feat: 品牌替换 + 启动优化 + AGENTS.md 模板定制

- 品牌替换：OpenCode/opencode → AirCoding/aircoding（16+ 文件）
- Logo ASCII art：修复 left/right 行数不匹配导致的启动崩溃
- 启动诊断：添加 OPENCODE_PRINT_TIMING 计时探针
- dev 模式默认 --pure 跳过外部插件加载
- AGENTS.md 模板：追加 AirCoding 多 Agent 专项段落
- architect prompt + plugin：强化 AGENTS.md 产出验证

packages/desktop/src/renderer/i18n/en.ts

@@ -0,0 +1,27 @@
+export const dict = {
+  "desktop.menu.checkForUpdates": "Check for Updates...",
+  "desktop.menu.installCli": "Install CLI...",
+  "desktop.menu.reloadWebview": "Reload Webview",
+  "desktop.menu.restart": "Restart",
+
+  "desktop.dialog.chooseFolder": "Choose a folder",
+  "desktop.dialog.chooseFile": "Choose a file",
+  "desktop.dialog.saveFile": "Save file",
+
+  "desktop.updater.checkFailed.title": "Update Check Failed",
+  "desktop.updater.checkFailed.message": "Failed to check for updates",
+  "desktop.updater.none.title": "No Update Available",
+  "desktop.updater.none.message": "You are already using the latest version of OpenCode",
+  "desktop.updater.downloadFailed.title": "Update Failed",
+  "desktop.updater.downloadFailed.message": "Failed to download update",
+  "desktop.updater.downloaded.title": "Update Downloaded",
+  "desktop.updater.downloaded.prompt":
+    "Version {{version}} of OpenCode has been downloaded, would you like to install it and relaunch?",
+  "desktop.updater.installFailed.title": "Update Failed",
+  "desktop.updater.installFailed.message": "Failed to install update",
+
+  "desktop.cli.installed.title": "CLI Installed",
+  "desktop.cli.installed.message": "CLI installed to {{path}}\n\nRestart your terminal to use the 'opencode' command.",
+  "desktop.cli.failed.title": "Installation Failed",
+  "desktop.cli.failed.message": "Failed to install CLI: {{error}}",
+}