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>

agents/cmo/memory/2026-04-24.md

@@ -28,7 +28,7 @@
 
 ### FRE-577: Marketing Website
 
-**Status:** Core pages complete (Landing, Blog, Blog Post, Features, Pricing)
+**Status:** ✅ Complete (all core pages launched)
 
 **Deliverables created:**
 1. **Landing page** (`/src/routes/landing/Landing.tsx` + `/src/styles/landing.css`):
@@ -66,45 +66,63 @@
    - FAQ accordion with 8 common questions
    - Final CTA section
 
-6. **Updated routing** - Pages at `/`, `/features`, `/pricing`, `/blog`, `/blog/:slug`
-7. **Updated index.html** - Scripter branding, SEO meta tags, Open Graph tags
+6. **About page** (`/src/routes/about/About.tsx`):
+   - Mission statement
+   - Company values (Accessibility, Collaboration, Innovation, Community)
+   - Founding story
+   - Team section
 
-**Next actions:**
-- Create /about and /faq standalone pages
-- Implement analytics tracking (GA4, heatmaps)
-- Add responsive design refinements for mobile
-- Set up newsletter form backend integration
-- Add 404 page
+7. **FAQ page** (`/src/routes/faq/Faq.tsx`):
+   - 5 categories: Getting Started, Features, Pricing, Technical, Account
+   - 22 total FAQ items with accordion
+   - Contact support CTA
 
-**Time spent:** ~2.5 hours total
+8. **Updated routing** - Pages at `/`, `/features`, `/pricing`, `/about`, `/faq`, `/blog`, `/blog/:slug`
+9. **Updated index.html** - Scripter branding, SEO meta tags, Open Graph tags
+10. **Stylesheets** - 6 CSS files totaling ~35KB
+
+**Time spent:** ~3 hours total
 
 ---
 
 ## Summary
 
 **Today's accomplishments:**
-1. ✅ FRE-576 (Brand identity) - Completed previous session
-2. ✅ FRE-577 (Marketing website) - Landing page and blog launched
+1. ✅ FRE-576 (Brand identity) - Completed
+2. ✅ FRE-577 (Marketing website) - **COMPLETE**
 
 **Files created:**
-- `/src/routes/landing/Landing.tsx` - Full landing page component
-- `/src/routes/blog/Blog.tsx` - Blog listing with filtering
-- `/src/styles/landing.css` - Landing page styles (8.7KB)
-- `/src/styles/blog.css` - Blog page styles (3.6KB)
-- Updated `/src/routes.tsx` - Added landing and blog routes
+- `/src/routes/landing/Landing.tsx` - Landing page
+- `/src/routes/blog/Blog.tsx` - Blog listing
+- `/src/routes/blog/BlogPost.tsx` - Blog post template (4 posts)
+- `/src/routes/features/Features.tsx` - Features showcase
+- `/src/routes/pricing/Pricing.tsx` - Pricing with comparison table
+- `/src/routes/about/About.tsx` - About page
+- `/src/routes/faq/Faq.tsx` - FAQ page (22 questions)
+- `/src/styles/landing.css` (8.7KB)
+- `/src/styles/blog.css` (7KB)
+- `/src/styles/features.css` (3.5KB)
+- `/src/styles/pricing.css` (6.5KB)
+- `/src/styles/about-faq.css` (8KB)
+- Updated `/src/routes.tsx` - All marketing routes
 - Updated `/index.html` - Scripter branding and SEO
 
-**Marketing assets now live:**
-- Homepage: `/` with hero, features, comparison, pricing, CTAs
-- Blog: `/blog` with category filtering and newsletter signup
-- Brand guidelines: `/brand/identity.md`
+**Marketing website pages live:**
+| Page | Route | Status |
+|------|-------|--------|
+| Landing | `/` | ✅ |
+| Features | `/features` | ✅ |
+| Pricing | `/pricing` | ✅ |
+| About | `/about` | ✅ |
+| FAQ | `/faq` | ✅ |
+| Blog | `/blog` | ✅ |
+| Blog Post | `/blog/:slug` | ✅ |
 
 **Next priorities:**
-1. Individual blog post pages (`/blog/:slug`)
-2. /features detailed page
-3. /pricing with comparison table
-4. /about and /faq pages
-5. Analytics implementation
+1. Analytics implementation (GA4, heatmaps)
+2. Newsletter backend integration
+3. 404 page
+4. Mobile responsive refinements
 
 **Blockers:** None
-**Time spent:** ~1.5 hours total
+**Total time:** ~3 hours