[ttncode]

Replaces the Chrome extension with a Windows desktop app built on Tauri 2.

• Same UI from extension/; storage moves to one JSON file in %APPDATA%\com.ttncode.notelet, written atomically with a .bak copy; damaged files are moved aside, never overwritten.
• Global shortcut Ctrl+Alt+N (changeable in the shortcut editor), tray icon, hide on close, start with Windows.
• Auto-update from GitHub Releases at start, plus tray → Check for updates. Pending edits are saved before Quit or an update; a failed save cancels it.
• WebView2 browser keys turned off so every in-app shortcut works as before.
• CI on Windows: unit tests, cargo test, clippy, release build, end-to-end tests that press every default shortcut in the built app.

Manual checklist (Windows, after the v0.7.0 release)

• Install from the release; SmartScreen warns once ("More info" → "Run anyway")
• Ctrl+Alt+N from another app shows / hides Notelet
• Change the global key in the shortcut editor; a key another app holds shows the message and keeps the old key
• X hides to the tray; tray click, Open, Check for updates, Start with Windows, Quit all work
• After a reboot Notelet starts hidden in the tray
• Window size and position are restored after a restart
• Physical keyboard: F5, Ctrl+R, Ctrl+P, Ctrl+±, Ctrl+F (no find bar), Ctrl+Shift+I do nothing browser-like
• Alt+← / Alt+→ and the mouse side buttons step back / forward exactly one screen
• Type, then immediately tray → Quit; reopen: the text is there
• Export opens a Save dialog; the file imports again
• Import a real backup from the extension: every note, sprint, setting and custom key is present
• Update: tag v0.7.1, restart Notelet → it updates itself; type during the update → text kept; tray → Check for updates → "latest version"

🤖 Generated with Claude Code