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/views/project/ProjectOverviewView.vue

@@ -105,29 +105,22 @@
     </div>
 
     <!-- Recent Activity -->
-    <Card class="mt-6">
-      <CardHeader>
-        <CardTitle>Recent Activity</CardTitle>
-      </CardHeader>
-      <CardContent>
-        <div class="text-center py-8 text-muted-foreground">
-          <Activity class="h-8 w-8 mx-auto mb-2" />
-          <p>Activity feed coming soon</p>
-        </div>
-      </CardContent>
-    </Card>
+    <div class="mt-6" v-if="project">
+      <ActivityFeed :project-id="project.id" title="Recent Activity" />
+    </div>
   </div>
 </template>
 
 <script setup lang="ts">
 import { computed } from 'vue'
 import { useRoute } from 'vue-router'
-import { Camera, Package, Users, Activity } from 'lucide-vue-next'
+import { Camera, Package, Users } from 'lucide-vue-next'
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
 import { Badge } from '@/components/ui/badge'
 import { Label } from '@/components/ui/label'
 import { useProjectsStore } from '@/stores/projects'
 import TechnicalSpecsSummary from '@/components/project/TechnicalSpecsSummary.vue'
+import ActivityFeed from '@/components/activity/ActivityFeed.vue'
 
 const route = useRoute()
 const projectsStore = useProjectsStore()