feat: tooltips, two-column timer, font selector, tray behavior, icons, readme

- Custom tooltip directive (WCAG AAA) on every button in the app
- Two-column timer layout with sticky hero and recent entries sidebar
- Timer font selector with 16 monospace Google Fonts and live preview
- UI font selector with 15+ Google Fonts
- Close-to-tray and minimize-to-tray settings
- New app icons (no-glow variants), platform icon set
- Mini timer pop-out window
- Favorites strip with drag-reorder and inline actions
- Comprehensive README with feature documentation
- Remove tracked files that belong in gitignore

package.json

@@ -18,6 +18,7 @@
     "@vueuse/core": "^12.0.0",
     "@vueuse/motion": "^3.0.3",
     "chart.js": "^4.4.0",
+    "dompurify": "^3.3.1",
     "jspdf": "^2.5.0",
     "lucide-vue-next": "^0.400.0",
     "marked": "^17.0.3",
@@ -30,8 +31,12 @@
   "devDependencies": {
     "@tailwindcss/vite": "^4.0.0",
     "@tauri-apps/cli": "^2.2.0",
+    "@types/dompurify": "^3.0.5",
     "@vitejs/plugin-vue": "^5.2.0",
     "autoprefixer": "^10.4.0",
+    "png-to-ico": "^3.0.1",
+    "puppeteer-core": "^24.37.5",
+    "sharp": "^0.34.5",
     "tailwindcss": "^4.0.0",
     "typescript": "^5.7.0",
     "vite": "^6.0.0",