    await page.goto("/vendors");
+
+    const addButton = page.getByRole("button", { name: "+ Add Vendor" });
+    await addButton.focus();
+    await page.keyboard.press("Enter");
+    await expect(page.getByRole("dialog", { name: /Add Vendor/ })).toBeVisible();
+    await page.keyboard.press("Escape");
+    await expect(page.getByRole("dialog", { name: /Add Vendor/ })).toHaveCount(0);
+    await expect(addButton).toBeFocused();
+
+    await addButton.click();
+    await expect(page.getByRole("button", { name: "Add Vendor" }).last()).toBeDisabled();
+    await page.getByLabel("Technician Name").fill("Independent Tech");
+    await page.getByRole("combobox", { name: "Company" }).fill("Independent Vendor LLC");
+    await page.getByRole("button", { name: "Add Vendor" }).last().click();
+
+    await expect.poll(() => state.createdBody?.companyName).toBe("Independent Vendor LLC");
+    expect(state.createdBody?.companyId).toBeNull();
+  });
+
+  test("blocks deactivation for linked work orders and preserves the vendor on a raced 409", async ({
+    page,
+  }) => {
+    const blockedState = await mockVendorApi(page, { deactivationBlocked: true });
+    await page.goto("/vendors");
+
+    await page.getByRole("button", { name: "Deactivate vendor" }).first().click();
+    const blockedDialog = page.getByRole("dialog", { name: "Deactivate Vendor" });
+    await expect(blockedDialog).toContainText("WO-501 — Emergency boiler repair");
+    await expect(blockedDialog.getByRole("button", { name: /^Deactivate$/ })).toBeDisabled();
+    expect(blockedState.deletedId).toBeUndefined();
+
+    await blockedDialog.getByRole("button", { name: "Cancel" }).click();
+    await page.unrouteAll({ behavior: "wait" });
+
+    const racedState = await mockVendorApi(page, { deleteConflict: true });
+    await page.reload();
+    await page.getByRole("button", { name: "Deactivate vendor" }).first().click();
+    await page
+      .getByRole("dialog", { name: "Deactivate Vendor" })
+      .getByRole("button", {
+        name: /^Deactivate$/,
+      })
+      .click();
+
+    await expect(page.getByRole("dialog", { name: "Deactivate Vendor" })).toContainText(
+      /open work orders|conflict/i,
+    );
+    expect(racedState.deletedId).toBeUndefined();
+    await expect(page.getByText("Gateway Plumbing").first()).toBeVisible();
+  });
+
+  test("shows API failure and keeps drawers usable at a mobile viewport", async ({ page }) => {
+    await page.setViewportSize({ width: 390, height: 844 });
+    await mockVendorApi(page, { listError: true });
+    await page.goto("/vendors");
+
+    await expect(page.getByRole("main").getByRole("alert")).toContainText(
+      /Vendor directory unavailable|failed|server error/i,
+      { timeout: 15_000 },
+    );
+    await page.getByRole("button", { name: "Open vendor filters" }).click();
+    const filterDrawer = page.locator(".MuiDrawer-paper").filter({ hasText: "Total Jobs" });
+    await expect(filterDrawer).toBeVisible();
+    const box = await filterDrawer.boundingBox();
+    expect(box?.width).toBeLessThanOrEqual(391);
+    await captureVisual(page, "/tmp/seahaven-vendor-implemented-mobile.png");
+    await page.getByRole("button", { name: "Close filters" }).click();
+  });
+});
diff --git a/e2e/work-orders/vendor-inline-editor.spec.ts b/e2e/work-orders/vendor-inline-editor.spec.ts
new file mode 100644
index 00000000..95639b66
--- /dev/null
+++ b/e2e/work-orders/vendor-inline-editor.spec.ts
@@ -0,0 +1,90 @@
+import { expect, test, type Route } from "@playwright/test";
+
+const TEST_USER = {
+  token: "work-order-vendor-e2e-token",
+  expiration: new Date(Date.now() + 60 * 60 * 1000).toISOString(),
+  email: "admin@seahavenind.com",
+  userRoles: "Admin",
+  phoneNumber: "5551234567",
+  fullname: "Work Order E2E Admin",
+  id: "1",
+};
+
+async function fulfillJson(route: Route, body: unknown, status = 200) {
+  await route.fulfill({ status, contentType: "application/json", body: JSON.stringify(body) });
+}
+
+test("edits only the vendor assigned to the current work order", async ({ page }) => {
+  let updateRequest: { url: string; body: Record<string, unknown> } | undefined;
+
+  await page.addInitScript((user) => localStorage.setItem("auth", JSON.stringify(user)), TEST_USER);
+  await page.route("**/api/WorkOrder/GetWorkorderById*", (route) =>
+    fulfillJson(route, {
+      Id: 501,
+      InternalWONumber: "WO-501",
+      WorkerOrderNumber: "CUSTOMER-501",
+      WorkerOrderTitle: "Emergency boiler repair",
+      Status: "Dispatched",
+      Comments: [],
+      AuditLog: [],
+      Dispatches: [
+        {
+          Id: 801,
+          DispatchNumber: "D-801",
+          VendorId: 7,
+          VendorName: "Gateway Plumbing",
+          VendorEmail: "dispatch@gateway.test",
+          Status: "Sent",
+          DispatchedAt: "2026-07-23T12:00:00Z",
+        },
+      ],
+    }),
+  );
+  await page.route("**/api/vendors/7/work-order-update", async (route) => {
+    updateRequest = {
+      url: route.request().url(),
+      body: route.request().postDataJSON() as Record<string, unknown>,
+    };
+    await fulfillJson(route, { data: { id: 7 } });
+  });
+  await page.route("**/api/vendors/7", (route) =>
+    fulfillJson(route, {
+      data: {
+        Id: 7,
+        CompanyName: "Gateway Plumbing",
+        ContactName: "Adam Whyte",
+        PreferredContact: "Email",
+        Phone: "3145550198",
+        Email: "dispatch@gateway.test",
+        Notes: "Preferred after-hours vendor",
+        IsActive: true,
+      },
+    }),
+  );
+  await page.route("**/api/User*", (route) => fulfillJson(route, { data: [] }));
+
+  await page.goto("/workorders/501");
+  await expect(page.getByRole("heading", { name: "Emergency boiler repair" })).toBeVisible();
+  await page.getByRole("button", { name: "Edit vendor" }).click();
+
+  await expect(page.getByRole("dialog", { name: "Edit assigned vendor" })).toBeVisible();
+  await expect(page.getByLabel("Technician name")).toHaveValue("Adam Whyte");
+  await page.getByLabel("Technician name").fill("Taylor Tech");
+  await page.getByLabel("Preferred contact").click();
+  await page.getByRole("option", { name: "Text" }).click();
+  await page.getByLabel("Phone").fill("3145550111");
+  await page.getByLabel("Email").fill("taylor@example.com");
+  await page.getByLabel("Notes").fill("Text before arrival");
+  await page.getByRole("button", { name: "Save" }).click();
+
+  await expect(page.getByRole("dialog", { name: "Edit assigned vendor" })).toBeHidden();
+  expect(updateRequest?.url).toMatch(/\/api\/vendors\/7\/work-order-update$/);
+  expect(updateRequest?.body).toEqual({
+    workOrderId: 501,
+    contactName: "Taylor Tech",
+    preferredContact: "Text",
+    phone: "(314) 555-0111",
+    email: "taylor@example.com",
+    notes: "Text before arrival",
+  });
+});
diff --git a/eslint-rules/no-non-boolean-jsx-and.js b/eslint-rules/no-non-boolean-jsx-and.js
new file mode 100644
index 00000000..10408424
--- /dev/null
+++ b/eslint-rules/no-non-boolean-jsx-and.js
@@ -0,0 +1,95 @@
+import ts from "typescript";
+
+/**
+ * Local type-aware rule: the left operand of `&&` in JSX must be entirely
+ * boolean.
+ *
+ * `{value && <Element />}` renders its left operand when it is falsy and
+ * non-boolean (notably `{count && <X />}` renders `0`), so the left operand
+ * must be `boolean` (or boolean literals) across the whole union. The rule
+ * asks the TypeScript checker for the type of the left operand and reports
+ * unless every union constituent is boolean-like.
+ *
+ * Type-aware by design: a selector that cannot see operand types would give
+ * false confidence rather than enforcement. If type services are unexpectedly
+ * unavailable in a governed TSX file, the rule fails closed (reports) instead
+ * of silently claiming the expression is safe.
+ */
+const booleanLikeFlags = ts.TypeFlags.Boolean | ts.TypeFlags.BooleanLiteral;
+
+function isBooleanLikeType(type) {
+  return (type.flags & booleanLikeFlags) !== 0;
+}
+
+function isEntirelyBoolean(type) {
+  if (type.isUnion()) {
+    return type.types.every((constituent) => isBooleanLikeType(constituent));
+  }
+  return isBooleanLikeType(type);
+}
+
+const transparentExpressionTypes = new Set([
+  "ChainExpression",
+  "ParenthesizedExpression",
+  "TSAsExpression",
+  "TSNonNullExpression",
+  "TSTypeAssertion",
+]);
+
+function isInRenderedPosition(node) {
+  let current = node;
+  while (current.parent) {
+    const parent = current.parent;
+    if (parent.type === "JSXExpressionContainer") {
+      return parent.parent?.type !== "JSXAttribute";
+    }
+    if (parent.type === "LogicalExpression" || transparentExpressionTypes.has(parent.type)) {
+      current = parent;
+      continue;
+    }
+    return false;
+  }
+  return false;
+}
+
+const rule = {
+  meta: {
+    type: "problem",
+    docs: {
+      description: "Require the left operand of `&&` in JSX to be entirely boolean",
+    },
+    schema: [],
+    messages: {
+      nonBooleanLeft:
+        'The left operand of `&&` in JSX must be boolean. Non-boolean falsy operands (e.g. `0`, `""`) render into the DOM; coerce with `Boolean(...)` or `!!` before `&&`.',
+      typeServicesUnavailable:
+        "Type-aware boolean-safety check is unavailable for this JSX expression. This file must be part of a TypeScript project with type information so the rule can enforce safely.",
+    },
+  },
+  create(context) {
+    const services = context.sourceCode?.parserServices ?? context.parserServices;
+
+    return {
+      LogicalExpression(node) {
+        if (node.operator !== "&&") {
+          return;
+        }
+        if (!isInRenderedPosition(node)) {
+          return;
+        }
+
+        if (!services || services.program === null) {
+          context.report({ node, messageId: "typeServicesUnavailable" });
+          return;
+        }
+
+        const leftType = services.getTypeAtLocation(node.left);
+        if (!isEntirelyBoolean(leftType)) {
+          context.report({ node: node.left, messageId: "nonBooleanLeft" });
+        }
+      },
+    };
+  },
+};
+
+export default rule;
diff --git a/eslint-rules/no-vp-error-outside-text.js b/eslint-rules/no-vp-error-outside-text.js
new file mode 100644
index 00000000..3498f5ea
--- /dev/null
+++ b/eslint-rules/no-vp-error-outside-text.js
@@ -0,0 +1,55 @@
+function containsVpErrorToken(node) {
+  if (!node || typeof node !== "object") {
+    return false;
+  }
+
+  if (node.type === "Literal" && typeof node.value === "string") {
+    return node.value.split(/\s+/u).includes("vp-error");
+  }
+
+  if (node.type === "TemplateElement") {
+    return node.value.raw.split(/\s+/u).includes("vp-error");
+  }
+
+  return Object.entries(node).some(([key, value]) => {
+    if (key === "parent") {
+      return false;
+    }
+    if (Array.isArray(value)) {
+      return value.some(containsVpErrorToken);
+    }
+    return containsVpErrorToken(value);
+  });
+}
+
+const rule = {
+  meta: {
+    type: "problem",
+    docs: {
+      description: "Require the Text component for legacy vp-error styling",
+    },
+    schema: [],
+    messages: {
+      useText:
+        'Use the Text component for the vp-error class; pair the error message with variant="error" so feedback stays accessible and consistent.',
+    },
+  },
+  create(context) {
+    return {
+      JSXAttribute(node) {
+        if (node.name?.name !== "className" || !containsVpErrorToken(node.value)) {
+          return;
+        }
+
+        const elementName = node.parent?.name;
+        if (elementName?.type === "JSXIdentifier" && elementName.name === "Text") {
+          return;
+        }
+
+        context.report({ node, messageId: "useText" });
+      },
+    };
+  },
+};
+
+export default rule;
diff --git a/eslint.config.js b/eslint.config.js
index 8d1f29c2..10c0aa46 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -5,6 +5,16 @@ import pluginReactRefresh from "eslint-plugin-react-refresh";
 import globals from "globals";
 import tseslint from "typescript-eslint";
 
+import noNonBooleanJsxAnd from "./eslint-rules/no-non-boolean-jsx-and.js";
+import noVpErrorOutsideText from "./eslint-rules/no-vp-error-outside-text.js";
+
+const localRules = {
+  rules: {
+    "no-non-boolean-jsx-and": noNonBooleanJsxAnd,
+    "no-vp-error-outside-text": noVpErrorOutsideText,
+  },
+};
+
 const legacyIgnores = [
   "src/pages/**",
   "src/app/store.js",
@@ -54,6 +64,7 @@ export default tseslint.config(
     plugins: {
       "react-hooks": pluginReactHooks,
       "react-refresh": pluginReactRefresh,
+      seahaven: localRules,
     },
     rules: {
       ...pluginReactHooks.configs.recommended.rules,
@@ -62,6 +73,23 @@ export default tseslint.config(
       "react-refresh/only-export-components": ["warn", { allowConstantExport: true }],
       "@typescript-eslint/no-unused-vars": ["error", { argsIgnorePattern: "^_" }],
       "@typescript-eslint/no-explicit-any": "warn",
+      "seahaven/no-non-boolean-jsx-and": "error",
+      "seahaven/no-vp-error-outside-text": "error",
+      "no-restricted-syntax": [
+        "error",
+        {
+          selector:
+            "JSXExpressionContainer > ConditionalExpression[alternate.type='Literal'][alternate.value=null]",
+          message:
+            "Use logical AND for one-sided JSX rendering instead of `condition ? element : null`.",
+        },
+        {
+          selector:
+            ":matches(JSXOpeningElement[name.name='p'], JSXOpeningElement[name.name='h1'], JSXOpeningElement[name.name='h2'], JSXOpeningElement[name.name='h3'], JSXOpeningElement[name.name='h4'], JSXOpeningElement[name.name='h5'], JSXOpeningElement[name.name='h6'])",
+          message:
+            "Use the shared Text component so typography semantics, family, tone, and feedback behavior stay consistent.",
+        },
+      ],
     },
   },
   {
diff --git a/package.json b/package.json
index ee9bb861..170958c4 100644
--- a/package.json
+++ b/package.json
@@ -11,8 +11,8 @@
     "test:watch": "vitest",
     "test:e2e": "playwright test",
     "test:e2e:ui": "playwright test --ui",
-    "lint": "eslint .",
-    "lint:fix": "eslint . --fix",
+    "lint": "eslint . --max-warnings=0",
+    "lint:fix": "eslint . --fix --max-warnings=0",
     "format": "prettier --write .",
     "format:check": "prettier --check .",
     "prepare": "husky"
diff --git a/src/api/api-paths.ts b/src/api/api-paths.ts
index 83a6b6aa..9b2f25eb 100644
--- a/src/api/api-paths.ts
+++ b/src/api/api-paths.ts
@@ -109,6 +109,8 @@ export const API_PATHS = {
     update: "Vendor/Update",
     delete: "Vendor/Delete",
     dropdown: "Vendor/Dropdown",
+    facets: "Vendor/facets",
+    deactivationImpact: "deactivation-impact",
   },
   calendar: {
     getEventsForCalendar: "Calendar/GetEventsForCalendar",
diff --git a/src/app/(auth)/_components/auth-card-header.tsx b/src/app/(auth)/_components/auth-card-header.tsx
index 795ca0a7..aaf95cf6 100644
--- a/src/app/(auth)/_components/auth-card-header.tsx
+++ b/src/app/(auth)/_components/auth-card-header.tsx
@@ -1,5 +1,6 @@
 import type { ComponentPropsWithoutRef } from "react";
 
+import { Text } from "@/components/ui/text";
 import { cn } from "@/lib/utils";
 
 export type AuthCardHeaderProps = ComponentPropsWithoutRef<"div"> & {
@@ -10,12 +11,17 @@ export type AuthCardHeaderProps = ComponentPropsWithoutRef<"div"> & {
 export function AuthCardHeader({ title, subtitle, className, ...props }: AuthCardHeaderProps) {
   return (
     <div className={cn(className)} {...props}>
-      <h2 className="m-0 text-center font-display font-bold text-foreground">{title}</h2>
-      {subtitle && (
-        <p className="mb-6! mt-1.5! text-center font-sans font-normal text-muted-foreground">
-          {subtitle}
-        </p>
-      )}
+      <Text variant="title" className="m-0 text-center font-bold text-foreground">
+        {title}
+      </Text>
+      <Text
+        variant="description"
+        tone="muted"
+        when={Boolean(subtitle)}
+        className="mb-6! mt-1.5! text-center font-normal"
+      >
+        {subtitle}
+      </Text>
     </div>
   );
 }
diff --git a/src/app/(auth)/_components/login-form.tsx b/src/app/(auth)/_components/login-form.tsx
index e06ba713..3e3d8456 100644
--- a/src/app/(auth)/_components/login-form.tsx
+++ b/src/app/(auth)/_components/login-form.tsx
@@ -75,7 +75,9 @@ export function LoginForm({
           disabled={isLoggingIn}
           error={Boolean(errors.password)}
         />
-        {loginError && <FormErrorMessage message="Invalid email or password. Please try again." />}
+        {Boolean(loginError) && (
+          <FormErrorMessage message="Invalid email or password. Please try again." />
+        )}
       </FormField>
 
       <Button
diff --git a/src/app/(auth)/login.tsx b/src/app/(auth)/login.tsx
index 9149bc8d..7d1c4c74 100644
--- a/src/app/(auth)/login.tsx
+++ b/src/app/(auth)/login.tsx
@@ -5,6 +5,7 @@ import { AuthCardHeader } from "@/app/(auth)/_components/auth-card-header";
 import { AuthPageShell } from "@/app/(auth)/_components/auth-page-shell";
 import { LoginForm } from "@/app/(auth)/_components/login-form";
 import { BrandLockup } from "@/components/common/brand-lockup";
+import { Text } from "@/components/ui/text";
 import { loginSchema, type LoginFormValues } from "@/domain/auth/schemas/login-schema";
 import { useAuthContext } from "@/providers/auth-context";
 
@@ -37,9 +38,13 @@ export default function LoginPage() {
         isLoggingIn={isLoggingIn}
         loginError={loginError}
       />
-      <p className="mt-5! block text-center font-sans text-(length:--text-xs) text-muted-foreground">
+      <Text
+        variant="caption"
+        tone="muted"
+        className="mt-5! block text-center text-(length:--text-xs)"
+      >
         Having trouble? Contact your administrator.
-      </p>
+      </Text>
     </AuthPageShell>
   );
 }
diff --git a/src/app/(protected)/accounts/_components/account-form.tsx b/src/app/(protected)/accounts/_components/account-form.tsx
index 25d48bd0..cbb8829a 100644
--- a/src/app/(protected)/accounts/_components/account-form.tsx
+++ b/src/app/(protected)/accounts/_components/account-form.tsx
@@ -110,7 +110,7 @@ export default function AccountFormPage() {
             </Button>
           </Stack>
 
-          {error && (
+          {Boolean(error) && (
             <Alert severity="error">
               {error instanceof Error ? error.message : "Failed to load account"}
             </Alert>
diff --git a/src/app/(protected)/accounts/index.tsx b/src/app/(protected)/accounts/index.tsx
index f4aea5da..7697c764 100644
--- a/src/app/(protected)/accounts/index.tsx
+++ b/src/app/(protected)/accounts/index.tsx
@@ -118,7 +118,7 @@ export default function AccountsListPage() {
           </Button>
         </Stack>
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load accounts"}
         </Alert>
diff --git a/src/app/(protected)/assets/_components/asset-form.tsx b/src/app/(protected)/assets/_components/asset-form.tsx
index d01ae284..513f1837 100644
--- a/src/app/(protected)/assets/_components/asset-form.tsx
+++ b/src/app/(protected)/assets/_components/asset-form.tsx
@@ -91,7 +91,7 @@ export default function AssetFormPage() {
         <Stack spacing={3}>
           <Typography variant="h5">{isEdit ? "Edit Asset" : "Create Asset"}</Typography>
 
-          {(error || optionsError) && (
+          {Boolean(error || optionsError) && (
             <Alert severity="error">
               {error instanceof Error
                 ? error.message
diff --git a/src/app/(protected)/assets/index.tsx b/src/app/(protected)/assets/index.tsx
index bea3dd35..e6d6451f 100644
--- a/src/app/(protected)/assets/index.tsx
+++ b/src/app/(protected)/assets/index.tsx
@@ -116,7 +116,7 @@ export default function AssetsListPage() {
           </Button>
         </Stack>
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load assets"}
         </Alert>
diff --git a/src/app/(protected)/calendar/_components/event-form.tsx b/src/app/(protected)/calendar/_components/event-form.tsx
index 183201d2..01134222 100644
--- a/src/app/(protected)/calendar/_components/event-form.tsx
+++ b/src/app/(protected)/calendar/_components/event-form.tsx
@@ -120,7 +120,7 @@ export default function EventFormPage() {
         <Stack spacing={3}>
           <Typography variant="h5">{isEdit ? "Edit Event" : "Create Event"}</Typography>
 
-          {error && <Alert severity="error">Failed to load event</Alert>}
+          {Boolean(error) && <Alert severity="error">Failed to load event</Alert>}
 
           <Box component="form" onSubmit={handleSubmit(onSubmit)}>
             <Stack spacing={3}>
diff --git a/src/app/(protected)/contacts/_components/contact-form.tsx b/src/app/(protected)/contacts/_components/contact-form.tsx
index f2fefc39..401265d6 100644
--- a/src/app/(protected)/contacts/_components/contact-form.tsx
+++ b/src/app/(protected)/contacts/_components/contact-form.tsx
@@ -127,7 +127,7 @@ export default function ContactFormPage() {
         <Stack spacing={4}>
           <Typography variant="h5">{isEdit ? "Edit Contact" : "Create Contact"}</Typography>
 
-          {error && (
+          {Boolean(error) && (
             <Alert severity="error">
               {error instanceof Error ? error.message : "Failed to load contact"}
             </Alert>
diff --git a/src/app/(protected)/contacts/index.tsx b/src/app/(protected)/contacts/index.tsx
index 54591c7e..e910c8f4 100644
--- a/src/app/(protected)/contacts/index.tsx
+++ b/src/app/(protected)/contacts/index.tsx
@@ -103,7 +103,7 @@ export default function ContactsListPage() {
           </Button>
         </Stack>
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load contacts"}
         </Alert>
diff --git a/src/app/(protected)/dashboard.tsx b/src/app/(protected)/dashboard.tsx
index 20be5454..e1af6bf9 100644
--- a/src/app/(protected)/dashboard.tsx
+++ b/src/app/(protected)/dashboard.tsx
@@ -70,7 +70,7 @@ function KpiCard({ title, description, value, icon, color, onClick, loading }: K
               {loading ? "..." : typeof value === "number" ? value.toLocaleString() : value}
             </Typography>
           )}
-          {description && (
+          {Boolean(description) && (
             <Typography
               variant="body2"
               sx={{
@@ -106,7 +106,7 @@ export default function DashboardPage() {
         </Typography>
         {isFetching && !isLoading && <CircularProgress size={16} />}
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load dashboard stats"}
         </Alert>
diff --git a/src/app/(protected)/employees/_components/employee-form.tsx b/src/app/(protected)/employees/_components/employee-form.tsx
index 78ed8bc1..6d5413a8 100644
--- a/src/app/(protected)/employees/_components/employee-form.tsx
+++ b/src/app/(protected)/employees/_components/employee-form.tsx
@@ -83,7 +83,7 @@ function SelectField({
               </MenuItem>
             ))}
           </Select>
-          {helperText && (
+          {Boolean(helperText) && (
             <Typography variant="caption" color="error" className="mt-1">
               {helperText}
             </Typography>
@@ -193,7 +193,7 @@ export default function EmployeeFormPage() {
             </Button>
           </Stack>
 
-          {error && (
+          {Boolean(error) && (
             <Alert severity="error">
               {error instanceof Error ? error.message : "Failed to load employee"}
             </Alert>
diff --git a/src/app/(protected)/employees/index.tsx b/src/app/(protected)/employees/index.tsx
index b570dbe3..ed56887b 100644
--- a/src/app/(protected)/employees/index.tsx
+++ b/src/app/(protected)/employees/index.tsx
@@ -124,7 +124,7 @@ export default function EmployeesListPage() {
           </Button>
         </Stack>
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load employees"}
         </Alert>
diff --git a/src/app/(protected)/followups/_components/follow-up-form.tsx b/src/app/(protected)/followups/_components/follow-up-form.tsx
index 603dd3f1..d7a6a86c 100644
--- a/src/app/(protected)/followups/_components/follow-up-form.tsx
+++ b/src/app/(protected)/followups/_components/follow-up-form.tsx
@@ -102,7 +102,7 @@ export default function FollowUpFormPage() {
         <Stack spacing={4}>
           <Typography variant="h5">{isEdit ? "Edit Follow-up" : "Create Follow-up"}</Typography>
 
-          {error && (
+          {Boolean(error) && (
             <Alert severity="error">
               {error instanceof Error ? error.message : "Failed to load follow-up"}
             </Alert>
diff --git a/src/app/(protected)/followups/index.tsx b/src/app/(protected)/followups/index.tsx
index 69b42a59..30980fc0 100644
--- a/src/app/(protected)/followups/index.tsx
+++ b/src/app/(protected)/followups/index.tsx
@@ -129,7 +129,7 @@ export default function FollowUpsListPage() {
           </Button>
         </Stack>
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load follow-ups"}
         </Alert>
diff --git a/src/app/(protected)/index.tsx b/src/app/(protected)/index.tsx
index 20be5454..e1af6bf9 100644
--- a/src/app/(protected)/index.tsx
+++ b/src/app/(protected)/index.tsx
@@ -70,7 +70,7 @@ function KpiCard({ title, description, value, icon, color, onClick, loading }: K
               {loading ? "..." : typeof value === "number" ? value.toLocaleString() : value}
             </Typography>
           )}
-          {description && (
+          {Boolean(description) && (
             <Typography
               variant="body2"
               sx={{
@@ -106,7 +106,7 @@ export default function DashboardPage() {
         </Typography>
         {isFetching && !isLoading && <CircularProgress size={16} />}
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load dashboard stats"}
         </Alert>
diff --git a/src/app/(protected)/locations/_components/location-form.tsx b/src/app/(protected)/locations/_components/location-form.tsx
index 79ef1acc..990fc75d 100644
--- a/src/app/(protected)/locations/_components/location-form.tsx
+++ b/src/app/(protected)/locations/_components/location-form.tsx
@@ -114,7 +114,7 @@ export default function LocationFormPage() {
             </Button>
           </Stack>
 
-          {error && (
+          {Boolean(error) && (
             <Alert severity="error">
               {error instanceof Error ? error.message : "Failed to load location"}
             </Alert>
diff --git a/src/app/(protected)/locations/index.tsx b/src/app/(protected)/locations/index.tsx
index df239574..097db2c8 100644
--- a/src/app/(protected)/locations/index.tsx
+++ b/src/app/(protected)/locations/index.tsx
@@ -118,7 +118,7 @@ export default function LocationsListPage() {
           </Button>
         </Stack>
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load locations"}
         </Alert>
diff --git a/src/app/(protected)/pmschedules/_components/pm-schedule-form.tsx b/src/app/(protected)/pmschedules/_components/pm-schedule-form.tsx
index d3b82f15..0253a149 100644
--- a/src/app/(protected)/pmschedules/_components/pm-schedule-form.tsx
+++ b/src/app/(protected)/pmschedules/_components/pm-schedule-form.tsx
@@ -80,8 +80,8 @@ export default function PmScheduleFormPage() {
         <Stack spacing={3}>
           <Typography variant="h5">{isEdit ? "Edit PM Schedule" : "Create PM Schedule"}</Typography>
 
-          {error && <Alert severity="error">Failed to load PM schedule</Alert>}
-          {optionsError && (
+          {Boolean(error) && <Alert severity="error">Failed to load PM schedule</Alert>}
+          {Boolean(optionsError) && (
             <Alert severity="error">
               {optionsError instanceof Error ? optionsError.message : "Failed to load form options"}
             </Alert>
diff --git a/src/app/(protected)/pmschedules/index.tsx b/src/app/(protected)/pmschedules/index.tsx
index 4517d4ed..826381e7 100644
--- a/src/app/(protected)/pmschedules/index.tsx
+++ b/src/app/(protected)/pmschedules/index.tsx
@@ -122,7 +122,7 @@ export default function PmSchedulesListPage() {
           )}
         </Stack>
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load PM schedules"}
         </Alert>
diff --git a/src/app/(protected)/settings/dropdowns.tsx b/src/app/(protected)/settings/dropdowns.tsx
index 4e2c0df7..e4aef562 100644
--- a/src/app/(protected)/settings/dropdowns.tsx
+++ b/src/app/(protected)/settings/dropdowns.tsx
@@ -158,7 +158,7 @@ export default function DropdownOptionsPage() {
               alignItems: "stretch",
             }}
           >
-            {parentCategory && (
+            {Boolean(parentCategory) && (
               <FormControl size="small" className="min-w-[160px]">
                 <InputLabel id="parent-trade-label">Parent Trade</InputLabel>
                 <Select
@@ -201,7 +201,7 @@ export default function DropdownOptionsPage() {
             </Button>
           </Stack>
 
-          {error && (
+          {Boolean(error) && (
             <Alert severity="error">
               {error instanceof Error ? error.message : "Failed to load options"}
             </Alert>
@@ -262,7 +262,7 @@ export default function DropdownOptionsPage() {
                       <Typography variant="body2" className="truncate">
                         {item.value}
                       </Typography>
-                      {item.parentValue && (
+                      {Boolean(item.parentValue) && (
                         <Chip size="small" label={item.parentValue} variant="outlined" />
                       )}
                     </Stack>
diff --git a/src/app/(protected)/settings/task-templates.tsx b/src/app/(protected)/settings/task-templates.tsx
index 9bb59f01..d9888509 100644
--- a/src/app/(protected)/settings/task-templates.tsx
+++ b/src/app/(protected)/settings/task-templates.tsx
@@ -126,7 +126,7 @@ export default function TaskTemplatesPage() {
           Create reusable checklists for work order dispatches
         </Typography>
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error" className="mb-4">
           {error instanceof Error ? error.message : "Failed to load templates"}
         </Alert>
diff --git a/src/app/(protected)/uplifts/index.tsx b/src/app/(protected)/uplifts/index.tsx
index 7e4f20e3..e78ac07f 100644
--- a/src/app/(protected)/uplifts/index.tsx
+++ b/src/app/(protected)/uplifts/index.tsx
@@ -157,7 +157,7 @@ export default function UpliftQueuePage() {
           </FormControl>
         </Stack>
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load uplift queue"}
         </Alert>
@@ -215,7 +215,7 @@ export default function UpliftQueuePage() {
                   <TableCell>{row.requestedAt ? formatDateTime(row.requestedAt) : ""}</TableCell>
                   <TableCell>
                     <Stack direction="row" spacing={1}>
-                      {row.workOrderId && (
+                      {Boolean(row.workOrderId) && (
                         <Button
                           size="small"
                           variant="outlined"
diff --git a/src/app/(protected)/vendor-pos/[id].tsx b/src/app/(protected)/vendor-pos/[id].tsx
index 3fe4d7e1..684dc0c7 100644
--- a/src/app/(protected)/vendor-pos/[id].tsx
+++ b/src/app/(protected)/vendor-pos/[id].tsx
@@ -127,7 +127,7 @@ export default function VendorPoViewPage() {
             Dispatch {dispatch.dispatchNumber || "—"}
           </Typography>
           <Chip size="small" label={dispatch.status || "—"} />
-          {vendor?.companyName && (
+          {vendor != null && Boolean(vendor.companyName) && (
             <Typography variant="body2" color="text.secondary">
               · {vendor.companyName}
             </Typography>
@@ -177,7 +177,7 @@ export default function VendorPoViewPage() {
             <InfoRow label="Verified">{formatDateTime(dispatch.verifiedAt)}</InfoRow>
             <InfoRow label="Email sent">{dispatch.emailSent ? "Yes" : "No"}</InfoRow>
           </Box>
-          {dispatch.description && (
+          {Boolean(dispatch.description) && (
             <Box className="mt-3">
               <Typography variant="caption" color="text.secondary">
                 Description
@@ -189,7 +189,7 @@ export default function VendorPoViewPage() {
           )}
         </Paper>
 
-        {dispatch.primaryLocation && (
+        {dispatch.primaryLocation != null && (
           <Paper variant="outlined" className="p-4">
             <Typography variant="subtitle1" className="mb-3 font-semibold">
               Site
@@ -277,7 +277,7 @@ export default function VendorPoViewPage() {
                     </Typography>
                     <Chip size="small" label={u.status} />
                   </Stack>
-                  {u.vendorReason && (
+                  {Boolean(u.vendorReason) && (
                     <Typography variant="body2" className="mt-1">
                       <strong>Reason:</strong> {u.vendorReason}
                     </Typography>
diff --git a/src/app/(protected)/vendor-pos/index.tsx b/src/app/(protected)/vendor-pos/index.tsx
index 7667b269..81d07243 100644
--- a/src/app/(protected)/vendor-pos/index.tsx
+++ b/src/app/(protected)/vendor-pos/index.tsx
@@ -199,7 +199,7 @@ export default function VendorPosListPage() {
           Clear filters
         </Button>
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load vendor POs"}
         </Alert>
diff --git a/src/app/(protected)/vendors/_components/vendor-create-modal.tsx b/src/app/(protected)/vendors/_components/vendor-create-modal.tsx
new file mode 100644
index 00000000..e48a8aa7
--- /dev/null
+++ b/src/app/(protected)/vendors/_components/vendor-create-modal.tsx
@@ -0,0 +1,155 @@
+import { useEffect, useState } from "react";
+import { useForm, useWatch } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+import {
+  Alert,
+  Box,
+  Button,
+  CircularProgress,
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogTitle,
+  Stack,
+  Typography,
+} from "@mui/material";
+import { VendorFormFields } from "./vendor-form-fields";
+import { vendorSchema, type VendorFormValues } from "@/domain/vendors/schemas/vendor-schema";
+import { useCreateVendor } from "@/domain/vendors/use-cases/use-create-vendor";
+import { useVendorFacets } from "@/domain/vendors/use-cases/use-vendor-facets";
+import type { VendorFacetCompany } from "@/domain/vendors/types/vendor";
+
+interface VendorCreateModalProps {
+  open: boolean;
+  onClose: () => void;
+  tradeOptions: string[];
+}
+
+const defaultValues: VendorFormValues = {
+  companyName: "",
+  contactName: "",
+  email: "",
+  phone: "",
+  companyPhone: "",
+  googleMapsUrl: "",
+  notes: "",
+  totalJobs: 0,
+  address: "",
+  city: "",
+  state: "",
+  zip: "",
+  tradeSpecialties: "",
+  isActive: true,
+  companyId: null,
+  preferredContact: "Phone",
+};
+
+export function VendorCreateModal({ open, onClose, tradeOptions }: VendorCreateModalProps) {
+  const { data: facets, isLoading: isLoadingFacets, error: facetsError } = useVendorFacets();
+  const createVendor = useCreateVendor();
+  const [submitError, setSubmitError] = useState<string | null>(null);
+
+  const {
+    control,
+    handleSubmit,
+    reset,
+    setValue,
+    trigger,
+    formState: { errors },
+  } = useForm<VendorFormValues>({
+    resolver: zodResolver(vendorSchema),
+    defaultValues,
+    mode: "onChange",
+  });
+  const currentValues = useWatch({ control });
+  const isFormValid = vendorSchema.safeParse(currentValues).success;
+
+  useEffect(() => {
+    if (open) {
+      reset(defaultValues);
+      setSubmitError(null);
+    }
+  }, [open, reset]);
+
+  const onCompanySelected = (company: VendorFacetCompany | null) => {
+    if (!company) return;
+    const options = { shouldDirty: true, shouldValidate: true } as const;
+    setValue("companyId", company.companyId, options);
+    setValue("companyPhone", company.companyPhone, options);
+    setValue("email", company.email, options);
+    setValue("address", company.address, options);
+    setValue("city", company.city, options);
+    setValue("state", company.state, options);
+    setValue("zip", company.zip, options);
+    setValue("googleMapsUrl", company.googleMapsUrl, options);
+    void trigger();
+  };
+
+  const onSubmit = (values: VendorFormValues) => {
+    setSubmitError(null);
+    createVendor.mutate(values, {
+      onSuccess: () => {
+        onClose();
+      },
+      onError: (error: Error) => {
+        setSubmitError(error.message || "Failed to create vendor");
+      },
+    });
+  };
+
+  const companies = facets?.companies ?? [];
+
+  return (
+    <Dialog
+      open={open}
+      onClose={createVendor.isPending ? undefined : onClose}
+      fullWidth
+      maxWidth="sm"
+      aria-labelledby="vendor-create-dialog-title"
+      slotProps={{ paper: { role: "dialog" } }}
+    >
+      <DialogTitle id="vendor-create-dialog-title">
+        Add Vendor
+        <Typography variant="body2" sx={{ color: "text.secondary", mt: 0.5 }}>
+          Register a technician and their vendor company.
+        </Typography>
+      </DialogTitle>
+      <DialogContent>
+        <Stack spacing={2} className="mt-1">
+          {Boolean(facetsError) && (
+            <Alert severity="warning">
+              Company autocomplete unavailable. You can still type a company manually.
+            </Alert>
+          )}
+          {Boolean(submitError) && <Alert severity="error">{submitError}</Alert>}
+          {isLoadingFacets ? (
+            <CircularProgress size={24} />
+          ) : (
+            <Box>
+              <VendorFormFields
+                control={control}
+                errors={errors}
+                companies={companies}
+                tradeOptions={tradeOptions}
+                onCompanySelected={onCompanySelected}
+              />
+            </Box>
+          )}
+        </Stack>
+      </DialogContent>
+      <DialogActions>
+        <Button onClick={onClose} disabled={createVendor.isPending}>
+          Cancel
+        </Button>
+        <Button
+          color="primary"
+          variant="contained"
+          onClick={handleSubmit(onSubmit)}
+          disabled={createVendor.isPending || !isFormValid}
+        >
+          {createVendor.isPending ? "Saving..." : "Add Vendor"}
+        </Button>
+      </DialogActions>
+    </Dialog>
+  );
+}
diff --git a/src/app/(protected)/vendors/_components/vendor-detail-drawer.tsx b/src/app/(protected)/vendors/_components/vendor-detail-drawer.tsx
new file mode 100644
index 00000000..9dcd5eed
--- /dev/null
+++ b/src/app/(protected)/vendors/_components/vendor-detail-drawer.tsx
@@ -0,0 +1,486 @@
+import { useEffect, useMemo, useState, type ReactNode } from "react";
+import { useForm, useWatch, Controller } from "react-hook-form";
+import { zodResolver } from "@hookform/resolvers/zod";
+import CloseIcon from "@mui/icons-material/Close";
+import EditOutlinedIcon from "@mui/icons-material/EditOutlined";
+import LaunchIcon from "@mui/icons-material/Launch";
+import {
+  Alert,
+  Box,
+  Button,
+  Chip,
+  CircularProgress,
+  Drawer,
+  FormControlLabel,
+  IconButton,
+  Link,
+  Stack,
+  Switch,
+  Tooltip,
+  Typography,
+} from "@mui/material";
+import { VendorFormFields } from "./vendor-form-fields";
+import { vendorSchema, type VendorFormValues } from "@/domain/vendors/schemas/vendor-schema";
+import { useUpdateVendor } from "@/domain/vendors/use-cases/use-update-vendor";
+import { useVendorDetail } from "@/domain/vendors/use-cases/use-vendor-detail";
+import { useVendorFacets } from "@/domain/vendors/use-cases/use-vendor-facets";
+import type { Vendor, VendorListItem, VendorPreferredContact } from "@/domain/vendors/types/vendor";
+
+const DRAWER_WIDTH = 420;
+
+const PREFERRED_CONTACT_LABELS: Record<VendorPreferredContact, string> = {
+  Phone: "Phone",
+  Email: "Email",
+  Text: "Text Message",
+};
+
+function getInitials(name: string): string {
+  const parts = name.trim().split(/\s+/).filter(Boolean);
+  if (parts.length === 0) return "—";
+  const first = parts[0]?.[0] ?? "";
+  const last = parts.length > 1 ? (parts[parts.length - 1]?.[0] ?? "") : "";
+  return (first + last).toUpperCase();
+}
+
+function splitTrades(value: string | undefined): string[] {
+  return (value ?? "")
+    .split(",")
+    .map((trade) => trade.trim())
+    .filter(Boolean);
+}
+
+function toFormValues(vendor: Vendor): VendorFormValues {
+  return {
+    companyName: vendor.companyName ?? "",
+    contactName: vendor.contactName ?? "",
+    email: vendor.email ?? "",
+    phone: vendor.phone ?? "",
+    companyPhone: vendor.companyPhone ?? "",
+    googleMapsUrl: vendor.googleMapsUrl ?? "",
+    notes: vendor.notes ?? "",
+    totalJobs: vendor.totalJobs ?? 0,
+    address: vendor.address ?? "",
+    city: vendor.city ?? "",
+    state: vendor.state ?? "",
+    zip: vendor.zip ?? "",
+    tradeSpecialties: vendor.tradeSpecialties ?? "",
+    isActive: vendor.isActive,
+    companyId: vendor.companyId ?? null,
+    preferredContact: vendor.preferredContact ?? "Phone",
+  };
+}
+
+interface VendorDetailDrawerProps {
+  open: boolean;
+  vendor: VendorListItem | null;
+  mode: "view" | "edit";
+  onClose: () => void;
+  onModeChange: (mode: "view" | "edit") => void;
+  tradeOptions: string[];
+}
+
+export function VendorDetailDrawer({
+  open,
+  vendor,
+  mode,
+  onClose,
+  onModeChange,
+  tradeOptions,
+}: VendorDetailDrawerProps) {
+  const vendorId = vendor?.id;
+  const { data: facets } = useVendorFacets();
+  const {
+    data: detail,
+    isLoading,
+    error,
+  } = useVendorDetail(vendorId !== undefined && vendorId !== "" ? String(vendorId) : undefined);
+  const updateVendor = useUpdateVendor();
+
+  const [submitError, setSubmitError] = useState<string | null>(null);
+  const [original, setOriginal] = useState<VendorFormValues | null>(null);
+
+  const companies = useMemo(() => facets?.companies ?? [], [facets]);
+
+  const {
+    control,
+    handleSubmit,
+    reset,
+    setValue,
+    trigger,
+    formState: { errors },
+  } = useForm<VendorFormValues>({
+    resolver: zodResolver(vendorSchema),
+    mode: "onChange",
+    defaultValues: {
+      companyName: "",
+      contactName: "",
+      email: "",
+      phone: "",
+      companyPhone: "",
+      googleMapsUrl: "",
+      notes: "",
+      totalJobs: 0,
+      address: "",
+      city: "",
+      state: "",
+      zip: "",
+      tradeSpecialties: "",
+      isActive: true,
+      companyId: null,
+      preferredContact: "Phone",
+    },
+  });
+  const currentValues = useWatch({ control });
+  const isFormValid = vendorSchema.safeParse(currentValues).success;
+
+  useEffect(() => {
+    if (open && detail) {
+      const values = toFormValues(detail);
+      reset(values);
+      setOriginal(values);
+      setSubmitError(null);
+    }
+    if (!open) {
+      setOriginal(null);
+      setSubmitError(null);
+    }
+  }, [open, detail, reset]);
+
+  const onCompanySelected = (company: (typeof companies)[number] | null) => {
+    if (!company) return;
+    const options = { shouldDirty: true, shouldValidate: true } as const;
+    setValue("companyId", company.companyId, options);
+    setValue("companyPhone", company.companyPhone, options);
+    setValue("email", company.email, options);
+    setValue("address", company.address, options);
+    setValue("city", company.city, options);
+    setValue("state", company.state, options);
+    setValue("zip", company.zip, options);
+    setValue("googleMapsUrl", company.googleMapsUrl, options);
+    void trigger();
+  };
+
+  const handleCancel = () => {
+    if (original) {
+      reset(original);
+    }
+    setSubmitError(null);
+    onModeChange("view");
+  };
+
+  const onSubmit = (values: VendorFormValues) => {
+    if (vendorId === undefined || vendorId === null || vendorId === "") return;
+    setSubmitError(null);
+    updateVendor.mutate(
+      { id: vendorId, values },
+      {
+        onSuccess: () => {
+          onModeChange("view");
+        },
+        onError: (err: Error) => {
+          setSubmitError(err.message || "Failed to save vendor");
+        },
+      },
+    );
+  };
+
+  const trades = splitTrades(detail?.tradeSpecialties ?? vendor?.tradeSpecialties);
+  const mapsUrl = detail?.googleMapsUrl;
+
+  return (
+    <Drawer
+      open={open}
+      onClose={updateVendor.isPending ? undefined : onClose}
+      anchor="right"
+      aria-labelledby="vendor-detail-drawer-title"
+      ModalProps={{ keepMounted: false }}
+      sx={{
+        "& .MuiDrawer-paper": {
+          width: { xs: "100%", sm: DRAWER_WIDTH },
+          maxWidth: "100%",
+        },
+      }}
+    >
+      <Stack className="flex h-full flex-col">
+        <Stack
+          direction="row"
+          sx={{
+            alignItems: "center",
+            justifyContent: "space-between",
+            px: 3,
+            py: 2,
+            borderBottom: (theme) => `1px solid ${theme.palette.divider}`,
+          }}
+        >
+          <Stack direction="row" spacing={1.5} sx={{ alignItems: "center" }}>
+            <Box
+              className="flex items-center justify-center"
+              sx={{
+                width: 36,
+                height: 36,
+                borderRadius: "50%",
+                backgroundColor: "var(--accent, #1976d2)",
+                color: "#fff",
+                fontSize: 13,
+                fontWeight: 700,
+                letterSpacing: 0.5,
+              }}
+            >
+              {getInitials(vendor?.contactName ?? "")}
+            </Box>
+            <Box>
+              <Typography
+                id="vendor-detail-drawer-title"
+                variant="subtitle1"
+                component="h2"
+                className="font-semibold"
+              >
+                {vendor?.companyName || "Vendor"}
+              </Typography>
+              <Typography variant="caption" sx={{ color: "text.secondary" }}>
+                {mode === "edit" ? "Editing vendor" : "Vendor details"}
+              </Typography>
+            </Box>
+          </Stack>
+          <IconButton
+            aria-label="Close drawer"
+            onClick={onClose}
+            size="small"
+            disabled={updateVendor.isPending}
+          >
+            <CloseIcon fontSize="small" />
+          </IconButton>
+        </Stack>
+
+        {isLoading ? (
+          <Box className="flex flex-1 items-center justify-center">
+            <CircularProgress size={28} />
+          </Box>
+        ) : error ? (
+          <Alert severity="error" sx={{ m: 2 }}>
+            {error instanceof Error ? error.message : "Failed to load vendor"}
+          </Alert>
+        ) : detail ? (
+          <>
+            {mode === "view" ? (
+              <Stack spacing={3} className="flex-1 overflow-y-auto" sx={{ px: 3, py: 3 }}>
+                {Boolean(submitError) && <Alert severity="error">{submitError}</Alert>}
+
+                <Stack direction="row" spacing={1} sx={{ alignItems: "center" }}>
+                  <Chip
+                    size="small"
+                    label={detail.isActive ? "Active" : "Inactive"}
+                    color={detail.isActive ? "success" : "default"}
+                  />
+                  {Boolean(trades[0]) && (
+                    <Chip
+                      size="small"
+                      variant="outlined"
+                      label={trades.length > 1 ? `${trades[0]} +${trades.length - 1}` : trades[0]}
+                    />
+                  )}
+                </Stack>
+
+                <DetailSection title="Technician">
+                  <DetailField label="Technician Name" value={detail.contactName} />
+                  <DetailField label="Technician Phone" value={detail.phone} />
+                  <DetailField
+                    label="Preferred Contact"
+                    value={PREFERRED_CONTACT_LABELS[detail.preferredContact ?? "Phone"]}
+                  />
+                </DetailSection>
+
+                <DetailSection title="Company">
+                  <DetailField label="Company" value={detail.companyName} />
+                  <DetailField label="Company Phone" value={detail.companyPhone} />
+                  <DetailField label="Email" value={detail.email} />
+                </DetailSection>
+
+                <DetailSection title="Location">
+                  <DetailField
+                    label="Address"
+                    value={[detail.address, detail.city, detail.state, detail.zip]
+                      .filter(Boolean)
+                      .join(", ")}
+                  />
+                  {Boolean(mapsUrl) && (
+                    <Link
+                      href={mapsUrl}
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      className="inline-flex items-center gap-1"
+                    >
+                      <LaunchIcon fontSize="small" />
+                      Open in Google Maps
+                    </Link>
+                  )}
+                </DetailSection>
+
+                <DetailSection title="Trades">
+                  {trades.length === 0 ? (
+                    <Typography variant="body2" sx={{ color: "text.secondary" }}>
+                      No trades specified.
+                    </Typography>
+                  ) : (
+                    <Box className="flex flex-wrap gap-1">
+                      {trades.map((trade, idx) => (
+                        <Chip
+                          key={`${trade}-${idx}`}
+                          size="small"
+                          label={idx === 0 ? `${trade} (primary)` : trade}
+                        />
+                      ))}
+                    </Box>
+                  )}
+                </DetailSection>
+
+                <DetailSection title="Activity">
+                  <DetailField label="Total Jobs" value={String(detail.totalJobs ?? 0)} />
+                </DetailSection>
+
+                {Boolean(detail.notes) && (
+                  <DetailSection title="Notes">
+                    <Typography variant="body2" sx={{ whiteSpace: "pre-wrap" }}>
+                      {detail.notes}
+                    </Typography>
+                  </DetailSection>
+                )}
+              </Stack>
+            ) : (
+              <Box
+                component="form"
+                id="vendor-edit-form"
+                onSubmit={handleSubmit(onSubmit)}
+                className="flex flex-1 flex-col overflow-y-auto"
+                sx={{ px: 3, py: 3 }}
+              >
+                <Stack spacing={3}>
+                  {Boolean(submitError) && <Alert severity="error">{submitError}</Alert>}
+
+                  <Controller
+                    control={control}
+                    name="isActive"
+                    render={({ field }) => (
+                      <FormControlLabel
+                        control={
+                          <Switch
+                            checked={Boolean(field.value)}
+                            onChange={field.onChange}
+                            color="success"
+                          />
+                        }
+                        label={field.value ? "Active" : "Inactive"}
+                        sx={{
+                          alignSelf: "flex-start",
+                        }}
+                      />
+                    )}
+                  />
+
+                  <VendorFormFields
+                    control={control}
+                    errors={errors}
+                    companies={companies}
+                    tradeOptions={tradeOptions}
+                    onCompanySelected={onCompanySelected}
+                    showTotalJobs
+                  />
+                </Stack>
+              </Box>
+            )}
+
+            <Stack
+              direction="row"
+              spacing={2}
+              sx={{
+                px: 3,
+                py: 2,
+                borderTop: (theme) => `1px solid ${theme.palette.divider}`,
+              }}
+            >
+              {mode === "view" ? (
+                <>
+                  {Boolean(mapsUrl) && (
+                    <Tooltip title="Open in Google Maps">
+                      <Button
+                        component="a"
+                        href={mapsUrl}
+                        target="_blank"
+                        rel="noopener noreferrer"
+                        variant="outlined"
+                        startIcon={<LaunchIcon />}
+                      >
+                        Maps
+                      </Button>
+                    </Tooltip>
+                  )}
+                  <Box className="flex-1" />
+                  <Button
+                    variant="contained"
+                    onClick={() => onModeChange("edit")}
+                    startIcon={<EditOutlinedIcon />}
+                  >
+                    Edit
+                  </Button>
+                </>
+              ) : (
+                <>
+                  <Button
+                    variant="outlined"
+                    onClick={handleCancel}
+                    disabled={updateVendor.isPending}
+                    fullWidth
+                  >
+                    Cancel
+                  </Button>
+                  <Button
+                    variant="contained"
+                    type="submit"
+                    form="vendor-edit-form"
+                    disabled={updateVendor.isPending || !isFormValid}
+                    fullWidth
+                  >
+                    {updateVendor.isPending ? "Saving..." : "Save"}
+                  </Button>
+                </>
+              )}
+            </Stack>
+          </>
+        ) : (
+          <Box className="flex flex-1 items-center justify-center">
+            <Typography variant="body2" sx={{ color: "text.secondary" }}>
+              No vendor selected.
+            </Typography>
+          </Box>
+        )}
+      </Stack>
+    </Drawer>
+  );
+}
+
+function DetailSection({ title, children }: { title: string; children: ReactNode }) {
+  return (
+    <Box>
+      <Typography
+        variant="subtitle2"
+        className="font-semibold uppercase"
+        sx={{ color: "text.secondary", mb: 1 }}
+      >
+        {title}
+      </Typography>
+      <Stack spacing={1.5}>{children}</Stack>
+    </Box>
+  );
+}
+
+function DetailField({ label, value }: { label: string; value: string }) {
+  const display = value && value.trim() !== "" ? value : "—";
+  return (
+    <Box>
+      <Typography variant="caption" sx={{ color: "text.secondary", display: "block" }}>
+        {label}
+      </Typography>
+      <Typography variant="body2">{display}</Typography>
+    </Box>
+  );
+}
diff --git a/src/app/(protected)/vendors/_components/vendor-filters-drawer.tsx b/src/app/(protected)/vendors/_components/vendor-filters-drawer.tsx
new file mode 100644
index 00000000..ae4b51ba
--- /dev/null
+++ b/src/app/(protected)/vendors/_components/vendor-filters-drawer.tsx
@@ -0,0 +1,316 @@
+import { useEffect, useMemo, useState, type ReactNode } from "react";
+import BusinessOutlinedIcon from "@mui/icons-material/BusinessOutlined";
+import BuildOutlinedIcon from "@mui/icons-material/BuildOutlined";
+import CloseIcon from "@mui/icons-material/Close";
+import ExpandMoreIcon from "@mui/icons-material/ExpandMore";
+import LocationOnOutlinedIcon from "@mui/icons-material/LocationOnOutlined";
+import TagOutlinedIcon from "@mui/icons-material/TagOutlined";
+import {
+  Accordion,
+  AccordionDetails,
+  AccordionSummary,
+  Autocomplete,
+  Box,
+  Button,
+  Checkbox,
+  Chip,
+  Drawer,
+  IconButton,
+  Stack,
+  TextField,
+  Typography,
+} from "@mui/material";
+import type {
+  VendorFacets,
+  VendorFacetCompany,
+  VendorFacetJobBucket,
+  VendorFacetLocation,
+} from "@/domain/vendors/types/vendor";
+import { emptyVendorFilters, type VendorFilters } from "./vendor-filters";
+
+interface VendorFiltersDrawerProps {
+  open: boolean;
+  onClose: () => void;
+  facets: VendorFacets | undefined;
+  appliedFilters: VendorFilters;
+  onApply: (filters: VendorFilters) => void;
+}
+
+const DRAWER_WIDTH = 360;
+
+function FilterSection({
+  title,
+  icon,
+  children,
+}: {
+  title: string;
+  icon: ReactNode;
+  children: ReactNode;
+}) {
+  return (
+    <Accordion disableGutters elevation={0} square sx={{ borderBottom: 1, borderColor: "divider" }}>
+      <AccordionSummary expandIcon={<ExpandMoreIcon />} aria-controls={`${title}-filters-content`}>
+        <Stack direction="row" spacing={1.5} sx={{ alignItems: "center" }}>
+          <Box sx={{ color: "primary.main", display: "flex" }}>{icon}</Box>
+          <Typography variant="subtitle1" className="font-semibold">
+            {title}
+          </Typography>
+        </Stack>
+      </AccordionSummary>
+      <AccordionDetails id={`${title}-filters-content`} sx={{ pt: 0, pb: 2.5 }}>
+        {children}
+      </AccordionDetails>
+    </Accordion>
+  );
+}
+
+export function VendorFiltersDrawer({
+  open,
+  onClose,
+  facets,
+  appliedFilters,
+  onApply,
+}: VendorFiltersDrawerProps) {
+  const [draft, setDraft] = useState<VendorFilters>(appliedFilters);
+
+  useEffect(() => {
+    if (open) {
+      setDraft(appliedFilters);
+    }
+  }, [open, appliedFilters]);
+
+  const companyOptions = useMemo(() => facets?.companies ?? [], [facets]);
+  const tradeOptions = useMemo(() => facets?.trades ?? [], [facets]);
+  const locationOptions = useMemo(() => facets?.locations ?? [], [facets]);
+  const jobBucketOptions = useMemo(() => facets?.jobBuckets ?? [], [facets]);
+
+  const activeCount =
+    draft.companies.length + draft.trades.length + draft.locations.length + draft.jobBuckets.length;
+
+  const handleClear = () => {
+    setDraft(emptyVendorFilters);
+  };
+
+  const handleApply = () => {
+    onApply(draft);
+    onClose();
+  };
+
+  return (
+    <Drawer
+      open={open}
+      onClose={onClose}
+      anchor="right"
+      aria-labelledby="vendor-filters-drawer-title"
+      ModalProps={{ keepMounted: false }}
+      sx={{
+        "& .MuiDrawer-paper": {
+          width: { xs: "100%", sm: DRAWER_WIDTH },
+          maxWidth: "100%",
+        },
+      }}
+    >
+      <Stack className="flex h-full flex-col">
+        <Stack
+          direction="row"
+          sx={{
+            alignItems: "center",
+            justifyContent: "space-between",
+            px: 3,
+            py: 2,
+            borderBottom: (theme) => `1px solid ${theme.palette.divider}`,
+          }}
+        >
+          <Stack direction="row" spacing={1} sx={{ alignItems: "center" }}>
+            <Typography id="vendor-filters-drawer-title" variant="h6" component="h2">
+              Filters
+            </Typography>
+            {activeCount > 0 && <Chip size="small" color="primary" label={activeCount} />}
+          </Stack>
+          <IconButton aria-label="Close filters" onClick={onClose} size="small">
+            <CloseIcon fontSize="small" />
+          </IconButton>
+        </Stack>
+
+        <Box className="flex-1 overflow-y-auto" sx={{ px: 2.5 }}>
+          <FilterSection title="Company" icon={<BusinessOutlinedIcon />}>
+            <Stack direction="row" sx={{ alignItems: "center", justifyContent: "space-between" }}>
+              <Typography variant="caption" sx={{ color: "text.secondary" }}>
+                Select vendor companies
+              </Typography>
+              <Button
+                size="small"
+                onClick={() =>
+                  setDraft((current) => ({
+                    ...current,
+                    companies:
+                      current.companies.length === companyOptions.length
+                        ? []
+                        : companyOptions.map((company) => company.name),
+                  }))
+                }
+              >
+                {draft.companies.length === companyOptions.length && companyOptions.length > 0
+                  ? "Clear all"
+                  : "Select all"}
+              </Button>
+            </Stack>
+            <Autocomplete
+              multiple
+              size="small"
+              options={companyOptions}
+              getOptionLabel={(option) => (typeof option === "string" ? option : option.name)}
+              isOptionEqualToValue={(option, value) =>
+                typeof option === "string" || typeof value === "string"
+                  ? option === value
+                  : option.name === value.name
+              }
+              value={companyOptions.filter((option) => draft.companies.includes(option.name))}
+              onChange={(_event, value) => {
+                const next = (value as (string | VendorFacetCompany)[]).map((entry) =>
+                  typeof entry === "string" ? entry : entry.name,
+                );
+                setDraft((current) => ({ ...current, companies: next }));
+              }}
+              renderOption={(props, option, { selected }) => {
+                const { key, ...optionProps } = props;
+                return (
+                  <li key={key} {...optionProps}>
+                    <Checkbox checked={selected} size="small" sx={{ mr: 1 }} />
+                    {option.name}
+                  </li>
+                );
+              }}
+              renderValue={(value, getItemProps) =>
+                value.map((option, index) => {
+                  const label = typeof option === "string" ? option : option.name;
+                  const tagProps = getItemProps({ index });
+                  const { key, ...chipProps } = tagProps;
+                  return <Chip key={key} size="small" label={label} {...chipProps} />;
+                })
+              }
+              renderInput={(params) => (
+                <TextField
+                  {...params}
+                  placeholder={draft.companies.length === 0 ? "All companies" : ""}
+                />
+              )}
+            />
+          </FilterSection>
+
+          <FilterSection title="Trade" icon={<BuildOutlinedIcon />}>
+            <Autocomplete
+              multiple
+              size="small"
+              options={tradeOptions}
+              value={draft.trades}
+              onChange={(_event, value) =>
+                setDraft((current) => ({ ...current, trades: value as string[] }))
+              }
+              renderValue={(value, getItemProps) =>
+                value.map((option, index) => {
+                  const tagProps = getItemProps({ index });
+                  const { key, ...chipProps } = tagProps;
+                  return <Chip key={key} size="small" label={option} {...chipProps} />;
+                })
+              }
+              renderInput={(params) => (
+                <TextField
+                  {...params}
+                  placeholder={draft.trades.length === 0 ? "All trades" : ""}
+                />
+              )}
+            />
+          </FilterSection>
+
+          <FilterSection title="Location" icon={<LocationOnOutlinedIcon />}>
+            <Autocomplete
+              multiple
+              size="small"
+              options={locationOptions}
+              getOptionLabel={(option) => (typeof option === "string" ? option : option.label)}
+              isOptionEqualToValue={(option, value) =>
+                typeof option === "string" || typeof value === "string"
+                  ? option === value
+                  : option.label === value.label
+              }
+              value={locationOptions.filter((option) => draft.locations.includes(option.label))}
+              onChange={(_event, value) => {
+                const next = (value as (string | VendorFacetLocation)[]).map((entry) =>
+                  typeof entry === "string" ? entry : entry.label,
+                );
+                setDraft((current) => ({ ...current, locations: next }));
+              }}
+              renderValue={(value, getItemProps) =>
+                value.map((option, index) => {
+                  const label = typeof option === "string" ? option : option.label;
+                  const tagProps = getItemProps({ index });
+                  const { key, ...chipProps } = tagProps;
+                  return <Chip key={key} size="small" label={label} {...chipProps} />;
+                })
+              }
+              renderInput={(params) => (
+                <TextField
+                  {...params}
+                  placeholder={draft.locations.length === 0 ? "All locations" : ""}
+                />
+              )}
+            />
+          </FilterSection>
+
+          <FilterSection title="Total Jobs" icon={<TagOutlinedIcon />}>
+            <Autocomplete
+              multiple
+              size="small"
+              options={jobBucketOptions}
+              getOptionLabel={(option) => (typeof option === "string" ? option : option.label)}
+              isOptionEqualToValue={(option, value) =>
+                typeof option === "string" || typeof value === "string"
+                  ? option === value
+                  : option.id === value.id
+              }
+              value={jobBucketOptions.filter((option) => draft.jobBuckets.includes(option.id))}
+              onChange={(_event, value) => {
+                const next = (value as (string | VendorFacetJobBucket)[]).map((entry) =>
+                  typeof entry === "string" ? entry : entry.id,
+                );
+                setDraft((current) => ({ ...current, jobBuckets: next }));
+              }}
+              renderValue={(value, getItemProps) =>
+                value.map((option, index) => {
+                  const label = typeof option === "string" ? option : option.label;
+                  const tagProps = getItemProps({ index });
+                  const { key, ...chipProps } = tagProps;
+                  return <Chip key={key} size="small" label={label} {...chipProps} />;
+                })
+              }
+              renderInput={(params) => (
+                <TextField
+                  {...params}
+                  placeholder={draft.jobBuckets.length === 0 ? "All job counts" : ""}
+                />
+              )}
+            />
+          </FilterSection>
+        </Box>
+
+        <Stack
+          direction="row"
+          spacing={2}
+          sx={{
+            px: 3,
+            py: 2,
+            borderTop: (theme) => `1px solid ${theme.palette.divider}`,
+          }}
+        >
+          <Button variant="outlined" onClick={handleClear} disabled={activeCount === 0} fullWidth>
+            Clear all
+          </Button>
+          <Button variant="contained" onClick={handleApply} fullWidth>
+            Apply
+          </Button>
+        </Stack>
+      </Stack>
+    </Drawer>
+  );
+}
diff --git a/src/app/(protected)/vendors/_components/vendor-filters.ts b/src/app/(protected)/vendors/_components/vendor-filters.ts
new file mode 100644
index 00000000..3c236daa
--- /dev/null
+++ b/src/app/(protected)/vendors/_components/vendor-filters.ts
@@ -0,0 +1,13 @@
+export interface VendorFilters {
+  companies: string[];
+  trades: string[];
+  locations: string[];
+  jobBuckets: string[];
+}
+
+export const emptyVendorFilters: VendorFilters = {
+  companies: [],
+  trades: [],
+  locations: [],
+  jobBuckets: [],
+};
diff --git a/src/app/(protected)/vendors/_components/vendor-form-fields.tsx b/src/app/(protected)/vendors/_components/vendor-form-fields.tsx
new file mode 100644
index 00000000..a680d383
--- /dev/null
+++ b/src/app/(protected)/vendors/_components/vendor-form-fields.tsx
@@ -0,0 +1,420 @@
+import { useState } from "react";
+import { Controller, type Control, type FieldErrors } from "react-hook-form";
+import AddIcon from "@mui/icons-material/Add";
+import ArrowDownwardIcon from "@mui/icons-material/ArrowDownward";
+import ArrowUpwardIcon from "@mui/icons-material/ArrowUpward";
+import CloseIcon from "@mui/icons-material/Close";
+import {
+  Autocomplete,
+  Box,
+  Button,
+  Chip,
+  Divider,
+  FormLabel,
+  Stack,
+  TextField,
+  ToggleButton,
+  ToggleButtonGroup,
+  Typography,
+} from "@mui/material";
+import {
+  VENDOR_PREFERRED_CONTACT_VALUES,
+  type VendorFacetCompany,
+  type VendorPreferredContact,
+} from "@/domain/vendors/types/vendor";
+import type { VendorFormValues } from "@/domain/vendors/schemas/vendor-schema";
+
+interface VendorFormFieldsProps {
+  control: Control<VendorFormValues>;
+  errors: FieldErrors<VendorFormValues>;
+  companies: VendorFacetCompany[];
+  tradeOptions: string[];
+  onCompanySelected: (company: VendorFacetCompany | null) => void;
+  showTotalJobs?: boolean;
+}
+
+function splitTrades(value: string | undefined): string[] {
+  return (value ?? "")
+    .split(",")
+    .map((trade) => trade.trim())
+    .filter(Boolean);
+}
+
+function joinTrades(trades: string[]): string {
+  return trades.join(", ");
+}
+
+function formatPhoneMask(input: string): string {
+  const digits = (input ?? "").replace(/\D+/g, "").slice(0, 10);
+  if (digits.length === 0) return "";
+  if (digits.length < 4) return `(${digits}`;
+  if (digits.length < 7) return `(${digits.slice(0, 3)}) ${digits.slice(3)}`;
+  return `(${digits.slice(0, 3)}) ${digits.slice(3, 6)}-${digits.slice(6)}`;
+}
+
+const PREFERRED_CONTACT_LABELS: Record<VendorPreferredContact, string> = {
+  Phone: "Phone",
+  Email: "Email",
+  Text: "Text",
+};
+
+export function VendorFormFields({
+  control,
+  errors,
+  companies,
+  tradeOptions,
+  onCompanySelected,
+  showTotalJobs = false,
+}: VendorFormFieldsProps) {
+  const [tradeInput, setTradeInput] = useState("");
+
+  return (
+    <Stack spacing={3}>
+      <Box>
+        <Typography variant="subtitle2" className="font-semibold uppercase">
+          Technician
+        </Typography>
+        <Stack spacing={2} className="mt-2">
+          <Controller
+            control={control}
+            name="contactName"
+            render={({ field }) => (
+              <TextField
+                {...field}
+                label="Technician Name"
+                required
+                error={Boolean(errors.contactName)}
+                helperText={errors.contactName?.message}
+                fullWidth
+              />
+            )}
+          />
+          <Controller
+            control={control}
+            name="phone"
+            render={({ field }) => (
+              <TextField
+                {...field}
+                label="Technician Phone"
+                placeholder="(XXX) XXX-XXXX"
+                inputMode="tel"
+                value={field.value ?? ""}
+                onChange={(event) => field.onChange(formatPhoneMask(event.target.value))}
+                error={Boolean(errors.phone)}
+                helperText={errors.phone?.message}
+                fullWidth
+              />
+            )}
+          />
+          <Box>
+            <FormLabel component="legend" sx={{ mb: 0.5 }}>
+              Preferred Contact
+            </FormLabel>
+            <Controller
+              control={control}
+              name="preferredContact"
+              render={({ field }) => (
+                <ToggleButtonGroup
+                  exclusive
+                  size="small"
+                  value={field.value ?? "Phone"}
+                  onChange={(_event, value: VendorPreferredContact | null) => {
+                    if (value) field.onChange(value);
+                  }}
+                  aria-label="Preferred contact"
+                >
+                  {VENDOR_PREFERRED_CONTACT_VALUES.map((option) => (
+                    <ToggleButton key={option} value={option} aria-label={option}>
+                      {PREFERRED_CONTACT_LABELS[option]}
+                    </ToggleButton>
+                  ))}
+                </ToggleButtonGroup>
+              )}
+            />
+          </Box>
+        </Stack>
+      </Box>
+
+      <Divider />
+
+      <Box>
+        <Typography variant="subtitle2" className="font-semibold uppercase">
+          Company
+        </Typography>
+        <Stack spacing={2} className="mt-2">
+          <Controller
+            control={control}
+            name="companyName"
+            render={({ field }) => (
+              <Controller
+                control={control}
+                name="companyId"
+                render={({ field: companyIdField }) => (
+                  <Autocomplete
+                    freeSolo
+                    options={companies}
+                    getOptionLabel={(option) => (typeof option === "string" ? option : option.name)}
+                    isOptionEqualToValue={(option, value) =>
+                      typeof option === "string" || typeof value === "string"
+                        ? option === value
+                        : option.name === value.name
+                    }
+                    value={field.value ?? ""}
+                    inputValue={field.value ?? ""}
+                    onInputChange={(_event, value, reason) => {
+                      if (reason === "input") {
+                        field.onChange(value);
+                        companyIdField.onChange(null);
+                      }
+                    }}
+                    onChange={(_event, value, reason) => {
+                      if (typeof value === "string") {
+                        field.onChange(value);
+                        companyIdField.onChange(null);
+                        return;
+                      }
+                      if (value) {
+                        field.onChange(value.name);
+                        companyIdField.onChange(value.companyId);
+                        if (reason === "selectOption") {
+                          onCompanySelected(value);
+                        }
+                      } else {
+                        field.onChange("");
+                        companyIdField.onChange(null);
+                      }
+                    }}
+                    renderInput={(params) => (
+                      <TextField
+                        {...params}
+                        label="Company"
+                        required
+                        placeholder="Select or type a company"
+                        error={Boolean(errors.companyName)}
+                        helperText={errors.companyName?.message}
+                      />
+                    )}
+                  />
+                )}
+              />
+            )}
+          />
+          <Controller
+            control={control}
+            name="companyPhone"
+            render={({ field }) => (
+              <TextField
+                {...field}
+                label="Company Phone"
+                placeholder="(XXX) XXX-XXXX"
+                inputMode="tel"
+                value={field.value ?? ""}
+                onChange={(event) => field.onChange(formatPhoneMask(event.target.value))}
+                error={Boolean(errors.companyPhone)}
+                helperText={errors.companyPhone?.message}
+                fullWidth
+              />
+            )}
+          />
+          <Controller
+            control={control}
+            name="email"
+            render={({ field }) => (
+              <TextField
+                {...field}
+                label="Email"
+                type="email"
+                error={Boolean(errors.email)}
+                helperText={errors.email?.message}
+                fullWidth
+              />
+            )}
+          />
+          <Controller
+            control={control}
+            name="address"
+            render={({ field }) => <TextField {...field} label="Address" fullWidth />}
+          />
+          <Stack direction={{ xs: "column", sm: "row" }} spacing={2}>
+            <Controller
+              control={control}
+              name="city"
+              render={({ field }) => <TextField {...field} label="City" fullWidth />}
+            />
+            <Controller
+              control={control}
+              name="state"
+              render={({ field }) => (
+                <TextField {...field} label="State" placeholder="e.g., IL" fullWidth />
+              )}
+            />
+            <Controller
+              control={control}
+              name="zip"
+              render={({ field }) => <TextField {...field} label="Zip" fullWidth />}
+            />
+          </Stack>
+          <Controller
+            control={control}
+            name="googleMapsUrl"
+            render={({ field }) => (
+              <TextField
+                {...field}
+                label="Google Maps URL"
+                placeholder="https://maps.google.com/..."
+                error={Boolean(errors.googleMapsUrl)}
+                helperText={errors.googleMapsUrl?.message ?? "Must use HTTPS"}
+                fullWidth
+              />
+            )}
+          />
+        </Stack>
+      </Box>
+
+      <Divider />
+
+      <Box>
+        <FormLabel component="legend">Trade Specialties</FormLabel>
+        <Typography variant="caption" sx={{ color: "text.secondary" }}>
+          First trade is primary. Reorder with the arrows.
+        </Typography>
+        <Controller
+          control={control}
+          name="tradeSpecialties"
+          render={({ field }) => {
+            const trades = splitTrades(field.value);
+            const remove = (trade: string) => {
+              field.onChange(joinTrades(trades.filter((entry) => entry !== trade)));
+            };
+            const move = (index: number, direction: -1 | 1) => {
+              const next = [...trades];
+              const target = index + direction;
+              if (target < 0 || target >= next.length) return;
+              [next[index], next[target]] = [next[target], next[index]];
+              field.onChange(joinTrades(next));
+            };
+            const add = (trade: string) => {
+              const normalized = trade.trim();
+              if (!normalized || trades.includes(normalized)) {
+                setTradeInput("");
+                return;
+              }
+              field.onChange(joinTrades([...trades, normalized]));
+              setTradeInput("");
+            };
+
+            return (
+              <Box className="mt-2">
+                <Box className="flex flex-wrap gap-1.5">
+                  {trades.length === 0 ? (
+                    <Typography variant="body2" sx={{ color: "text.secondary" }}>
+                      No trades selected.
+                    </Typography>
+                  ) : (
+                    trades.map((trade, index) => (
+                      <Chip
+                        key={`${trade}-${index}`}
+                        label={index === 0 ? `${trade} (primary)` : trade}
+                        onDelete={() => remove(trade)}
+                        deleteIcon={<CloseIcon data-testid={`remove-trade-${trade}`} />}
+                        sx={{ px: 0.5 }}
+                      />
+                    ))
+                  )}
+                </Box>
+                <Stack direction="row" spacing={1} className="mt-2" sx={{ alignItems: "center" }}>
+                  <Autocomplete
+                    freeSolo
+                    options={tradeOptions}
+                    value={null}
+                    inputValue={tradeInput}
+                    onInputChange={(_event, value, reason) => {
+                      if (reason === "input") setTradeInput(value);
+                    }}
+                    onChange={(_event, value) => {
+                      if (typeof value === "string") add(value);
+                    }}
+                    renderInput={(params) => (
+                      <TextField
+                        {...params}
+                        label="Add Trade"
+                        placeholder="Type or select a trade"
+                        onKeyDown={(event) => {
+                          if (event.key === "Enter") {
+                            event.preventDefault();
+                            add(tradeInput);
+                          }
+                        }}
+                      />
+                    )}
+                    className="flex-1"
+                  />
+                  <Button
+                    color="primary"
+                    onClick={() => add(tradeInput)}
+                    aria-label="Add trade"
+                    disabled={!tradeInput.trim()}
+                  >
+                    <AddIcon />
+                  </Button>
+                </Stack>
+                {trades.length > 1 && (
+                  <Stack direction="row" spacing={1} className="mt-2 flex-wrap">
+                    {trades.map((trade, index) => (
+                      <Stack key={`reorder-${trade}-${index}`} direction="row" spacing={0.5}>
+                        <Button
+                          size="small"
+                          aria-label={`Move ${trade} up`}
+                          disabled={index === 0}
+                          onClick={() => move(index, -1)}
+                        >
+                          <ArrowUpwardIcon fontSize="small" />
+                        </Button>
+                        <Button
+                          size="small"
+                          aria-label={`Move ${trade} down`}
+                          disabled={index === trades.length - 1}
+                          onClick={() => move(index, 1)}
+                        >
+                          <ArrowDownwardIcon fontSize="small" />
+                        </Button>
+                      </Stack>
+                    ))}
+                  </Stack>
+                )}
+              </Box>
+            );
+          }}
+        />
+      </Box>
+
+      <Divider />
+
+      {showTotalJobs && (
+        <Controller
+          control={control}
+          name="totalJobs"
+          render={({ field }) => (
+            <TextField
+              {...field}
+              value={field.value ?? 0}
+              label="Total Jobs"
+              type="number"
+              slotProps={{ input: { readOnly: true } }}
+              helperText="Calculated from work-order history"
+              fullWidth
+            />
+          )}
+        />
+      )}
+
+      <Controller
+        control={control}
+        name="notes"
+        render={({ field }) => (
+          <TextField {...field} label="Notes" multiline minRows={3} fullWidth />
+        )}
+      />
+    </Stack>
+  );
+}
diff --git a/src/app/(protected)/vendors/_components/vendor-form.tsx b/src/app/(protected)/vendors/_components/vendor-form.tsx
index ed7b37b9..4f8bb806 100644
--- a/src/app/(protected)/vendors/_components/vendor-form.tsx
+++ b/src/app/(protected)/vendors/_components/vendor-form.tsx
@@ -6,34 +6,40 @@ import {
   Alert,
   Box,
   Button,
-  Checkbox,
   CircularProgress,
   FormControlLabel,
-  FormGroup,
-  FormLabel,
   Paper,
   Stack,
-  TextField,
+  Switch,
   Typography,
 } from "@mui/material";
 import { VendorPortalTokenPanel } from "./vendor-portal-token-panel";
+import { VendorFormFields } from "./vendor-form-fields";
 import { vendorSchema, type VendorFormValues } from "@/domain/vendors/schemas/vendor-schema";
 import { useCreateVendor } from "@/domain/vendors/use-cases/use-create-vendor";
 import { useUpdateVendor } from "@/domain/vendors/use-cases/use-update-vendor";
 import { useVendorDetail } from "@/domain/vendors/use-cases/use-vendor-detail";
+import { useVendorFacets } from "@/domain/vendors/use-cases/use-vendor-facets";
 import { useDropdownOptionsByCategory } from "@/domain/settings/dropdown-options/use-cases/use-dropdown-options-by-category";
+import type { VendorFacetCompany } from "@/domain/vendors/types/vendor";
 
 const defaultValues: VendorFormValues = {
   companyName: "",
   contactName: "",
   email: "",
   phone: "",
+  companyPhone: "",
+  googleMapsUrl: "",
+  notes: "",
+  totalJobs: 0,
   address: "",
   city: "",
   state: "",
   zip: "",
   tradeSpecialties: "",
   isActive: true,
+  companyId: null,
+  preferredContact: "Phone",
 };
 
 export default function VendorFormPage() {
@@ -42,21 +48,25 @@ export default function VendorFormPage() {
   const isEdit = Boolean(id);
 
   const { data: vendor, isLoading, error } = useVendorDetail(id);
+  const { data: facets } = useVendorFacets();
   const { data: trades = [] } = useDropdownOptionsByCategory("Trade");
   const createVendor = useCreateVendor();
   const updateVendor = useUpdateVendor();
 
   const {
-    register,
     handleSubmit,
     reset,
     setValue,
     control,
+    trigger,
     formState: { errors },
   } = useForm<VendorFormValues>({
     resolver: zodResolver(vendorSchema),
     defaultValues,
+    mode: "onChange",
   });
+  const currentValues = useWatch({ control });
+  const isFormValid = vendorSchema.safeParse(currentValues).success;
 
   useEffect(() => {
     if (vendor && isEdit) {
@@ -65,37 +75,44 @@ export default function VendorFormPage() {
         contactName: vendor.contactName,
         email: vendor.email,
         phone: vendor.phone,
+        companyPhone: vendor.companyPhone,
+        googleMapsUrl: vendor.googleMapsUrl,
+        notes: vendor.notes,
+        totalJobs: vendor.totalJobs,
         address: vendor.address,
         city: vendor.city,
         state: vendor.state,
         zip: vendor.zip,
         tradeSpecialties: vendor.tradeSpecialties,
         isActive: vendor.isActive,
+        companyId: vendor.companyId ?? null,
+        preferredContact: vendor.preferredContact ?? "Phone",
       });
     }
   }, [vendor, isEdit, reset]);
 
-  const tradeSpecialties = useWatch({ control, name: "tradeSpecialties" });
-  const selectedTrades = (tradeSpecialties || "")
-    .split(",")
-    .map((trade) => trade.trim())
-    .filter(Boolean);
-
-  const toggleTrade = (tradeValue: string) => {
-    const updated = selectedTrades.includes(tradeValue)
-      ? selectedTrades.filter((trade) => trade !== tradeValue)
-      : [...selectedTrades, tradeValue];
-    setValue("tradeSpecialties", updated.join(", "));
+  const onCompanySelected = (company: VendorFacetCompany | null) => {
+    if (!company) return;
+    const options = { shouldDirty: true, shouldValidate: true } as const;
+    setValue("companyId", company.companyId, options);
+    setValue("companyPhone", company.companyPhone, options);
+    setValue("email", company.email, options);
+    setValue("address", company.address, options);
+    setValue("city", company.city, options);
+    setValue("state", company.state, options);
+    setValue("zip", company.zip, options);
+    setValue("googleMapsUrl", company.googleMapsUrl, options);
+    void trigger();
   };
 
   const isSaving = createVendor.isPending || updateVendor.isPending;
 
   const onSubmit = (values: VendorFormValues) => {
     if (isEdit && id) {
-      updateVendor.mutate({ id, values });
+      updateVendor.mutate({ id, values }, { onSuccess: () => navigate("/vendors") });
       return;
     }
-    createVendor.mutate(values);
+    createVendor.mutate(values, { onSuccess: () => navigate("/vendors") });
   };
 
   if (isEdit && isLoading) {
@@ -112,7 +129,7 @@ export default function VendorFormPage() {
         <Stack spacing={4}>
           <Typography variant="h5">{isEdit ? "Edit Vendor" : "Create Vendor"}</Typography>
 
-          {error && (
+          {Boolean(error) && (
             <Alert severity="error">
               {error instanceof Error ? error.message : "Failed to load vendor"}
             </Alert>
@@ -120,73 +137,27 @@ export default function VendorFormPage() {
 
           <Box component="form" onSubmit={handleSubmit(onSubmit)}>
             <Stack spacing={3}>
-              <Typography variant="subtitle2" className="font-semibold uppercase">
-                General Details
-              </Typography>
-              <Stack direction={{ xs: "column", sm: "row" }} spacing={2}>
-                <TextField
-                  label="Company Name"
-                  required
-                  fullWidth
-                  error={Boolean(errors.companyName)}
-                  helperText={errors.companyName?.message}
-                  {...register("companyName")}
-                />
-                <TextField label="Contact Name" fullWidth {...register("contactName")} />
-              </Stack>
-              <Stack direction={{ xs: "column", sm: "row" }} spacing={2}>
-                <TextField
-                  label="Email"
-                  required
-                  fullWidth
-                  type="email"
-                  error={Boolean(errors.email)}
-                  helperText={errors.email?.message}
-                  {...register("email")}
-                />
-                <TextField label="Phone" fullWidth {...register("phone")} />
-              </Stack>
-
-              <Typography variant="subtitle2" className="font-semibold uppercase">
-                Address
-              </Typography>
-              <TextField label="Address" fullWidth {...register("address")} />
-              <Stack direction={{ xs: "column", sm: "row" }} spacing={2}>
-                <TextField label="City" fullWidth {...register("city")} />
-                <TextField label="State" fullWidth placeholder="e.g., IL" {...register("state")} />
-                <TextField label="Zip" fullWidth {...register("zip")} />
-              </Stack>
-
-              <FormGroup>
-                <FormLabel component="legend">Trade Specialties</FormLabel>
-                <Box className="mt-2 flex flex-wrap gap-2">
-                  {trades.map((trade) => (
-                    <FormControlLabel
-                      key={String(trade.id)}
-                      control={
-                        <Checkbox
-                          checked={selectedTrades.includes(trade.value)}
-                          onChange={() => toggleTrade(trade.value)}
-                        />
-                      }
-                      label={trade.value}
-                    />
-                  ))}
-                </Box>
-              </FormGroup>
-
               <Controller
                 name="isActive"
                 control={control}
                 render={({ field }) => (
                   <FormControlLabel
-                    control={<Checkbox checked={field.value} onChange={field.onChange} />}
-                    label="Active"
+                    control={<Switch checked={Boolean(field.value)} onChange={field.onChange} />}
+                    label={field.value ? "Active" : "Inactive"}
                   />
                 )}
               />
 
-              {isEdit && id && <VendorPortalTokenPanel vendorId={id} />}
+              <VendorFormFields
+                control={control}
+                errors={errors}
+                companies={facets?.companies ?? []}
+                tradeOptions={trades.map((trade) => trade.value)}
+                onCompanySelected={onCompanySelected}
+                showTotalJobs={isEdit}
+              />
+
+              {isEdit && id != null && <VendorPortalTokenPanel vendorId={id} />}
 
               <Stack
                 direction="row"
@@ -198,7 +169,7 @@ export default function VendorFormPage() {
                 <Button variant="outlined" onClick={() => navigate("/vendors")} disabled={isSaving}>
                   Cancel
                 </Button>
-                <Button type="submit" variant="contained" disabled={isSaving}>
+                <Button type="submit" variant="contained" disabled={isSaving || !isFormValid}>
                   {isSaving ? "Saving..." : isEdit ? "Update" : "Create"}
                 </Button>
               </Stack>
diff --git a/src/app/(protected)/vendors/index.tsx b/src/app/(protected)/vendors/index.tsx
index d4a48966..e7e0d746 100644
--- a/src/app/(protected)/vendors/index.tsx
+++ b/src/app/(protected)/vendors/index.tsx
@@ -1,9 +1,11 @@
-import { useMemo, useState } from "react";
-import { useNavigate } from "react-router";
+import { useMemo, useState, type KeyboardEvent, type MouseEvent } from "react";
 import DeleteOutlineIcon from "@mui/icons-material/DeleteOutlined";
 import EditOutlinedIcon from "@mui/icons-material/EditOutlined";
+import FilterListIcon from "@mui/icons-material/FilterList";
+import VisibilityOutlinedIcon from "@mui/icons-material/VisibilityOutlined";
 import {
   Alert,
+  Avatar,
   Box,
   Button,
   Chip,
@@ -14,8 +16,12 @@ import {
   DialogContentText,
   DialogTitle,
   IconButton,
+  Link,
+  List,
+  ListItem,
   Paper,
   Stack,
+  Tab,
   Table,
   TableBody,
   TableCell,
@@ -23,39 +29,193 @@ import {
   TableHead,
   TablePagination,
   TableRow,
+  Tabs,
   TextField,
   Tooltip,
   Typography,
 } from "@mui/material";
+import { VendorCreateModal } from "./_components/vendor-create-modal";
+import { VendorDetailDrawer } from "./_components/vendor-detail-drawer";
+import { VendorFiltersDrawer } from "./_components/vendor-filters-drawer";
+import { emptyVendorFilters, type VendorFilters } from "./_components/vendor-filters";
 import type { VendorListItem } from "@/domain/vendors/types/vendor";
 import { useDeleteVendor } from "@/domain/vendors/use-cases/use-delete-vendor";
+import { useVendorDeactivationImpact } from "@/domain/vendors/use-cases/use-vendor-deactivation-impact";
+import { useVendorFacets } from "@/domain/vendors/use-cases/use-vendor-facets";
 import { useVendorsList } from "@/domain/vendors/use-cases/use-vendors-list";
+import { useDropdownOptionsByCategory } from "@/domain/settings/dropdown-options/use-cases/use-dropdown-options-by-category";
 import { useDebounce } from "@/hooks/use-debounce";
 
+const TABLE_COLUMNS = [
+  "Company",
+  "Technician",
+  "Location",
+  "Trade",
+  "Phone",
+  "Email",
+  "Total Jobs",
+  "Status",
+  "View",
+  "Edit",
+] as const;
+
+function getInitials(name: string): string {
+  const parts = name.trim().split(/\s+/).filter(Boolean);
+  if (parts.length === 0) return "?";
+  const first = parts[0]?.[0] ?? "";
+  const last = parts.length > 1 ? (parts[parts.length - 1]?.[0] ?? "") : "";
+  return (first + last).toUpperCase();
+}
+
+function splitTrades(value: string | undefined): string[] {
+  return (value ?? "")
+    .split(",")
+    .map((trade) => trade.trim())
+    .filter(Boolean);
+}
+
+interface AppliedChip {
+  category: keyof VendorFilters;
+  value: string;
+  label: string;
+}
+
+function describeChips(
+  filters: VendorFilters,
+  jobBucketLabels: Map<string, string>,
+): AppliedChip[] {
+  const chips: AppliedChip[] = [];
+  filters.companies.forEach((value) => chips.push({ category: "companies", value, label: value }));
+  filters.trades.forEach((value) => chips.push({ category: "trades", value, label: value }));
+  filters.locations.forEach((value) => chips.push({ category: "locations", value, label: value }));
+  filters.jobBuckets.forEach((value) =>
+    chips.push({ category: "jobBuckets", value, label: jobBucketLabels.get(value) ?? value }),
+  );
+  return chips;
+}
+
 export default function VendorsListPage() {
-  const navigate = useNavigate();
   const [search, setSearch] = useState("");
   const [page, setPage] = useState(0);
   const [pageSize, setPageSize] = useState(12);
+  const [isActive, setIsActive] = useState(true);
+  const [appliedFilters, setAppliedFilters] = useState<VendorFilters>(emptyVendorFilters);
+  const [filtersOpen, setFiltersOpen] = useState(false);
+  const [createOpen, setCreateOpen] = useState(false);
   const [deleteTarget, setDeleteTarget] = useState<VendorListItem | null>(null);
+  const [deleteError, setDeleteError] = useState<string | null>(null);
+  const [detailTarget, setDetailTarget] = useState<VendorListItem | null>(null);
+  const [detailMode, setDetailMode] = useState<"view" | "edit">("view");
 
   const debouncedSearch = useDebounce(search, 300);
   const deleteVendor = useDeleteVendor();
+  const {
+    data: deactivationImpact,
+    isLoading: isLoadingImpact,
+    error: impactError,
+  } = useVendorDeactivationImpact(deleteTarget?.id);
+  const { data: facets } = useVendorFacets(isActive);
+  const { data: trades = [] } = useDropdownOptionsByCategory("Trade");
+  const tradeOptions = useMemo(() => trades.map((trade) => trade.value), [trades]);
 
   const listParams = useMemo(
-    () => ({ search: debouncedSearch, page: page + 1, pageSize }),
-    [debouncedSearch, page, pageSize],
+    () => ({
+      search: debouncedSearch,
+      page: page + 1,
+      pageSize,
+      isActive,
+      companies: appliedFilters.companies,
+      trades: appliedFilters.trades,
+      locations: appliedFilters.locations,
+      jobBuckets: appliedFilters.jobBuckets,
+    }),
+    [debouncedSearch, page, pageSize, isActive, appliedFilters],
   );
 
   const { data, isLoading, isFetching, error } = useVendorsList(listParams);
+  const { data: activeCountData } = useVendorsList({ isActive: true, page: 1, pageSize: 1 });
+  const { data: inactiveCountData } = useVendorsList({ isActive: false, page: 1, pageSize: 1 });
   const rows = data?.items ?? [];
   const totalCount = data?.totalCount ?? 0;
+  const activeCount = activeCountData?.totalCount ?? 0;
+  const inactiveCount = inactiveCountData?.totalCount ?? 0;
+  const globalCount = activeCount + inactiveCount;
+
+  const jobBucketLabels = useMemo(
+    () => new Map((facets?.jobBuckets ?? []).map((bucket) => [bucket.id, bucket.label])),
+    [facets],
+  );
+  const appliedChips = useMemo(
+    () => describeChips(appliedFilters, jobBucketLabels),
+    [appliedFilters, jobBucketLabels],
+  );
+
+  const handleApplyFilters = (next: VendorFilters) => {
+    setAppliedFilters(next);
+    setPage(0);
+  };
+
+  const handleClearFilters = () => {
+    setAppliedFilters(emptyVendorFilters);
+    setPage(0);
+  };
+
+  const handleRemoveChip = (chip: AppliedChip) => {
+    setAppliedFilters((current) => ({
+      ...current,
+      [chip.category]: current[chip.category].filter((value) => value !== chip.value),
+    }));
+    setPage(0);
+  };
+
+  const openDetail = (row: VendorListItem, mode: "view" | "edit") => {
+    setDetailTarget(row);
+    setDetailMode(mode);
+  };
+
+  const closeDetail = () => {
+    setDetailTarget(null);
+    setDetailMode("view");
+  };
+
+  const openDeactivation = (row: VendorListItem) => {
+    setDeleteTarget(row);
+    setDeleteError(null);
+  };
+
+  const closeDeactivation = () => {
+    setDeleteTarget(null);
+    setDeleteError(null);
+  };
 
   const handleDeleteConfirm = () => {
     if (!deleteTarget) return;
-    deleteVendor.mutate(deleteTarget.id, { onSuccess: () => setDeleteTarget(null) });
+    setDeleteError(null);
+    deleteVendor.mutate(deleteTarget.id, {
+      onSuccess: () => {
+        setDeleteTarget(null);
+      },
+      onError: (error: Error) => {
+        setDeleteError(error.message || "Failed to deactivate vendor");
+      },
+    });
   };
 
+  const stopAnd = (handler: () => void) => (event: MouseEvent) => {
+    event.stopPropagation();
+    handler();
+  };
+
+  const handleRowKeyDown = (row: VendorListItem) => (event: KeyboardEvent) => {
+    if (event.key !== "Enter" && event.key !== " ") return;
+    event.preventDefault();
+    event.stopPropagation();
+    openDetail(row, "view");
+  };
+
+  const showLoadingRow = isLoading;
+  const showEmptyRow = !isLoading && !error && rows.length === 0;
+
   return (
     <Box className="flex flex-col gap-4 p-4">
       <Stack
@@ -66,23 +226,12 @@ export default function VendorsListPage() {
           justifyContent: "space-between",
         }}
       >
-        <Stack
-          direction="row"
-          spacing={2}
-          sx={{
-            alignItems: "baseline",
-          }}
-        >
+        <Stack direction="row" spacing={2} sx={{ alignItems: "baseline" }}>
           <Typography variant="h5" component="h1">
-            Vendors
+            Vendors / Technicians
           </Typography>
-          <Typography
-            variant="body2"
-            sx={{
-              color: "text.secondary",
-            }}
-          >
-            {totalCount} total
+          <Typography variant="body2" sx={{ color: "text.secondary" }}>
+            {globalCount} technicians · {activeCount} active
           </Typography>
           {isFetching && !isLoading && <CircularProgress size={16} />}
         </Stack>
@@ -90,9 +239,7 @@ export default function VendorsListPage() {
         <Stack
           direction={{ xs: "column", sm: "row" }}
           spacing={2}
-          sx={{
-            alignItems: "center",
-          }}
+          sx={{ alignItems: { xs: "stretch", sm: "center" } }}
         >
           <TextField
             size="small"
@@ -101,133 +248,362 @@ export default function VendorsListPage() {
               setSearch(e.target.value);
               setPage(0);
             }}
-            placeholder="Search vendors..."
-            className="min-w-sidebar"
+            placeholder="Search name, company, trade..."
+            className="min-w-[260px]"
           />
-          <Button variant="contained" onClick={() => navigate("/vendors/new")}>
-            + New Vendor
+          <Button
+            variant="outlined"
+            onClick={() => setFiltersOpen(true)}
+            startIcon={<FilterListIcon />}
+            aria-label="Open vendor filters"
+          >
+            Filters
+            {appliedChips.length > 0 && (
+              <Chip size="small" color="primary" label={appliedChips.length} sx={{ ml: 1 }} />
+            )}
+          </Button>
+          <Button variant="contained" onClick={() => setCreateOpen(true)}>
+            + Add Vendor
           </Button>
         </Stack>
       </Stack>
-      {error && (
+
+      <Tabs
+        value={isActive ? "active" : "inactive"}
+        onChange={(_event, value: "active" | "inactive") => {
+          setIsActive(value === "active");
+          setPage(0);
+        }}
+        aria-label="Vendor status"
+      >
+        <Tab value="active" label={`Active (${activeCount})`} />
+        <Tab value="inactive" label={`Inactive (${inactiveCount})`} />
+      </Tabs>
+
+      {appliedChips.length > 0 && (
+        <Stack direction="row" spacing={1} className="flex flex-wrap items-center">
+          <Typography variant="caption" sx={{ color: "text.secondary" }}>
+            Applied:
+          </Typography>
+          {appliedChips.map((chip) => (
+            <Chip
+              key={`${chip.category}-${chip.value}`}
+              size="small"
+              label={chip.label}
+              onDelete={() => handleRemoveChip(chip)}
+              aria-label={`Remove filter ${chip.label}`}
+            />
+          ))}
+          <Button size="small" onClick={handleClearFilters}>
+            Clear all
+          </Button>
+        </Stack>
+      )}
+
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load vendors"}
         </Alert>
       )}
-      <TableContainer component={Paper} variant="outlined">
-        <Table size="small">
+
+      <TableContainer component={Paper} variant="outlined" sx={{ overflowX: "auto" }}>
+        <Table size="small" sx={{ minWidth: 960 }}>
           <TableHead>
             <TableRow>
-              <TableCell className="font-semibold">Company</TableCell>
-              <TableCell className="font-semibold">Contact</TableCell>
-              <TableCell className="font-semibold">Email</TableCell>
-              <TableCell className="font-semibold">Phone</TableCell>
-              <TableCell className="font-semibold">Trades</TableCell>
-              <TableCell className="font-semibold">Status</TableCell>
-              <TableCell align="right" className="font-semibold">
-                Actions
-              </TableCell>
+              {TABLE_COLUMNS.map((column) => (
+                <TableCell
+                  key={column}
+                  align={column === "View" || column === "Edit" ? "center" : "left"}
+                  className="font-semibold"
+                >
+                  {column}
+                </TableCell>
+              ))}
             </TableRow>
           </TableHead>
           <TableBody>
-            {isLoading ? (
+            {showLoadingRow ? (
               <TableRow>
-                <TableCell colSpan={7} align="center" className="py-10">
+                <TableCell colSpan={TABLE_COLUMNS.length} align="center" className="py-10">
                   <CircularProgress size={28} />
                 </TableCell>
               </TableRow>
-            ) : rows.length === 0 ? (
+            ) : showEmptyRow ? (
               <TableRow>
-                <TableCell colSpan={7} align="center" className="py-10">
-                  <Typography
-                    sx={{
-                      color: "text.secondary",
-                    }}
-                  >
-                    No vendors found
+                <TableCell colSpan={TABLE_COLUMNS.length} align="center" className="py-10">
+                  <Typography sx={{ color: "text.secondary" }}>
+                    No vendors match the current filters.
                   </Typography>
                 </TableCell>
               </TableRow>
             ) : (
-              rows.map((row) => (
-                <TableRow key={String(row.id)} hover>
-                  <TableCell>
-                    <Button
-                      variant="text"
-                      size="small"
-                      className="font-semibold"
-                      onClick={() => navigate(`/vendors/edit/${row.id}`)}
-                    >
-                      {row.companyName || "—"}
-                    </Button>
-                  </TableCell>
-                  <TableCell>{row.contactName || "—"}</TableCell>
-                  <TableCell>{row.email || "—"}</TableCell>
-                  <TableCell>{row.phone || "—"}</TableCell>
-                  <TableCell>{row.tradeSpecialties || "—"}</TableCell>
-                  <TableCell>
-                    <Chip
-                      size="small"
-                      label={row.isActive ? "Active" : "Inactive"}
-                      color={row.isActive ? "success" : "default"}
-                    />
-                  </TableCell>
-                  <TableCell align="right">
-                    <Tooltip title="Edit">
-                      <IconButton
+              rows.map((row) => {
+                const trades = splitTrades(row.tradeSpecialties);
+                const primaryTrade = trades[0] ?? "—";
+                const extraTrades = trades.length > 1 ? trades.length - 1 : 0;
+                const locationText = [row.city, row.state].filter(Boolean).join(", ") || "—";
+                return (
+                  <TableRow
+                    key={String(row.id)}
+                    hover
+                    tabIndex={0}
+                    role="button"
+                    aria-label={`Open vendor details for ${row.companyName}`}
+                    sx={{ cursor: "pointer" }}
+                    onClick={() => openDetail(row, "view")}
+                    onKeyDown={handleRowKeyDown(row)}
+                  >
+                    <TableCell>
+                      <Typography className="font-semibold">{row.companyName || "—"}</Typography>
+                    </TableCell>
+                    <TableCell>
+                      <Stack direction="row" spacing={1.5} sx={{ alignItems: "center" }}>
+                        <Avatar
+                          sx={{
+                            width: 28,
+                            height: 28,
+                            fontSize: 12,
+                            backgroundColor: "var(--accent, #1976d2)",
+                          }}
+                        >
+                          {getInitials(row.contactName)}
+                        </Avatar>
+                        <Typography variant="body2">{row.contactName || "—"}</Typography>
+                      </Stack>
+                    </TableCell>
+                    <TableCell>{locationText}</TableCell>
+                    <TableCell>
+                      {primaryTrade === "—" ? (
+                        "—"
+                      ) : (
+                        <Stack direction="row" spacing={0.5} sx={{ alignItems: "center" }}>
+                          <span>{primaryTrade}</span>
+                          {extraTrades > 0 && <Chip size="small" label={`+${extraTrades}`} />}
+                        </Stack>
+                      )}
+                    </TableCell>
+                    <TableCell>
+                      {row.phone ? (
+                        <Link
+                          href={`tel:${row.phone}`}
+                          underline="hover"
+                          onClick={(event) => event.stopPropagation()}
+                        >
+                          {row.phone}
+                        </Link>
+                      ) : (
+                        "—"
+                      )}
+                    </TableCell>
+                    <TableCell>
+                      {row.email ? (
+                        <Link
+                          href={`mailto:${row.email}`}
+                          underline="hover"
+                          onClick={(event) => event.stopPropagation()}
+                        >
+                          {row.email}
+                        </Link>
+                      ) : (
+                        "—"
+                      )}
+                    </TableCell>
+                    <TableCell>{row.totalJobs ?? 0}</TableCell>
+                    <TableCell>
+                      <Chip
                         size="small"
-                        aria-label="Edit vendor"
-                        onClick={() => navigate(`/vendors/edit/${row.id}`)}
+                        label={row.isActive ? "Active" : "Inactive"}
+                        color={row.isActive ? "success" : "default"}
+                      />
+                    </TableCell>
+                    <TableCell align="center">
+                      <Tooltip title="View details">
+                        <IconButton
+                          size="small"
+                          aria-label={`View vendor ${row.companyName}`}
+                          onClick={stopAnd(() => openDetail(row, "view"))}
+                        >
+                          <VisibilityOutlinedIcon fontSize="small" />
+                        </IconButton>
+                      </Tooltip>
+                    </TableCell>
+                    <TableCell align="center">
+                      <Stack
+                        direction="row"
+                        spacing={0.5}
+                        sx={{ alignItems: "center", justifyContent: "center" }}
                       >
-                        <EditOutlinedIcon fontSize="small" />
-                      </IconButton>
-                    </Tooltip>
-                    <Tooltip title="Delete">
-                      <IconButton
-                        size="small"
-                        aria-label="Delete vendor"
-                        onClick={() => setDeleteTarget(row)}
-                      >
-                        <DeleteOutlineIcon fontSize="small" />
-                      </IconButton>
-                    </Tooltip>
-                  </TableCell>
-                </TableRow>
-              ))
+                        <Tooltip title="Edit">
+                          <IconButton
+                            size="small"
+                            aria-label={`Edit vendor ${row.companyName}`}
+                            onClick={stopAnd(() => openDetail(row, "edit"))}
+                          >
+                            <EditOutlinedIcon fontSize="small" />
+                          </IconButton>
+                        </Tooltip>
+                        {row.isActive && (
+                          <Tooltip title="Deactivate">
+                            <IconButton
+                              size="small"
+                              aria-label="Deactivate vendor"
+                              onClick={stopAnd(() => openDeactivation(row))}
+                            >
+                              <DeleteOutlineIcon fontSize="small" />
+                            </IconButton>
+                          </Tooltip>
+                        )}
+                      </Stack>
+                    </TableCell>
+                  </TableRow>
+                );
+              })
             )}
           </TableBody>
         </Table>
       </TableContainer>
-      <TablePagination
-        component="div"
-        count={totalCount}
-        page={page}
-        onPageChange={(_e, nextPage) => setPage(nextPage)}
-        rowsPerPage={pageSize}
-        onRowsPerPageChange={(e) => {
-          setPageSize(Number(e.target.value));
-          setPage(0);
+
+      <Stack
+        direction={{ xs: "column", sm: "row" }}
+        spacing={2}
+        sx={{
+          alignItems: { xs: "stretch", sm: "center" },
+          justifyContent: "space-between",
         }}
-        rowsPerPageOptions={[12, 24, 48]}
+      >
+        <Typography variant="body2" sx={{ color: "text.secondary" }}>
+          {totalCount} {isActive ? "active" : "inactive"}{" "}
+          {totalCount === 1 ? "technician" : "technicians"}
+          {(appliedChips.length > 0 || Boolean(debouncedSearch)) && " · filtered"}
+          {` · ${activeCount} active · ${inactiveCount} inactive`}
+        </Typography>
+        <TablePagination
+          component="div"
+          count={totalCount}
+          page={page}
+          onPageChange={(_e, nextPage) => setPage(nextPage)}
+          rowsPerPage={pageSize}
+          onRowsPerPageChange={(e) => {
+            setPageSize(Number(e.target.value));
+            setPage(0);
+          }}
+          rowsPerPageOptions={[12, 24, 48]}
+        />
+      </Stack>
+
+      <VendorCreateModal
+        open={createOpen}
+        onClose={() => setCreateOpen(false)}
+        tradeOptions={tradeOptions}
       />
-      <Dialog open={Boolean(deleteTarget)} onClose={() => setDeleteTarget(null)}>
-        <DialogTitle>Delete Vendor</DialogTitle>
+
+      <VendorFiltersDrawer
+        open={filtersOpen}
+        onClose={() => setFiltersOpen(false)}
+        facets={facets}
+        appliedFilters={appliedFilters}
+        onApply={handleApplyFilters}
+      />
+
+      <VendorDetailDrawer
+        open={Boolean(detailTarget)}
+        vendor={detailTarget}
+        mode={detailMode}
+        onClose={closeDetail}
+        onModeChange={setDetailMode}
+        tradeOptions={tradeOptions}
+      />
+
+      <Dialog
+        open={Boolean(deleteTarget)}
+        onClose={deleteVendor.isPending ? undefined : closeDeactivation}
+      >
+        <DialogTitle>Deactivate Vendor</DialogTitle>
         <DialogContent>
-          <DialogContentText>
-            Are you sure you want to delete &quot;{deleteTarget?.companyName}&quot;?
-          </DialogContentText>
+          <Stack spacing={2}>
+            <DialogContentText>
+              Deactivate &quot;{deleteTarget?.companyName}&quot;? Existing work-order and audit
+              history will be preserved.
+            </DialogContentText>
+
+            {isLoadingImpact && (
+              <Stack direction="row" spacing={1} sx={{ alignItems: "center" }}>
+                <CircularProgress size={16} />
+                <Typography variant="body2" sx={{ color: "text.secondary" }}>
+                  Checking linked work orders...
+                </Typography>
+              </Stack>
+            )}
+
+            {Boolean(impactError) && !isLoadingImpact && (
+              <Alert severity="warning">
+                Could not verify linked work orders. Close and try again.
+              </Alert>
+            )}
+
+            {deactivationImpact != null &&
+              !isLoadingImpact &&
+              !deactivationImpact.canDeactivate && (
+                <Alert severity="error">
+                  This vendor cannot be deactivated because it still has open work orders.
+                </Alert>
+              )}
+
+            {deactivationImpact != null && deactivationImpact.openWorkOrders.length > 0 && (
+              <Box>
+                <Typography variant="subtitle2" className="font-semibold uppercase">
+                  Open work orders ({deactivationImpact.openWorkOrders.length})
+                </Typography>
+                <List dense sx={{ mt: 0.5 }}>
+                  {deactivationImpact.openWorkOrders.map((wo) => (
+                    <ListItem
+                      key={String(wo.workOrderId)}
+                      sx={{ px: 0, py: 0.25 }}
+                      secondaryAction={
+                        wo.scheduledDate ? (
+                          <Typography variant="caption" sx={{ color: "text.secondary" }}>
+                            {wo.scheduledDate}
+                          </Typography>
+                        ) : undefined
+                      }
+                    >
+                      <Stack>
+                        <Typography variant="body2">
+                          {wo.workOrderNumber
+                            ? `${wo.workOrderNumber} — ${wo.workOrderTitle || "Untitled"}`
+                            : wo.workOrderTitle || `Work order ${wo.workOrderId}`}
+                        </Typography>
+                        {Boolean(wo.status) && (
+                          <Typography variant="caption" sx={{ color: "text.secondary" }}>
+                            {wo.status}
+                          </Typography>
+                        )}
+                      </Stack>
+                    </ListItem>
+                  ))}
+                </List>
+              </Box>
+            )}
+
+            {Boolean(deleteError) && <Alert severity="error">{deleteError}</Alert>}
+          </Stack>
         </DialogContent>
         <DialogActions>
-          <Button onClick={() => setDeleteTarget(null)} disabled={deleteVendor.isPending}>
+          <Button onClick={closeDeactivation} disabled={deleteVendor.isPending}>
             Cancel
           </Button>
           <Button
             color="error"
             variant="contained"
             onClick={handleDeleteConfirm}
-            disabled={deleteVendor.isPending}
+            disabled={
+              deleteVendor.isPending ||
+              isLoadingImpact ||
+              Boolean(deactivationImpact && !deactivationImpact.canDeactivate) ||
+              Boolean(impactError)
+            }
           >
-            {deleteVendor.isPending ? "Deleting..." : "Delete"}
+            {deleteVendor.isPending ? "Deactivating..." : "Deactivate"}
           </Button>
         </DialogActions>
       </Dialog>
diff --git a/src/app/(protected)/workorders/[id].tsx b/src/app/(protected)/workorders/[id].tsx
index fb4d999f..f7350669 100644
--- a/src/app/(protected)/workorders/[id].tsx
+++ b/src/app/(protected)/workorders/[id].tsx
@@ -10,6 +10,10 @@ import {
   Button,
   Chip,
   CircularProgress,
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogTitle,
   Link,
   Menu,
   MenuItem,
@@ -36,8 +40,11 @@ import {
   useAddWorkOrderComment,
   useChangeWorkOrderAssignment,
   useChangeWorkOrderStatus,
+  useUpdateWorkOrderVendor,
 } from "@/domain/work-orders/use-cases/use-work-order-mutations";
 import { useWorkOrderUsers } from "@/domain/work-orders/use-cases/use-work-orders-list";
+import { vendorsApi } from "@/domain/vendors/api/vendors-api";
+import type { VendorPreferredContact } from "@/domain/vendors/types/vendor";
 import { formatDateTime, timeSince, waitTimeColor } from "@/lib/time-utils";
 
 const STATUS_COLORS: Record<
@@ -53,6 +60,31 @@ const STATUS_COLORS: Record<
 
 type ActivityTab = "customer" | "internal" | "audit";
 
+interface VendorEditorState {
+  vendorId: string | number;
+  vendorName: string;
+  contactName: string;
+  preferredContact: VendorPreferredContact;
+  phone: string;
+  email: string;
+  notes: string;
+}
+
+function formatPhoneMask(input: string): string {
+  const digits = input.replace(/\D/g, "").slice(0, 10);
+  if (digits.length <= 3) return digits;
+  if (digits.length <= 6) return `(${digits.slice(0, 3)}) ${digits.slice(3)}`;
+  return `(${digits.slice(0, 3)}) ${digits.slice(3, 6)}-${digits.slice(6)}`;
+}
+
+function isVendorEditorValid(editor: VendorEditorState): boolean {
+  const phoneValid = editor.phone === "" || /^\(\d{3}\) \d{3}-\d{4}$/.test(editor.phone);
+  const emailValid = editor.email === "" || /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(editor.email);
+  return (
+    phoneValid && emailValid && editor.notes.length <= 2000 && editor.contactName.length <= 200
+  );
+}
+
 function CommentTimeline({ comments }: { comments: WorkOrderComment[] }) {
   const sorted = useMemo(
     () =>
@@ -167,6 +199,7 @@ export default function WorkOrderViewPage() {
   const statusMutation = useChangeWorkOrderStatus(workOrderId);
   const assignmentMutation = useChangeWorkOrderAssignment(workOrderId);
   const commentMutation = useAddWorkOrderComment(workOrderId);
+  const vendorMutation = useUpdateWorkOrderVendor(workOrderId);
 
   const [activeTab, setActiveTab] = useState<ActivityTab>("customer");
   const [commentText, setCommentText] = useState("");
@@ -174,6 +207,9 @@ export default function WorkOrderViewPage() {
   const [dispatchDetailId, setDispatchDetailId] = useState<string | number | null>(null);
   const [statusAnchor, setStatusAnchor] = useState<HTMLElement | null>(null);
   const [assignAnchor, setAssignAnchor] = useState<HTMLElement | null>(null);
+  const [vendorEditor, setVendorEditor] = useState<VendorEditorState | null>(null);
+  const [vendorEditorLoading, setVendorEditorLoading] = useState(false);
+  const [vendorEditorError, setVendorEditorError] = useState("");
 
   const customerComments = useMemo(
     () => (wo?.comments ?? []).filter((comment) => comment.commentType === "customer"),
@@ -200,6 +236,74 @@ export default function WorkOrderViewPage() {
     );
   };
 
+  const openVendorEditor = async (
+    event: React.MouseEvent,
+    vendorId: string | number,
+    vendorName: string,
+  ) => {
+    event.stopPropagation();
+    setVendorEditorError("");
+    setVendorEditorLoading(true);
+    setVendorEditor({
+      vendorId,
+      vendorName,
+      contactName: "",
+      preferredContact: "Phone",
+      phone: "",
+      email: "",
+      notes: "",
+    });
+
+    try {
+      const vendor = await vendorsApi.getById(vendorId);
+      setVendorEditor({
+        vendorId,
+        vendorName: vendor.companyName || vendorName,
+        contactName: vendor.contactName,
+        preferredContact: vendor.preferredContact,
+        phone: vendor.phone,
+        email: vendor.email,
+        notes: vendor.notes,
+      });
+    } catch (vendorError) {
+      setVendorEditorError(
+        vendorError instanceof Error ? vendorError.message : "Unable to load vendor details",
+      );
+    } finally {
+      setVendorEditorLoading(false);
+    }
+  };
+
+  const saveVendorEditor = () => {
+    if (!vendorEditor || !isVendorEditorValid(vendorEditor)) return;
+    const numericWorkOrderId = Number(workOrderId);
+    if (!Number.isInteger(numericWorkOrderId) || numericWorkOrderId <= 0) {
+      setVendorEditorError("A valid work order is required");
+      return;
+    }
+
+    vendorMutation.mutate(
+      {
+        vendorId: vendorEditor.vendorId,
+        payload: {
+          workOrderId: numericWorkOrderId,
+          contactName: vendorEditor.contactName.trim(),
+          preferredContact: vendorEditor.preferredContact,
+          phone: vendorEditor.phone,
+          email: vendorEditor.email.trim(),
+          notes: vendorEditor.notes.trim(),
+        },
+      },
+      {
+        onSuccess: () => {
+          setVendorEditor(null);
+          void refetch();
+        },
+        onError: (vendorError) => setVendorEditorError(vendorError.message),
+      },
+    );
+  };
+
   if (isLoading) {
     return (
       <Box className="flex justify-center p-12">
@@ -426,6 +530,7 @@ export default function WorkOrderViewPage() {
                     <TableCell>Status</TableCell>
                     <TableCell>Date</TableCell>
                     <TableCell>Wait</TableCell>
+                    <TableCell align="right">Actions</TableCell>
                   </TableRow>
                 </TableHead>
                 <TableBody>
@@ -465,6 +570,17 @@ export default function WorkOrderViewPage() {
                             "—"
                           )}
                         </TableCell>
+                        <TableCell align="right">
+                          <Button
+                            size="small"
+                            onClick={(event) =>
+                              void openVendorEditor(event, dispatch.vendorId, dispatch.vendorName)
+                            }
+                            disabled={dispatch.vendorId === ""}
+                          >
+                            Edit vendor
+                          </Button>
+                        </TableCell>
                       </TableRow>
                     );
                   })}
@@ -542,7 +658,7 @@ export default function WorkOrderViewPage() {
           onDispatched={() => void refetch()}
         />
       )}
-      {dispatchDetailId && (
+      {dispatchDetailId != null && (
         <DispatchDetailModal
           dispatchId={dispatchDetailId}
           workOrderId={workOrderId}
@@ -550,6 +666,115 @@ export default function WorkOrderViewPage() {
           onUpdated={() => void refetch()}
         />
       )}
+      <Dialog
+        open={vendorEditor !== null}
+        onClose={() => {
+          if (!vendorMutation.isPending) setVendorEditor(null);
+        }}
+        fullWidth
+        maxWidth="sm"
+      >
+        <DialogTitle>Edit assigned vendor</DialogTitle>
+        <DialogContent>
+          <Stack spacing={2} className="pt-2">
+            <Typography variant="body2" color="text.secondary">
+              {vendorEditor?.vendorName}
+            </Typography>
+            {Boolean(vendorEditorError) && <Alert severity="error">{vendorEditorError}</Alert>}
+            {vendorEditorLoading ? (
+              <Box className="flex justify-center p-6">
+                <CircularProgress size={28} />
+              </Box>
+            ) : (
+              <>
+                <TextField
+                  label="Technician name"
+                  value={vendorEditor?.contactName ?? ""}
+                  onChange={(event) =>
+                    setVendorEditor((current) =>
+                      current ? { ...current, contactName: event.target.value } : current,
+                    )
+                  }
+                  slotProps={{ htmlInput: { maxLength: 200 } }}
+                />
+                <TextField
+                  select
+                  label="Preferred contact"
+                  value={vendorEditor?.preferredContact ?? "Phone"}
+                  onChange={(event) =>
+                    setVendorEditor((current) =>
+                      current
+                        ? {
+                            ...current,
+                            preferredContact: event.target.value as VendorPreferredContact,
+                          }
+                        : current,
+                    )
+                  }
+                >
+                  <MenuItem value="Phone">Phone</MenuItem>
+                  <MenuItem value="Email">Email</MenuItem>
+                  <MenuItem value="Text">Text</MenuItem>
+                </TextField>
+                <TextField
+                  label="Phone"
+                  value={vendorEditor?.phone ?? ""}
+                  onChange={(event) =>
+                    setVendorEditor((current) =>
+                      current
+                        ? { ...current, phone: formatPhoneMask(event.target.value) }
+                        : current,
+                    )
+                  }
+                  error={Boolean(
+                    vendorEditor?.phone && !/^\(\d{3}\) \d{3}-\d{4}$/.test(vendorEditor.phone),
+                  )}
+                  helperText="Use (XXX) XXX-XXXX"
+                />
+                <TextField
+                  label="Email"
+                  type="email"
+                  value={vendorEditor?.email ?? ""}
+                  onChange={(event) =>
+                    setVendorEditor((current) =>
+                      current ? { ...current, email: event.target.value } : current,
+                    )
+                  }
+                />
+                <TextField
+                  label="Notes"
+                  multiline
+                  minRows={3}
+                  value={vendorEditor?.notes ?? ""}
+                  onChange={(event) =>
+                    setVendorEditor((current) =>
+                      current ? { ...current, notes: event.target.value } : current,
+                    )
+                  }
+                  slotProps={{ htmlInput: { maxLength: 2000 } }}
+                />
+              </>
+            )}
+          </Stack>
+        </DialogContent>
+        <DialogActions>
+          <Button onClick={() => setVendorEditor(null)} disabled={vendorMutation.isPending}>
+            Cancel
+          </Button>
+          <Button
+            variant="contained"
+            onClick={saveVendorEditor}
+            disabled={
+              !vendorEditor ||
+              vendorEditorLoading ||
+              vendorMutation.isPending ||
+              !isVendorEditorValid(vendorEditor)
+            }
+          >
+            {vendorMutation.isPending ? "Saving..." : "Save"}
+          </Button>
+        </DialogActions>
+      </Dialog>
     </Box>
   );
 }
diff --git a/src/app/(protected)/workorders/_components/dispatch-create-modal.tsx b/src/app/(protected)/workorders/_components/dispatch-create-modal.tsx
index 5dd6952a..b7ab376c 100644
--- a/src/app/(protected)/workorders/_components/dispatch-create-modal.tsx
+++ b/src/app/(protected)/workorders/_components/dispatch-create-modal.tsx
@@ -242,7 +242,7 @@ export function DispatchCreateModal({
                     <Typography variant="body2" className="font-semibold">
                       {vendor.companyName}
                     </Typography>
-                    {vendor.tradeSpecialties && (
+                    {Boolean(vendor.tradeSpecialties) && (
                       <Typography
                         variant="caption"
                         sx={{
@@ -253,7 +253,7 @@ export function DispatchCreateModal({
                         {vendor.tradeSpecialties}
                       </Typography>
                     )}
-                    {vendor.address && (
+                    {Boolean(vendor.address) && (
                       <Typography
                         variant="caption"
                         sx={{
diff --git a/src/app/(protected)/workorders/_components/dispatch-detail-modal.tsx b/src/app/(protected)/workorders/_components/dispatch-detail-modal.tsx
index c68475e9..7bcd4a9b 100644
--- a/src/app/(protected)/workorders/_components/dispatch-detail-modal.tsx
+++ b/src/app/(protected)/workorders/_components/dispatch-detail-modal.tsx
@@ -331,7 +331,7 @@ export function DispatchDetailModal({
                   }
                 />
                 <DetailField label="Vendor Email" value={dispatch.vendorEmail || "—"} />
-                {dispatch.description && (
+                {Boolean(dispatch.description) && (
                   <DetailField
                     label="Description"
                     value={dispatch.description}
@@ -448,7 +448,7 @@ export function DispatchDetailModal({
                     <Typography variant="subtitle2">{type}</Typography>
                     {signoff ? (
                       <Box className="mt-2">
-                        {signoff.signatureMethod === "drawn" && signoff.signature && (
+                        {signoff.signatureMethod === "drawn" && Boolean(signoff.signature) && (
                           <img
                             src={signoff.signature}
                             alt="Signature"
@@ -527,12 +527,12 @@ export function DispatchDetailModal({
                           {Number(uplift.delta).toFixed(2)})
                         </Typography>
                       </Stack>
-                      {uplift.vendorReason && (
+                      {Boolean(uplift.vendorReason) && (
                         <Typography variant="body2" className="mt-1">
                           <strong>Reason:</strong> {uplift.vendorReason}
                         </Typography>
                       )}
-                      {(uplift.requestedByVendorName || uplift.requestedAt) && (
+                      {Boolean(uplift.requestedByVendorName || uplift.requestedAt) && (
                         <Typography
                           variant="body2"
                           className="mt-1"
@@ -545,9 +545,11 @@ export function DispatchDetailModal({
                         </Typography>
                       )}
                       {uplift.status !== "Pending" &&
-                        (uplift.decidedByName || uplift.decidedAt || uplift.decisionNote) && (
+                        Boolean(
+                          uplift.decidedByName || uplift.decidedAt || uplift.decisionNote,
+                        ) && (
                           <Box className="mt-1">
-                            {(uplift.decidedByName || uplift.decidedAt) && (
+                            {Boolean(uplift.decidedByName || uplift.decidedAt) && (
                               <Typography
                                 variant="body2"
                                 sx={{
@@ -558,7 +560,7 @@ export function DispatchDetailModal({
                                 {uplift.decidedAt ? ` · ${formatDateTime(uplift.decidedAt)}` : ""}
                               </Typography>
                             )}
-                            {uplift.decisionNote && (
+                            {Boolean(uplift.decisionNote) && (
                               <Typography variant="body2" className="mt-0.5">
                                 <strong>Note:</strong> {uplift.decisionNote}
                               </Typography>
@@ -720,7 +722,7 @@ export function DispatchDetailModal({
           )}
         </DialogContent>
       </Dialog>
-      {sigCaptureType && (
+      {sigCaptureType != null && (
         <SignatureCapture
           title={`${sigCaptureType} Sign-off`}
           onClose={() => setSigCaptureType(null)}
diff --git a/src/app/(protected)/workorders/_components/list/filter-bar/dispatcher-filter.tsx b/src/app/(protected)/workorders/_components/list/filter-bar/dispatcher-filter.tsx
index 9e85a9ac..a86e37f5 100644
--- a/src/app/(protected)/workorders/_components/list/filter-bar/dispatcher-filter.tsx
+++ b/src/app/(protected)/workorders/_components/list/filter-bar/dispatcher-filter.tsx
@@ -128,7 +128,7 @@ export function DispatcherFilter({
           onClick={() => onChange(new Set())}
         />
 
-        {meId && (
+        {meId != null && (
           <CheckboxMenuItem
             checked={meOnly}
             label="My WOs only"
diff --git a/src/app/(protected)/workorders/_components/media/media-upload-modal.tsx b/src/app/(protected)/workorders/_components/media/media-upload-modal.tsx
index 921e7d21..779bdb28 100644
--- a/src/app/(protected)/workorders/_components/media/media-upload-modal.tsx
+++ b/src/app/(protected)/workorders/_components/media/media-upload-modal.tsx
@@ -3,6 +3,7 @@ import { Dialog, DialogContent, DialogTitle } from "@mui/material";
 import { Image as ImageIcon } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { dialogBlurBackdropSlotProps } from "@/components/ui/dialog-blur-backdrop";
+import { Text } from "@/components/ui/text";
 import type { MediaFile } from "@/domain/work-orders/types/work-order-media";
 import type { WorkOrderTableRow } from "@/domain/work-orders/types/work-order-table-row";
 import { MediaUploader } from "./media-uploader";
@@ -43,7 +44,9 @@ export function MediaUploadModal({
           </DialogTitle>
           <span style={{ fontSize: 12, color: "var(--color-text-muted)" }}>#{row.woNumber}</span>
         </div>
-        <p className="sr-only">Upload photos and videos for this work order.</p>
+        <Text className="sr-only" variant="description">
+          Upload photos and videos for this work order.
+        </Text>
 
         <div className="mt-4">
           <MediaUploader uploads={uploads} onChange={onChange} />
diff --git a/src/app/(protected)/workorders/index.tsx b/src/app/(protected)/workorders/index.tsx
index dd5b0df8..d45464c5 100644
--- a/src/app/(protected)/workorders/index.tsx
+++ b/src/app/(protected)/workorders/index.tsx
@@ -219,7 +219,7 @@ export default function WorkOrdersListPage() {
           </Select>
         </FormControl>
       </Stack>
-      {error && (
+      {Boolean(error) && (
         <Alert severity="error">
           {error instanceof Error ? error.message : "Failed to load work orders"}
         </Alert>
diff --git a/src/app/v/[token]/_layout.tsx b/src/app/v/[token]/_layout.tsx
index 548f4ed3..cd3bb545 100644
--- a/src/app/v/[token]/_layout.tsx
+++ b/src/app/v/[token]/_layout.tsx
@@ -1,6 +1,7 @@
 import { NavLink, Outlet, useLocation, useParams } from "react-router";
 import { useVendorPortal } from "@/app/v/_components/vendor-portal-context";
 import { VendorPortalProvider } from "@/app/v/_components/vendor-portal-provider";
+import { Text } from "@/components/ui/text";
 import "@/app/v/_components/vendor-portal.css";
 
 function VendorPortalHeader() {
@@ -9,7 +10,7 @@ function VendorPortalHeader() {
   return (
     <div className="vp-header">
       <div className="vp-brand">Sea Haven Industries — Vendor Portal</div>
-      {status === "ready" && vendor?.companyName && (
+      {status === "ready" && vendor != null && Boolean(vendor.companyName) && (
         <div className="vp-vendor-name">{vendor.companyName}</div>
       )}
     </div>
@@ -55,13 +56,13 @@ function VendorPortalBody() {
   if (status === "error") {
     return (
       <div className="vp-container">
-        <div className="vp-error">
-          <h2>Access Denied</h2>
-          <p>
+        <Text as="section" variant="body" className="vp-error">
+          <Text variant="title">Access Denied</Text>
+          <Text variant="error">
             {error?.message ||
               "This link is invalid or has expired. Please contact your dispatcher for a new link."}
-          </p>
-        </div>
+          </Text>
+        </Text>
       </div>
     );
   }
diff --git a/src/app/v/[token]/dashboard.tsx b/src/app/v/[token]/dashboard.tsx
index a7dc74f9..eeb222a2 100644
--- a/src/app/v/[token]/dashboard.tsx
+++ b/src/app/v/[token]/dashboard.tsx
@@ -2,6 +2,7 @@ import { useMemo, useState } from "react";
 import { useNavigate } from "react-router";
 import { useQuery } from "@tanstack/react-query";
 import { useVendorPortal } from "@/app/v/_components/vendor-portal-context";
+import { Text } from "@/components/ui/text";
 import { vendorPortalApi } from "@/domain/vendor-portal/api/vendor-portal-api";
 import {
   formatVendorPortalDateTime,
@@ -54,7 +55,7 @@ export default function VendorPortalDashboardPage() {
   return (
     <>
       <div className="vp-card">
-        <h2>Your Work</h2>
+        <Text variant="title">Your Work</Text>
         <div className="vp-muted" style={{ marginBottom: 12 }}>
           Active dispatches and work orders assigned to your company.
         </div>
@@ -76,7 +77,9 @@ export default function VendorPortalDashboardPage() {
       </div>
 
       {isLoading && <div className="vp-card vp-muted">Loading dispatches…</div>}
-      {error && <div className="vp-error">{error.message}</div>}
+      <Text variant="error" when={Boolean(error)} className="vp-error">
+        {error?.message}
+      </Text>
 
       {!isLoading && !error && filtered.length === 0 && (
         <div className="vp-card vp-empty">No dispatches in this view.</div>
diff --git a/src/app/v/[token]/dispatch/[id].tsx b/src/app/v/[token]/dispatch/[id].tsx
index 2edae8a1..a7000843 100644
--- a/src/app/v/[token]/dispatch/[id].tsx
+++ b/src/app/v/[token]/dispatch/[id].tsx
@@ -3,6 +3,7 @@ import { Link, useParams } from "react-router";
 import { useQuery, useQueryClient } from "@tanstack/react-query";
 import { SignaturePad } from "@/app/v/_components/signature-pad";
 import { useVendorPortal } from "@/app/v/_components/vendor-portal-context";
+import { Text } from "@/components/ui/text";
 import { vendorPortalApi } from "@/domain/vendor-portal/api/vendor-portal-api";
 import {
   formatVendorPortalDateTime,
@@ -63,7 +64,7 @@ function ChecklistSection({
           <label htmlFor={`cl-${item.id}`} style={{ flex: 1 }}>
             {item.itemText}
           </label>
-          {item.isCompleted && item.completedAt && (
+          {item.isCompleted && Boolean(item.completedAt) && (
             <span className="vp-muted" style={{ fontSize: 12 }}>
               {formatVendorPortalDateTime(item.completedAt)}
             </span>
@@ -224,7 +225,7 @@ function UpliftRequestsSection({
               </span>
             </span>
           </div>
-          {request.vendorReason && (
+          {Boolean(request.vendorReason) && (
             <div className="vp-row">
               <strong>Reason</strong>
               <span>{request.vendorReason}</span>
@@ -429,7 +430,11 @@ export default function VendorPortalDispatchPage() {
   }
 
   if (error && !data) {
-    return <div className="vp-error">{error.message}</div>;
+    return (
+      <Text variant="error" className="vp-error">
+        {error.message}
+      </Text>
+    );
   }
 
   if (!data) return null;
@@ -457,20 +462,20 @@ export default function VendorPortalDispatchPage() {
       <div className="vp-card">
         <div style={{ display: "flex", justifyContent: "space-between", alignItems: "flex-start" }}>
           <div>
-            <h2>{data.dispatchNumber}</h2>
+            <Text variant="title">{data.dispatchNumber}</Text>
             <div className="vp-muted">{data.workOrder?.workerOrderTitle}</div>
           </div>
           <span className={vendorPortalStatusClass(data.status)}>{data.status}</span>
         </div>
 
         <div style={{ marginTop: 12 }}>
-          {data.workOrder?.internalWONumber && (
+          {data.workOrder != null && Boolean(data.workOrder.internalWONumber) && (
             <div className="vp-row">
               <strong>WO #</strong>
               <span>{data.workOrder.internalWONumber}</span>
             </div>
           )}
-          {data.poNumber && (
+          {Boolean(data.poNumber) && (
             <div className="vp-row">
               <strong>PO #</strong>
               <span>{data.poNumber}</span>
@@ -482,7 +487,7 @@ export default function VendorPortalDispatchPage() {
               <span>${Number(data.nteAmount).toFixed(2)}</span>
             </div>
           )}
-          {data.scheduledDate && (
+          {Boolean(data.scheduledDate) && (
             <div className="vp-row">
               <strong>Scheduled</strong>
               <span>{formatVendorPortalDateTime(data.scheduledDate)}</span>
@@ -490,9 +495,11 @@ export default function VendorPortalDispatchPage() {
           )}
         </div>
 
-        {data.location && (
+        {data.location != null && (
           <>
-            <h3 style={{ marginTop: 16 }}>Location</h3>
+            <Text variant="heading" sx={{ marginTop: 2 }}>
+              Location
+            </Text>
             <div>{data.location.name}</div>
             <div className="vp-muted">
               {[
@@ -507,9 +514,11 @@ export default function VendorPortalDispatchPage() {
           </>
         )}
 
-        {(data.description || data.workOrder?.description) && (
+        {Boolean(data.description || data.workOrder?.description) && (
           <>
-            <h3 style={{ marginTop: 16 }}>Description</h3>
+            <Text variant="heading" sx={{ marginTop: 2 }}>
+              Description
+            </Text>
             <div>{data.description || data.workOrder?.description}</div>
           </>
         )}
@@ -570,7 +579,7 @@ export default function VendorPortalDispatchPage() {
       </div>
 
       <div className="vp-card">
-        <h3>Checklist</h3>
+        <Text variant="heading">Checklist</Text>
         <ChecklistSection
           token={token}
           dispatchId={dispatchId}
@@ -588,7 +597,7 @@ export default function VendorPortalDispatchPage() {
       </div>
 
       <div className="vp-card">
-        <h3>NTE Uplift Requests</h3>
+        <Text variant="heading">NTE Uplift Requests</Text>
         <UpliftRequestsSection
           token={token}
           dispatchId={dispatchId}
@@ -600,7 +609,7 @@ export default function VendorPortalDispatchPage() {
       </div>
 
       <div className="vp-card">
-        <h3>Customer Signoff</h3>
+        <Text variant="heading">Customer Signoff</Text>
         <SignoffSection
           token={token}
           dispatchId={dispatchId}
@@ -612,7 +621,7 @@ export default function VendorPortalDispatchPage() {
       </div>
 
       <div className="vp-card">
-        <h3>Vendor Signoff</h3>
+        <Text variant="heading">Vendor Signoff</Text>
         <SignoffSection
           token={token}
           dispatchId={dispatchId}
@@ -624,7 +633,7 @@ export default function VendorPortalDispatchPage() {
       </div>
 
       <div className="vp-card">
-        <h3>Comments</h3>
+        <Text variant="heading">Comments</Text>
         <CommentsSection
           token={token}
           dispatchId={dispatchId}
diff --git a/src/app/v/[token]/pos.tsx b/src/app/v/[token]/pos.tsx
index b6e566de..bfa30e5f 100644
--- a/src/app/v/[token]/pos.tsx
+++ b/src/app/v/[token]/pos.tsx
@@ -2,6 +2,7 @@ import { useMemo, useState } from "react";
 import { useNavigate } from "react-router";
 import { useQuery } from "@tanstack/react-query";
 import { useVendorPortal } from "@/app/v/_components/vendor-portal-context";
+import { Text } from "@/components/ui/text";
 import { vendorPortalApi } from "@/domain/vendor-portal/api/vendor-portal-api";
 import {
   formatVendorPortalDateTime,
@@ -81,7 +82,7 @@ export default function VendorPortalPosPage() {
   return (
     <>
       <div className="vp-card">
-        <h2>Your Purchase Orders</h2>
+        <Text variant="title">Your Purchase Orders</Text>
         <div className="vp-muted" style={{ marginBottom: 12 }}>
           Every PO issued to your company, with current status and dollar value.
         </div>
@@ -113,7 +114,9 @@ export default function VendorPortalPosPage() {
       </div>
 
       {isLoading && <div className="vp-card vp-muted">Loading POs…</div>}
-      {error && <div className="vp-error">{error.message}</div>}
+      <Text variant="error" when={Boolean(error)} className="vp-error">
+        {error?.message}
+      </Text>
 
       {!isLoading && !error && visible.length === 0 && (
         <div className="vp-card vp-empty">No POs match this view.</div>
diff --git a/src/components/common/calendar/event-calendar.tsx b/src/components/common/calendar/event-calendar.tsx
index ca7d11aa..0616c81b 100644
--- a/src/components/common/calendar/event-calendar.tsx
+++ b/src/components/common/calendar/event-calendar.tsx
@@ -22,7 +22,7 @@ export const EventCalendar = forwardRef<FullCalendar, EventCalendarProps>(functi
 ) {
   return (
     <Box className="relative rounded-lg border border-border bg-card p-3">
-      {loading && (
+      {Boolean(loading) && (
         <Box className="absolute inset-0 z-10 flex flex-col items-center justify-center gap-2 bg-white/70">
           <CircularProgress size={32} />
         </Box>
diff --git a/src/components/common/signature-capture.tsx b/src/components/common/signature-capture.tsx
index c08123c2..9c14cf18 100644
--- a/src/components/common/signature-capture.tsx
+++ b/src/components/common/signature-capture.tsx
@@ -185,7 +185,7 @@ export function SignatureCapture({ onClose, onSave, title }: SignatureCapturePro
               fullWidth
               size="small"
             />
-            {typedName && (
+            {Boolean(typedName) && (
               <Typography
                 variant="h5"
                 className="rounded border border-dashed border-border px-4 py-6 text-center italic"
diff --git a/src/components/ui/collapsible-section.tsx b/src/components/ui/collapsible-section.tsx
index 273fc9cc..8a870576 100644
--- a/src/components/ui/collapsible-section.tsx
+++ b/src/components/ui/collapsible-section.tsx
@@ -32,7 +32,7 @@ export function CollapsibleSection({
         aria-expanded={open}
       >
         <div className="flex items-center gap-2">
-          {Icon && <Icon size={16} className="text-primary" />}
+          {Icon != null && <Icon size={16} className="text-primary" />}
           <span className="text-sm font-semibold text-foreground">{label}</span>
         </div>
         <div className="flex items-center gap-2">
diff --git a/src/components/ui/empty-state.tsx b/src/components/ui/empty-state.tsx
index 944591a7..5cf52b5f 100644
--- a/src/components/ui/empty-state.tsx
+++ b/src/components/ui/empty-state.tsx
@@ -1,13 +1,13 @@
-import type { ReactNode } from "react";
+import type { ReactElement } from "react";
 import { Box, Typography } from "@mui/material";
 
 import { cn } from "@/lib/utils";
 
 type EmptyStateProps = {
-  icon?: ReactNode;
+  icon?: ReactElement;
   title: string;
   description?: string;
-  action?: ReactNode;
+  action?: ReactElement;
   className?: string;
 };
 
@@ -19,11 +19,11 @@ export function EmptyState({ icon, title, description, action, className }: Empt
         className,
       )}
     >
-      {icon && <Box className="text-muted-foreground">{icon}</Box>}
+      {Boolean(icon) && <Box className="text-muted-foreground">{icon}</Box>}
       <Typography variant="subtitle1" className="text-foreground">
         {title}
       </Typography>
-      {description && (
+      {Boolean(description) && (
         <Typography
           variant="body2"
           className="max-w-sm"
@@ -34,7 +34,7 @@ export function EmptyState({ icon, title, description, action, className }: Empt
           {description}
         </Typography>
       )}
-      {action && <Box className="mt-2">{action}</Box>}
+      {Boolean(action) && <Box className="mt-2">{action}</Box>}
     </Box>
   );
 }
diff --git a/src/components/ui/filter-popover.tsx b/src/components/ui/filter-popover.tsx
index 59824344..2d8d5e8a 100644
--- a/src/components/ui/filter-popover.tsx
+++ b/src/components/ui/filter-popover.tsx
@@ -34,7 +34,7 @@ export function FilterPopover({
       <div className="flex flex-col gap-4">
         <div className="flex items-center justify-between">
           <span className="text-xs font-semibold text-foreground">Filters</span>
-          {activeCount > 0 && onClear && (
+          {activeCount > 0 && Boolean(onClear) && (
             <button
               type="button"
               onClick={onClear}
diff --git a/src/components/ui/form-field.tsx b/src/components/ui/form-field.tsx
index 7d9d5dce..f85215b0 100644
--- a/src/components/ui/form-field.tsx
+++ b/src/components/ui/form-field.tsx
@@ -64,7 +64,7 @@ export function FormField({
         {label}
       </FormLabel>
       {children}
-      {helperText && <FormHelperText>{helperText}</FormHelperText>}
+      {Boolean(helperText) && <FormHelperText>{helperText}</FormHelperText>}
     </FormControl>
   );
 }
diff --git a/src/components/ui/page-header.tsx b/src/components/ui/page-header.tsx
index a43b99e3..566ae837 100644
--- a/src/components/ui/page-header.tsx
+++ b/src/components/ui/page-header.tsx
@@ -1,13 +1,14 @@
-import type { ReactNode } from "react";
-import { Stack, Typography } from "@mui/material";
+import type { ReactElement } from "react";
+import { Stack } from "@mui/material";
 
+import { Text } from "@/components/ui/text";
 import { cn } from "@/lib/utils";
 
 type PageHeaderProps = {
   eyebrow?: string;
   title: string;
   subtitle?: string;
-  actions?: ReactNode;
+  actions?: ReactElement;
   className?: string;
   /** White surface bar (list page headers). */
   surface?: boolean;
@@ -35,26 +36,27 @@ export function PageHeader({
       }}
     >
       <Stack spacing={0}>
-        {eyebrow && (
-          <p className="m-0 font-sans text-(length:--text-xs) font-bold leading-none tracking-widest text-primary uppercase">
-            {eyebrow}
-          </p>
-        )}
-        <h1
+        <Text
+          variant="label"
+          when={Boolean(eyebrow)}
+          className="m-0 text-(length:--text-xs) font-bold leading-none tracking-widest text-primary uppercase"
+        >
+          {eyebrow}
+        </Text>
+        <Text
+          variant="display"
           className={cn(
             "m-0 font-display mt-1! text-[30px]! font-extrabold leading-[1.1] tracking-[-0.02em] text-foreground",
             eyebrow && "mt-1",
           )}
         >
           {title}
-        </h1>
-        {subtitle && (
-          <Typography variant="body2" color="text.secondary">
-            {subtitle}
-          </Typography>
-        )}
+        </Text>
+        <Text variant="description" tone="muted" when={Boolean(subtitle)}>
+          {subtitle}
+        </Text>
       </Stack>
-      {actions && (
+      {Boolean(actions) && (
         <Stack direction="row" spacing={1} sx={{ alignItems: "center", flexWrap: "nowrap" }}>
           {actions}
         </Stack>
diff --git a/src/components/ui/text.tsx b/src/components/ui/text.tsx
new file mode 100644
index 00000000..f7041792
--- /dev/null
+++ b/src/components/ui/text.tsx
@@ -0,0 +1,104 @@
+import type { ElementType, ReactNode } from "react";
+import {
+  Typography as MuiTypography,
+  type TypographyProps as MuiTypographyProps,
+} from "@mui/material";
+
+type TextVariant =
+  | "display"
+  | "title"
+  | "heading"
+  | "body"
+  | "description"
+  | "label"
+  | "feedback"
+  | "error"
+  | "caption"
+  | "code";
+
+type TextTone = "default" | "muted" | "error" | "success" | "warning";
+type TextFamily = "display" | "body" | "mono";
+
+export type TextProps = Omit<
+  MuiTypographyProps,
+  "children" | "color" | "variant" | "component" | "role" | "aria-live" | "aria-atomic"
+> & {
+  children: ReactNode;
+  as?: ElementType;
+  family?: TextFamily;
+  tone?: TextTone;
+  variant?: TextVariant;
+  when?: boolean;
+};
+
+const variantConfig: Record<
+  TextVariant,
+  { element: ElementType; muiVariant: MuiTypographyProps["variant"]; family: TextFamily }
+> = {
+  display: { element: "h1", muiVariant: "h3", family: "display" },
+  title: { element: "h2", muiVariant: "h5", family: "display" },
+  heading: { element: "h3", muiVariant: "h6", family: "display" },
+  body: { element: "p", muiVariant: "body1", family: "body" },
+  description: { element: "p", muiVariant: "body2", family: "body" },
+  label: { element: "span", muiVariant: "subtitle2", family: "body" },
+  feedback: { element: "p", muiVariant: "body2", family: "body" },
+  error: { element: "p", muiVariant: "body2", family: "body" },
+  caption: { element: "span", muiVariant: "caption", family: "body" },
+  code: { element: "code", muiVariant: "body2", family: "mono" },
+};
+
+const toneColor: Record<TextTone, MuiTypographyProps["color"]> = {
+  default: "text.primary",
+  muted: "text.secondary",
+  error: "error",
+  success: "success.main",
+  warning: "warning.main",
+};
+
+const familyValue: Record<TextFamily, string> = {
+  display: "var(--font-display)",
+  body: "var(--font-sans)",
+  mono: "var(--font-mono)",
+};
+
+export function Text({
+  as,
+  children,
+  family,
+  tone,
+  variant = "body",
+  when = true,
+  sx,
+  ...props
+}: TextProps) {
+  const persistRegion = variant === "feedback";
+
+  if (!when && !persistRegion) {
+    return null;
+  }
+
+  const config = variantConfig[variant];
+  const resolvedTone = tone ?? (variant === "error" ? "error" : "default");
+  let liveProps = {};
+  if (variant === "error") {
+    liveProps = { role: "alert", "aria-live": "assertive" as const, "aria-atomic": true as const };
+  } else if (variant === "feedback") {
+    liveProps = { role: "status", "aria-live": "polite" as const, "aria-atomic": true as const };
+  }
+
+  return (
+    <MuiTypography
+      {...props}
+      component={as ?? config.element}
+      variant={config.muiVariant}
+      color={toneColor[resolvedTone]}
+      sx={[
+        { fontFamily: familyValue[family ?? config.family] },
+        ...(Array.isArray(sx) ? sx : [sx]),
+      ]}
+      {...liveProps}
+    >
+      {when && children}
+    </MuiTypography>
+  );
+}
diff --git a/src/domain/vendors/api/vendors-api.ts b/src/domain/vendors/api/vendors-api.ts
index 42ac4ac2..4f001f04 100644
--- a/src/domain/vendors/api/vendors-api.ts
+++ b/src/domain/vendors/api/vendors-api.ts
@@ -3,23 +3,59 @@ import { apiDelete, apiGet, apiPost, apiPut } from "@/api/api";
 import { handleApiResponse, handlePaginatedResponse } from "@/api/handle-api-response";
 import {
   mapVendor,
+  mapVendorDeactivationImpact,
+  mapVendorFacets,
   mapVendorListItems,
   mapVendorPortalToken,
   mapVendorToBackend,
 } from "@/domain/vendors/mappers/vendor-mapper";
 import type {
   Vendor,
+  VendorDeactivationImpact,
+  VendorFacets,
   VendorPortalToken,
   VendorsListParams,
   VendorsListResult,
 } from "@/domain/vendors/types/vendor";
 
+function pushRepeated(
+  searchParams: Record<string, string | number>,
+  key: string,
+  values: string[] | undefined,
+): void {
+  if (!values || values.length === 0) return;
+  values.forEach((value, index) => {
+    if (!value) return;
+    searchParams[`${key}[${index}]`] = value;
+  });
+}
+
+export interface VendorFacetsParams {
+  isActive?: boolean;
+}
+
+function buildFacetsParams(params?: VendorFacetsParams): Record<string, string> {
+  const searchParams: Record<string, string> = {};
+  if (params?.isActive !== undefined) {
+    searchParams.isActive = String(params.isActive);
+  }
+  return searchParams;
+}
+
 function buildListParams(params: VendorsListParams): Record<string, string | number> {
-  return {
+  const searchParams: Record<string, string | number> = {
     search: params.search ?? "",
     page: params.page ?? 1,
     pageSize: params.pageSize ?? 12,
   };
+  if (params.isActive !== undefined) {
+    searchParams.isActive = String(params.isActive);
+  }
+  pushRepeated(searchParams, "companies", params.companies);
+  pushRepeated(searchParams, "trades", params.trades);
+  pushRepeated(searchParams, "locations", params.locations);
+  pushRepeated(searchParams, "jobBuckets", params.jobBuckets);
+  return searchParams;
 }
 
 export const vendorsApi = {
@@ -39,6 +75,13 @@ export const vendorsApi = {
     };
   },
 
+  getFacets: async (params?: VendorFacetsParams): Promise<VendorFacets> => {
+    const data = await apiGet<unknown>(API_PATHS.vendor.facets, {
+      searchParams: buildFacetsParams(params),
+    });
+    return mapVendorFacets(handleApiResponse(data));
+  },
+
   getById: async (id: string | number): Promise<Vendor> => {
     const data = await apiGet<unknown>(`${API_PATHS.rest.vendors}/${id}`);
     return mapVendor(handleApiResponse(data));
@@ -61,6 +104,13 @@ export const vendorsApi = {
     await apiDelete(`${API_PATHS.rest.vendors}/${id}`);
   },
 
+  getDeactivationImpact: async (id: string | number): Promise<VendorDeactivationImpact> => {
+    const data = await apiGet<unknown>(
+      `${API_PATHS.rest.vendors}/${id}/${API_PATHS.vendor.deactivationImpact}`,
+    );
+    return mapVendorDeactivationImpact(handleApiResponse(data));
+  },
+
   getPortalToken: async (id: string | number): Promise<VendorPortalToken | null> => {
     const data = await apiGet<unknown>(`${API_PATHS.rest.vendors}/${id}/portal-token`);
     return mapVendorPortalToken(handleApiResponse(data));
diff --git a/src/domain/vendors/mappers/vendor-mapper.ts b/src/domain/vendors/mappers/vendor-mapper.ts
index 695a0b44..9273ef8b 100644
--- a/src/domain/vendors/mappers/vendor-mapper.ts
+++ b/src/domain/vendors/mappers/vendor-mapper.ts
@@ -1,4 +1,17 @@
-import type { Vendor, VendorListItem, VendorPortalToken } from "@/domain/vendors/types/vendor";
+import type {
+  Vendor,
+  VendorDeactivationImpact,
+  VendorFacetCompany,
+  VendorFacetJobBucket,
+  VendorFacetLocation,
+  VendorFacets,
+  VendorListItem,
+  VendorOpenWorkOrderSummary,
+  VendorPortalToken,
+  VendorPreferredContact,
+} from "@/domain/vendors/types/vendor";
+
+const PREFERRED_CONTACT_VALUES = new Set<VendorPreferredContact>(["Phone", "Email", "Text"]);
 
 function asRecord(raw: unknown): Record<string, unknown> {
   return typeof raw === "object" && raw !== null ? (raw as Record<string, unknown>) : {};
@@ -13,12 +26,69 @@ function readString(record: Record<string, unknown>, ...keys: string[]): string
   return "";
 }
 
+function readNumber(record: Record<string, unknown>, ...keys: string[]): number {
+  for (const key of keys) {
+    const value = record[key];
+    if (typeof value === "number" && Number.isFinite(value)) return value;
+    if (typeof value === "string") {
+      const parsed = Number(value);
+      if (Number.isFinite(parsed)) return parsed;
+    }
+  }
+  return 0;
+}
+
 function readId(record: Record<string, unknown>): string | number {
   const value = record.id ?? record.Id;
   if (typeof value === "string" || typeof value === "number") return value;
   return "";
 }
 
+function readCompanyId(record: Record<string, unknown>): string | number | null {
+  const value = record.companyId ?? record.CompanyId;
+  if (typeof value === "string") return value.trim() === "" ? null : value;
+  if (typeof value === "number" && Number.isFinite(value)) return value;
+  return null;
+}
+
+function readNumericCompanyId(record: Record<string, unknown>): number | null {
+  const value = readCompanyId(record);
+  if (typeof value === "number") return value;
+  if (typeof value !== "string" || value.trim() === "") return null;
+  const parsed = Number(value);
+  return Number.isInteger(parsed) && parsed > 0 ? parsed : null;
+}
+
+function readPreferredContact(
+  record: Record<string, unknown>,
+  ...keys: string[]
+): VendorPreferredContact {
+  for (const key of keys) {
+    const value = record[key];
+    if (typeof value === "string") {
+      const normalized = value.trim();
+      if (PREFERRED_CONTACT_VALUES.has(normalized as VendorPreferredContact)) {
+        return normalized as VendorPreferredContact;
+      }
+      const lowered = normalized.toLowerCase();
+      if (lowered === "phone" || lowered === "call") return "Phone";
+      if (lowered === "email" || lowered === "e-mail") return "Email";
+      if (lowered === "text" || lowered === "sms") return "Text";
+    }
+  }
+  return "Phone";
+}
+
+export function toCanonicalPhone(value: unknown): string {
+  const original = String(value ?? "");
+  let digits = original.replace(/\D+/g, "");
+  if (digits.length === 11 && digits.startsWith("1")) {
+    digits = digits.slice(1);
+  }
+  if (digits.length !== 10) return original;
+  return `(${digits.slice(0, 3)}) ${digits.slice(3, 6)}-${digits.slice(6)}`;
+}
+
 function readBool(record: Record<string, unknown>, ...keys: string[]): boolean {
   for (const key of keys) {
     const value = record[key];
@@ -31,12 +101,20 @@ export function mapVendorListItem(raw: unknown): VendorListItem {
   const item = asRecord(raw);
   return {
     id: readId(item),
+    companyId: readCompanyId(item),
     companyName: readString(item, "companyName", "CompanyName"),
     contactName: readString(item, "contactName", "ContactName"),
     email: readString(item, "email", "Email"),
     phone: readString(item, "phone", "Phone"),
+    companyPhone: readString(item, "companyPhone", "CompanyPhone"),
+    googleMapsUrl: readString(item, "googleMapsUrl", "GoogleMapsUrl"),
+    notes: readString(item, "notes", "Notes"),
+    totalJobs: readNumber(item, "totalJobs", "TotalJobs"),
+    city: readString(item, "city", "City"),
+    state: readString(item, "state", "State"),
     tradeSpecialties: readString(item, "tradeSpecialties", "TradeSpecialties"),
     isActive: readBool(item, "isActive", "IsActive"),
+    preferredContact: readPreferredContact(item, "preferredContact", "PreferredContact"),
   };
 }
 
@@ -48,32 +126,44 @@ export function mapVendor(raw: unknown): Vendor {
   const item = asRecord(raw);
   return {
     id: readId(item) || undefined,
+    companyId: readCompanyId(item),
     companyName: readString(item, "companyName", "CompanyName"),
     contactName: readString(item, "contactName", "ContactName"),
     email: readString(item, "email", "Email"),
     phone: readString(item, "phone", "Phone"),
+    companyPhone: readString(item, "companyPhone", "CompanyPhone"),
+    googleMapsUrl: readString(item, "googleMapsUrl", "GoogleMapsUrl"),
+    notes: readString(item, "notes", "Notes"),
+    totalJobs: readNumber(item, "totalJobs", "TotalJobs"),
     address: readString(item, "address", "Address"),
     city: readString(item, "city", "City"),
     state: readString(item, "state", "State"),
     zip: readString(item, "zip", "Zip", "zipCode", "ZipCode"),
     tradeSpecialties: readString(item, "tradeSpecialties", "TradeSpecialties"),
     isActive: readBool(item, "isActive", "IsActive"),
+    preferredContact: readPreferredContact(item, "preferredContact", "PreferredContact"),
   };
 }
 
 export function mapVendorToBackend(vendor: unknown): Record<string, unknown> {
   const item = asRecord(vendor);
+  const companyName = readString(item, "companyName", "CompanyName");
   const payload: Record<string, unknown> = {
-    companyName: item.companyName ?? "",
-    contactName: item.contactName ?? "",
-    email: item.email ?? "",
-    phone: item.phone ?? "",
-    address: item.address ?? "",
-    city: item.city ?? "",
-    state: item.state ?? "",
-    zip: item.zip ?? "",
-    tradeSpecialties: item.tradeSpecialties ?? "",
-    isActive: item.isActive ?? true,
+    companyId: readNumericCompanyId(item),
+    companyName,
+    contactName: readString(item, "contactName", "ContactName"),
+    email: readString(item, "email", "Email"),
+    phone: toCanonicalPhone(item.phone ?? item.Phone),
+    companyPhone: toCanonicalPhone(item.companyPhone ?? item.CompanyPhone),
+    googleMapsUrl: readString(item, "googleMapsUrl", "GoogleMapsUrl"),
+    notes: readString(item, "notes", "Notes"),
+    address: readString(item, "address", "Address"),
+    city: readString(item, "city", "City"),
+    state: readString(item, "state", "State"),
+    zip: readString(item, "zip", "Zip", "zipCode", "ZipCode"),
+    tradeSpecialties: readString(item, "tradeSpecialties", "TradeSpecialties"),
+    isActive: readBool(item, "isActive", "IsActive"),
+    preferredContact: readPreferredContact(item, "preferredContact", "PreferredContact"),
   };
   const id = item.id ?? item.Id;
   if (typeof id === "string" || typeof id === "number") {
@@ -82,6 +172,63 @@ export function mapVendorToBackend(vendor: unknown): Record<string, unknown> {
   return payload;
 }
 
+function mapFacetCompany(raw: unknown): VendorFacetCompany {
+  const item = asRecord(raw);
+  return {
+    companyId: readCompanyId(item),
+    name: readString(item, "name", "Name"),
+    companyPhone: readString(item, "companyPhone", "CompanyPhone"),
+    email: readString(item, "email", "Email"),
+    address: readString(item, "address", "Address"),
+    city: readString(item, "city", "City"),
+    state: readString(item, "state", "State"),
+    zip: readString(item, "zip", "Zip", "zipCode", "ZipCode"),
+    googleMapsUrl: readString(item, "googleMapsUrl", "GoogleMapsUrl"),
+  };
+}
+
+function mapFacetLocation(raw: unknown): VendorFacetLocation {
+  const item = asRecord(raw);
+  const city = readString(item, "city", "City");
+  const state = readString(item, "state", "State");
+  const label = readString(item, "label", "Label");
+  return {
+    city,
+    state,
+    label: label || [city, state].filter(Boolean).join(", "),
+  };
+}
+
+function mapFacetJobBucket(raw: unknown): VendorFacetJobBucket {
+  const item = asRecord(raw);
+  return {
+    id: readString(item, "id", "Id"),
+    label: readString(item, "label", "Label"),
+  };
+}
+
+export function mapVendorFacets(raw: unknown): VendorFacets {
+  const item = asRecord(raw);
+  const companiesRaw = item.companies ?? item.Companies;
+  const tradesRaw = item.trades ?? item.Trades;
+  const locationsRaw = item.locations ?? item.Locations;
+  const jobBucketsRaw = item.jobBuckets ?? item.JobBuckets;
+
+  return {
+    companies: Array.isArray(companiesRaw) ? companiesRaw.map(mapFacetCompany) : [],
+    trades: Array.isArray(tradesRaw)
+      ? tradesRaw
+          .map((entry) => {
+            if (typeof entry === "string") return entry;
+            return readString(asRecord(entry), "name", "Name", "value", "Value", "label", "Label");
+          })
+          .filter(Boolean)
+      : [],
+    locations: Array.isArray(locationsRaw) ? locationsRaw.map(mapFacetLocation) : [],
+    jobBuckets: Array.isArray(jobBucketsRaw) ? jobBucketsRaw.map(mapFacetJobBucket) : [],
+  };
+}
+
 export function mapVendorPortalToken(raw: unknown): VendorPortalToken | null {
   const item = asRecord(raw);
   const portalUrl = readString(item, "portalUrl", "PortalUrl");
@@ -93,3 +240,32 @@ export function mapVendorPortalToken(raw: unknown): VendorPortalToken | null {
     lastUsedAt: readString(item, "lastUsedAt", "LastUsedAt") || undefined,
   };
 }
+
+function mapOpenWorkOrder(raw: unknown): VendorOpenWorkOrderSummary {
+  const item = asRecord(raw);
+  const workOrderId = item.workOrderId ?? item.WorkOrderId;
+  const dispatchId = item.dispatchId ?? item.DispatchId;
+  return {
+    workOrderId:
+      typeof workOrderId === "string" || typeof workOrderId === "number" ? workOrderId : "",
+    workOrderNumber: readString(item, "workOrderNumber", "WorkOrderNumber"),
+    workOrderTitle: readString(item, "workOrderTitle", "WorkOrderTitle"),
+    status: readString(item, "status", "Status"),
+    scheduledDate: readString(item, "scheduledDate", "ScheduledDate") || undefined,
+    dispatchId:
+      typeof dispatchId === "string" || typeof dispatchId === "number" ? dispatchId : undefined,
+  };
+}
+
+export function mapVendorDeactivationImpact(raw: unknown): VendorDeactivationImpact {
+  const item = asRecord(raw);
+  const openWorkOrdersRaw = item.openWorkOrders ?? item.OpenWorkOrders;
+  const rawId = item.vendorId ?? item.VendorId ?? item.id ?? item.Id;
+  const vendorId: string | number =
+    typeof rawId === "string" || typeof rawId === "number" ? rawId : "";
+  return {
+    vendorId,
+    canDeactivate: readBool(item, "canDeactivate", "CanDeactivate"),
+    openWorkOrders: Array.isArray(openWorkOrdersRaw) ? openWorkOrdersRaw.map(mapOpenWorkOrder) : [],
+  };
+}
diff --git a/src/domain/vendors/schemas/vendor-schema.ts b/src/domain/vendors/schemas/vendor-schema.ts
index cb33e82d..7ce3be5e 100644
--- a/src/domain/vendors/schemas/vendor-schema.ts
+++ b/src/domain/vendors/schemas/vendor-schema.ts
@@ -1,16 +1,42 @@
 import { z } from "zod";
+import {
+  VENDOR_PREFERRED_CONTACT_VALUES,
+  type VendorPreferredContact,
+} from "@/domain/vendors/types/vendor";
+
+const httpsUrl = z
+  .string()
+  .trim()
+  .refine(
+    (value) => value === "" || /^https:\/\/.+/i.test(value),
+    "Google Maps URL must use HTTPS",
+  );
+
+const northAmericanPhone = z.string().refine((value) => {
+  if (value === "") return true;
+  const digits = value.replace(/\D+/g, "");
+  return digits.length === 10 || (digits.length === 11 && digits.startsWith("1"));
+}, "Enter a 10-digit phone number");
 
 export const vendorSchema = z.object({
-  companyName: z.string().min(1, "Company name is required"),
-  contactName: z.string().optional(),
-  email: z.string().min(1, "Email is required").email("Invalid email"),
-  phone: z.string().optional(),
+  companyName: z.string().min(1, "Company is required"),
+  contactName: z.string().min(1, "Technician name is required"),
+  email: z.union([z.string().email("Invalid email"), z.literal("")]).optional(),
+  phone: northAmericanPhone.optional(),
+  companyPhone: northAmericanPhone.optional(),
+  googleMapsUrl: httpsUrl.optional(),
+  notes: z.string().optional(),
+  totalJobs: z.number().optional(),
   address: z.string().optional(),
   city: z.string().optional(),
   state: z.string().optional(),
   zip: z.string().optional(),
   tradeSpecialties: z.string().optional(),
   isActive: z.boolean().optional(),
+  companyId: z.union([z.string(), z.number()]).nullable().optional(),
+  preferredContact: z
+    .enum(VENDOR_PREFERRED_CONTACT_VALUES as [VendorPreferredContact, ...VendorPreferredContact[]])
+    .optional(),
 });
 
 export type VendorFormValues = z.infer<typeof vendorSchema>;
diff --git a/src/domain/vendors/types/vendor.ts b/src/domain/vendors/types/vendor.ts
index 71a41551..6c67847c 100644
--- a/src/domain/vendors/types/vendor.ts
+++ b/src/domain/vendors/types/vendor.ts
@@ -1,31 +1,54 @@
+export type VendorPreferredContact = "Phone" | "Email" | "Text";
+
+export const VENDOR_PREFERRED_CONTACT_VALUES: VendorPreferredContact[] = ["Phone", "Email", "Text"];
+
 export interface VendorListItem {
   id: string | number;
+  companyId: string | number | null;
   companyName: string;
   contactName: string;
   email: string;
   phone: string;
+  companyPhone: string;
+  googleMapsUrl: string;
+  notes: string;
+  totalJobs: number;
+  city: string;
+  state: string;
   tradeSpecialties: string;
   isActive: boolean;
+  preferredContact: VendorPreferredContact;
 }
 
 export interface Vendor {
   id?: string | number;
+  companyId: string | number | null;
   companyName: string;
   contactName: string;
   email: string;
   phone: string;
+  companyPhone: string;
+  googleMapsUrl: string;
+  notes: string;
+  totalJobs: number;
   address: string;
   city: string;
   state: string;
   zip: string;
   tradeSpecialties: string;
   isActive: boolean;
+  preferredContact: VendorPreferredContact;
 }
 
 export interface VendorsListParams {
   search?: string;
+  isActive?: boolean;
   page?: number;
   pageSize?: number;
+  companies?: string[];
+  trades?: string[];
+  locations?: string[];
+  jobBuckets?: string[];
 }
 
 export interface VendorsListResult {
@@ -35,9 +58,54 @@ export interface VendorsListResult {
   pageSize: number;
 }
 
+export interface VendorFacetCompany {
+  companyId: string | number | null;
+  name: string;
+  companyPhone: string;
+  email: string;
+  address: string;
+  city: string;
+  state: string;
+  zip: string;
+  googleMapsUrl: string;
+}
+
+export interface VendorFacetLocation {
+  city: string;
+  state: string;
+  label: string;
+}
+
+export interface VendorFacetJobBucket {
+  id: string;
+  label: string;
+}
+
+export interface VendorFacets {
+  companies: VendorFacetCompany[];
+  trades: string[];
+  locations: VendorFacetLocation[];
+  jobBuckets: VendorFacetJobBucket[];
+}
+
 export interface VendorPortalToken {
   portalUrl: string;
   issuedAt: string;
   expiresAt: string;
   lastUsedAt?: string;
 }
+
+export interface VendorOpenWorkOrderSummary {
+  workOrderId: string | number;
+  workOrderNumber: string;
+  workOrderTitle: string;
+  status: string;
+  scheduledDate?: string;
+  dispatchId?: string | number;
+}
+
+export interface VendorDeactivationImpact {
+  vendorId: string | number;
+  canDeactivate: boolean;
+  openWorkOrders: VendorOpenWorkOrderSummary[];
+}
diff --git a/src/domain/vendors/use-cases/use-create-vendor.ts b/src/domain/vendors/use-cases/use-create-vendor.ts
index 7e3283a4..fa1c730f 100644
--- a/src/domain/vendors/use-cases/use-create-vendor.ts
+++ b/src/domain/vendors/use-cases/use-create-vendor.ts
@@ -1,5 +1,4 @@
 import { useMutation, useQueryClient, type UseMutationResult } from "@tanstack/react-query";
-import { useNavigate } from "react-router";
 import { toast } from "react-toastify";
 import { vendorsApi } from "@/domain/vendors/api/vendors-api";
 import type { VendorFormValues } from "@/domain/vendors/schemas/vendor-schema";
@@ -7,7 +6,6 @@ import type { Vendor } from "@/domain/vendors/types/vendor";
 import { queryKeys } from "@/infra/query-key/query-key";
 
 export function useCreateVendor(): UseMutationResult<Vendor, Error, VendorFormValues> {
-  const navigate = useNavigate();
   const queryClient = useQueryClient();
 
   return useMutation({
@@ -15,7 +13,6 @@ export function useCreateVendor(): UseMutationResult<Vendor, Error, VendorFormVa
     onSuccess: () => {
       void queryClient.invalidateQueries({ queryKey: queryKeys.vendors.all });
       toast.success("Vendor created");
-      navigate("/vendors");
     },
     onError: (error: Error) => {
       toast.error(error.message || "Failed to create vendor");
diff --git a/src/domain/vendors/use-cases/use-delete-vendor.ts b/src/domain/vendors/use-cases/use-delete-vendor.ts
index 20c7e5a5..0457cc7e 100644
--- a/src/domain/vendors/use-cases/use-delete-vendor.ts
+++ b/src/domain/vendors/use-cases/use-delete-vendor.ts
@@ -10,10 +10,10 @@ export function useDeleteVendor(): UseMutationResult<void, Error, string | numbe
     mutationFn: (id: string | number) => vendorsApi.delete(id),
     onSuccess: () => {
       void queryClient.invalidateQueries({ queryKey: queryKeys.vendors.all });
-      toast.success("Vendor deleted");
+      toast.success("Vendor deactivated");
     },
     onError: (error: Error) => {
-      toast.error(error.message || "Failed to delete vendor");
+      toast.error(error.message || "Failed to deactivate vendor");
     },
   });
 }
diff --git a/src/domain/vendors/use-cases/use-update-vendor.ts b/src/domain/vendors/use-cases/use-update-vendor.ts
index 34c61c9a..cf4f4c84 100644
--- a/src/domain/vendors/use-cases/use-update-vendor.ts
+++ b/src/domain/vendors/use-cases/use-update-vendor.ts
@@ -1,5 +1,4 @@
 import { useMutation, useQueryClient, type UseMutationResult } from "@tanstack/react-query";
-import { useNavigate } from "react-router";
 import { toast } from "react-toastify";
 import { vendorsApi } from "@/domain/vendors/api/vendors-api";
 import type { VendorFormValues } from "@/domain/vendors/schemas/vendor-schema";
@@ -12,7 +11,6 @@ interface UpdateVendorInput {
 }
 
 export function useUpdateVendor(): UseMutationResult<Vendor, Error, UpdateVendorInput> {
-  const navigate = useNavigate();
   const queryClient = useQueryClient();
 
   return useMutation({
@@ -21,7 +19,6 @@ export function useUpdateVendor(): UseMutationResult<Vendor, Error, UpdateVendor
       void queryClient.invalidateQueries({ queryKey: queryKeys.vendors.all });
       void queryClient.invalidateQueries({ queryKey: queryKeys.vendors.detail(variables.id) });
       toast.success("Vendor updated");
-      navigate("/vendors");
     },
     onError: (error: Error) => {
       toast.error(error.message || "Failed to update vendor");
diff --git a/src/domain/vendors/use-cases/use-vendor-deactivation-impact.ts b/src/domain/vendors/use-cases/use-vendor-deactivation-impact.ts
new file mode 100644
index 00000000..7c59c970
--- /dev/null
+++ b/src/domain/vendors/use-cases/use-vendor-deactivation-impact.ts
@@ -0,0 +1,22 @@
+import { useQuery, type UseQueryResult } from "@tanstack/react-query";
+import { vendorsApi } from "@/domain/vendors/api/vendors-api";
+import type { VendorDeactivationImpact } from "@/domain/vendors/types/vendor";
+import { queryKeys } from "@/infra/query-key/query-key";
+
+export function useVendorDeactivationImpact(
+  id: string | number | undefined,
+): UseQueryResult<VendorDeactivationImpact, Error> {
+  return useQuery({
+    queryKey: queryKeys.vendors.deactivationImpact(id ?? ""),
+    queryFn: () => vendorsApi.getDeactivationImpact(requireParam(id)),
+    enabled: id !== undefined && id !== null && id !== "",
+    staleTime: 0,
+  });
+}
+
+function requireParam(id: string | number | undefined): string | number {
+  if (id === undefined || id === null || id === "") {
+    throw new Error("Vendor id is required");
+  }
+  return id;
+}
diff --git a/src/domain/vendors/use-cases/use-vendor-facets.ts b/src/domain/vendors/use-cases/use-vendor-facets.ts
new file mode 100644
index 00000000..2aef7d19
--- /dev/null
+++ b/src/domain/vendors/use-cases/use-vendor-facets.ts
@@ -0,0 +1,13 @@
+import { useQuery, type UseQueryResult } from "@tanstack/react-query";
+import { vendorsApi, type VendorFacetsParams } from "@/domain/vendors/api/vendors-api";
+import type { VendorFacets } from "@/domain/vendors/types/vendor";
+import { queryKeys } from "@/infra/query-key/query-key";
+
+export function useVendorFacets(isActive?: boolean): UseQueryResult<VendorFacets, Error> {
+  const params: VendorFacetsParams | undefined = isActive !== undefined ? { isActive } : undefined;
+  return useQuery({
+    queryKey: queryKeys.vendors.facets(isActive),
+    queryFn: () => vendorsApi.getFacets(params),
+    staleTime: 60_000,
+  });
+}
diff --git a/src/domain/work-orders/api/work-orders-api.ts b/src/domain/work-orders/api/work-orders-api.ts
index c17f207d..a3ede840 100644
--- a/src/domain/work-orders/api/work-orders-api.ts
+++ b/src/domain/work-orders/api/work-orders-api.ts
@@ -1,5 +1,5 @@
 import { API_PATHS } from "@/api/api-paths";
-import { apiDelete, apiGet, apiPost } from "@/api/api";
+import { apiDelete, apiGet, apiPost, apiPut } from "@/api/api";
 import { handleApiResponse, handlePaginatedResponse } from "@/api/handle-api-response";
 import {
   isWoTableMockEnabled,
@@ -37,6 +37,7 @@ import type {
   LocationOption,
   TaskListTemplate,
   UpdateDispatchPayload,
+  WorkOrderVendorUpdatePayload,
   VendorDropdownItem,
   WorkOrderComment,
   WorkOrderDetail,
@@ -294,6 +295,13 @@ export const workOrdersApi = {
     await apiPost<unknown>(API_PATHS.workOrder.updateDispatch, mapUpdateDispatchPayload(payload));
   },
 
+  updateVendorFromWorkOrder: async (
+    vendorId: string | number,
+    payload: WorkOrderVendorUpdatePayload,
+  ): Promise<void> => {
+    await apiPut<unknown>(`${API_PATHS.rest.vendors}/${vendorId}/work-order-update`, payload);
+  },
+
   addDispatchComment: async (
     dispatchId: string | number,
     text: string,
diff --git a/src/domain/work-orders/mappers/work-order-mapper.ts b/src/domain/work-orders/mappers/work-order-mapper.ts
index 687aa3b1..c424c26e 100644
--- a/src/domain/work-orders/mappers/work-order-mapper.ts
+++ b/src/domain/work-orders/mappers/work-order-mapper.ts
@@ -250,9 +250,11 @@ export function mapWorkOrderDispatchSummary(raw: unknown): WorkOrderDispatchSumm
 
   return {
     id: readId(item),
+    vendorId: readId({ id: item.vendorId ?? item.VendorId }),
     dispatchNumber: readString(item, "dispatchNumber", "DispatchNumber"),
     poNumber: readString(item, "poNumber", "PoNumber", "PONumber"),
     vendorName: readString(item, "vendorName", "VendorName"),
+    vendorEmail: readString(item, "vendorEmail", "VendorEmail"),
     nteAmount: readNumber(item, "nteAmount", "NTEAmount"),
     status: readString(item, "status", "Status"),
     dispatchedAt: readString(item, "dispatchedAt", "DispatchedAt"),
diff --git a/src/domain/work-orders/types/dispatch.ts b/src/domain/work-orders/types/dispatch.ts
index d5df044c..fdb0175c 100644
--- a/src/domain/work-orders/types/dispatch.ts
+++ b/src/domain/work-orders/types/dispatch.ts
@@ -1,13 +1,24 @@
 export interface WorkOrderDispatchSummary {
   id: string | number;
+  vendorId: string | number;
   dispatchNumber: string;
   poNumber: string;
   vendorName: string;
+  vendorEmail: string;
   nteAmount: number | null;
   status: string;
   dispatchedAt: string;
 }
 
+export interface WorkOrderVendorUpdatePayload {
+  workOrderId: number;
+  contactName?: string;
+  preferredContact: "Phone" | "Email" | "Text";
+  phone?: string;
+  email?: string;
+  notes?: string;
+}
+
 export interface DispatchChecklistItem {
   id: string | number;
   itemText: string;
diff --git a/src/domain/work-orders/types/work-order.ts b/src/domain/work-orders/types/work-order.ts
index c1440bff..f266bc6a 100644
--- a/src/domain/work-orders/types/work-order.ts
+++ b/src/domain/work-orders/types/work-order.ts
@@ -7,6 +7,7 @@ export type {
   DispatchWorkOrderRef,
   UpdateDispatchPayload,
   WorkOrderDispatchSummary,
+  WorkOrderVendorUpdatePayload,
 } from "./dispatch";
 
 export type {
diff --git a/src/domain/work-orders/use-cases/use-work-order-mutations.ts b/src/domain/work-orders/use-cases/use-work-order-mutations.ts
index ed877ab5..5c69e3a4 100644
--- a/src/domain/work-orders/use-cases/use-work-order-mutations.ts
+++ b/src/domain/work-orders/use-cases/use-work-order-mutations.ts
@@ -11,6 +11,7 @@ import type {
   WorkOrderComment,
   WorkOrderDetail,
   WorkOrderFormValues,
+  WorkOrderVendorUpdatePayload,
 } from "@/domain/work-orders/types/work-order";
 import { queryKeys } from "@/infra/query-key/query-key";
 
@@ -46,6 +47,11 @@ interface ChangeWorkOrderAssignmentInput {
   userName: string;
 }
 
+interface UpdateWorkOrderVendorInput {
+  vendorId: string | number;
+  payload: WorkOrderVendorUpdatePayload;
+}
+
 export function useCreateWorkOrder(): UseMutationResult<
   WorkOrderDetail,
   Error,
@@ -89,6 +95,26 @@ export function useUpdateWorkOrder(
   });
 }
 
+export function useUpdateWorkOrderVendor(
+  workOrderId: string | number,
+): UseMutationResult<void, Error, UpdateWorkOrderVendorInput> {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: ({ vendorId, payload }) =>
+      workOrdersApi.updateVendorFromWorkOrder(vendorId, payload),
+    onSuccess: () => {
+      void queryClient.invalidateQueries({ queryKey: queryKeys.workOrders.detail(workOrderId) });
+      void queryClient.invalidateQueries({ queryKey: queryKeys.workOrders.all });
+      void queryClient.invalidateQueries({ queryKey: queryKeys.vendors.all });
+      toast.success("Vendor contact updated");
+    },
+    onError: (error: Error) => {
+      toast.error(error.message || "Failed to update vendor contact");
+    },
+  });
+}
+
 export function useAddWorkOrderComment(
   workOrderId: string | number,
 ): UseMutationResult<WorkOrderComment, Error, AddWorkOrderCommentInput> {
diff --git a/src/infra/query-key/query-key.ts b/src/infra/query-key/query-key.ts
index 21544914..4548791b 100644
--- a/src/infra/query-key/query-key.ts
+++ b/src/infra/query-key/query-key.ts
@@ -56,8 +56,11 @@ export const queryKeys = {
     list: (params?: Record<string, unknown>) =>
       [...queryKeys.vendors.all, "list", params ?? {}] as const,
     detail: (id: string | number) => [...queryKeys.vendors.all, "detail", id] as const,
+    facets: (isActive?: boolean) => [...queryKeys.vendors.all, "facets", isActive ?? null] as const,
     portalToken: (vendorId: string | number) =>
       [...queryKeys.vendors.all, "portalToken", vendorId] as const,
+    deactivationImpact: (vendorId: string | number) =>
+      [...queryKeys.vendors.all, "deactivationImpact", vendorId] as const,
   },
   calendar: {
     all: ["calendar"] as const,
diff --git a/src/routing/app-shell.tsx b/src/routing/app-shell.tsx
index 956485f3..4aab96e0 100644
--- a/src/routing/app-shell.tsx
+++ b/src/routing/app-shell.tsx
@@ -4,28 +4,28 @@ import type { RouteObject } from "react-router";
 
 import type { RouteModule } from "@/routing/route-module";
 
-function Modals({ modalRoutes }: { modalRoutes: Record<string, ComponentType> }) {
-  const modalPath = useLocation().state?.modal as string | undefined;
-  const Modal = modalPath ? modalRoutes[modalPath] : undefined;
-
-  if (!Modal) {
-    return null;
-  }
-
-  return <Modal />;
-}
-
 export function createAppShellRoute(
   appLayout: RouteModule | undefined,
   modalRoutes: Record<string, ComponentType>,
 ): Pick<RouteObject, "Component" | "ErrorBoundary" | "loader"> {
   const AppLayout = appLayout?.default ?? Outlet;
 
+  function Modals() {
+    const modalPath = useLocation().state?.modal as string | undefined;
+    const Modal = modalPath ? modalRoutes[modalPath] : undefined;
+
+    if (!Modal) {
+      return null;
+    }
+
+    return <Modal />;
+  }
+
   function Layout() {
     return (
       <>
         <AppLayout />
-        <Modals modalRoutes={modalRoutes} />
+        <Modals />
       </>
     );
   }
diff --git a/src/test/app/(protected)/vendors/vendor-form-fields.test.tsx b/src/test/app/(protected)/vendors/vendor-form-fields.test.tsx
new file mode 100644
index 00000000..24d4c790
--- /dev/null
+++ b/src/test/app/(protected)/vendors/vendor-form-fields.test.tsx
@@ -0,0 +1,205 @@
+import { screen } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { zodResolver } from "@hookform/resolvers/zod";
+import { useForm, useWatch, type FieldErrors } from "react-hook-form";
+import { describe, expect, it } from "vitest";
+import { VendorFormFields } from "@/app/(protected)/vendors/_components/vendor-form-fields";
+import { vendorSchema, type VendorFormValues } from "@/domain/vendors/schemas/vendor-schema";
+import type { VendorFacetCompany } from "@/domain/vendors/types/vendor";
+import { renderWithProviders } from "@/test/test-utils";
+
+const companies: VendorFacetCompany[] = [
+  {
+    companyId: "co-1",
+    name: "Gateway Plumbing",
+    companyPhone: "(314) 555-0198",
+    email: "dispatch@gatewayplumbing.com",
+    address: "1 Main St",
+    city: "St. Louis",
+    state: "MO",
+    zip: "63101",
+    googleMapsUrl: "https://maps.google.com/gateway",
+  },
+];
+
+const emptyForm: VendorFormValues = {
+  companyName: "",
+  contactName: "Tech Person",
+  email: "",
+  phone: "",
+  companyPhone: "",
+  googleMapsUrl: "",
+  notes: "",
+  totalJobs: 0,
+  address: "",
+  city: "",
+  state: "",
+  zip: "",
+  tradeSpecialties: "",
+  isActive: true,
+  companyId: null,
+  preferredContact: "Phone",
+};
+
+function Harness({
+  defaultValues,
+  resetTarget,
+}: {
+  defaultValues: VendorFormValues;
+  resetTarget: VendorFormValues;
+}) {
+  const { control, reset, setValue } = useForm<VendorFormValues>({
+    resolver: zodResolver(vendorSchema),
+    defaultValues,
+  });
+
+  const onCompanySelected = (company: VendorFacetCompany | null) => {
+    if (!company) return;
+    setValue("companyId", company.companyId);
+    setValue("companyPhone", company.companyPhone);
+    setValue("email", company.email);
+    setValue("address", company.address);
+    setValue("city", company.city);
+    setValue("state", company.state);
+    setValue("zip", company.zip);
+    setValue("googleMapsUrl", company.googleMapsUrl);
+  };
+
+  const companyId = useWatch({ control, name: "companyId" });
+
+  return (
+    <>
+      <VendorFormFields
+        control={control}
+        errors={{} as FieldErrors<VendorFormValues>}
+        companies={companies}
+        tradeOptions={[]}
+        onCompanySelected={onCompanySelected}
+      />
+      <output data-testid="company-id">{String(companyId ?? "")}</output>
+      <button type="button" onClick={() => reset(resetTarget)}>
+        reset-form
+      </button>
+    </>
+  );
+}
+
+const companyField = () => screen.getByRole("combobox", { name: "Company" }) as HTMLInputElement;
+const companyIdOutput = () => screen.getByTestId("company-id");
+
+describe("VendorFormFields company autocomplete state", () => {
+  it("clears a previously typed company when the form is reset (create-form reopen)", async () => {
+    renderWithProviders(<Harness defaultValues={emptyForm} resetTarget={emptyForm} />, {
+      withAuth: false,
+    });
+
+    await userEvent.type(companyField(), "Leftover Co");
+    expect(companyField()).toHaveValue("Leftover Co");
+
+    await userEvent.click(screen.getByRole("button", { name: "reset-form" }));
+
+    expect(companyField()).toHaveValue("");
+  });
+
+  it("shows the switched company value instead of previously typed text when the form is reset", async () => {
+    renderWithProviders(
+      <Harness
+        defaultValues={emptyForm}
+        resetTarget={{ ...emptyForm, companyName: "Beta LLC", contactName: "Other Tech" }}
+      />,
+      { withAuth: false },
+    );
+
+    await userEvent.type(companyField(), "Acme");
+    expect(companyField()).toHaveValue("Acme");
+
+    await userEvent.click(screen.getByRole("button", { name: "reset-form" }));
+
+    expect(companyField()).toHaveValue("Beta LLC");
+  });
+
+  it("reflects the company provided by an external reset even when nothing was typed", async () => {
+    renderWithProviders(
+      <Harness
+        defaultValues={{ ...emptyForm, companyName: "Acme Corp" }}
+        resetTarget={{ ...emptyForm, companyName: "Beta LLC" }}
+      />,
+      { withAuth: false },
+    );
+
+    expect(companyField()).toHaveValue("Acme Corp");
+
+    await userEvent.click(screen.getByRole("button", { name: "reset-form" }));
+
+    expect(companyField()).toHaveValue("Beta LLC");
+  });
+
+  it("updates the displayed company as the user types (freeSolo)", async () => {
+    renderWithProviders(<Harness defaultValues={emptyForm} resetTarget={emptyForm} />, {
+      withAuth: false,
+    });
+
+    await userEvent.type(companyField(), "Acme");
+
+    expect(companyField()).toHaveValue("Acme");
+  });
+
+  it("selects a company option, autofills company details, and shows the company name", async () => {
+    renderWithProviders(<Harness defaultValues={emptyForm} resetTarget={emptyForm} />, {
+      withAuth: false,
+    });
+
+    await userEvent.type(companyField(), "Gate");
+    const option = await screen.findByRole("option", { name: "Gateway Plumbing" });
+    await userEvent.click(option);
+
+    expect(companyField()).toHaveValue("Gateway Plumbing");
+    expect(screen.getByRole("textbox", { name: "Company Phone" })).toHaveValue("(314) 555-0198");
+  });
+
+  it("sets companyId when a known company is selected and clears it when the text changes", async () => {
+    renderWithProviders(<Harness defaultValues={emptyForm} resetTarget={emptyForm} />, {
+      withAuth: false,
+    });
+
+    await userEvent.type(companyField(), "Gate");
+    await userEvent.click(await screen.findByRole("option", { name: "Gateway Plumbing" }));
+    expect(companyIdOutput()).toHaveTextContent("co-1");
+
+    await userEvent.type(companyField(), "!");
+    expect(companyIdOutput()).toHaveTextContent("");
+  });
+
+  it("keeps companyId null for free-typed company text that matches no option", async () => {
+    renderWithProviders(<Harness defaultValues={emptyForm} resetTarget={emptyForm} />, {
+      withAuth: false,
+    });
+
+    await userEvent.type(companyField(), "Independent Vendor LLC");
+    expect(companyIdOutput()).toHaveTextContent("");
+  });
+
+  it("formats technician and company phones into the (XXX) XXX-XXXX mask", async () => {
+    renderWithProviders(<Harness defaultValues={emptyForm} resetTarget={emptyForm} />, {
+      withAuth: false,
+    });
+
+    const phone = screen.getByRole("textbox", { name: "Technician Phone" });
+    await userEvent.type(phone, "3145550198");
+    expect(phone).toHaveValue("(314) 555-0198");
+
+    const companyPhone = screen.getByRole("textbox", { name: "Company Phone" });
+    await userEvent.type(companyPhone, "3145550100");
+    expect(companyPhone).toHaveValue("(314) 555-0100");
+  });
+
+  it("exposes a preferred contact selector with Phone, Email, and Text options", () => {
+    renderWithProviders(<Harness defaultValues={emptyForm} resetTarget={emptyForm} />, {
+      withAuth: false,
+    });
+
+    expect(screen.getByRole("button", { name: "Phone" })).toHaveAttribute("aria-pressed", "true");
+    expect(screen.getByRole("button", { name: "Email" })).toBeInTheDocument();
+    expect(screen.getByRole("button", { name: "Text" })).toBeInTheDocument();
+  });
+});
diff --git a/src/test/app/(protected)/vendors/vendors-list.test.tsx b/src/test/app/(protected)/vendors/vendors-list.test.tsx
new file mode 100644
index 00000000..995dd5dc
--- /dev/null
+++ b/src/test/app/(protected)/vendors/vendors-list.test.tsx
@@ -0,0 +1,163 @@
+import { screen } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { describe, expect, it, vi } from "vitest";
+import VendorsListPage from "@/app/(protected)/vendors/index";
+import { renderWithProviders } from "@/test/test-utils";
+
+const useVendorsList = vi.fn();
+const useVendorDetail = vi.fn();
+const useVendorDeactivationImpact = vi.fn();
+const mutate = vi.fn();
+
+vi.mock("@/domain/vendors/use-cases/use-vendors-list", () => ({
+  useVendorsList: (...args: unknown[]) => useVendorsList(...args),
+}));
+
+vi.mock("@/domain/vendors/use-cases/use-vendor-detail", () => ({
+  useVendorDetail: (...args: unknown[]) => useVendorDetail(...args),
+}));
+
+vi.mock("@/domain/vendors/use-cases/use-vendor-deactivation-impact", () => ({
+  useVendorDeactivationImpact: (...args: unknown[]) => useVendorDeactivationImpact(...args),
+}));
+
+vi.mock("@/domain/vendors/use-cases/use-delete-vendor", () => ({
+  useDeleteVendor: () => ({ mutate, isPending: false }),
+}));
+
+vi.mock("@/hooks/use-debounce", () => ({
+  useDebounce: (value: string) => value,
+}));
+
+const activeVendor = {
+  id: 1,
+  companyId: "co-1",
+  companyName: "Gateway Plumbing",
+  contactName: "Adam Whyte",
+  email: "dispatch@gatewayplumbing.com",
+  phone: "(314) 555-0198",
+  city: "St. Louis",
+  state: "MO",
+  tradeSpecialties: "Backflow Preventers",
+  isActive: true,
+  preferredContact: "Email",
+};
+
+const inactiveVendor = {
+  ...activeVendor,
+  id: 2,
+  companyName: "Drain Cleaning Bros",
+  isActive: false,
+};
+
+function result(items: (typeof activeVendor)[], totalCount: number) {
+  return {
+    data: { items, totalCount, page: 1, pageSize: 12 },
+    isLoading: false,
+    isFetching: false,
+    error: null,
+  };
+}
+
+function setupDefaults() {
+  useVendorDetail.mockReturnValue({ data: undefined, isLoading: false, error: null });
+  useVendorDeactivationImpact.mockReturnValue({
+    data: undefined,
+    isLoading: false,
+    error: null,
+  });
+}
+
+describe("VendorsListPage", () => {
+  it("renders prototype-aligned status tabs and location, then hides deactivation for inactive rows", async () => {
+    setupDefaults();
+    useVendorsList.mockImplementation((params: { isActive?: boolean; pageSize?: number }) => {
+      if (params.pageSize === 1) return result([], params.isActive ? 1 : 1);
+      return params.isActive ? result([activeVendor], 1) : result([inactiveVendor], 1);
+    });
+
+    renderWithProviders(<VendorsListPage />, { route: "/vendors", withAuth: false });
+
+    expect(screen.getByRole("heading", { name: "Vendors / Technicians" })).toBeInTheDocument();
+    expect(screen.getByText("St. Louis, MO")).toBeInTheDocument();
+    expect(screen.getByRole("button", { name: "Deactivate vendor" })).toBeInTheDocument();
+
+    await userEvent.click(screen.getByRole("tab", { name: "Inactive (1)" }));
+
+    expect(screen.getByText("Drain Cleaning Bros")).toBeInTheDocument();
+    expect(screen.queryByRole("button", { name: "Deactivate vendor" })).not.toBeInTheDocument();
+  });
+
+  it("reports the filtered totalCount in the footer when page rows are fewer than total", () => {
+    setupDefaults();
+    const pageVendors = Array.from({ length: 3 }, (_, index) => ({
+      ...activeVendor,
+      id: 100 + index,
+      companyName: `Vendor ${index + 1}`,
+    }));
+
+    useVendorsList.mockImplementation((params: { isActive?: boolean; pageSize?: number }) => {
+      if (params.pageSize === 1) return result([], params.isActive ? 25 : 0);
+      return result(pageVendors, 25);
+    });
+
+    renderWithProviders(<VendorsListPage />, { route: "/vendors", withAuth: false });
+
+    expect(screen.getByText(/25 active technicians/)).toBeInTheDocument();
+    expect(screen.queryByText(/3 active technicians/)).not.toBeInTheDocument();
+  });
+
+  it("opens the detail drawer when a row is clicked or activated by keyboard", async () => {
+    setupDefaults();
+    useVendorDetail.mockReturnValue({ data: activeVendor, isLoading: false, error: null });
+    useVendorsList.mockImplementation((params: { isActive?: boolean; pageSize?: number }) => {
+      if (params.pageSize === 1) return result([], 1);
+      return params.isActive ? result([activeVendor], 1) : result([], 0);
+    });
+
+    renderWithProviders(<VendorsListPage />, { route: "/vendors", withAuth: false });
+
+    const row = screen.getByRole("button", {
+      name: "Open vendor details for Gateway Plumbing",
+    });
+    row.focus();
+    await userEvent.keyboard("{Enter}");
+
+    expect(screen.getByRole("heading", { level: 2, name: "Gateway Plumbing" })).toBeInTheDocument();
+  });
+
+  it("blocks deactivation when the preflight reports open work orders", async () => {
+    setupDefaults();
+    useVendorDeactivationImpact.mockReturnValue({
+      data: {
+        vendorId: 1,
+        canDeactivate: false,
+        openWorkOrders: [
+          {
+            workOrderId: 101,
+            workOrderNumber: "WO-101",
+            workOrderTitle: "Boiler repair",
+            status: "Dispatched",
+          },
+        ],
+      },
+      isLoading: false,
+      error: null,
+    });
+    useVendorsList.mockImplementation((params: { isActive?: boolean; pageSize?: number }) => {
+      if (params.pageSize === 1) return result([], 1);
+      return params.isActive ? result([activeVendor], 1) : result([], 0);
+    });
+
+    renderWithProviders(<VendorsListPage />, { route: "/vendors", withAuth: false });
+
+    await userEvent.click(screen.getByRole("button", { name: "Deactivate vendor" }));
+
+    expect(
+      screen.getByText(/cannot be deactivated because it still has open work orders/),
+    ).toBeInTheDocument();
+    expect(screen.getByText(/Boiler repair/)).toBeInTheDocument();
+    expect(screen.getByRole("button", { name: /^Deactivate$/ })).toBeDisabled();
+    expect(mutate).not.toHaveBeenCalled();
+  });
+});
diff --git a/src/test/components/ui/text.test.tsx b/src/test/components/ui/text.test.tsx
new file mode 100644
index 00000000..04973d75
--- /dev/null
+++ b/src/test/components/ui/text.test.tsx
@@ -0,0 +1,82 @@
+import { screen } from "@testing-library/react";
+import { describe, expect, it } from "vitest";
+
+import { Text } from "@/components/ui/text";
+import { renderWithProviders } from "@/test/test-utils";
+
+describe("Text", () => {
+  it("maps visual variants to semantic elements", () => {
+    renderWithProviders(
+      <>
+        <Text variant="display">Page title</Text>
+        <Text variant="description">Supporting copy</Text>
+      </>,
+      { withAuth: false },
+    );
+
+    expect(screen.getByRole("heading", { level: 1, name: "Page title" })).toBeInTheDocument();
+    expect(screen.getByText("Supporting copy").tagName).toBe("P");
+  });
+
+  it("does not render conditional text when its condition is false", () => {
+    renderWithProviders(
+      <Text when={false} variant="body">
+        Saved
+      </Text>,
+      { withAuth: false },
+    );
+
+    expect(screen.queryByText("Saved")).not.toBeInTheDocument();
+  });
+
+  it("keeps the feedback live region mounted so toggling its content is announceable", () => {
+    const { rerender } = renderWithProviders(
+      <Text variant="feedback" when={false}>
+        Saved
+      </Text>,
+      { withAuth: false },
+    );
+
+    const region = screen.getByRole("status");
+    expect(region).toHaveAttribute("aria-live", "polite");
+    expect(region).toHaveAttribute("aria-atomic", "true");
+    expect(region).toBeEmptyDOMElement();
+
+    rerender(
+      <Text variant="feedback" when={true}>
+        Saved
+      </Text>,
+    );
+
+    expect(screen.getByRole("status")).toBe(region);
+    expect(region).toHaveTextContent("Saved");
+  });
+
+  it("gives error and feedback messages accessible live-region semantics", () => {
+    renderWithProviders(
+      <>
+        <Text variant="error">Upload failed</Text>
+        <Text variant="feedback">Uploading</Text>
+      </>,
+      { withAuth: false },
+    );
+
+    const alert = screen.getByRole("alert");
+    const status = screen.getByRole("status");
+    expect(alert).toHaveTextContent("Upload failed");
+    expect(status).toHaveTextContent("Uploading");
+    expect(alert).toHaveAttribute("aria-live", "assertive");
+    expect(alert).toHaveAttribute("aria-atomic", "true");
+    expect(status).toHaveAttribute("aria-live", "polite");
+    expect(status).toHaveAttribute("aria-atomic", "true");
+  });
+
+  it("does not attach live-region semantics to non-feedback variants", () => {
+    renderWithProviders(<Text variant="body">Saved</Text>, { withAuth: false });
+
+    const node = screen.getByText("Saved");
+    expect(node).not.toHaveAttribute("role");
+    expect(node).not.toHaveAttribute("aria-live");
+    expect(node).not.toHaveAttribute("aria-atomic");
+  });
+});
diff --git a/src/test/domain/vendors/api/vendors-api.test.ts b/src/test/domain/vendors/api/vendors-api.test.ts
new file mode 100644
index 00000000..b66ce1bf
--- /dev/null
+++ b/src/test/domain/vendors/api/vendors-api.test.ts
@@ -0,0 +1,269 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { API_PATHS } from "@/api/api-paths";
+
+const apiGet = vi.fn();
+const apiPost = vi.fn();
+const apiPut = vi.fn();
+const apiDelete = vi.fn();
+
+vi.mock("@/api/api", () => ({
+  apiGet: (...args: unknown[]) => apiGet(...args),
+  apiPost: (...args: unknown[]) => apiPost(...args),
+  apiPut: (...args: unknown[]) => apiPut(...args),
+  apiDelete: (...args: unknown[]) => apiDelete(...args),
+}));
+
+import { vendorsApi } from "@/domain/vendors/api/vendors-api";
+
+describe("vendorsApi.getList", () => {
+  beforeEach(() => {
+    apiGet.mockReset();
+    apiPost.mockReset();
+    apiPut.mockReset();
+    apiDelete.mockReset();
+    apiGet.mockResolvedValue({
+      Data: [
+        {
+          Id: 7,
+          CompanyId: "co-1",
+          CompanyName: "Gateway Plumbing",
+          ContactName: "Adam Whyte",
+          City: "St. Louis",
+          State: "MO",
+          IsActive: false,
+          PreferredContact: "Email",
+        },
+      ],
+      TotalCount: 1,
+    });
+  });
+
+  it("forwards the status filter and maps list location fields", async () => {
+    const result = await vendorsApi.getList({ search: "gateway", isActive: false, page: 1 });
+
+    expect(apiGet).toHaveBeenCalledWith(API_PATHS.vendor.getList, {
+      searchParams: { search: "gateway", isActive: "false", page: 1, pageSize: 12 },
+    });
+    expect(result.items[0]).toMatchObject({
+      city: "St. Louis",
+      state: "MO",
+      isActive: false,
+      companyId: "co-1",
+      preferredContact: "Email",
+    });
+  });
+
+  it("forwards all selected facets as repeated indexed query parameters", async () => {
+    await vendorsApi.getList({
+      companies: ["Gateway Plumbing", "Metro HVAC"],
+      trades: ["Plumbing"],
+      locations: ["St. Louis, MO"],
+      jobBuckets: ["50-99"],
+    });
+
+    expect(apiGet).toHaveBeenCalledWith(API_PATHS.vendor.getList, {
+      searchParams: {
+        search: "",
+        page: 1,
+        pageSize: 12,
+        "companies[0]": "Gateway Plumbing",
+        "companies[1]": "Metro HVAC",
+        "trades[0]": "Plumbing",
+        "locations[0]": "St. Louis, MO",
+        "jobBuckets[0]": "50-99",
+      },
+    });
+  });
+
+  it("maps company profiles and labels returned by the facets endpoint", async () => {
+    apiGet.mockResolvedValueOnce({
+      data: {
+        companies: [
+          {
+            name: "Gateway Plumbing",
+            companyPhone: "314-555-0100",
+            email: "dispatch@gateway.test",
+            address: "1 Market St",
+            city: "St. Louis",
+            state: "MO",
+            zip: "63101",
+            googleMapsUrl: "https://maps.google.com/gateway",
+          },
+        ],
+        trades: ["Plumbing"],
+        locations: [{ city: "St. Louis", state: "MO" }],
+        jobBuckets: [{ id: "50-99", label: "50–99" }],
+      },
+    });
+
+    const facets = await vendorsApi.getFacets();
+
+    expect(apiGet).toHaveBeenCalledWith(API_PATHS.vendor.facets, { searchParams: {} });
+    expect(facets.companies[0]).toMatchObject({
+      name: "Gateway Plumbing",
+      companyPhone: "314-555-0100",
+      googleMapsUrl: "https://maps.google.com/gateway",
+    });
+    expect(facets.locations[0]?.label).toBe("St. Louis, MO");
+    expect(facets.jobBuckets[0]).toEqual({ id: "50-99", label: "50–99" });
+  });
+
+  it("serializes the requested facet scope as an isActive query parameter", async () => {
+    apiGet.mockResolvedValue({
+      data: { companies: [], trades: [], locations: [], jobBuckets: [] },
+    });
+
+    await vendorsApi.getFacets({ isActive: true });
+    await vendorsApi.getFacets({ isActive: false });
+
+    expect(apiGet).toHaveBeenNthCalledWith(1, API_PATHS.vendor.facets, {
+      searchParams: { isActive: "true" },
+    });
+    expect(apiGet).toHaveBeenNthCalledWith(2, API_PATHS.vendor.facets, {
+      searchParams: { isActive: "false" },
+    });
+  });
+
+  it("sends all editable prototype fields when creating and updating", async () => {
+    const values = {
+      companyId: "42",
+      companyName: "Gateway Plumbing",
+      contactName: "Adam Whyte",
+      phone: "+1 314-555-0198",
+      companyPhone: "314-555-0100",
+      email: "dispatch@gateway.test",
+      address: "1 Market St",
+      city: "St. Louis",
+      state: "MO",
+      zip: "63101",
+      tradeSpecialties: "Plumbing, HVAC",
+      googleMapsUrl: "https://maps.google.com/gateway",
+      notes: "Preferred after-hours vendor",
+      totalJobs: 72,
+      isActive: true,
+      preferredContact: "Text",
+    };
+    apiPost.mockResolvedValueOnce({ data: values });
+    apiPut.mockResolvedValueOnce({ data: { ...values, isActive: false } });
+
+    await vendorsApi.create(values);
+    await vendorsApi.update(7, { ...values, isActive: false });
+
+    expect(apiPost).toHaveBeenCalledWith(
+      API_PATHS.rest.vendors,
+      expect.objectContaining({
+        companyName: "Gateway Plumbing",
+        notes: values.notes,
+        companyId: 42,
+        preferredContact: "Text",
+        phone: "(314) 555-0198",
+        companyPhone: "(314) 555-0100",
+      }),
+    );
+    expect(apiPut).toHaveBeenCalledWith(
+      `${API_PATHS.rest.vendors}/7`,
+      expect.objectContaining({ companyName: "Gateway Plumbing", isActive: false }),
+    );
+    expect(apiPost.mock.calls[0]?.[1]).not.toHaveProperty("totalJobs");
+    expect(apiPut.mock.calls[0]?.[1]).not.toHaveProperty("totalJobs");
+  });
+
+  it("sends a null companyId when free-text company has no company link", async () => {
+    apiPost.mockResolvedValueOnce({ data: {} });
+    await vendorsApi.create({
+      companyName: "Independent Vendor LLC",
+      contactName: "Indy Tech",
+      preferredContact: "Phone",
+    });
+
+    expect(apiPost).toHaveBeenCalledWith(
+      API_PATHS.rest.vendors,
+      expect.objectContaining({ companyName: "Independent Vendor LLC", companyId: null }),
+    );
+  });
+
+  it("does not send a non-numeric company id to the integer backend contract", async () => {
+    apiPost.mockResolvedValueOnce({ data: {} });
+
+    await vendorsApi.create({
+      companyId: "co-1",
+      companyName: "Gateway Plumbing",
+      contactName: "Adam Whyte",
+    });
+
+    expect(apiPost).toHaveBeenCalledWith(
+      API_PATHS.rest.vendors,
+      expect.objectContaining({ companyId: null }),
+    );
+  });
+
+  it("preserves a legacy phone on read and unrelated write", async () => {
+    apiGet.mockResolvedValueOnce({
+      data: {
+        id: 7,
+        companyName: "Legacy Vendor",
+        contactName: "Taylor",
+        phone: "555-1234 ext 9",
+      },
+    });
+    apiPut.mockResolvedValueOnce({ data: {} });
+
+    const vendor = await vendorsApi.getById(7);
+    expect(vendor.phone).toBe("555-1234 ext 9");
+
+    await vendorsApi.update(7, { ...vendor, notes: "Updated only the notes" });
+    expect(apiPut).toHaveBeenCalledWith(
+      `${API_PATHS.rest.vendors}/7`,
+      expect.objectContaining({ phone: "555-1234 ext 9", notes: "Updated only the notes" }),
+    );
+  });
+
+  it("maps the deactivation-impact payload including linked work orders", async () => {
+    apiGet.mockResolvedValueOnce({
+      data: {
+        vendorId: 7,
+        canDeactivate: false,
+        openWorkOrders: [
+          {
+            workOrderId: 101,
+            workOrderNumber: "WO-101",
+            workOrderTitle: "Boiler repair",
+            status: "Dispatched",
+            scheduledDate: "2025-01-02",
+            dispatchId: 501,
+          },
+        ],
+      },
+    });
+
+    const impact = await vendorsApi.getDeactivationImpact(7);
+
+    expect(apiGet).toHaveBeenCalledWith(
+      `${API_PATHS.rest.vendors}/7/${API_PATHS.vendor.deactivationImpact}`,
+    );
+    expect(impact).toEqual({
+      vendorId: 7,
+      canDeactivate: false,
+      openWorkOrders: [
+        {
+          workOrderId: 101,
+          workOrderNumber: "WO-101",
+          workOrderTitle: "Boiler repair",
+          status: "Dispatched",
+          scheduledDate: "2025-01-02",
+          dispatchId: 501,
+        },
+      ],
+    });
+  });
+
+  it("deletes a vendor by id and surfaces the 409 error without retry swallowing", async () => {
+    apiDelete.mockResolvedValueOnce(undefined);
+    await vendorsApi.delete(7);
+    expect(apiDelete).toHaveBeenCalledWith(`${API_PATHS.rest.vendors}/7`);
+
+    const conflict = Object.assign(new Error("Conflict"), { response: { status: 409 } });
+    apiDelete.mockRejectedValueOnce(conflict);
+    await expect(vendorsApi.delete(8)).rejects.toThrow("Conflict");
+  });
+});
diff --git a/src/test/domain/vendors/schemas/vendor-schema.test.ts b/src/test/domain/vendors/schemas/vendor-schema.test.ts
new file mode 100644
index 00000000..244c2b8e
--- /dev/null
+++ b/src/test/domain/vendors/schemas/vendor-schema.test.ts
@@ -0,0 +1,62 @@
+import { describe, expect, it } from "vitest";
+import { vendorSchema } from "@/domain/vendors/schemas/vendor-schema";
+
+const validVendor = {
+  companyName: "Gateway Plumbing",
+  contactName: "Adam Whyte",
+  email: "dispatch@gateway.test",
+  phone: "(314) 555-0198",
+  googleMapsUrl: "https://maps.google.com/gateway",
+};
+
+describe("vendorSchema", () => {
+  it("requires both the company and technician identity", () => {
+    const result = vendorSchema.safeParse({ ...validVendor, companyName: "", contactName: "" });
+    expect(result.success).toBe(false);
+    if (!result.success) {
+      expect(result.error.flatten().fieldErrors.companyName).toContain("Company is required");
+      expect(result.error.flatten().fieldErrors.contactName).toContain(
+        "Technician name is required",
+      );
+    }
+  });
+
+  it("accepts an empty optional email and HTTPS map URL", () => {
+    expect(vendorSchema.safeParse({ ...validVendor, email: "" }).success).toBe(true);
+  });
+
+  it("rejects malformed email and non-HTTPS map links", () => {
+    expect(
+      vendorSchema.safeParse({
+        ...validVendor,
+        email: "not-an-email",
+        googleMapsUrl: "http://maps.google.com/gateway",
+      }).success,
+    ).toBe(false);
+  });
+
+  it("accepts canonicalizable North American phones and rejects partials", () => {
+    expect(vendorSchema.safeParse({ ...validVendor, phone: "", companyPhone: "" }).success).toBe(
+      true,
+    );
+    expect(vendorSchema.safeParse({ ...validVendor, companyPhone: "(314) 555-0100" }).success).toBe(
+      true,
+    );
+    expect(vendorSchema.safeParse({ ...validVendor, phone: "314-555-0198" }).success).toBe(true);
+    expect(vendorSchema.safeParse({ ...validVendor, phone: "+1 314 555 0198" }).success).toBe(true);
+    expect(vendorSchema.safeParse({ ...validVendor, phone: "(314)" }).success).toBe(false);
+  });
+
+  it("accepts a nullable companyId and a known preferred contact value", () => {
+    expect(
+      vendorSchema.safeParse({ ...validVendor, companyId: null, preferredContact: "Text" }).success,
+    ).toBe(true);
+    expect(
+      vendorSchema.safeParse({ ...validVendor, companyId: 42, preferredContact: "Email" }).success,
+    ).toBe(true);
+  });
+
+  it("rejects an unknown preferred contact value", () => {
+    expect(vendorSchema.safeParse({ ...validVendor, preferredContact: "Fax" }).success).toBe(false);
+  });
+});
diff --git a/src/test/domain/vendors/use-cases/use-vendor-facets.test.tsx b/src/test/domain/vendors/use-cases/use-vendor-facets.test.tsx
new file mode 100644
index 00000000..c732e116
--- /dev/null
+++ b/src/test/domain/vendors/use-cases/use-vendor-facets.test.tsx
@@ -0,0 +1,86 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { renderHook, waitFor } from "@testing-library/react";
+import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
+import type { ReactNode } from "react";
+
+const getFacets = vi.fn();
+
+vi.mock("@/domain/vendors/api/vendors-api", () => ({
+  vendorsApi: { getFacets: (...args: unknown[]) => getFacets(...args) },
+}));
+
+import { useVendorFacets } from "@/domain/vendors/use-cases/use-vendor-facets";
+import { queryKeys } from "@/infra/query-key/query-key";
+
+const emptyFacets = { companies: [], trades: [], locations: [], jobBuckets: [] };
+const activeFacets = { ...emptyFacets, companies: [{ name: "Active Co" }] };
+const inactiveFacets = { ...emptyFacets, companies: [{ name: "Inactive Co" }] };
+
+function createClient(): QueryClient {
+  return new QueryClient({
+    defaultOptions: { queries: { retry: false } },
+  });
+}
+
+function makeWrapper(client: QueryClient) {
+  return function Wrapper({ children }: { children: ReactNode }) {
+    return <QueryClientProvider client={client}>{children}</QueryClientProvider>;
+  };
+}
+
+describe("useVendorFacets", () => {
+  beforeEach(() => {
+    getFacets.mockReset();
+  });
+
+  it("switches facet requests true/false as the tab scope changes", async () => {
+    getFacets.mockResolvedValue(activeFacets);
+    const { rerender } = renderHook(({ isActive }) => useVendorFacets(isActive), {
+      initialProps: { isActive: true as boolean | undefined },
+      wrapper: makeWrapper(createClient()),
+    });
+
+    await waitFor(() => expect(getFacets).toHaveBeenCalledWith({ isActive: true }));
+
+    getFacets.mockResolvedValue(inactiveFacets);
+    rerender({ isActive: false });
+    await waitFor(() => expect(getFacets).toHaveBeenCalledWith({ isActive: false }));
+
+    getFacets.mockResolvedValue(activeFacets);
+    rerender({ isActive: undefined });
+    await waitFor(() => expect(getFacets).toHaveBeenCalledWith(undefined));
+  });
+
+  it("scopes the cache so active, inactive, and unscoped keys cannot collide", () => {
+    const active = queryKeys.vendors.facets(true);
+    const inactive = queryKeys.vendors.facets(false);
+    const unscoped = queryKeys.vendors.facets();
+
+    expect(active).not.toEqual(inactive);
+    expect(active).not.toEqual(unscoped);
+    expect(inactive).not.toEqual(unscoped);
+    expect(active[active.length - 1]).toBe(true);
+    expect(inactive[inactive.length - 1]).toBe(false);
+    expect(unscoped[unscoped.length - 1]).toBeNull();
+  });
+
+  it("reuses the cached facet entry when returning to a previous scope", async () => {
+    getFacets.mockResolvedValue(activeFacets);
+    const client = createClient();
+    const { result, rerender } = renderHook(({ isActive }) => useVendorFacets(isActive), {
+      initialProps: { isActive: true as boolean | undefined },
+      wrapper: makeWrapper(client),
+    });
+
+    await waitFor(() => expect(getFacets).toHaveBeenCalledTimes(1));
+
+    getFacets.mockResolvedValue(inactiveFacets);
+    rerender({ isActive: false });
+    await waitFor(() => expect(getFacets).toHaveBeenCalledTimes(2));
+
+    getFacets.mockClear();
+    rerender({ isActive: true });
+    await waitFor(() => expect(result.current.data).toEqual(activeFacets));
+    expect(getFacets).not.toHaveBeenCalled();
+  });
+});
diff --git a/src/test/domain/work-orders/api/work-orders-api.test.ts b/src/test/domain/work-orders/api/work-orders-api.test.ts
index 32040a19..f44e7b30 100644
--- a/src/test/domain/work-orders/api/work-orders-api.test.ts
+++ b/src/test/domain/work-orders/api/work-orders-api.test.ts
@@ -2,9 +2,11 @@ import { beforeEach, describe, expect, it, vi } from "vitest";
 import { API_PATHS } from "@/api/api-paths";
 
 const apiGet = vi.fn();
+const apiPut = vi.fn();
 
 vi.mock("@/api/api", () => ({
   apiGet: (...args: unknown[]) => apiGet(...args),
+  apiPut: (...args: unknown[]) => apiPut(...args),
   apiPost: vi.fn(),
   apiDelete: vi.fn(),
   apiPostNoContent: vi.fn(),
@@ -15,6 +17,7 @@ import { workOrdersApi } from "@/domain/work-orders/api/work-orders-api";
 describe("workOrdersApi.getById", () => {
   beforeEach(() => {
     apiGet.mockReset();
+    apiPut.mockReset();
     apiGet.mockResolvedValue({
       Id: 10,
       title: "Test WO",
@@ -22,6 +25,22 @@ describe("workOrdersApi.getById", () => {
     });
   });
 
+  it("updates only the assigned vendor through the work-order-scoped endpoint", async () => {
+    apiPut.mockResolvedValueOnce(undefined);
+    const payload = {
+      workOrderId: 10,
+      contactName: "Taylor Tech",
+      preferredContact: "Text" as const,
+      phone: "(314) 555-0199",
+      email: "taylor@example.com",
+      notes: "Text before arrival",
+    };
+
+    await workOrdersApi.updateVendorFromWorkOrder(7, payload);
+
+    expect(apiPut).toHaveBeenCalledWith(`${API_PATHS.rest.vendors}/7/work-order-update`, payload);
+  });
+
   it("calls GetWorkorderById with id query param, not path suffix", async () => {
     await workOrdersApi.getById(10);
 
diff --git a/src/test/domain/work-orders/mappers/work-order-mapper.test.ts b/src/test/domain/work-orders/mappers/work-order-mapper.test.ts
index a9dfc9bf..632fa346 100644
--- a/src/test/domain/work-orders/mappers/work-order-mapper.test.ts
+++ b/src/test/domain/work-orders/mappers/work-order-mapper.test.ts
@@ -1,5 +1,26 @@
 import { describe, expect, it } from "vitest";
-import { mapUpliftRequest } from "@/domain/work-orders/mappers/work-order-mapper";
+import {
+  mapUpliftRequest,
+  mapWorkOrderDispatchSummary,
+} from "@/domain/work-orders/mappers/work-order-mapper";
+
+describe("mapWorkOrderDispatchSummary", () => {
+  it("preserves the assigned vendor identity needed by inline editing", () => {
+    expect(
+      mapWorkOrderDispatchSummary({
+        Id: 21,
+        VendorId: 7,
+        VendorName: "Gateway Plumbing",
+        VendorEmail: "dispatch@gateway.test",
+      }),
+    ).toMatchObject({
+      id: 21,
+      vendorId: 7,
+      vendorName: "Gateway Plumbing",
+      vendorEmail: "dispatch@gateway.test",
+    });
+  });
+});
 
 describe("mapUpliftRequest", () => {
   it("maps decided uplift fields from PascalCase payload", () => {