Fix electron-builder validation errors

- Move electron from dependencies to devDependencies (required by electron-builder)
- Add author field to package.json (required by electron-builder)

package.json

@@ -2,6 +2,7 @@
   "name": "@opencode-ai/client",
   "version": "0.1.0",
   "description": "OpenCode desktop client - multi-instance, multi-session AI coding interface",
+  "author": "OpenCode Team",
   "type": "module",
   "main": "dist/main/main.js",
   "scripts": {
@@ -27,7 +28,6 @@
     "@kobalte/core": "0.13.11",
     "@opencode-ai/sdk": "0.15.13",
     "@solidjs/router": "^0.13.0",
-    "electron": "38.4.0",
     "ignore": "7.0.5",
     "lucide-solid": "^0.300.0",
     "marked": "^12.0.0",
@@ -36,6 +36,7 @@
   },
   "devDependencies": {
     "autoprefixer": "10.4.21",
+    "electron": "38.4.0",
     "electron-builder": "^24.0.0",
     "electron-vite": "^2.0.0",
     "postcss": "8.5.6",