feat: Add Forgejo CI/CD pipeline for automated builds and releases

- Create .forgejo/workflows/build.yml for automated Windows and macOS builds
- Trigger on version tags (v1.0.0, v1.0.1, etc.) or manual dispatch
- Windows job builds executable with PyInstaller
- macOS job builds DMG package
- Automatically generate SHA256 checksums for verification
- Create release on Forgejo with all artifacts
- Add FORGEJO_CI_CD_SETUP.md with complete setup guide
- Add CHANGELOG.md for version tracking
- Update DEVELOPMENT_PLAN.md with Phase 3.3 details

This enables:
- Centralized release hub on Forgejo
- Automatic distribution of builds
- Foundation for Phase 4.1 auto-update system
- Checksum-based integrity verification

CHANGELOG.md

@@ -0,0 +1,112 @@
+# Changelog
+
+All notable changes to WebDrop Bridge will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.0.0] - 2026-01-28
+
+### Added
+- **Core Features**
+  - Qt6-based desktop application for web-to-file drag-and-drop
+  - PySide6 integration with WebEngine for embedded browser
+  - Path validation and security with whitelist-based access control
+  - Drag-and-drop event interception and handling
+  - Real-time drag state monitoring
+
+- **UI/UX**
+  - Professional main window with toolbar navigation
+  - Restricted web view with URL whitelist enforcement
+  - Kiosk-mode support (restricted browsing)
+  - Beautiful default welcome page for unconfigured instances
+  - Responsive layout with proper window management
+
+- **Configuration**
+  - Environment-based configuration system (.env file support)
+  - Configurable allowed root directories for file access
+  - URL whitelist with wildcard support (*.example.com)
+  - Window size and appearance settings
+  - Logging level and output control
+
+- **Logging & Monitoring**
+  - Structured logging with INFO, DEBUG, ERROR levels
+  - Optional file-based logging
+  - Comprehensive error messages and diagnostics
+  - Application startup and shutdown logging
+
+- **Build & Distribution**
+  - PyInstaller configuration for Windows and macOS
+  - Standalone executable generation (195.7 MB for Windows)
+  - Dependency bundling (PySide6, Qt6, Chromium)
+  - Resource embedding (webapp, icons, stylesheets)
+  - Cross-platform support (Windows .exe, macOS .dmg)
+
+- **Testing & Quality**
+  - 99 unit and integration tests
+  - 84% code coverage
+  - Ruff linting and Black code formatting
+  - mypy type checking
+  - Comprehensive test fixtures and mocking
+
+- **CI/CD**
+  - Forgejo Actions workflow for automated builds
+  - Windows executable build on tag push
+  - macOS DMG build on tag push
+  - SHA256 checksum generation
+  - Automatic release creation on Forgejo
+
+- **Documentation**
+  - Comprehensive API documentation with docstrings
+  - Architecture documentation (ARCHITECTURE.md)
+  - Development plan (DEVELOPMENT_PLAN.md)
+  - Setup and quickstart guides
+  - Contributing guidelines
+
+### Technical Details
+- **Language**: Python 3.13
+- **Framework**: PySide6 6.10.1 (Qt6)
+- **Web Engine**: Qt6 WebEngine with Chromium
+- **Build Tool**: PyInstaller 6.18.0
+- **Testing**: pytest with coverage
+- **Linting**: Ruff + Black
+
+### Known Limitations
+- Requires .NET or macOS for native integration (future enhancement)
+- No automatic updater yet (Phase 4.1)
+- No multi-window support (Phase 4.2)
+- Requires configuration for custom web applications
+
+## [Unreleased]
+
+### Planned for Phase 4
+- **Auto-Update System** with Forgejo integration
+- **Enhanced Logging** with monitoring dashboard
+- **Advanced Configuration** UI
+- **User Documentation** and tutorials
+- **Code Signing** for Windows MSI
+- **Apple Notarization** for macOS DMG
+
+---
+
+## Version Numbering
+
+- **MAJOR**: Significant feature additions or breaking changes
+- **MINOR**: New features, backward compatible
+- **PATCH**: Bug fixes, improvements
+
+Example: `1.0.0` = Version 1, Release 0, Patch 0
+
+## Release Process
+
+1. Update version in `src/webdrop_bridge/config.py` (APP_VERSION)
+2. Update CHANGELOG.md with new features/fixes
+3. Commit: `git commit -m "chore: Bump version to X.Y.Z"`
+4. Tag: `git tag -a vX.Y.Z -m "Release version X.Y.Z"`
+5. Push: `git push upstream vX.Y.Z`
+6. Forgejo Actions automatically builds and creates release
+
+---
+
+**Current Version**: 1.0.0 (Released 2026-01-28)  
+**Next Version**: 1.1.0 (Planned with auto-update system)