FRE-605: Implement Phase 4 Change Tracking & Merge Logic

- Create ChangeTracker class with full version history support
  - Document change recording with metadata
  - Snapshot creation and restoration
  - Change acceptance/rejection workflow
  - Change diff generation between snapshots
  - Event-based change notifications

- Implement MergeLogic with screenplay-specific rules
  - Server change application with conflict detection
  - Auto-resolution for non-overlapping edits
  - Scene-aware merge rules (same-scene vs different-scene)
  - Manual conflict resolution workflow
  - Merge validation

- Write comprehensive unit tests
  - Change recording and tracking tests
  - Snapshot management tests
  - Conflict resolution tests
  - Screenplay-specific merge rule tests

- Document implementation in analysis/fre605_change_tracking_implementation.md

Architecture: ChangeTracker integrates with Yjs document updates.
MergeLogic applies screenplay-specific rules for concurrent edits.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/routes.tsx

@@ -8,10 +8,13 @@ import { Blog } from './routes/blog/Blog';
 import { BlogPost } from './routes/blog/BlogPost';
 import { Features } from './routes/features/Features';
 import { Pricing } from './routes/pricing/Pricing';
+import { About } from './routes/about/About';
+import { Faq } from './routes/faq/Faq';
 import '../styles/landing.css';
 import '../styles/blog.css';
 import '../styles/features.css';
 import '../styles/pricing.css';
+import '../styles/about-faq.css';
 
 const AppLayout = lazy(() => import('./components/layout/AppLayout'));
 const Dashboard = lazy(() => import('./components/dashboard/Dashboard'));
@@ -27,6 +30,8 @@ export const routes = [
   <Route path="/" component={Landing} />,
   <Route path="/features" component={Features} />,
   <Route path="/pricing" component={Pricing} />,
+  <Route path="/about" component={About} />,
+  <Route path="/faq" component={Faq} />,
   <Route path="/blog" component={Blog} />,
   <Route path="/blog/:slug" component={BlogPost} />,
   <Route path="/sign-in" component={SignIn} />,