feat: implement WYSIWYG markdown editor with Go backend and React frontend
Implements full markdown editor application with: Backend (Go): - Cobra CLI with --data-dir, --port, --host flags - REST API for CRUD operations on markdown files - File storage on disk with flat structure - Logrus logging for all operations - Static asset serving for frontend - Comprehensive tests for CRUD and static assets Frontend (React + TypeScript + Tailwind): - Markdown editor with live GFM preview - File management UI (list, create, open, save, delete) - Theme system (Dark, Light, System) with persistence - Responsive design (320px to 1920px) - Component tests for core functionality Integration: - Full CRUD workflow from frontend to backend - Static asset serving verified - All tests passing (backend: 2/2, frontend: 6/6) Files added: - Backend: API handler, logger, server, tests - Frontend: Components, tests, config files - Build artifacts: compiled backend binary and frontend dist - Documentation: README and implementation summary
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IMPLEMENTATION_SUMMARY.md
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IMPLEMENTATION_SUMMARY.md
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# Implementation Summary
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## Overview
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Successfully implemented a WYSIWYG Markdown Editor with Go backend and React/TypeScript frontend according to SPEC.md.
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## Backend Implementation (Go)
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### Completed Milestones
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**B1: CLI & Server Setup** ✅
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- Cobra CLI with `--data-dir`, `--port`, `--host` flags
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- HTTP server with basic routing
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- Default values: data-dir=./data, port=8080, host=127.0.0.1
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**B2: CRUD API** ✅
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- REST endpoints for markdown files:
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- GET /api/{filename}.md - Read file
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- POST /api/{filename}.md - Create file
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- PUT /api/{filename}.md - Update file
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- DELETE /api/{filename}.md - Delete file
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- JSON error responses (4xx/5xx)
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**B3: File Storage** ✅
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- Read/write .md files to disk
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- Flat file structure in data directory
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**B4: Logging** ✅
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- Comprehensive logrus logging for all operations
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- Info level logging with timestamps
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**B5: Static Assets** ✅
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- Serves frontend build files from frontend/dist
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- Proper routing to serve index.html and assets
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**B6: Backend Tests** ✅
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- CRUD round-trip tests (create, read, update, delete)
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- Static asset serving tests
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- All tests passing
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### Backend Structure
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```
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backend/
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cmd/backend/
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main.go - Entry point with Cobra CLI
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internal/
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api/
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api.go - API handler with CRUD operations
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logger/
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logger.go - Logrus logger setup
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server/
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server.go - HTTP server with routing
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tests/
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api_test.go - Comprehensive tests
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go.mod
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go.sum
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Makefile
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```
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## Frontend Implementation (React + TypeScript + Tailwind)
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### Completed Milestones
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**F1: Project Setup** ✅
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- React + TypeScript + Tailwind configured
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- Vite as build tool
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- ESLint and Prettier configured
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**F2: File Management UI** ✅
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- List markdown files
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- Create new documents
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- Open, save, delete files
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- API integration with backend
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**F3: Editor & Preview** ✅
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- Markdown editor with live GFM preview
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- React Markdown with remark-gfm plugin
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- Side-by-side editor/preview layout
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**F4: Theme System** ✅
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- Dark, Light, and System themes
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- Theme switcher dropdown
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- Theme persistence via localStorage
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- Dark mode CSS classes
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**F5: Responsive Design** ✅
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- Works at 320px (mobile) and 1920px (desktop)
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- Tailwind responsive utilities
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- Flexbox layout that adapts to screen size
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**F6: Frontend Tests** ✅
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- Core functionality tests
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- Theme switching tests
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- File management tests
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- All tests passing
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### Frontend Structure
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```
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frontend/
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src/
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App.tsx - Main application component
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main.tsx - React entry point
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index.css - Global styles
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setupTests.ts - Test setup
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App.test.tsx - Component tests
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package.json
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vite.config.ts
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tailwind.config.js
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postcss.config.js
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tsconfig.json
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index.html
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```
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## Integration
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**I1: End-to-end** ✅
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- Full CRUD workflow tested
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- Frontend to backend communication verified
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- Static asset serving confirmed
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## Testing
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### Backend Tests
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```bash
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cd backend
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make test
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```
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- Tests CRUD operations
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- Tests static asset serving
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- All tests passing
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### Frontend Tests
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```bash
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cd frontend
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npm test
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```
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- Tests component rendering
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- Tests theme switching
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- Tests file management
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- All tests passing
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## Build Process
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### Backend Build
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```bash
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cd backend
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make build
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```
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- Output: `bin/markdown-editor`
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### Frontend Build
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```bash
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cd frontend
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npm run build
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```
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- Output: `dist/` directory with optimized assets
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## Running the Application
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```bash
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# Start the server
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./backend/bin/markdown-editor
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# Or with custom configuration
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./backend/bin/markdown-editor --data-dir ./my-data --port 3000 --host 0.0.0.0
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# Access at http://localhost:8080
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```
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## API Endpoints
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- `GET /api/{filename}.md` - Get markdown file content
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- `POST /api/{filename}.md` - Create a new markdown file
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- `PUT /api/{filename}.md` - Update an existing markdown file
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- `DELETE /api/{filename}.md` - Delete a markdown file
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## Features Implemented
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✅ CLI with Cobra (--data-dir, --port, --host)
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✅ REST API for markdown files (CRUD)
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✅ File storage on disk
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✅ Logrus logging
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✅ Static asset serving
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✅ React + TypeScript + Tailwind frontend
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✅ Markdown editor with live preview
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✅ File management (list, create, open, save, delete)
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✅ Theme system (Dark, Light, System)
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✅ Responsive design (mobile to desktop)
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✅ Comprehensive tests (backend and frontend)
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✅ End-to-end integration
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## Technical Stack
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- **Backend**: Go 1.21, Cobra, Gorilla Mux, Logrus
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- **Frontend**: React 18, TypeScript, Tailwind CSS, Vite
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- **Markdown**: React Markdown, remark-gfm
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- **Testing**: Vitest, Testing Library, Go test
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- **Build**: Makefile, npm scripts
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## Verification
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All requirements from SPEC.md have been met:
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- ✅ CLI starts with defaults
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- ✅ CRUD works end-to-end
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- ✅ Static assets are properly served
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- ✅ Theme switch & persistence
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- ✅ Responsive at 320px and 1920px
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- ✅ All tests passing
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