Autostart fix

[dantheuber]

Summary

• Autostart reliability (Windows): Fixes "Auto Start with System" not launching Clipless at login, and makes the setting self-healing across upgrades.
• Single instance: Clipless now enforces a single running instance and focuses the existing window instead of launching a duplicate — important when autostart fires while the app is already open.
• Start Minimized: the previously non-functional setting now actually starts the app hidden in the system tray.
• Trustworthy toggle: the General settings toggle now reflects the real OS login-item state, not just the saved preference, so it can't silently drift from what happens at boot.

Added

• Single-instance lock via requestSingleInstanceLock() in the main entry point, plus a second-instance handler that restores/shows/focuses the existing window.
• getAutoStartState() in the autoStart module, exposed through a new auto-start-get-state IPC channel and window.api.getAutoStartState(); the settings toggle now reflects the actual OS login-item state (falls back to the persisted value on Linux/dev).
• startMinimized is now honored on launch — when enabled, the window stays hidden in the system tray.
• Unit tests covering the new dev-guard, legacy-entry migration, and OS-state read paths (100% coverage maintained).

Changed

• AppUserModelId set to com.clipless.app (was the electron-vite template default com.electron). On Windows this value is used as the autostart registry value name, so a unique ID prevents collisions with other Electron apps and stops dev builds from clobbering the installed app's entry.
• applyAutoStart now manages OS login items only in packaged builds (app.isPackaged), so npm run dev and e2e runs no longer register stray login items pointing at node_modules/electron.

Fixed

• "Auto Start with System" failing to launch Clipless at login on Windows. Root causes: the generic, shared com.electron AppUserModelId used as the login-item registry name, and dev/e2e runs writing stray login items into the user's Run key.

Removed

• The legacy com.electron login-item entry is now cleared automatically during reconciliation (self-healing migration to com.clipless.app), so a stale entry can no longer keep launching the app after autostart is turned off — or cause a duplicate launch while it's on.

[github-actions]

📊 Coverage Report

Metric	Coverage
Statements	100%
Branches	100%
Functions	100%
Lines	100%

[github-actions]

🧪 E2E Test Results

✅ 18 passed, 0 failed, 0 skipped

Test Suite	Result
App Launch	✅
Clipboard	✅
Context Menu	✅
Image Clipboard	✅
Quick Clips	✅
Settings	✅
Theme	✅
Settings — Search Terms CRUD	✅
Settings — Quick Tools CRUD	✅
Settings — Templates CRUD	✅
Tools Launcher — Pattern Scanning	✅
Tools Launcher — Clip Templates	✅