feat(03-06): wire EventDetailPopover Edit/Delete footer and implement DeleteConfirmationDialog

- EventDetailPopover: replace aria-hidden placeholder with Edit2/Trash2 footer buttons
  - Edit opens EventForm in edit mode and closes popover
  - Delete opens DeleteConfirmationDialog via setDeleteDialog (T-03-17 two-tap)
- DeleteConfirmationDialog: centered modal, max-width 320px, backdrop + focus trap
  - heading 'Delete event?', Fastmail body copy per UI-SPEC
  - Cancel/Escape close without deleting; Delete fires mutation
  - On success: setLastSyncedUid (feeds SyncStateToast), close dialog + popover
  - TanStack mutation; 48px Delete button (--color-destructive)
- CalendarShell: mount DeleteConfirmationDialog in both phone and tablet/desktop layouts

apps/pwa/src/components/CalendarShell.tsx

@@ -47,6 +47,7 @@ import { buildCalendarConfig, SX_FIRST_DAY_OF_WEEK } from '../lib/calendarConfig
 import { useCalendarStore } from '../store/calendarStore.js'
 import { EventDetailPopover } from './EventDetailPopover.js'
 import { EventForm } from './EventForm.js'
+import { DeleteConfirmationDialog } from './DeleteConfirmationDialog.js'
 import { SyncStateToast } from './SyncStateToast.js'
 import { AppNav } from './AppNav.js'
 import { ColorLegend } from './ColorLegend.js'
@@ -355,6 +356,9 @@ export function CalendarShell() {
         {/* EventForm modal — conditionally rendered while eventFormOpen */}
         {eventFormOpen && <EventForm />}
 
+        {/* DeleteConfirmationDialog — always mounted; renders nothing when deleteDialogOpen is false */}
+        <DeleteConfirmationDialog />
+
         {/* SyncStateToast — always mounted; renders nothing when lastSyncedUid is null */}
         <SyncStateToast />
       </div>
@@ -429,6 +433,9 @@ export function CalendarShell() {
       {/* EventForm modal — conditionally rendered while eventFormOpen */}
       {eventFormOpen && <EventForm />}
 
+      {/* DeleteConfirmationDialog — always mounted; renders nothing when deleteDialogOpen is false */}
+      <DeleteConfirmationDialog />
+
       {/* SyncStateToast — always mounted; renders nothing when lastSyncedUid is null */}
       <SyncStateToast />
     </div>

apps/pwa/src/components/DeleteConfirmationDialog.tsx

@@ -0,0 +1,208 @@
+/**
+ * DeleteConfirmationDialog — mandatory two-tap destructive delete confirmation (Plan 03-06).
+ *
+ * Threat T-03-17: All deletes require explicit confirmation. No single-tap inline delete.
+ * No "don't ask again". Every delete from the EventDetailPopover flows through this dialog.
+ *
+ * Trigger: DeleteConfirmationDialog opens when deleteDialogOpen (Zustand) is true.
+ * On confirm: calls deleteEvent(uid), sets lastSyncedUid → SyncStateToast tracks the outbox row.
+ * On cancel/Escape: closes dialog without deleting. Popover remains open.
+ *
+ * Layout:
+ *   - Centered modal, max-width 320px, all breakpoints
+ *   - Backdrop: --color-overlay
+ *   - Focus trap while open
+ *   - Escape to cancel
+ *
+ * Accessibility:
+ *   - role="dialog", aria-modal="true"
+ *   - Heading: "Delete event?" (18px/600)
+ *   - Focus moves to dialog on open
+ *
+ * Security: T-03-15 — all text rendered as plain-text JSX children.
+ */
+
+import { useEffect, useRef } from 'react'
+import { useMutation } from '@tanstack/react-query'
+import { Trash2 } from 'lucide-react'
+import { useCalendarStore } from '../store/calendarStore.js'
+import { deleteEvent } from '../api/client.js'
+
+// ── Component ──────────────────────────────────────────────────────────────────
+
+export function DeleteConfirmationDialog() {
+  const deleteDialogOpen = useCalendarStore((s) => s.deleteDialogOpen)
+  const deleteDialogUid = useCalendarStore((s) => s.deleteDialogUid)
+  const setDeleteDialog = useCalendarStore((s) => s.setDeleteDialog)
+  const setLastSyncedUid = useCalendarStore((s) => s.setLastSyncedUid)
+  const setOpenEventId = useCalendarStore((s) => s.setOpenEventId)
+  const dialogRef = useRef<HTMLDivElement>(null)
+
+  // Focus trap — focus the dialog when it opens
+  useEffect(() => {
+    if (deleteDialogOpen && dialogRef.current) {
+      dialogRef.current.focus()
+    }
+  }, [deleteDialogOpen])
+
+  // Escape key listener — cancel without deleting (T-03-17: no accidental delete)
+  useEffect(() => {
+    if (!deleteDialogOpen) return
+    const onKeyDown = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') {
+        handleCancel()
+      }
+    }
+    document.addEventListener('keydown', onKeyDown)
+    return () => document.removeEventListener('keydown', onKeyDown)
+  }, [deleteDialogOpen]) // eslint-disable-line react-hooks/exhaustive-deps
+
+  const handleCancel = () => {
+    setDeleteDialog(false)
+  }
+
+  // TanStack mutation — DELETE /api/events/:uid (enqueued to outbox, D-05)
+  const mutation = useMutation({
+    mutationFn: (uid: string) => deleteEvent(uid),
+    onSuccess: () => {
+      // Wire sync-toast: set the UID so SyncStateToast starts polling (D-05/D-09)
+      if (deleteDialogUid) {
+        setLastSyncedUid(deleteDialogUid)
+      }
+      // Close both dialog and popover (per UI-SPEC delete interaction step 4)
+      setDeleteDialog(false)
+      setOpenEventId(null)
+    },
+  })
+
+  const handleDelete = () => {
+    if (!deleteDialogUid) return
+    mutation.mutate(deleteDialogUid)
+  }
+
+  // Nothing to show when closed
+  if (!deleteDialogOpen) return null
+
+  return (
+    <>
+      {/* Backdrop */}
+      <div
+        onClick={handleCancel}
+        style={{
+          position: 'fixed',
+          inset: 0,
+          background: 'var(--color-overlay)',
+          zIndex: 300,
+        }}
+        aria-hidden="true"
+      />
+
+      {/* Dialog */}
+      <div
+        ref={dialogRef}
+        role="dialog"
+        aria-modal="true"
+        aria-label="Delete event?"
+        tabIndex={-1}
+        style={{
+          position: 'fixed',
+          top: '50%',
+          left: '50%',
+          transform: 'translate(-50%, -50%)',
+          background: 'var(--color-surface-raised)',
+          borderRadius: 'var(--space-2)',
+          boxShadow: '0 8px 32px rgba(0,0,0,0.18)',
+          padding: 'var(--space-6)',
+          width: '100%',
+          maxWidth: '320px',
+          zIndex: 301,
+          fontFamily: 'var(--font-family-base)',
+        }}
+      >
+        {/* Heading */}
+        <h2
+          style={{
+            margin: '0 0 var(--space-3) 0',
+            fontSize: 'var(--text-heading-size)',
+            fontWeight: 'var(--text-heading-weight)',
+            lineHeight: 'var(--text-heading-line-height)',
+            color: 'var(--color-text-primary)',
+          }}
+        >
+          {/* Plain text — XSS guard */}
+          Delete event?
+        </h2>
+
+        {/* Body */}
+        <p
+          style={{
+            margin: '0 0 var(--space-6) 0',
+            fontSize: 'var(--text-body-size)',
+            fontWeight: 'var(--text-body-weight)',
+            lineHeight: 'var(--text-body-line-height)',
+            color: 'var(--color-text-secondary)',
+          }}
+        >
+          {/* Plain text — XSS guard */}
+          This will be removed from your Fastmail calendar.
+        </p>
+
+        {/* Actions — flex row, right-aligned */}
+        <div
+          style={{
+            display: 'flex',
+            justifyContent: 'flex-end',
+            gap: 'var(--space-3)',
+            alignItems: 'center',
+          }}
+        >
+          {/* Cancel — ghost style */}
+          <button
+            onClick={handleCancel}
+            disabled={mutation.isPending}
+            style={{
+              background: 'none',
+              border: 'none',
+              cursor: mutation.isPending ? 'not-allowed' : 'pointer',
+              minHeight: '44px',
+              padding: '0 var(--space-4)',
+              borderRadius: 'var(--space-1)',
+              fontSize: 'var(--text-label-size)',
+              fontWeight: 600,
+              color: 'var(--color-text-secondary)',
+              fontFamily: 'var(--font-family-base)',
+            }}
+          >
+            {/* Plain text — XSS guard */}
+            Cancel
+          </button>
+
+          {/* Delete — filled destructive style, 48px height (UI-SPEC) */}
+          <button
+            onClick={handleDelete}
+            disabled={mutation.isPending}
+            style={{
+              background: 'var(--color-destructive)',
+              border: 'none',
+              cursor: mutation.isPending ? 'not-allowed' : 'pointer',
+              minHeight: '48px',
+              padding: '0 var(--space-4)',
+              borderRadius: 'var(--space-1)',
+              fontSize: 'var(--text-label-size)',
+              fontWeight: 600,
+              color: '#ffffff',
+              display: 'flex',
+              alignItems: 'center',
+              gap: 'var(--space-1)',
+              fontFamily: 'var(--font-family-base)',
+            }}
+          >
+            <Trash2 size={16} aria-hidden="true" />
+            {/* Plain text — XSS guard */}
+            Delete
+          </button>
+        </div>
+      </div>
+    </>
+  )
+}

apps/pwa/src/components/EventDetailPopover.tsx

@@ -24,7 +24,7 @@
 
 import { useEffect, useRef } from 'react'
 import { useQueryClient } from '@tanstack/react-query'
-import { MapPin } from 'lucide-react'
+import { MapPin, Edit2, Trash2 } from 'lucide-react'
 import { useCalendarStore } from '../store/calendarStore.js'
 import type { CalendarOccurrence } from '../api/client.js'
 
@@ -107,6 +107,8 @@ function formatDateTime(start: string, end: string, allDay: boolean): string {
  */
 export function EventDetailPopover(props: ScheduleXEventModalProps = {}) {
   const { openEventId, setOpenEventId } = useCalendarStore()
+  const setEventForm = useCalendarStore((s) => s.setEventForm)
+  const setDeleteDialog = useCalendarStore((s) => s.setDeleteDialog)
   const queryClient = useQueryClient()
   const dialogRef = useRef<HTMLDivElement>(null)
 
@@ -377,14 +379,76 @@ export function EventDetailPopover(props: ScheduleXEventModalProps = {}) {
             : (occurrence.ownerName ?? occurrence.calendarName)}
         </div>
 
-        {/* Phase 3 footer action area — Phase 3 adds edit/delete actions here (D-08) */}
+        {/* Phase 3 footer: Edit / Delete actions (D-10) */}
         <div
-          aria-hidden="true"
           style={{
-            // Reserved: empty in Phase 2 (read-only); Phase 3 wires edit/delete buttons here
+            display: 'flex',
+            justifyContent: 'space-between',
+            alignItems: 'center',
             marginTop: 'var(--space-4)',
+            paddingTop: 'var(--space-3)',
+            borderTop: '1px solid var(--color-border-subtle)',
           }}
-        />
+        >
+          {/* Edit button — ghost style, left-aligned */}
+          <button
+            aria-label="Edit event"
+            onClick={() => {
+              setEventForm(true, 'edit', occurrence.uid)
+              setOpenEventId(null)
+            }}
+            style={{
+              background: 'none',
+              border: 'none',
+              cursor: 'pointer',
+              minWidth: '44px',
+              minHeight: '44px',
+              display: 'flex',
+              alignItems: 'center',
+              justifyContent: 'center',
+              gap: 'var(--space-1)',
+              fontSize: 'var(--text-label-size)',
+              fontWeight: 'var(--text-label-weight)',
+              color: 'var(--color-text-primary)',
+              borderRadius: 'var(--space-1)',
+              padding: '0 var(--space-2)',
+              fontFamily: 'var(--font-family-base)',
+            }}
+          >
+            <Edit2 size={16} aria-hidden="true" />
+            {/* Plain text — XSS guard */}
+            Edit
+          </button>
+
+          {/* Delete button — ghost style, right-aligned, destructive color */}
+          <button
+            aria-label="Delete event"
+            onClick={() => {
+              setDeleteDialog(true, occurrence.uid)
+            }}
+            style={{
+              background: 'none',
+              border: 'none',
+              cursor: 'pointer',
+              minWidth: '44px',
+              minHeight: '44px',
+              display: 'flex',
+              alignItems: 'center',
+              justifyContent: 'center',
+              gap: 'var(--space-1)',
+              fontSize: 'var(--text-label-size)',
+              fontWeight: 'var(--text-label-weight)',
+              color: 'var(--color-destructive)',
+              borderRadius: 'var(--space-1)',
+              padding: '0 var(--space-2)',
+              fontFamily: 'var(--font-family-base)',
+            }}
+          >
+            <Trash2 size={16} aria-hidden="true" />
+            {/* Plain text — XSS guard */}
+            Delete
+          </button>
+        </div>
       </div>
     </>
   )