docs: Update QUICKSTART and START_HERE documentation to reflect Phase 4 completion and Phase 5 readiness

QUICKSTART.md

@@ -70,29 +70,45 @@ webdrop-bridge/
 └── Makefile                     ← Convenience commands
 ```
 
-## Development Workflow
+## Current Status
 
-### Phase 1: Core Components (Now)
+**Phase 4 is COMPLETE** - All core features and professional features implemented!
 
-The project is structured to begin implementing core components. Start with:
+### What's Already Implemented
 
-1. **Configuration System** (`src/webdrop_bridge/config.py`)
-   - Environment-based configuration
-   - Validation and defaults
+**Phase 1-3 (Core Features):**
+- ✅ Configuration system with JSON file support & profiles
+- ✅ Path validator with whitelist-based security
+- ✅ Drag interceptor for web-to-file conversion
+- ✅ Main window with toolbar and WebEngine integration
+- ✅ Windows MSIX and macOS DMG build automation
+- ✅ 99+ unit tests with 85%+ coverage
 
-2. **Path Validator** (`src/webdrop_bridge/core/validator.py`)
-   - Whitelist-based path validation
-   - Security checks
+**Phase 4.1 (Auto-Update System - Feb 2026):**
+- ✅ Update manager with Forgejo API integration
+- ✅ Update UI dialogs and status bar integration
+- ✅ Automatic background update checking
+- ✅ 76 tests, 79% coverage
 
-3. **Drag Interceptor** (`src/webdrop_bridge/core/drag_interceptor.py`)
-   - Qt drag-and-drop handling
-   - Text-to-file conversion
+**Phase 4.2 (Enhanced Logging - Feb 2026):**
+- ✅ Structured JSON logging with rotation
+- ✅ Performance metrics tracking
+- ✅ Log archival with 30-day retention
+- ✅ 20 tests, 91% coverage
 
-4. **Main Window** (`src/webdrop_bridge/ui/main_window.py`)
-   - Qt application window
-   - WebEngine integration
+**Phase 4.3 (Advanced Configuration - Feb 2026):**
+- ✅ Configuration profiles (work, personal, etc.)
+- ✅ Settings dialog with 5 organized tabs
+- ✅ Configuration validation & import/export
+- ✅ 43 tests, 87% coverage
 
-See [DEVELOPMENT_PLAN.md](DEVELOPMENT_PLAN.md#phase-1-foundation-weeks-1-4) for detailed specifications.
+### Next Steps (Phase 5)
+
+See [DEVELOPMENT_PLAN.md Phase 5](DEVELOPMENT_PLAN.md#phase-5-post-release-months-2-3) for:
+- Release candidate testing
+- Cross-platform validation
+- Performance optimization
+- Final packaging and deployment
 
 ## Common Tasks
 
@@ -219,11 +235,43 @@ Edit as needed:
 
 ## Next Steps
 
-1. **Read** [DEVELOPMENT_PLAN.md](DEVELOPMENT_PLAN.md) for detailed roadmap
-2. **Review** [docs/ARCHITECTURE.md](docs/ARCHITECTURE.md) for design decisions
-3. **Start** with Phase 1 core components
-4. **Write tests** for new code (TDD approach)
-5. **Follow** guidelines in [CONTRIBUTING.md](CONTRIBUTING.md)
+**Phase 4 is complete!** Here's what you can do:
+
+### To Run the Application
+```bash
+# Run the full application (requires config)
+python -m webdrop_bridge.main
+```
+
+### To Run Tests
+```bash
+# Run all tests
+pytest tests -v
+
+# Run with coverage
+pytest --cov=src/webdrop_bridge tests
+
+# Run specific test file
+pytest tests/unit/test_config.py -v
+```
+
+### To Explore Phase 4 Features
+1. **Auto-Update System** → See `src/webdrop_bridge/core/updater.py`
+2. **Enhanced Logging** → See `src/webdrop_bridge/utils/logging.py`
+3. **Configuration Profiles** → See `src/webdrop_bridge/core/config_manager.py`
+4. **Settings Dialog** → See `src/webdrop_bridge/ui/settings_dialog.py`
+
+### To Prepare for Phase 5
+1. **Read** [DEVELOPMENT_PLAN.md Phase 5](DEVELOPMENT_PLAN.md#phase-5-post-release-months-2-3)
+2. **Review** [CHANGELOG.md](CHANGELOG.md) for v1.0.0 Phase 4 additions
+3. **Test on multiple platforms** - Windows, macOS
+4. **Report issues** via GitHub/Forgejo issues
+
+### To Contribute
+1. **Review** [CONTRIBUTING.md](CONTRIBUTING.md)
+2. **Choose a Phase 5 task** or bug fix
+3. **Follow TDD** - write tests first
+4. **Run quality checks** → `tox`
 
 ## Getting Help
 
@@ -234,4 +282,4 @@ Edit as needed:
 
 ---
 
-**Ready to start?** → Open `DEVELOPMENT_PLAN.md` Phase 1 section
+**Phase 4 Complete!** → Next: [DEVELOPMENT_PLAN.md Phase 5](DEVELOPMENT_PLAN.md#phase-5-post-release-months-2-3) Release Candidates