docs: Address Micropub design issues and clarify V1 scope

- Create ADR-029 for IndieAuth/Micropub integration strategy
- Address all critical issues from developer review:
  - Add missing 'me' parameter to token endpoint
  - Clarify PKCE as optional extension
  - Define token security migration strategy
  - Add authorization_codes table schema
  - Define property mapping rules
  - Clarify two authentication flows
- Simplify V1 scope per user decision:
  - Remove update/delete operations from V1
  - Focus on create-only functionality
  - Reduce timeline from 8-10 to 6-8 days
- Update project plan with post-V1 roadmap:
  - Phase 11: Update/delete operations (V1.1)
  - Phase 12: Media endpoint (V1.2)
  - Phase 13: Advanced IndieWeb features (V2.0)
  - Phase 14: Enhanced features (V2.0+)
- Create token security migration documentation
- Update ADR-028 for consistency with simplified scope

BREAKING CHANGE: Token migration will invalidate all existing tokens for security

docs/projectplan/v1/implementation-plan.md

@@ -1278,6 +1278,122 @@ Final steps before V1 release.
 
 ---
 
+## Post-V1 Roadmap
+
+### Phase 11: Micropub Extended Operations (V1.1)
+
+**Priority**: HIGH for V1.1 release
+**Estimated Effort**: 4-6 hours
+**Dependencies**: Phase 6 (Micropub Core) must be complete
+
+#### 11.1 Update Operations
+- [ ] Implement `action=update` handler in `/micropub`
+  - Support replace operations (replace entire property)
+  - Support add operations (append to array properties)
+  - Support delete operations (remove from array properties)
+  - Map Micropub properties to StarPunk note fields
+  - Validate URL belongs to this StarPunk instance
+  - **Acceptance Criteria**: Can update posts via Micropub clients
+
+#### 11.2 Delete Operations
+- [ ] Implement `action=delete` handler in `/micropub`
+  - Soft delete implementation (set deleted_at timestamp)
+  - URL validation and slug extraction
+  - Authorization check (delete scope required)
+  - Proper 204 No Content response
+  - **Acceptance Criteria**: Can delete posts via Micropub clients
+
+#### 11.3 Extended Scopes
+- [ ] Add "update" and "delete" to SUPPORTED_SCOPES
+- [ ] Update authorization form to display requested scopes
+- [ ] Implement scope-specific permission checks
+- [ ] Update token endpoint to validate extended scopes
+- [ ] **Acceptance Criteria**: Fine-grained permission control
+
+### Phase 12: Media Endpoint (V1.2)
+
+**Priority**: MEDIUM for V1.2 release
+**Estimated Effort**: 6-8 hours
+**Dependencies**: Micropub core functionality
+
+#### 12.1 Media Upload Endpoint
+- [ ] Create `/micropub/media` endpoint
+- [ ] Handle multipart/form-data file uploads
+- [ ] Store files in `/data/media/YYYY/MM/` structure
+- [ ] Generate unique filenames to prevent collisions
+- [ ] Image optimization (resize, compress)
+- [ ] Return 201 Created with Location header
+- [ ] **Acceptance Criteria**: Can upload images via Micropub clients
+
+#### 12.2 Media in Posts
+- [ ] Support photo property in Micropub create/update
+- [ ] Embed images in Markdown content
+- [ ] Update templates to display images properly
+- [ ] Add media-endpoint to Micropub config query
+- [ ] **Acceptance Criteria**: Posts can include images
+
+### Phase 13: Advanced IndieWeb Features (V2.0)
+
+**Priority**: LOW - Future enhancement
+**Estimated Effort**: 10-15 hours per feature
+**Dependencies**: All V1.x features complete
+
+#### 13.1 Webmentions
+- [ ] Receive webmentions at `/webmention` endpoint
+- [ ] Verify source links to target
+- [ ] Extract microformats from source
+- [ ] Store webmentions in database
+- [ ] Display webmentions on posts
+- [ ] Send webmentions on publish
+- [ ] Moderation interface in admin
+
+#### 13.2 Syndication (POSSE)
+- [ ] Add syndication targets configuration
+- [ ] Support mp-syndicate-to in Micropub
+- [ ] Implement Mastodon syndication
+- [ ] Implement Twitter/X syndication (if API available)
+- [ ] Store syndication URLs in post metadata
+- [ ] Display syndication links on posts
+
+#### 13.3 IndieAuth Server
+- [ ] Implement full authorization server
+- [ ] Allow StarPunk to be identity provider
+- [ ] Profile URL verification
+- [ ] Client registration/discovery
+- [ ] Token introspection endpoint
+- [ ] Token revocation endpoint
+- [ ] Refresh tokens support
+
+### Phase 14: Enhanced Features (V2.0+)
+
+**Priority**: LOW - Long-term vision
+**Estimated Effort**: Variable
+
+#### 14.1 Multiple Post Types
+- [ ] Articles (long-form with title)
+- [ ] Replies (in-reply-to support)
+- [ ] Likes (like-of property)
+- [ ] Bookmarks (bookmark-of property)
+- [ ] Events (h-event microformat)
+- [ ] Check-ins (location data)
+
+#### 14.2 Multi-User Support
+- [ ] User registration system
+- [ ] Per-user permissions and roles
+- [ ] Separate author feeds (/author/username)
+- [ ] Multi-author Micropub (me verification)
+- [ ] User profile pages
+
+#### 14.3 Advanced UI Features
+- [ ] WYSIWYG Markdown editor
+- [ ] Draft/schedule posts
+- [ ] Batch operations interface
+- [ ] Analytics dashboard
+- [ ] Theme customization
+- [ ] Plugin system
+
+---
+
 ## Summary Checklist
 
 ### Core Features (Must Have)