feat: analytics dashboards & two-tier feedback system (#78)

* docs: add analytics & user feedback design document

Covers team analytics, personal analytics, flow analytics,
step-level thumbs up/down feedback, and flow CSAT ratings.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* docs: add analytics & feedback implementation plan

12-task TDD plan covering session ratings, step feedback,
team/personal/flow analytics endpoints, and frontend pages.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: add session_ratings table and analytics indexes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: add SessionRating model and analytics schemas

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: add session CSAT rating endpoint with tests

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: add step thumbs feedback and /ratings alias routes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: add team, personal, and flow analytics endpoints

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: add recharts, analytics types, and API client

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: add inline step thumbs up/down feedback during sessions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: add CSAT rating modal after session completion

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: add Team Analytics page with charts and leaderboards

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: add Flow Analytics panel with step dropoff and CSAT data

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: add My Analytics page with personal stats and charts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/router.tsx

@@ -27,6 +27,8 @@ const ProceduralNavigationPage = lazy(() => import('@/pages/ProceduralNavigation
 const SessionHistoryPage = lazy(() => import('@/pages/SessionHistoryPage'))
 const SessionDetailPage = lazy(() => import('@/pages/SessionDetailPage'))
 const MySharesPage = lazy(() => import('@/pages/MySharesPage'))
+const TeamAnalyticsPage = lazy(() => import('@/pages/TeamAnalyticsPage'))
+const MyAnalyticsPage = lazy(() => import('@/pages/MyAnalyticsPage'))
 const AccountSettingsPage = lazy(() => import('@/pages/AccountSettingsPage'))
 // Admin pages
 const AdminLayout = lazy(() => import('@/components/admin/AdminLayout'))
@@ -198,6 +200,22 @@ export const router = createBrowserRouter([
           </Suspense>
         ),
       },
+      {
+        path: 'analytics',
+        element: (
+          <Suspense fallback={<PageLoader />}>
+            <TeamAnalyticsPage />
+          </Suspense>
+        ),
+      },
+      {
+        path: 'analytics/me',
+        element: (
+          <Suspense fallback={<PageLoader />}>
+            <MyAnalyticsPage />
+          </Suspense>
+        ),
+      },
       // Admin routes
       {
         path: 'admin',