diff --git a/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-detail.png b/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-detail.png
index fb36ec63..52d00495 100644
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diff --git a/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-filters.png b/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-filters.png
index 21809dbd..f9ab4659 100644
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diff --git a/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-list.png b/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-list.png
index a7109395..bf2ebed4 100644
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diff --git a/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-mobile-navigation.png b/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-mobile-navigation.png
index b4da848d..d812c670 100644
Binary files a/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-mobile-navigation.png and b/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-mobile-navigation.png differ
diff --git a/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-mobile.png b/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-mobile.png
index 6e98e3fa..5311388e 100644
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diff --git a/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-new.png b/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-new.png
index 6fdfb70d..0c225e74 100644
Binary files a/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-new.png and b/e2e/__screenshots__/work-orders/work-orders.visual.spec.ts/wo-new.png differ
diff --git a/src/app/(protected)/workorders/_components/detail/tabs/slide-over-info-tab-edit-view.tsx b/src/app/(protected)/workorders/_components/detail/tabs/slide-over-info-tab-edit-view.tsx
index dbb11c52..fe420159 100644
--- a/src/app/(protected)/workorders/_components/detail/tabs/slide-over-info-tab-edit-view.tsx
+++ b/src/app/(protected)/workorders/_components/detail/tabs/slide-over-info-tab-edit-view.tsx
@@ -121,7 +121,7 @@ export function SlideOverInfoTabEditView({
           onSave={(dueDate) => onDraftChange({ dueDate })}
         />
       </SlideOverInfoRow>
-      <SlideOverInfoRow label="Appt Time">
+      <SlideOverInfoRow label="Appt Time (optional)">
         <ApptTimeCell
           apptTime={draft.apptTime}
           onSave={(apptTime) => onDraftChange({ apptTime })}
diff --git a/src/app/(protected)/workorders/_components/list/advanced-search/adv-parity-filter-sections.tsx b/src/app/(protected)/workorders/_components/list/advanced-search/adv-parity-filter-sections.tsx
index 3bb9ecbd..c5189fab 100644
--- a/src/app/(protected)/workorders/_components/list/advanced-search/adv-parity-filter-sections.tsx
+++ b/src/app/(protected)/workorders/_components/list/advanced-search/adv-parity-filter-sections.tsx
@@ -41,6 +41,7 @@ function indicatorCount(draft: WorkOrderAdvancedFilters): number {
 function FlagColorDot({ value }: { value: string }) {
   return (
     <span
+      aria-hidden="true"
       className="size-3 shrink-0 rounded-full"
       style={{ background: value, border: "1px solid var(--color-border)" }}
     />
diff --git a/src/app/(protected)/workorders/_components/list/table/cells/appt-time-cell.tsx b/src/app/(protected)/workorders/_components/list/table/cells/appt-time-cell.tsx
index 1c9d160f..e43832d2 100644
--- a/src/app/(protected)/workorders/_components/list/table/cells/appt-time-cell.tsx
+++ b/src/app/(protected)/workorders/_components/list/table/cells/appt-time-cell.tsx
@@ -3,10 +3,12 @@ import { Clock } from "lucide-react";
 import { Button, Popover } from "@mui/material";
 import { Text } from "@/components/ui/text";
 import {
-  calcDuration,
+  apptTimePopoverHint,
+  commitApptTimeSelection,
+} from "@/domain/work-orders/utils/appt-time-selection";
+import {
   fmt12,
   formatApptRange,
-  formatApptTimeValue,
   parseApptTime,
   TIME_SLOTS,
 } from "@/domain/work-orders/utils/wizard-date-utils";
@@ -17,6 +19,62 @@ type ApptTimeCellProps = {
   onSave: (value: string) => void;
 };
 
+const SLOT_HEADER_SX = {
+  fontSize: 10,
+  fontWeight: 600,
+  textTransform: "uppercase" as const,
+  letterSpacing: "0.05em",
+  color: "var(--color-text-muted)",
+};
+
+function slotStyle(active: boolean): React.CSSProperties {
+  return {
+    background: active ? "var(--color-primary-tint)" : "transparent",
+    color: active ? "var(--color-primary)" : "var(--color-text-primary)",
+    fontWeight: active ? 600 : 400,
+  };
+}
+
+function nextStartSelection(
+  currentStart: string,
+  currentEnd: string,
+  slot: string,
+): { start: string; end: string } {
+  if (slot === currentStart) {
+    return { start: "", end: "" };
+  }
+  return {
+    start: slot,
+    end: currentEnd && currentEnd <= slot ? "" : currentEnd,
+  };
+}
+
+function ApptTimeSlotList({
+  slots,
+  active,
+  onPick,
+}: {
+  slots: string[];
+  active: string;
+  onPick: (slot: string) => void;
+}) {
+  return (
+    <div className="max-h-[220px] overflow-y-auto px-1.5 pb-1.5">
+      {slots.map((t) => (
+        <button
+          key={t}
+          type="button"
+          onClick={() => onPick(t)}
+          className="w-full rounded px-2 py-1 text-left text-xs transition-colors hover:bg-[#F9FAFB]"
+          style={slotStyle(active === t)}
+        >
+          {fmt12(t)}
+        </button>
+      ))}
+    </div>
+  );
+}
+
 export function ApptTimeCell({ apptTime, onSave }: ApptTimeCellProps) {
   const [anchorEl, setAnchorEl] = useState<HTMLElement | null>(null);
   const [start, setStart] = useState(() => parseApptTime(apptTime).start);
@@ -30,16 +88,13 @@ export function ApptTimeCell({ apptTime, onSave }: ApptTimeCellProps) {
 
   const parsed = parseApptTime(apptTime);
   const display = parsed.start ? formatApptRange(parsed.start, parsed.end) : apptTime;
+  const showPlaceholder = !display || display === "—";
+  const endSlots = TIME_SLOTS.filter((t) => !start || t > start);
 
-  const slotStyle = (active: boolean): React.CSSProperties => ({
-    background: active ? "var(--color-primary-tint)" : "transparent",
-    color: active ? "var(--color-primary)" : "var(--color-text-primary)",
-    fontWeight: active ? 600 : 400,
-  });
-
+  const close = () => setAnchorEl(null);
   const done = () => {
-    onSave(formatApptTimeValue(start, end));
-    setAnchorEl(null);
+    commitApptTimeSelection(start, end, apptTime, onSave);
+    close();
   };
 
   return (
@@ -53,91 +108,56 @@ export function ApptTimeCell({ apptTime, onSave }: ApptTimeCellProps) {
         className="group/cell flex w-full items-center gap-1.5 transition-opacity hover:opacity-80"
       >
         <Clock size={11} className="shrink-0 text-[var(--color-text-muted)]" />
-        {display && display !== "—" ? (
+        {showPlaceholder ? (
+          <span className="text-[13px] text-[var(--color-text-muted)]">Select appt time …</span>
+        ) : (
           <span className="whitespace-nowrap text-[13px] text-[var(--color-text-secondary)]">
             {display}
           </span>
-        ) : (
-          <span className="text-[13px] text-[var(--color-text-muted)]">Select …</span>
         )}
         <HoverChevron />
       </button>
       <Popover
         open={Boolean(anchorEl)}
         anchorEl={anchorEl}
-        onClose={() => setAnchorEl(null)}
+        onClose={close}
         anchorOrigin={{ vertical: "bottom", horizontal: "left" }}
         onClick={(e) => e.stopPropagation()}
         slotProps={{ paper: { className: "w-[264px] rounded-lg border border-border p-0" } }}
       >
         <div className="grid grid-cols-2 border-b border-border">
           <div className="border-r border-border">
-            <Text
-              as="p"
-              className="px-3 pb-1 pt-2"
-              style={{
-                fontSize: 10,
-                fontWeight: 600,
-                textTransform: "uppercase",
-                letterSpacing: "0.05em",
-                color: "var(--color-text-muted)",
-              }}
-            >
+            <Text as="p" className="px-3 pb-1 pt-2" style={SLOT_HEADER_SX}>
               Start
             </Text>
-            <div className="max-h-[220px] overflow-y-auto px-1.5 pb-1.5">
-              {TIME_SLOTS.map((t) => (
-                <button
-                  key={t}
-                  type="button"
-                  onClick={() => {
-                    setStart(t);
-                    if (end && end <= t) {
-                      setEnd("");
-                    }
-                  }}
-                  className="w-full rounded px-2 py-1 text-left text-xs transition-colors hover:bg-[#F9FAFB]"
-                  style={slotStyle(start === t)}
-                >
-                  {fmt12(t)}
-                </button>
-              ))}
-            </div>
+            <ApptTimeSlotList
+              slots={TIME_SLOTS}
+              active={start}
+              onPick={(t) => {
+                const next = nextStartSelection(start, end, t);
+                setStart(next.start);
+                setEnd(next.end);
+              }}
+            />
           </div>
           <div>
-            <Text
-              as="p"
-              className="px-3 pb-1 pt-2"
-              style={{
-                fontSize: 10,
-                fontWeight: 600,
-                textTransform: "uppercase",
-                letterSpacing: "0.05em",
-                color: "var(--color-text-muted)",
-              }}
-            >
+            <Text as="p" className="px-3 pb-1 pt-2" style={SLOT_HEADER_SX}>
               End <span className="font-normal normal-case">(optional)</span>
             </Text>
-            <div className="max-h-[220px] overflow-y-auto px-1.5 pb-1.5">
-              {TIME_SLOTS.filter((t) => !start || t > start).map((t) => (
-                <button
-                  key={t}
-                  type="button"
-                  onClick={() => setEnd(t)}
-                  className="w-full rounded px-2 py-1 text-left text-xs transition-colors hover:bg-[#F9FAFB]"
-                  style={slotStyle(end === t)}
-                >
-                  {fmt12(t)}
-                </button>
-              ))}
-            </div>
+            <ApptTimeSlotList
+              slots={endSlots}
+              active={end}
+              onPick={(t) => {
+                setEnd(t === end ? "" : t);
+              }}
+            />
           </div>
         </div>
         <div className="flex items-center justify-between px-3 py-2">
           <span className="text-xs text-[var(--color-text-muted)]">
-            {start && end ? calcDuration(start, end) : start ? fmt12(start) : "—"}
+            {apptTimePopoverHint(start, end)}
           </span>
-          <Button size="small" variant="contained" onClick={done} disabled={!start}>
+          <Button size="small" variant="contained" onClick={done}>
             Done
           </Button>
         </div>
diff --git a/src/app/(protected)/workorders/_components/list/table/cells/flag-cell.tsx b/src/app/(protected)/workorders/_components/list/table/cells/flag-cell.tsx
index 05c9460a..ce17fa54 100644
--- a/src/app/(protected)/workorders/_components/list/table/cells/flag-cell.tsx
+++ b/src/app/(protected)/workorders/_components/list/table/cells/flag-cell.tsx
@@ -1,7 +1,7 @@
 import { useState } from "react";
 import { Flag, X } from "lucide-react";
 import { Popover } from "@mui/material";
-import { FLAG_COLORS } from "@/domain/work-orders/flag-colors";
+import { FLAG_COLORS, flagTriggerAccessibleName } from "@/domain/work-orders/flag-colors";
 
 type FlagCellProps = {
   color?: string | null;
@@ -11,11 +11,17 @@ type FlagCellProps = {
 
 export function FlagCell({ color, disabled, onChange }: FlagCellProps) {
   const [anchorEl, setAnchorEl] = useState<HTMLElement | null>(null);
+  const triggerName = flagTriggerAccessibleName(color);
+  const popoverOpen = Boolean(anchorEl);
 
   if (disabled) {
     return (
-      <span className="flex h-[22px] w-[22px] items-center justify-center opacity-30">
-        <Flag size={14} />
+      <span
+        role="img"
+        className="flex h-[22px] w-[22px] items-center justify-center opacity-30"
+        aria-label={triggerName}
+      >
+        <Flag size={14} aria-hidden="true" />
       </span>
     );
   }
@@ -24,15 +30,19 @@ export function FlagCell({ color, disabled, onChange }: FlagCellProps) {
     <>
       <button
         type="button"
+        aria-label={triggerName}
+        aria-haspopup="dialog"
+        aria-expanded={popoverOpen}
+        title={triggerName}
         onClick={(e) => {
           e.stopPropagation();
           setAnchorEl(e.currentTarget);
         }}
-        title={color ? "Flagged — click to change" : "Add color flag"}
-        className="flex h-[22px] w-[22px] items-center justify-center transition-opacity hover:opacity-80"
+        className="flex h-[22px] w-[22px] items-center justify-center transition-opacity hover:opacity-80 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-1 focus-visible:outline-[var(--color-primary)]"
       >
         <Flag
           size={14}
+          aria-hidden="true"
           strokeWidth={color ? 1.5 : 1.75}
           style={{
             color: color ?? "var(--color-text-muted)",
@@ -41,37 +51,48 @@ export function FlagCell({ color, disabled, onChange }: FlagCellProps) {
         />
       </button>
       <Popover
-        open={Boolean(anchorEl)}
+        open={popoverOpen}
         anchorEl={anchorEl}
         onClose={() => setAnchorEl(null)}
         anchorOrigin={{ vertical: "bottom", horizontal: "left" }}
         onClick={(e) => e.stopPropagation()}
-        slotProps={{ paper: { className: "rounded-lg border border-border p-2" } }}
+        slotProps={{
+          paper: {
+            className: "rounded-lg border border-border p-2",
+            role: "dialog",
+            "aria-label": "Choose flag color",
+          },
+        }}
       >
         <div className="grid grid-cols-4 gap-1.5">
-          {FLAG_COLORS.map((c) => (
-            <button
-              key={c.value}
-              type="button"
-              title={c.name}
-              onClick={() => {
-                onChange(c.value);
-                setAnchorEl(null);
-              }}
-              className="flex h-7 w-7 items-center justify-center rounded transition-transform hover:scale-110"
-            >
-              <span
-                className="rounded-full"
-                style={{
-                  width: 18,
-                  height: 18,
-                  background: c.value,
-                  boxShadow:
-                    color === c.value ? `0 0 0 2px var(--card), 0 0 0 4px ${c.value}` : "none",
+          {FLAG_COLORS.map((c) => {
+            const selected = color === c.value;
+            return (
+              <button
+                key={c.value}
+                type="button"
+                aria-label={c.name}
+                aria-pressed={selected}
+                title={c.name}
+                onClick={() => {
+                  onChange(c.value);
+                  setAnchorEl(null);
                 }}
-              />
-            </button>
-          ))}
+                className="flex h-7 w-7 items-center justify-center rounded transition-transform hover:scale-110 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-1 focus-visible:outline-[var(--color-primary)]"
+              >
+                <span
+                  aria-hidden="true"
+                  className="rounded-full"
+                  style={{
+                    width: 18,
+                    height: 18,
+                    background: c.value,
+                    boxShadow: selected ? `0 0 0 2px var(--card), 0 0 0 4px ${c.value}` : "none",
+                  }}
+                />
+              </button>
+            );
+          })}
         </div>
         <button
           type="button"
@@ -81,7 +102,7 @@ export function FlagCell({ color, disabled, onChange }: FlagCellProps) {
           }}
           className="mt-2 flex w-full items-center gap-1.5 border-t border-border px-1 pt-2 text-xs text-[var(--color-text-secondary)] transition-colors hover:opacity-80"
         >
-          <X size={12} /> Clear flag
+          <X size={12} aria-hidden="true" /> Clear flag
         </button>
       </Popover>
     </>
diff --git a/src/app/(protected)/workorders/_components/list/table/wo-table-cols.ts b/src/app/(protected)/workorders/_components/list/table/wo-table-cols.ts
index 12194252..96b1caa2 100644
--- a/src/app/(protected)/workorders/_components/list/table/wo-table-cols.ts
+++ b/src/app/(protected)/workorders/_components/list/table/wo-table-cols.ts
@@ -1,6 +1,6 @@
 export const WO_TABLE_COLS = [
   { key: "grip", label: "", w: 28 },
-  { key: "flag", label: "", w: 28 },
+  { key: "flag", label: "", srLabel: "Flag", w: 28 },
   { key: "site", label: "SITE", w: 168 },
   { key: "wo", label: "WO", w: 120 },
   { key: "type", label: "TYPE OF WO", w: 108 },
diff --git a/src/app/(protected)/workorders/_components/list/table/wo-table-head.tsx b/src/app/(protected)/workorders/_components/list/table/wo-table-head.tsx
index 36309923..c490f17e 100644
--- a/src/app/(protected)/workorders/_components/list/table/wo-table-head.tsx
+++ b/src/app/(protected)/workorders/_components/list/table/wo-table-head.tsx
@@ -4,27 +4,32 @@ export function WoTableHead() {
   return (
     <thead className="sticky top-0 z-10">
       <tr>
-        {WO_TABLE_COLS.map((col) => (
-          <th
-            key={col.key}
-            style={{
-              width: col.w,
-              minWidth: col.w,
-              padding: "11px 14px",
-              textAlign: "left",
-              fontSize: 10.5,
-              fontWeight: 700,
-              textTransform: "uppercase",
-              letterSpacing: "0.06em",
-              color: "var(--foreground)",
-              whiteSpace: "nowrap",
-              background: "var(--color-bg-muted)",
-              borderBottom: "1px solid var(--border)",
-            }}
-          >
-            {col.label}
-          </th>
-        ))}
+        {WO_TABLE_COLS.map((col) => {
+          const srLabel = "srLabel" in col ? col.srLabel : undefined;
+          return (
+            <th
+              key={col.key}
+              scope="col"
+              style={{
+                width: col.w,
+                minWidth: col.w,
+                padding: "11px 14px",
+                textAlign: "left",
+                fontSize: 10.5,
+                fontWeight: 700,
+                textTransform: "uppercase",
+                letterSpacing: "0.06em",
+                color: "var(--foreground)",
+                whiteSpace: "nowrap",
+                background: "var(--color-bg-muted)",
+                borderBottom: "1px solid var(--border)",
+              }}
+            >
+              {col.label}
+              {Boolean(srLabel) && <span className="sr-only">{srLabel}</span>}
+            </th>
+          );
+        })}
       </tr>
     </thead>
   );
diff --git a/src/app/(protected)/workorders/_components/list/table/wo-table-inline-row.tsx b/src/app/(protected)/workorders/_components/list/table/wo-table-inline-row.tsx
index 79432d66..f6258ee0 100644
--- a/src/app/(protected)/workorders/_components/list/table/wo-table-inline-row.tsx
+++ b/src/app/(protected)/workorders/_components/list/table/wo-table-inline-row.tsx
@@ -118,7 +118,12 @@ export function WoTableInlineRow({
       <td style={{ padding: "0 0 0 6px" }} />
 
       <td style={{ padding: "0 2px 0 8px" }}>
-        <Flag size={14} strokeWidth={1.75} style={{ color: "var(--color-border)" }} />
+        <Flag
+          size={14}
+          strokeWidth={1.75}
+          aria-hidden="true"
+          style={{ color: "var(--color-border)" }}
+        />
       </td>
 
       <WoTableInlineRowCells
diff --git a/src/domain/work-orders/flag-colors.ts b/src/domain/work-orders/flag-colors.ts
index d4cf32a7..fe616bd8 100644
--- a/src/domain/work-orders/flag-colors.ts
+++ b/src/domain/work-orders/flag-colors.ts
@@ -11,3 +11,23 @@ export const FLAG_COLORS: { name: string; value: string }[] = [
 ];
 
 export const FLAG_COLOR_VALUES = FLAG_COLORS.map((c) => c.value);
+
+export function flagColorName(value: string | null | undefined): string | null {
+  if (!value) {
+    return null;
+  }
+  const normalized = value.toLowerCase();
+  return FLAG_COLORS.find((color) => color.value.toLowerCase() === normalized)?.name ?? null;
+}
+
+/** Accessible trigger name — never color-only. */
+export function flagTriggerAccessibleName(color: string | null | undefined): string {
+  const name = flagColorName(color);
+  if (name) {
+    return `${name} flag`;
+  }
+  if (color) {
+    return "Flagged";
+  }
+  return "Add flag";
+}
diff --git a/src/domain/work-orders/mappers/assign-wizard-vendor-appt-fields.ts b/src/domain/work-orders/mappers/assign-wizard-vendor-appt-fields.ts
index 33f8303e..43179ba9 100644
--- a/src/domain/work-orders/mappers/assign-wizard-vendor-appt-fields.ts
+++ b/src/domain/work-orders/mappers/assign-wizard-vendor-appt-fields.ts
@@ -2,7 +2,10 @@ import type { WorkOrderBoardCreatePayload } from "@/domain/work-orders/types/wor
 import type { WorkOrderWizardDraft } from "@/domain/work-orders/types/work-order-wizard";
 import { formatApptTimeValue } from "@/domain/work-orders/utils/wizard-date-utils";
 
-/** Mutates `payload` with `vendorId` and, when applicable, single-day appt date/time. */
+/**
+ * Mutates `payload` with `vendorId` and, when applicable, single-day appt date/time.
+ * Board create rejects appointment fields without vendorId (`DispatchRequired`).
+ */
 export function assignWizardVendorApptFields(
   payload: WorkOrderBoardCreatePayload,
   draft: WorkOrderWizardDraft,
diff --git a/src/domain/work-orders/utils/appt-time-selection.ts b/src/domain/work-orders/utils/appt-time-selection.ts
new file mode 100644
index 00000000..3ed8c19b
--- /dev/null
+++ b/src/domain/work-orders/utils/appt-time-selection.ts
@@ -0,0 +1,33 @@
+import {
+  calcDuration,
+  formatApptTimeValue,
+  parseApptTime,
+} from "@/domain/work-orders/utils/wizard-date-utils";
+
+export function apptTimePopoverHint(start: string, end: string): string {
+  if (start && end) {
+    const duration = calcDuration(start, end);
+    return duration ? `Duration: ${duration}` : "—";
+  }
+  if (start) {
+    return "Pick end (optional)";
+  }
+  return "Pick a start time";
+}
+
+export function commitApptTimeSelection(
+  start: string,
+  end: string,
+  apptTime: string,
+  onSave: (value: string) => void,
+): void {
+  if (start) {
+    onSave(formatApptTimeValue(start, end));
+    return;
+  }
+  const parsed = parseApptTime(apptTime);
+  const isRawUnparsed = Boolean(apptTime.trim()) && !parsed.start;
+  if (!isRawUnparsed) {
+    onSave("");
+  }
+}
diff --git a/src/domain/work-orders/utils/wizard-date-utils.ts b/src/domain/work-orders/utils/wizard-date-utils.ts
index 1d1f757b..48a5ddfd 100644
--- a/src/domain/work-orders/utils/wizard-date-utils.ts
+++ b/src/domain/work-orders/utils/wizard-date-utils.ts
@@ -151,6 +151,13 @@ export function parseApptTime(appt: string): { start: string; end: string } {
     }
     return { start: `${pad2(h)}:${single[2]}`, end: "" };
   }
+  const startOnly = appt.trim().match(/^(\d{1,2}):(\d{2})$/);
+  if (startOnly) {
+    return {
+      start: `${startOnly[1].padStart(2, "0")}:${startOnly[2]}`,
+      end: "",
+    };
+  }
   return { start: "", end: "" };
 }
 
diff --git a/src/test/app/(protected)/workorders/appt-time-cell.test.tsx b/src/test/app/(protected)/workorders/appt-time-cell.test.tsx
new file mode 100644
index 00000000..07012d32
--- /dev/null
+++ b/src/test/app/(protected)/workorders/appt-time-cell.test.tsx
@@ -0,0 +1,140 @@
+import { render, screen } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { describe, expect, it, vi } from "vitest";
+import { ApptTimeCell } from "@/app/(protected)/workorders/_components/list/table/cells/appt-time-cell";
+import {
+  apptTimePopoverHint,
+  commitApptTimeSelection,
+} from "@/domain/work-orders/utils/appt-time-selection";
+import { fmt12, formatApptRange } from "@/domain/work-orders/utils/wizard-date-utils";
+
+describe("apptTimePopoverHint", () => {
+  it("asks for start when empty", () => {
+    expect(apptTimePopoverHint("", "")).toBe("Pick a start time");
+  });
+
+  it("marks end as optional after start", () => {
+    expect(apptTimePopoverHint("08:00", "")).toBe("Pick end (optional)");
+  });
+
+  it("prefixes duration when both ends are set", () => {
+    expect(apptTimePopoverHint("08:00", "10:00")).toBe("Duration: 2h");
+  });
+});
+
+describe("commitApptTimeSelection", () => {
+  it("saves an empty string when start is empty and the current value parses empty", () => {
+    const onSave = vi.fn();
+    commitApptTimeSelection("", "", "", onSave);
+    expect(onSave).toHaveBeenCalledWith("");
+  });
+
+  it("does not clear a raw unparsed appointment label", () => {
+    const onSave = vi.fn();
+    commitApptTimeSelection("", "", "AM before 2pm", onSave);
+    expect(onSave).not.toHaveBeenCalled();
+  });
+
+  it("clears a stored start-only time when Start is empty", () => {
+    const onSave = vi.fn();
+    commitApptTimeSelection("", "", "09:00", onSave);
+    expect(onSave).toHaveBeenCalledWith("");
+  });
+
+  it("saves start only when end is omitted", () => {
+    const onSave = vi.fn();
+    commitApptTimeSelection("09:00", "", "", onSave);
+    expect(onSave).toHaveBeenCalledWith("09:00");
+  });
+
+  it("saves an en-dash range when both slots are set", () => {
+    const onSave = vi.fn();
+    commitApptTimeSelection("09:00", "11:00", "", onSave);
+    expect(onSave).toHaveBeenCalledWith("09:00 – 11:00");
+  });
+});
+
+describe("ApptTimeCell", () => {
+  it("shows the AAP empty placeholder", () => {
+    render(<ApptTimeCell apptTime="" onSave={vi.fn()} />);
+    expect(screen.getByRole("button", { name: /select appt time/i })).toBeInTheDocument();
+  });
+
+  it("lets Done confirm an empty selection", async () => {
+    const user = userEvent.setup();
+    const onSave = vi.fn();
+    render(<ApptTimeCell apptTime="" onSave={onSave} />);
+
+    await user.click(screen.getByRole("button", { name: /select appt time/i }));
+    const done = await screen.findByRole("button", { name: /^done$/i });
+    expect(done).toBeEnabled();
+    expect(screen.getByText("Pick a start time")).toBeInTheDocument();
+    await user.click(done);
+
+    expect(onSave).toHaveBeenCalledWith("");
+  });
+
+  it("saves start and optional end", async () => {
+    const user = userEvent.setup();
+    const onSave = vi.fn();
+    render(<ApptTimeCell apptTime="" onSave={onSave} />);
+
+    await user.click(screen.getByRole("button", { name: /select appt time/i }));
+    const startSlots = await screen.findAllByRole("button", { name: fmt12("09:00") });
+    await user.click(startSlots[0]!);
+    const endSlots = screen.getAllByRole("button", { name: fmt12("11:00") });
+    await user.click(endSlots[endSlots.length - 1]!);
+    await user.click(screen.getByRole("button", { name: /^done$/i }));
+
+    expect(onSave).toHaveBeenCalledWith("09:00 – 11:00");
+  });
+
+  it("keeps an unparsed label when Done is pressed without a start slot", async () => {
+    const user = userEvent.setup();
+    const onSave = vi.fn();
+    render(<ApptTimeCell apptTime="AM before 2pm" onSave={onSave} />);
+
+    await user.click(screen.getByRole("button", { name: /am before 2pm/i }));
+    await user.click(await screen.findByRole("button", { name: /^done$/i }));
+
+    expect(onSave).not.toHaveBeenCalled();
+  });
+
+  it("clears optional end when the selected end slot is toggled off", async () => {
+    const user = userEvent.setup();
+    const onSave = vi.fn();
+    render(<ApptTimeCell apptTime="09:00 – 11:00" onSave={onSave} />);
+
+    await user.click(screen.getByRole("button", { name: formatApptRange("09:00", "11:00") }));
+    const endSlots = await screen.findAllByRole("button", { name: fmt12("11:00") });
+    await user.click(endSlots[endSlots.length - 1]!);
+    await user.click(screen.getByRole("button", { name: /^done$/i }));
+
+    expect(onSave).toHaveBeenCalledWith("09:00");
+  });
+
+  it("clears start and end when the selected start slot is toggled off", async () => {
+    const user = userEvent.setup();
+    const onSave = vi.fn();
+    render(<ApptTimeCell apptTime="09:00 – 11:00" onSave={onSave} />);
+
+    await user.click(screen.getByRole("button", { name: formatApptRange("09:00", "11:00") }));
+    const startSlots = await screen.findAllByRole("button", { name: fmt12("09:00") });
+    await user.click(startSlots[0]!);
+    await user.click(screen.getByRole("button", { name: /^done$/i }));
+
+    expect(onSave).toHaveBeenCalledWith("");
+  });
+
+  it("hydrates start-only stored times so Done can clear them", async () => {
+    const user = userEvent.setup();
+    const onSave = vi.fn();
+    render(<ApptTimeCell apptTime="09:00" onSave={onSave} />);
+
+    await user.click(screen.getByRole("button", { name: fmt12("09:00") }));
+    expect(await screen.findByText("Pick end (optional)")).toBeInTheDocument();
+    await user.click(screen.getByRole("button", { name: /^done$/i }));
+
+    expect(onSave).toHaveBeenCalledWith("09:00");
+  });
+});
diff --git a/src/test/app/(protected)/workorders/flag-cell.test.tsx b/src/test/app/(protected)/workorders/flag-cell.test.tsx
new file mode 100644
index 00000000..db90e884
--- /dev/null
+++ b/src/test/app/(protected)/workorders/flag-cell.test.tsx
@@ -0,0 +1,59 @@
+import { fireEvent, render, screen, within } from "@testing-library/react";
+import { describe, expect, it, vi } from "vitest";
+import { FlagCell } from "@/app/(protected)/workorders/_components/list/table/cells/flag-cell";
+import { WoTableHead } from "@/app/(protected)/workorders/_components/list/table/wo-table-head";
+
+function flagPickerDialog() {
+  return screen.getByRole("dialog", { name: "Choose flag color" });
+}
+
+describe("FlagCell", () => {
+  it("sets, changes, and clears a flag by named controls", () => {
+    const onChange = vi.fn();
+    const { rerender } = render(<FlagCell color={null} onChange={onChange} />);
+
+    fireEvent.click(screen.getByRole("button", { name: "Add flag" }));
+    fireEvent.click(within(flagPickerDialog()).getByRole("button", { name: "Red" }));
+    expect(onChange).toHaveBeenCalledWith("#EF4444");
+    expect(screen.queryByRole("dialog", { name: "Choose flag color" })).toBeNull();
+
+    rerender(<FlagCell color="#EF4444" onChange={onChange} />);
+    expect(screen.getByRole("button", { name: "Red flag" })).toBeInTheDocument();
+
+    fireEvent.click(screen.getByRole("button", { name: "Red flag" }));
+    fireEvent.click(within(flagPickerDialog()).getByRole("button", { name: "Blue" }));
+    expect(onChange).toHaveBeenCalledWith("#3B82F6");
+
+    rerender(<FlagCell color="#3B82F6" onChange={onChange} />);
+    fireEvent.click(screen.getByRole("button", { name: "Blue flag" }));
+    fireEvent.click(within(flagPickerDialog()).getByRole("button", { name: "Clear flag" }));
+    expect(onChange).toHaveBeenCalledWith(null);
+    expect(screen.queryByRole("dialog", { name: "Choose flag color" })).toBeNull();
+  });
+
+  it("exposes a non-color name when the hex is not in the palette", () => {
+    render(<FlagCell color="#000000" onChange={vi.fn()} />);
+    expect(screen.getByRole("button", { name: "Flagged" })).toBeInTheDocument();
+  });
+
+  it("names a disabled flag without exposing a button", () => {
+    const onChange = vi.fn();
+    render(<FlagCell color="#EF4444" disabled onChange={onChange} />);
+
+    expect(screen.getByRole("img", { name: "Red flag" })).toBeInTheDocument();
+    expect(screen.queryByRole("button", { name: "Red flag" })).toBeNull();
+    expect(onChange).not.toHaveBeenCalled();
+  });
+});
+
+describe("WoTableHead flag column", () => {
+  it("exposes a screen-reader label for the flag column", () => {
+    render(
+      <table>
+        <WoTableHead />
+      </table>,
+    );
+
+    expect(screen.getByRole("columnheader", { name: "Flag" })).toBeInTheDocument();
+  });
+});
diff --git a/src/test/app/(protected)/workorders/slide-over-info-tab-edit-view-additional-contacts.test.tsx b/src/test/app/(protected)/workorders/slide-over-info-tab-edit-view-additional-contacts.test.tsx
index b1627674..9ebf754e 100644
--- a/src/test/app/(protected)/workorders/slide-over-info-tab-edit-view-additional-contacts.test.tsx
+++ b/src/test/app/(protected)/workorders/slide-over-info-tab-edit-view-additional-contacts.test.tsx
@@ -138,6 +138,7 @@ describe("SlideOverInfoTabEditView additional contacts", () => {
       { withAuth: false },
     );
 
+    expect(screen.getByText("Appt Time (optional)")).toBeInTheDocument();
     expect(screen.getByRole("button", { name: /save site 1/i })).toBeInTheDocument();
     fireEvent.click(screen.getByRole("button", { name: /save site 1/i }));
 
diff --git a/src/test/app/(protected)/workorders/wizard-step-vendor-time-closability.test.tsx b/src/test/app/(protected)/workorders/wizard-step-vendor-time-closability.test.tsx
index 12ad3346..e2d04458 100644
--- a/src/test/app/(protected)/workorders/wizard-step-vendor-time-closability.test.tsx
+++ b/src/test/app/(protected)/workorders/wizard-step-vendor-time-closability.test.tsx
@@ -3,6 +3,22 @@ import { describe, expect, it, vi } from "vitest";
 import { WizardStepVendorTime } from "@/app/(protected)/workorders/_components/wizard/wizard-step-vendor-time";
 import { EMPTY_WIZARD_DRAFT } from "@/domain/work-orders/types/work-order-wizard";
 
+describe("WizardStepVendorTime Appt Time", () => {
+  it("marks Appt Time as optional", () => {
+    render(
+      <WizardStepVendorTime
+        draft={{ ...EMPTY_WIZARD_DRAFT, type: "PM", status: "Incomplete" }}
+        vendors={[]}
+        onUpdate={vi.fn()}
+        onPatch={vi.fn()}
+      />,
+    );
+
+    expect(screen.getByText("Appt Time")).toBeInTheDocument();
+    expect(screen.getAllByText("optional").length).toBeGreaterThan(0);
+  });
+});
+
 describe("WizardStepVendorTime closability gate", () => {
   it("disables Completed when closability requirements are missing", () => {
     const onUpdate = vi.fn();
diff --git a/src/test/app/(protected)/workorders/wo-table-row-completed-lock.test.tsx b/src/test/app/(protected)/workorders/wo-table-row-completed-lock.test.tsx
index c49d8001..2c02e58c 100644
--- a/src/test/app/(protected)/workorders/wo-table-row-completed-lock.test.tsx
+++ b/src/test/app/(protected)/workorders/wo-table-row-completed-lock.test.tsx
@@ -98,8 +98,8 @@ describe("WoTableRow completed selective lock", () => {
       { withAuth: false },
     );
 
-    expect(screen.getByTitle("Add color flag")).toBeEnabled();
-    fireEvent.click(screen.getByTitle("Add color flag"));
+    expect(screen.getByRole("button", { name: "Add flag" })).toBeEnabled();
+    fireEvent.click(screen.getByRole("button", { name: "Add flag" }));
     expect(screen.getByText("Clear flag")).toBeInTheDocument();
     expect(screen.queryByTitle("Edit")).not.toBeInTheDocument();
     expect(screen.getByTitle("View details")).toBeInTheDocument();
diff --git a/src/test/domain/work-orders/flag-colors.test.ts b/src/test/domain/work-orders/flag-colors.test.ts
new file mode 100644
index 00000000..15ba9909
--- /dev/null
+++ b/src/test/domain/work-orders/flag-colors.test.ts
@@ -0,0 +1,23 @@
+import { describe, expect, it } from "vitest";
+import { flagColorName, flagTriggerAccessibleName } from "@/domain/work-orders/flag-colors";
+
+describe("flag color accessible names", () => {
+  it("resolves palette hex values to names", () => {
+    expect(flagColorName("#EF4444")).toBe("Red");
+    expect(flagColorName("#ef4444")).toBe("Red");
+    expect(flagColorName("#3B82F6")).toBe("Blue");
+  });
+
+  it("returns null for empty or unknown values", () => {
+    expect(flagColorName(null)).toBeNull();
+    expect(flagColorName(undefined)).toBeNull();
+    expect(flagColorName("")).toBeNull();
+    expect(flagColorName("#000000")).toBeNull();
+  });
+
+  it("builds trigger names that are not color-only", () => {
+    expect(flagTriggerAccessibleName(null)).toBe("Add flag");
+    expect(flagTriggerAccessibleName("#EF4444")).toBe("Red flag");
+    expect(flagTriggerAccessibleName("#000000")).toBe("Flagged");
+  });
+});
diff --git a/src/test/domain/work-orders/mappers/wizard-draft-mapper.test.ts b/src/test/domain/work-orders/mappers/wizard-draft-mapper.test.ts
index b1124749..a086e5f5 100644
--- a/src/test/domain/work-orders/mappers/wizard-draft-mapper.test.ts
+++ b/src/test/domain/work-orders/mappers/wizard-draft-mapper.test.ts
@@ -194,6 +194,22 @@ describe("wizard step validation", () => {
     expect(isWizardStepValid(2, draft)).toBe(true);
   });
 
+  it("does not require Appt Time for wizard step 3 or create", () => {
+    const draft = {
+      ...EMPTY_WIZARD_DRAFT,
+      type: "PM" as const,
+      woNumber: "12345678901",
+      locationId: "99",
+      siteCode: "BK5",
+      pocName: "Jordan",
+      pocPhone: "555-0100",
+      apptStart: "",
+      apptEnd: "",
+    };
+    expect(isWizardStepValid(3, draft)).toBe(true);
+    expect(canCreateWorkOrderFromWizard(draft)).toBe(true);
+  });
+
   it("allows provisional SH-prefixed woNumber", () => {
     const draft = {
       ...EMPTY_WIZARD_DRAFT,
diff --git a/src/test/domain/work-orders/mappers/work-order-board-mapper.test.ts b/src/test/domain/work-orders/mappers/work-order-board-mapper.test.ts
index 0f003070..26991511 100644
--- a/src/test/domain/work-orders/mappers/work-order-board-mapper.test.ts
+++ b/src/test/domain/work-orders/mappers/work-order-board-mapper.test.ts
@@ -299,6 +299,22 @@ describe("mapWizardDraftToBoardCreatePayload", () => {
     expect(payload.scheduledDate).toBeUndefined();
   });
 
+  it("omits apptTime when start and end are empty even with a vendor", () => {
+    const payload = mapWizardDraftToBoardCreatePayload({
+      ...EMPTY_WIZARD_DRAFT,
+      type: "PM",
+      siteCode: "BK5",
+      vendorId: "5",
+      scheduledOn: "2026-06-25",
+      apptStart: "",
+      apptEnd: "",
+    });
+
+    expect(payload.vendorId).toBe(5);
+    expect(payload.apptDate).toBe("2026-06-25");
+    expect(payload.apptTime).toBeUndefined();
+  });
+
   it("omits appointment fields when vendor is missing but still sends techPhone and vendorNotes", () => {
     const payload = mapWizardDraftToBoardCreatePayload({
       ...EMPTY_WIZARD_DRAFT,
diff --git a/src/test/domain/work-orders/mappers/work-order-board-patch-mapper.test.ts b/src/test/domain/work-orders/mappers/work-order-board-patch-mapper.test.ts
index 9975fc43..0cb2c792 100644
--- a/src/test/domain/work-orders/mappers/work-order-board-patch-mapper.test.ts
+++ b/src/test/domain/work-orders/mappers/work-order-board-patch-mapper.test.ts
@@ -70,6 +70,9 @@ describe("expandTablePatchToBoardFieldOps", () => {
     expect(expandTablePatchToBoardFieldOps({ severity: null })).toEqual([
       { field: "severity", value: "" },
     ]);
+    expect(expandTablePatchToBoardFieldOps({ apptTime: "" })).toEqual([
+      { field: "apptTime", value: "" },
+    ]);
   });
 
   it("emits service notes modal ops in pm → extraServices → serviceNotes order", () => {
diff --git a/src/test/domain/work-orders/use-cases/use-work-order-table-mutations.test.tsx b/src/test/domain/work-orders/use-cases/use-work-order-table-mutations.test.tsx
index e34a7cfd..4d1c374c 100644
--- a/src/test/domain/work-orders/use-cases/use-work-order-table-mutations.test.tsx
+++ b/src/test/domain/work-orders/use-cases/use-work-order-table-mutations.test.tsx
@@ -582,3 +582,63 @@ describe("useWorkOrderTableMutations patchField success callbacks", () => {
     await waitFor(() => expect(onSuccessFirst).toHaveBeenCalledTimes(1));
   });
 });
+
+describe("useWorkOrderTableMutations apptTime clear", () => {
+  it("patches empty apptTime and keeps the appointment date on refetch", async () => {
+    const datedRow: WorkOrderTableRow = {
+      ...BASE_ROW,
+      scheduledOn: "2026-06-25",
+      apptStart: "09:00",
+      apptEnd: "11:00",
+      apptTime: "09:00 – 11:00",
+      vendorId: "7",
+      primaryDispatchId: 10,
+      dispatchRowVersion: "disp-v1",
+    };
+    const clearedRow: WorkOrderTableRow = {
+      ...datedRow,
+      apptStart: "",
+      apptEnd: "",
+      apptTime: "",
+      rowVersion: "wo-v2",
+    };
+    patchBoardField.mockReset();
+    patchBoardField.mockResolvedValue(clearedRow);
+
+    const onPatch = vi.fn();
+    const { result } = renderHook(
+      () =>
+        useWorkOrderTableMutations({
+          onPatch,
+          clearPatch: () => undefined,
+          getRow: () => datedRow,
+        }),
+      { wrapper: makeWrapper() },
+    );
+
+    act(() => {
+      result.current.patchField(42, { apptTime: "" });
+    });
+
+    await waitFor(() =>
+      expect(onPatch).toHaveBeenCalledWith(
+        42,
+        expect.objectContaining({
+          apptTime: "",
+          scheduledOn: "2026-06-25",
+        }),
+      ),
+    );
+
+    expect(patchBoardField).toHaveBeenCalledWith(
+      42,
+      expect.objectContaining({
+        field: "apptTime",
+        value: "",
+        workOrderVersion: "AAAAAAA=",
+        dispatchVersion: "disp-v1",
+        primaryDispatchId: 10,
+      }),
+    );
+  });
+});
diff --git a/src/test/domain/work-orders/utils/get-inline-create-missing.test.ts b/src/test/domain/work-orders/utils/get-inline-create-missing.test.ts
index 3ddd8dca..c5336aa1 100644
--- a/src/test/domain/work-orders/utils/get-inline-create-missing.test.ts
+++ b/src/test/domain/work-orders/utils/get-inline-create-missing.test.ts
@@ -2,11 +2,25 @@ import { describe, expect, it } from "vitest";
 import {
   draftHasScheduleDate,
   getInlineCreateMissing,
+  INLINE_CREATE_REQ_LABELS,
   inlineCreateSaveHint,
   inlineCreateSiteError,
 } from "@/domain/work-orders/utils/get-inline-create-missing";
 
 describe("getInlineCreateMissing", () => {
+  it("does not require Appt Time for inline create", () => {
+    expect(
+      getInlineCreateMissing({
+        site: "BK5",
+        locationId: "12",
+        woNumber: "25001",
+        pocName: "Jane",
+        pocPhone: "555-0100",
+      }),
+    ).toEqual([]);
+    expect(Object.keys(INLINE_CREATE_REQ_LABELS)).not.toContain("apptTime");
+  });
+
   it("returns empty when Site, WO#, and POC are filled even without schedule", () => {
     expect(
       getInlineCreateMissing({
diff --git a/src/test/domain/work-orders/utils/wizard-date-utils.test.ts b/src/test/domain/work-orders/utils/wizard-date-utils.test.ts
index 8f63bbbf..acf1ce97 100644
--- a/src/test/domain/work-orders/utils/wizard-date-utils.test.ts
+++ b/src/test/domain/work-orders/utils/wizard-date-utils.test.ts
@@ -3,10 +3,21 @@ import {
   fmtDateRange,
   fmtShortDate,
   pad2,
+  parseApptTime,
   rangeDayCount,
   todayIso,
 } from "@/domain/work-orders/utils/wizard-date-utils";
 
+describe("parseApptTime", () => {
+  it("parses a 24-hour start-only value", () => {
+    expect(parseApptTime("09:00")).toEqual({ start: "09:00", end: "" });
+  });
+
+  it("leaves free-text labels unparsed", () => {
+    expect(parseApptTime("AM before 2pm")).toEqual({ start: "", end: "" });
+  });
+});
+
 describe("fmtShortDate", () => {
   it("formats ISO dates as Mon D", () => {
     expect(fmtShortDate("2026-06-08")).toBe("Jun 8");
diff --git a/src/test/domain/work-orders/utils/wo-closability.test.ts b/src/test/domain/work-orders/utils/wo-closability.test.ts
index 9d97358d..674d5d4a 100644
--- a/src/test/domain/work-orders/utils/wo-closability.test.ts
+++ b/src/test/domain/work-orders/utils/wo-closability.test.ts
@@ -77,6 +77,12 @@ describe("getClosabilityGaps", () => {
     expect(getClosabilityGaps(makeInput())).toEqual([]);
   });
 
+  it("does not require appointment time to complete", () => {
+    const gaps = getClosabilityGaps(makeInput());
+    expect(gaps).toEqual([]);
+    expect(gaps.join(" ")).not.toMatch(/appt/i);
+  });
+
   it("allows company without technician", () => {
     const gaps = getClosabilityGaps(makeInput({ tech: "" }));
     expect(gaps).toEqual([]);