feat(desktop): add tray behavior and packaging config

package.json

@@ -2,12 +2,61 @@
   "name": "fabric-desktop",
   "version": "0.1.0",
   "private": true,
+  "description": "Electron desktop shell for Fabric frontend.",
+  "homepage": "https://github.com/hangman0414/Fabric",
+  "author": {
+    "name": "Hangman",
+    "email": "hangman@example.com"
+  },
   "main": "main.js",
   "scripts": {
     "start": "electron .",
-    "start:dev": "FABRIC_DESKTOP_URL=http://localhost:5173 electron ."
+    "start:dev": "FABRIC_DESKTOP_URL=http://localhost:5173 electron .",
+    "pack": "electron-builder --dir",
+    "dist": "electron-builder",
+    "dist:linux": "electron-builder --linux AppImage deb tar.gz",
+    "dist:mac": "electron-builder --mac dmg zip",
+    "dist:win": "electron-builder --win nsis zip"
   },
   "devDependencies": {
-    "electron": "^37.2.1"
+    "electron": "^37.2.1",
+    "electron-builder": "^24.13.3"
+  },
+  "build": {
+    "appId": "ai.hangman.fabric.desktop",
+    "productName": "Fabric Desktop",
+    "artifactName": "Fabric-Desktop-${version}-${os}-${arch}.${ext}",
+    "directories": {
+      "output": "dist"
+    },
+    "files": [
+      "main.js",
+      "preload.js",
+      "offline.html",
+      "package.json"
+    ],
+    "asar": true,
+    "linux": {
+      "target": [
+        "AppImage",
+        "deb",
+        "tar.gz"
+      ],
+      "category": "Utility",
+      "maintainer": "Hangman <hangman@example.com>"
+    },
+    "mac": {
+      "target": [
+        "dmg",
+        "zip"
+      ],
+      "category": "public.app-category.productivity"
+    },
+    "win": {
+      "target": [
+        "nsis",
+        "zip"
+      ]
+    }
   }
 }