Backend changes:
- Add last_repo field to UserResponse in auth.go:27
- Update GetCurrentUser to include last_repo in response (auth.go:238)
- Update router to use POST /api/user/repo instead of /api/auth/last-repo (router.go:63)
- Implement empty folder filtering in github.go ListFiles function
- Add hasMatchingFiles helper to recursively check for matching files

Frontend changes:
- Simplify SetupWizard: remove 2-step wizard, default to root folder
- Add API call to save last_repo when completing setup
- Create new /select-repo page with SetupWizard component
- Update DashboardApp to check for last_repo from user data or URL params
- Redirect to /select-repo if no repo is configured
- Update 'Change repository' button to link to /select-repo
- Add last_repo field to User type in api.ts

This implements items 1-4 from the plan:
1. Save & Load Last Repo - Backend returns last_repo, frontend saves it via API
2. Remove Folder Selection - Setup wizard now single-step, defaults to root
3. Filter Empty Folders - Backend only returns folders with markdown files
4. Separate Repo Selection URL - New /select-repo page for repo selection

- Add last_repo column to users table schema in migration
- Fix CreateUser query to include last_repo value in INSERT
- Fix GetUserByGithubID and GetUserByID to scan last_repo field
- Fix UpdateUserRepo to use last_repo instead of lastRepo
- Standardize all SQL queries to use snake_case (last_repo) consistently

- Create reusable Loading and EmptyState components with brutalist design
- Replace basic spinners with styled Loading component throughout app
- Add EmptyState for no files/repos scenarios with helpful messaging
- Install and integrate sonner for toast notifications
- Add toast notifications for save errors, publish success/failures
- Update DashboardApp to include Toaster with custom styling
- Improve error handling in EditorContainer and SetupWizard
- Create comprehensive README.md with features, setup, architecture
- Create detailed SETUP.md with deployment guides and troubleshooting
- Update .env.example to match backend environment variables
- Fix docker-compose.yml environment variables and health checks
- Update frontend port from 4321 to 3000 in docker-compose

This completes Phase 4 polish and documentation tasks.

- Create multi-stage Dockerfile for backend (alpine, <50MB)
- Create Dockerfile for frontend with nginx
- Add nginx configuration with gzip, caching, and security headers
- Create docker-compose.yml with health checks and volumes
- Add Makefile with common commands (build, up, down, logs, etc.)
- Add .dockerignore files for both services
- Configure environment variables in docker-compose
- Add health check endpoints for monitoring

- Create branch API client with status and publish endpoints
- Add useBranchStatus and usePublish React Query hooks
- Create PublishDialog component with commit and PR inputs
- Create PublishSuccessDialog showing PR link and commit info
- Integrate publish flow into EditorContainer
- Add Publish button that creates PRs from edited files
- Disable publish button when there are unsaved changes
- Show branch status and edited files in publish dialog
- Display success message with link to created PR

- Install go-git library for git operations
- Create GitOperations module with clone, branch, commit, push functions
- Implement BranchManager with 4-hour branch reuse logic
- Add branch state database queries (save, get, delete)
- Create branch status endpoint (GET /api/repos/:owner/:repo/branch/status)
- Create publish endpoint (POST /api/repos/:owner/:repo/publish)
- Publish endpoint handles commit, push, and PR creation
- Auto-delete drafts after successful publish

- Install TipTap editor with markdown extensions (StarterKit, Typography, Link, CodeBlock)
- Create TipTapEditor component with custom styling matching design system
- Create MenuBar component with formatting controls
- Create FrontmatterEditor component for YAML metadata editing
- Create EditorContainer component managing editor state and auto-save
- Add file content API client and React Query hooks
- Implement debounced auto-save (2 second delay)
- Add unsaved changes warning before page unload
- Integrate editor into DashboardApp
- Convert HTML to markdown using turndown library

- Implement YAML frontmatter parser with Parse and Serialize functions
- Update GetFileContent to parse frontmatter from markdown files
- Add PUT endpoint for saving file drafts to SQLite
- Add database queries for draft content (save, get, delete)
- Modify GetFileContent to return draft content if available
- Support auto-save workflow for markdown editing

- Add UNIQUE(user_id, provider) constraint to auth_tokens table
- This is required for the ON CONFLICT clause in SaveAuthToken
- Fixes SQL logic error when saving OAuth tokens
- Users must be re-authenticated after this migration

- Log access token presence and length after FetchUser
- Log token details before SaveAuthToken
- Make SaveAuthToken failure a critical error that stops the flow
- Capture access token from Authorize call
- Use access token from Authorize if not present in gothUser
- This will help diagnose why tokens aren't being saved

- Add 'affiliation' parameter to GitHub API call to include all repos
- Include owner, collaborator, and organization_member repositories
- Add detailed error logging with status codes
- Log token prefix for debugging
- Log successful repository count
- This ensures users see all repos they have access to, not just owned

Step 1: Repository Selection
- Fetch and display all user repositories in a dropdown
- Add sort options: recently updated, recently created, by name
- Show loading state while fetching repositories
- Show error state if fetch fails
- Display repository count

Step 2: Folder Selection
- Fetch all directories from selected repository
- Display folders in dropdown with emoji icons
- Default option: root directory (all markdown files)
- Show loading state while fetching folders
- Show helpful message if no folders found

Benefits:
- No typing errors - users select from actual repositories
- Better UX - see what actually exists
- Automatic validation - can only select real repos/folders

- Replace repository dropdown with 2-step setup wizard
- Step 1: User enters repository owner and name manually
- Step 2: User configures folder path for blog posts
- Show repository config in sidebar with option to change
- Better UX: users explicitly configure what they want to edit
- Fixes 'Failed to load repositories' issue by not loading all repos

- Replace gothic.BeginAuthHandler/CompleteUserAuth with direct goth provider calls
- This gives us better control over session storage and state management
- Add detailed logging to debug cookie flow
- Fix gothic session store options initialization
- Add compiled binary to .gitignore
- Session cookies now properly persist between login and callback

- Add SameSite=Lax for OAuth cookie compatibility
- Log cookies in BeginAuth and CallbackAuth for debugging
- Add better error message when session expires
- Redirect to home with error on session expiry

- Initialize gothic.Store with CookieStore using SESSION_SECRET
- Configure session options for gothic (MaxAge, HttpOnly, Secure)
- This fixes the 'hash key is not set' error
- Gothic needs its own session store separate from our custom session management

- Add provider=github query parameter in BeginAuth handler
- Add provider=github query parameter in CallbackAuth handler
- This fixes the 'you must select a provider' error from gothic
- Gothic needs the provider name in the request context

- Build Header component with user info and logout button
- Create RepoSelector with sorting options (updated, created, name)
- Implement FileTree with recursive folder expansion
* Shows file/folder icons
* Highlights selected file
* Supports nested directory structure
- Build main Dashboard component with:
* Three-column layout (sidebar + main content)
* Repository selection interface
* File tree navigation
* Empty states for no repo/file selected
* Loading states with skeleton animations
* Placeholder for editor (Phase 2)
- Set up React Query provider for data management
- Use client:only directive for React hydration
- Build test successful

- Install axios and @tanstack/react-query
- Create TypeScript types for API responses (User, Repository, FileNode, etc.)
- Set up axios client with baseURL and credential support
- Add response interceptor for 401 redirect handling
- Implement auth API functions (getCurrentUser, logout)
- Implement repos API functions (listRepositories, listFiles, getFileContent)
- Create React Query hooks for data fetching:
* useCurrentUser - fetch authenticated user
* useLogout - logout mutation
* useRepositories - fetch repos with sorting
* useFiles - fetch file tree with extension filtering
* useFileContent - fetch individual file content
- All hooks use proper query keys and enabled conditions

- Create connector interface for future multi-backend support
- Implement GitHubConnector using go-github library
- Add repository listing with sorting support (updated, created, name)
- Implement recursive file tree traversal with extension filtering
- Add file content retrieval endpoint
- Create RepoHandler with three endpoints:
* GET /api/repos - list user repositories
* GET /api/repos/:owner/:repo/files - list files in repo
* GET /api/repos/:owner/:repo/files/* - get file content
- Wire up handlers in router with authentication middleware
- Build test successful

- Design with editorial/magazine aesthetic using Archivo Black and Crimson Pro fonts
- Implement bold amber-to-red gradient color scheme (avoiding purple clichés)
- Add custom animations (float, slide-in with stagger delays)
- Create geometric visual elements with diagonal cuts and shapes
- Build browser mockup with rotation hover effect
- Add grain texture overlay for refined feel
- Include features section with glassmorphism cards
- Use rounded-none buttons for brutalist edge
- Implement responsive grid layout
- Add GitHub icon with rotation on hover
- Fix Tailwind CSS version compatibility (downgrade to v3)
- Build test successful

- Add @astrojs/react and @astrojs/tailwind integrations
- Configure Tailwind CSS with custom theme variables
- Add shadcn/ui configuration with components.json
- Create utility function for class merging (cn helper)
- Implement button component with variants using CVA
- Add global styles with CSS variables for theming
- Configure Bun as package manager

- Implement GitHub OAuth provider setup with goth
- Add session management with encrypted cookies
- Create authentication middleware for protected routes
- Implement auth handlers (login, callback, user info, logout)
- Set up chi router with CORS support
- Add logging middleware for HTTP requests
- Create health check endpoint
- Integrate all components into main server
- Build test successful

- Create database package with connection pooling and WAL mode
- Add comprehensive database schema (users, auth_tokens, branch_states, draft_content)
- Implement migration runner using embedded SQL files
- Add data models for all database tables
- Create query functions for user and auth token operations
- Integrate database initialization into main server startup
- Build test successful

- Create backend directory structure with organized internal packages
- Add main.go with basic HTTP server and graceful shutdown
- Configure Go modules and add godotenv dependency
- Create Makefile with common development tasks
- Add .env.example with all configuration options
- Add .gitignore for backend artifacts
- Build test successful