Truth-in-UI cleanup: wire real dashboard data, fix delete/dialog gaps

Phase 1 of frontend_tasks.md - stop showing fabricated/broken UI:

- Dashboard now fetches real stats (projects, tasks, users, pending
  approvals, API keys, developer stats, pending reviews, admin
  activity) instead of hardcoded numbers. Added services/developer.ts
  and services/review.ts wrappers for previously-unused backend
  endpoints.
- Wired ActivityFeed into every project's Overview page in place of
  the "coming soon" placeholder.
- Registered the missing /projects/:id/technical-specs route (view
  and service already existed, just unreachable).
- Fixed AssetDeleteConfirmDialog's raw styled divs to use the shared
  Alert component and wired it into AssetBrowser, matching
  ShotBrowser's impact-summary + type-to-confirm safety pattern
  (asset deletion was previously less safe than shot deletion).
- Fixed a shared bug in both delete dialogs where the impact-summary
  section never rendered (watch on the open prop needed
  { immediate: true }).
- Replaced native confirm()/alert() with styled AlertDialog/Dialog in
  NoteItem, TaskAttachments, and UserMenu's keyboard-shortcuts item.
- Removed dead-end UI: Google OAuth stub buttons, UserMenu items
  pointing at non-existent routes, the /developer/docs dead link, and
  the no-op action button on the API Keys placeholder page.
- Removed leftover debug console logging across 8 files.

Added frontend_report.md (full audit) and frontend_tasks.md (phased
checklist) as the reference for this and future phases.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/src/components/task/TaskAttachments.vue

@@ -104,6 +104,23 @@
         </div>
       </DialogContent>
     </Dialog>
+
+    <AlertDialog :open="showDeleteDialog" @update:open="showDeleteDialog = $event">
+      <AlertDialogContent>
+        <AlertDialogHeader>
+          <AlertDialogTitle>Delete Attachment</AlertDialogTitle>
+          <AlertDialogDescription>
+            Are you sure you want to delete this attachment? This action cannot be undone.
+          </AlertDialogDescription>
+        </AlertDialogHeader>
+        <AlertDialogFooter>
+          <AlertDialogCancel>Cancel</AlertDialogCancel>
+          <AlertDialogAction @click="confirmDeleteAttachment" class="bg-destructive text-destructive-foreground hover:bg-destructive/90">
+            Delete
+          </AlertDialogAction>
+        </AlertDialogFooter>
+      </AlertDialogContent>
+    </AlertDialog>
   </div>
 </template>
 
@@ -125,6 +142,16 @@ import {
   DialogTitle,
   DialogDescription,
 } from '@/components/ui/dialog'
+import {
+  AlertDialog,
+  AlertDialogAction,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogTitle,
+} from '@/components/ui/alert-dialog'
 import AttachmentCard from './AttachmentCard.vue'
 import { taskService, type TaskAttachment } from '@/services/task'
 import { useToast } from '@/components/ui/toast/use-toast'
@@ -148,6 +175,8 @@ const filterType = ref('all')
 const viewerOpen = ref(false)
 const selectedAttachment = ref<TaskAttachment | null>(null)
 const mediaBlobUrl = ref<string | null>(null)
+const showDeleteDialog = ref(false)
+const attachmentToDelete = ref<number | null>(null)
 
 const attachmentTypes = [
   { value: 'all', label: 'All' },
@@ -197,23 +226,30 @@ async function handleFileSelect(event: Event) {
   }
 }
 
-async function handleDelete(attachmentId: number) {
-  if (!confirm('Are you sure you want to delete this attachment?')) return
+function handleDelete(attachmentId: number) {
+  attachmentToDelete.value = attachmentId
+  showDeleteDialog.value = true
+}
+
+async function confirmDeleteAttachment() {
+  if (attachmentToDelete.value === null) return
 
   try {
-    await taskService.deleteTaskAttachment(props.taskId, attachmentId)
+    await taskService.deleteTaskAttachment(props.taskId, attachmentToDelete.value)
     emit('attachmentsUpdated')
     toast({
       title: 'Success',
       description: 'Attachment deleted successfully'
     })
   } catch (error: any) {
-    console.error('Error deleting attachment:', error)
     toast({
       title: 'Error',
       description: error.response?.data?.detail || 'Failed to delete attachment',
       variant: 'destructive'
     })
+  } finally {
+    showDeleteDialog.value = false
+    attachmentToDelete.value = null
   }
 }