feat: restructure repo for collaboration + add desktop app source

- Reorganize project: clean structure (portable/ u-claw-app/ usb-scripts/ website/)
- Move docs into website/, rename uclaw-scripts to usb-scripts
- Add u-claw-app/ Electron desktop source code
- Add portable/setup.sh: one-command dev environment setup
- Add portable/SkillHub.html: skill marketplace page
- Update README: dev guide, contribution workflow, project structure
- Update .gitignore: exclude runtime binaries and build artifacts
- Expand China install guide: npm mirrors, detailed onboard wizard

u-claw-app/package.json

@@ -0,0 +1,109 @@
+{
+  "name": "u-claw",
+  "version": "2.0.0",
+  "description": "U-Claw - AI Assistant Desktop App",
+  "main": "src/main.js",
+  "author": "dongsheng <hefangsheng@gmail.com>",
+  "license": "MIT",
+  "homepage": "https://u-claw.org",
+  "scripts": {
+    "start": "electron .",
+    "dev": "electron . --dev",
+    "build:mac": "electron-builder --mac",
+    "build:mac-arm64": "electron-builder --mac --arm64",
+    "build:mac-x64": "electron-builder --mac --x64",
+    "build:win": "electron-builder --win",
+    "build:all": "electron-builder --mac --win",
+    "postinstall": "electron-builder install-app-deps"
+  },
+  "build": {
+    "appId": "org.u-claw.desktop",
+    "productName": "U-Claw",
+    "copyright": "Copyright © 2026 U-Claw",
+    "directories": {
+      "output": "release"
+    },
+    "files": [
+      "src/**/*",
+      "assets/**/*",
+      "node_modules/**/*",
+      "!node_modules/**/*.md",
+      "!node_modules/**/CHANGELOG*",
+      "!node_modules/**/test/**",
+      "!node_modules/**/tests/**",
+      "!node_modules/**/.cache"
+    ],
+    "asar": false,
+    "extraResources": [
+      {
+        "from": "resources/Config.html",
+        "to": "resources/Config.html"
+      },
+      {
+        "from": "resources/context",
+        "to": "resources/context"
+      },
+      {
+        "from": "resources/runtime/node-${platform}-${arch}",
+        "to": "resources/runtime/node-${platform}-${arch}"
+      }
+    ],
+    "mac": {
+      "category": "public.app-category.developer-tools",
+      "icon": "assets/icon.icns",
+      "identity": null,
+      "target": [
+        {
+          "target": "dmg",
+          "arch": ["arm64", "x64"]
+        }
+      ],
+      "hardenedRuntime": false,
+      "gatekeeperAssess": false
+    },
+    "dmg": {
+      "title": "U-Claw",
+      "icon": "assets/icon.icns",
+      "contents": [
+        { "x": 130, "y": 220 },
+        { "x": 410, "y": 220, "type": "link", "path": "/Applications" }
+      ]
+    },
+    "win": {
+      "target": [
+        {
+          "target": "nsis",
+          "arch": ["x64"]
+        },
+        {
+          "target": "portable",
+          "arch": ["x64"]
+        }
+      ],
+      "icon": "assets/icon.ico"
+    },
+    "nsis": {
+      "oneClick": true,
+      "perMachine": false,
+      "allowToChangeInstallationDirectory": false,
+      "installerIcon": "assets/icon.ico",
+      "uninstallerIcon": "assets/icon.ico",
+      "installerHeaderIcon": "assets/icon.ico",
+      "createDesktopShortcut": true,
+      "createStartMenuShortcut": true,
+      "shortcutName": "U-Claw"
+    },
+    "linux": {
+      "target": ["AppImage"],
+      "icon": "assets/icon.png",
+      "category": "Development"
+    }
+  },
+  "dependencies": {
+    "openclaw": "latest"
+  },
+  "devDependencies": {
+    "electron": "^35.0.0",
+    "electron-builder": "^26.0.0"
+  }
+}