fix(work-orders): preserve staged vendor selection

src/app/(protected)/workorders/_components/list/table/cells/use-vendor-dialog-form.ts

@@ -146,9 +146,9 @@ export function useVendorDialogForm({
     handleCompanyPick: (nextCompany: string) => {
       const selectedOption = technicianOptions.find((option) => option.key === selectedKey);
       setSelectedCompany(nextCompany);
-      setAddedVendors([]);
-      setPendingCreates({});
       if (selectedOption?.company !== nextCompany) {
+        setAddedVendors([]);
+        setPendingCreates({});
         setSelectedKey("");
         setT("");
         setPhone("");

src/app/(protected)/workorders/_components/list/table/cells/vendor-dialog-can-submit.ts

@@ -21,7 +21,6 @@ export function computeVendorDialogCanSubmit({
     current.company !== baseline.company ||
     current.selectedKey !== baseline.selectedKey ||
     current.phone !== baseline.phone ||
-    current.notes !== baseline.notes ||
     current.pendingCreateCount !== baseline.pendingCreateCount;
   return valid && (dirty || hasNewTechs);
 }

src/app/(protected)/workorders/_components/list/table/cells/vendor-dialog-footer.tsx

@@ -44,6 +44,7 @@ export function VendorDialogFooter({
       <Button
         className="min-h-0 px-3 py-1 text-[12px]"
         disabled={isPending}
+        aria-disabled={!canSubmit && !isPending}
         // why: AAP Save stays clickable; native disabled would change the no-op look-disabled gate.
         sx={canSubmit || isPending ? undefined : lookDisabledSx}
         onClick={() => {

src/test/app/(protected)/workorders/vendor-dialog-can-submit.test.ts

@@ -57,13 +57,13 @@ describe("computeVendorDialogCanSubmit", () => {
     ).toBe(true);
   });
 
-  it("allows save when notes change on a valid company", () => {
+  it("rejects notes-only changes because notes are not persisted", () => {
     expect(
       computeVendorDialogCanSubmit({
         current: { ...assigned, notes: "Call before arrival" },
         baseline: assigned,
       }),
-    ).toBe(true);
+    ).toBe(false);
   });
 
   it("does not allow notes-only save without a company or technician", () => {

src/test/app/(protected)/workorders/vendor-dialog-save-gate.test.tsx

@@ -69,6 +69,7 @@ describe("VendorDialog save gate", () => {
     expect(screen.getByRole("button", { name: /pick a company first/i })).toBeDisabled();
     const save = screen.getByRole("button", { name: /^save$/i });
     expect(save).not.toBeDisabled();
+    expect(save).toHaveAttribute("aria-disabled", "true");
     expect(save).toHaveStyle({ opacity: "0.5", cursor: "not-allowed" });
     fireEvent.click(save);
     expect(onSave).not.toHaveBeenCalled();
@@ -147,12 +148,12 @@ describe("VendorDialog save gate", () => {
     expect(screen.queryByRole("button", { name: "Casey New" })).not.toBeInTheDocument();
   });
 
-  it("persists after notes change on an existing assignment", () => {
+  it("does not persist after a notes-only change", () => {
     const onSave = renderAssigned();
     fireEvent.change(screen.getByPlaceholderText("Contact preferences, availability, etc."), {
       target: { value: "Gate code 12" },
     });
     fireEvent.click(screen.getByRole("button", { name: /^save$/i }));
-    expect(onSave).toHaveBeenCalledTimes(1);
+    expect(onSave).not.toHaveBeenCalled();
   });
 });

src/test/app/(protected)/workorders/vendor-dialog-stable-identity.test.tsx

@@ -175,4 +175,56 @@ describe("VendorDialog stable technician identity", () => {
       );
     });
   });
+
+  it("keeps a staged draft when the same company is picked again", async () => {
+    const onSave = vi.fn();
+    mutateAsync.mockResolvedValue({
+      ...createdVendor,
+      id: 88,
+      contactName: "Casey New",
+      phone: "3145550188",
+    });
+
+    renderWithProviders(
+      <VendorDialog
+        open={true}
+        onOpenChange={vi.fn()}
+        vendorId={10}
+        company="Gateway Plumbing"
+        tech="Jordan Lee"
+        techPhone="(314) 555-0100"
+        vendors={[existingVendor]}
+        onSave={onSave}
+      />,
+    );
+
+    fireEvent.click(screen.getByRole("button", { name: /\+ add technician/i }));
+    fireEvent.change(screen.getByPlaceholderText("Full name"), {
+      target: { value: "Casey New" },
+    });
+    fireEvent.change(screen.getByPlaceholderText("(000) 000-0000"), {
+      target: { value: "3145550188" },
+    });
+    fireEvent.click(screen.getByRole("button", { name: /^add$/i }));
+
+    fireEvent.click(screen.getByRole("button", { name: "Gateway Plumbing" }));
+    const companyButtons = await screen.findAllByRole("button", { name: "Gateway Plumbing" });
+    fireEvent.click(companyButtons[companyButtons.length - 1]!);
+    fireEvent.click(screen.getByRole("button", { name: /^save$/i }));
+
+    await waitFor(() => {
+      expect(mutateAsync).toHaveBeenCalledWith(
+        expect.objectContaining({
+          contactName: "Casey New",
+          phone: "3145550188",
+        }),
+      );
+    });
+    expect(onSave).toHaveBeenCalledWith(
+      expect.objectContaining({
+        vendorId: "88",
+        tech: "Casey New",
+      }),
+    );
+  });
 });