Add GIF export feature to video editor

Implements GIF export alongside MP4, including new export types, a GIF exporter module, UI components for format selection and GIF options, and integration into the export dialog and video editor. Adds property-based and unit tests for GIF export correctness, updates dependencies to include gif.js and related types, and refines Electron save dialog to support GIF files.

package.json

@@ -10,7 +10,9 @@
     "preview": "vite preview",
     "build:mac": "tsc && vite build && electron-builder --mac",
     "build:win": "tsc && vite build && electron-builder --win",
-    "build:linux": "tsc && vite build && electron-builder --linux"
+    "build:linux": "tsc && vite build && electron-builder --linux",
+    "test": "vitest --run",
+    "test:watch": "vitest"
   },
   "dependencies": {
     "@fix-webm-duration/fix": "^1.0.1",
@@ -25,6 +27,7 @@
     "@radix-ui/react-tabs": "^1.1.13",
     "@radix-ui/react-toggle": "^1.1.10",
     "@radix-ui/react-toggle-group": "^1.1.11",
+    "@types/gif.js": "^0.2.5",
     "@uiw/color-convert": "^2.9.2",
     "@uiw/react-color-block": "^2.9.2",
     "class-variance-authority": "^0.7.1",
@@ -32,6 +35,7 @@
     "dnd-timeline": "^2.2.0",
     "emoji-picker-react": "^4.16.1",
     "fix-webm-duration": "^1.0.6",
+    "gif.js": "^0.2.0",
     "gsap": "^3.13.0",
     "lucide-react": "^0.545.0",
     "mediabunny": "^1.25.1",
@@ -49,6 +53,7 @@
     "uuid": "^13.0.0"
   },
   "devDependencies": {
+    "@types/node": "^25.0.3",
     "@types/react": "^18.2.64",
     "@types/react-dom": "^18.2.21",
     "@types/uuid": "^10.0.0",
@@ -56,20 +61,22 @@
     "@typescript-eslint/parser": "^7.1.1",
     "@vitejs/plugin-react": "^4.2.1",
     "autoprefixer": "^10.4.21",
-    "electron": "^30.0.1",
+    "electron": "^39.2.7",
     "electron-builder": "^24.13.3",
     "electron-icon-builder": "^2.0.1",
     "electron-rebuild": "^3.2.9",
     "eslint": "^8.57.0",
     "eslint-plugin-react-hooks": "^4.6.0",
     "eslint-plugin-react-refresh": "^0.4.5",
+    "fast-check": "^4.5.2",
     "postcss": "^8.5.6",
     "tailwindcss": "^3.4.18",
     "terser": "^5.44.1",
     "typescript": "^5.2.2",
     "vite": "^5.1.6",
     "vite-plugin-electron": "^0.28.6",
-    "vite-plugin-electron-renderer": "^0.14.5"
+    "vite-plugin-electron-renderer": "^0.14.5",
+    "vitest": "^4.0.16"
   },
   "main": "dist-electron/main.js"
 }