Implement SyncWarden v0.1.0

Full Syncthing tray wrapper with:
- System tray with 5 icon states (idle/syncing/paused/error/disconnected)
- Syncthing REST API client with auto-discovered API key
- Long-polling event listener for real-time status
- Transfer rate monitoring, folder tracking, recent files, conflict counting
- Full context menu with folders, recent files, settings toggles
- Embedded admin panel binary (webview, requires CGO)
- OS notifications via beeep (per-event configurable)
- Syncthing process management with auto-restart
- Cross-platform installer with autostart
- CI pipeline for Linux (.deb + .tar.gz) and Windows (.zip)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

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+# SyncWarden
+
+Lightweight system tray wrapper for [Syncthing](https://syncthing.net/). Cross-platform, native-feeling, ~10 MB.
+
+## Features
+
+- **Tray icon** with 5 states: idle (green), syncing (blue), paused (gray), error (red), disconnected (dark gray)
+- **Real-time monitoring** via Syncthing event API (long-polling)
+- **Transfer rates** in tooltip and menu
+- **Context menu**: folder list, recent files, conflict counter, pause/resume, rescan, restart
+- **Embedded admin panel** using the system browser engine (Edge WebView2 / WebKit / WebKit2GTK)
+- **OS notifications** for sync complete, device connect/disconnect, new device requests, conflicts
+- **Settings** toggleable via menu checkboxes (persisted to JSON config)
+- **Auto-start Syncthing** with crash recovery
+- **API key auto-discovery** from Syncthing's config.xml
+
+## Architecture
+
+| Binary | Purpose |
+|--------|---------|
+| `syncwarden` | Tray icon, menu, API polling, notifications, process management |
+| `syncwarden-panel` | Embedded browser showing Syncthing admin panel |
+| `syncwarden-setup` | Cross-platform installer |
+
+Separate binaries avoid main-thread conflicts between systray and webview.
+
+## Installation
+
+### From release
+
+Download the latest release for your platform and run `syncwarden-setup`.
+
+### From source
+
+Requires Go 1.24+ and CGO (MinGW-w64 on Windows for the panel binary).
+
+```bash
+# Tray binary (pure Go on Windows)
+go build -o syncwarden ./cmd/syncwarden
+
+# Panel binary (requires CGO + C++ compiler)
+CGO_ENABLED=1 go build -o syncwarden-panel ./cmd/panel
+
+# Setup
+go build -o syncwarden-setup ./cmd/setup
+```
+
+## Configuration
+
+Config file location:
+- **Windows**: `%LOCALAPPDATA%\syncwarden\config.json`
+- **Linux**: `~/.config/syncwarden/config.json`
+- **macOS**: `~/Library/Application Support/syncwarden/config.json`
+
+The API key is auto-discovered from Syncthing's config.xml on first run. All settings are configurable via the tray menu.
+
+## Dependencies
+
+- [energye/systray](https://github.com/energye/systray) — System tray
+- [webview/webview_go](https://github.com/webview/webview_go) — Embedded browser
+- [fogleman/gg](https://github.com/fogleman/gg) — Icon rendering
+- [gen2brain/beeep](https://github.com/gen2brain/beeep) — OS notifications
+
+## License
+
+MIT