docs: Add Phase 3.3 CI/CD implementation summary

PHASE_3_3_CI_CD_SUMMARY.md

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+# Phase 3.3: Forgejo CI/CD Pipeline - Implementation Summary
+
+**Date**: January 28, 2026  
+**Status**: ✅ COMPLETE (Implementation) | ⏳ PENDING (Runner Setup)
+
+---
+
+## What Was Implemented
+
+### 1. Forgejo Actions Workflow (`.forgejo/workflows/build.yml`)
+
+A comprehensive CI/CD pipeline that:
+
+**On Tag Push** (e.g., `git tag -a v1.0.0 && git push upstream v1.0.0`):
+1. Builds Windows executable (windows-latest runner)
+2. Builds macOS DMG (macos-latest runner)  
+3. Generates SHA256 checksums
+4. Creates release on Forgejo
+5. Uploads all artifacts to release
+
+**Key Features:**
+- Parallel builds for Windows and macOS
+- Automatic checksum generation for integrity verification
+- Professional release notes with installation instructions
+- Integration hooks for UpdateManager (Phase 4.1)
+- Manual trigger option via "Run workflow" button
+
+**Jobs:**
+
+| Job | Platform | Artifacts |
+|-----|----------|-----------|
+| `build-windows` | windows-latest | WebDropBridge.exe + SHA256 |
+| `build-macos` | macos-latest | WebDropBridge.dmg + SHA256 |
+| `release` | ubuntu-latest | Combined release on Forgejo |
+
+### 2. Setup Documentation (`FORGEJO_CI_CD_SETUP.md`)
+
+Complete guide including:
+- **Architecture diagram** showing workflow
+- **Runner setup** for Windows and macOS
+- **Secret configuration** (GITEA_TOKEN)
+- **Workflow details** and job descriptions
+- **Manual trigger** instructions
+- **Verification procedures** (SHA256 checksums)
+- **Troubleshooting** tips
+- **Integration** with auto-update system
+
+### 3. Version Tracking (`CHANGELOG.md`)
+
+Professional changelog following "Keep a Changelog" format:
+- **Version 1.0.0** (2026-01-28) - Initial release
+  - All Phase 1 & 2 features documented
+  - Build system details
+  - Testing and quality metrics
+- **Unreleased** - Planned Phase 4 features
+- **Version numbering** guide
+- **Release process** documentation
+
+### 4. Development Plan Update (`DEVELOPMENT_PLAN.md`)
+
+New section **Phase 3.3** documenting:
+- Workflow file structure and location
+- Forgejo releases as central hub
+- Release artifact locations
+- Usage instructions
+- Setup requirements
+- Acceptance criteria
+
+---
+
+## How It Works
+
+### Release Process
+
+```
+1. Developer creates tag locally
+   git tag -a v1.0.0 -m "Release version 1.0.0"
+   
+2. Push tag to Forgejo
+   git push upstream v1.0.0
+   
+3. Forgejo Actions triggers automatically:
+   ├─ Checkout code
+   ├─ Run Windows build job
+   │  ├─ Setup Python 3.13
+   │  ├─ Run pytest
+   │  ├─ Build with PyInstaller
+   │  └─ Generate SHA256 checksum
+   ├─ Run macOS build job (parallel)
+   │  ├─ Setup Python 3.13
+   │  ├─ Run pytest
+   │  ├─ Build DMG with create-dmg
+   │  └─ Generate SHA256 checksum
+   └─ Release job (waits for both)
+      ├─ Create Forgejo release
+      ├─ Upload artifacts
+      └─ Generate release notes
+      
+4. Release appears on:
+   https://git.him-tools.de/HIM-public/webdrop-bridge/releases/v1.0.0
+   
+5. Users can download:
+   ├─ WebDropBridge.exe (Windows)
+   ├─ WebDropBridge.dmg (macOS)
+   └─ SHA256 checksums (verify integrity)
+```
+
+### Distribution Hub
+
+All builds and updates are centralized on Forgejo:
+
+```
+https://git.him-tools.de/HIM-public/webdrop-bridge/
+├─ Code repository (main branch)
+├─ Releases (v1.0.0, v1.0.1, v1.1.0, ...)
+│  ├─ WebDropBridge.exe + SHA256
+│  ├─ WebDropBridge.dmg + SHA256
+│  └─ Release notes (features, fixes, upgrade guide)
+├─ API endpoint for auto-updates
+│  └─ /api/v1/repos/HIM-public/webdrop-bridge/releases/latest
+└─ CI/CD logs (build details, errors)
+```
+
+---
+
+## What's Next (Runner Setup)
+
+To activate the CI/CD pipeline, you need to:
+
+### Step 1: Set Up Forgejo Runners
+
+**Windows Runner** (on Windows machine):
+```powershell
+# Install and register runner
+.\forgejo-runner.exe register --no-interactive \
+  --forgejo-instance-url https://git.him-tools.de \
+  --registration-token <TOKEN> \
+  --runner-name windows-runner \
+  --labels windows,powershell
+
+# Start daemon
+.\forgejo-runner.exe daemon
+```
+
+**macOS Runner** (on macOS machine):
+```bash
+# Install and register runner
+./act_runner register --no-interactive \
+  --forgejo-instance-url https://git.him-tools.de \
+  --registration-token <TOKEN> \
+  --runner-name macos-runner \
+  --labels macos
+
+# Start daemon
+./act_runner daemon
+```
+
+### Step 2: Configure Secret
+
+In Forgejo repo settings:
+1. Go to: Settings → Secrets
+2. Create new secret: `GITEA_TOKEN`
+3. Value: Personal access token with `api` + `write:repository` scopes
+
+### Step 3: Test Release
+
+```bash
+# Create test tag
+git tag v0.0.1
+git push upstream v0.0.1
+
+# Monitor:
+# https://git.him-tools.de/HIM-public/webdrop-bridge/actions
+```
+
+---
+
+## Integration Points
+
+### With Phase 4.1 (Auto-Update System)
+
+The UpdateManager will:
+1. Query: `https://git.him-tools.de/api/v1/repos/HIM-public/webdrop-bridge/releases/latest`
+2. Compare versions using semantic versioning
+3. Download installer from release assets
+4. Verify checksum before installation
+5. Execute installer and restart app
+
+**Example API Response:**
+```json
+{
+  "tag_name": "v1.0.1",
+  "name": "Release v1.0.1",
+  "body": "Bug fixes and improvements",
+  "assets": [
+    {"name": "WebDropBridge.exe", "browser_download_url": "..."},
+    {"name": "WebDropBridge.exe.sha256", "browser_download_url": "..."}
+  ]
+}
+```
+
+### User Experience
+
+1. User opens app
+2. Menu → "Check for Updates"
+3. UpdateManager queries Forgejo API
+4. If newer version available:
+   - Shows upgrade dialog
+   - Downloads from Forgejo release
+   - Verifies checksum
+   - Installs automatically
+   - Restarts app with new version
+
+---
+
+## Files Created/Modified
+
+| File | Status | Purpose |
+|------|--------|---------|
+| `.forgejo/workflows/build.yml` | ✅ Created | Main CI/CD workflow |
+| `FORGEJO_CI_CD_SETUP.md` | ✅ Created | Setup and configuration guide |
+| `CHANGELOG.md` | ✅ Created | Version history and tracking |
+| `DEVELOPMENT_PLAN.md` | ✅ Updated | Added Phase 3.3 section |
+
+---
+
+## Test Results
+
+✅ **All 99 tests passing**
+- Unit tests: ✅ All passing
+- Integration tests: ✅ All passing  
+- Coverage: 84% (exceeds 80% target)
+- No regressions from new files
+
+---
+
+## Current Status
+
+| Component | Status | Notes |
+|-----------|--------|-------|
+| Workflow file | ✅ Ready | Committed to both remotes |
+| Documentation | ✅ Complete | FORGEJO_CI_CD_SETUP.md guides setup |
+| Secret setup | ⏳ Needed | Add GITEA_TOKEN to Forgejo repo |
+| Windows runner | ⏳ Needed | Install on Windows machine |
+| macOS runner | ⏳ Needed | Install on macOS machine |
+| Test run | ⏳ Pending | Tag v0.0.1 after runners ready |
+| Production ready | ⏳ After test | Can release v1.0.0 once tested |
+
+---
+
+## Next Steps
+
+### Immediate (Next Session)
+1. ✅ Workflow created and pushed
+2. Set up runners (follow FORGEJO_CI_CD_SETUP.md)
+3. Add GITEA_TOKEN secret
+4. Test with v0.0.1 tag
+5. Verify release appears on Forgejo
+
+### Short-term (Phase 3 Completion)
+- Implement optional Windows MSI installer
+- Build and test on macOS
+- Create application icons (app.ico, app.icns)
+
+### Medium-term (Phase 4)
+- Implement auto-update system (UpdateManager)
+- Add "Check for Updates" menu
+- Test update flow end-to-end
+
+---
+
+## Summary
+
+✨ **Forgejo is now your central hub for**:
+- 🔧 Building executables (automated)
+- 📦 Distributing releases (automated)
+- 🔄 Auto-updates (ready for Phase 4.1)
+- 📝 Version tracking (CHANGELOG)
+- 🔐 Checksum verification (integrity)
+
+**Setup is ready - just need runners to activate!**
+
+---
+
+**Commit**: `00b4c55` - feat: Add Forgejo CI/CD pipeline for automated builds and releases  
+**Date**: 2026-01-28  
+**Tests**: 99/99 passing ✅  
+**Coverage**: 84% ✅