v2.0.0: 主题系统+SSH私钥解析修复+会话持久化+连接池优化+UI打磨

核心修复:
- ssh-service.ts: 新增 resolvePrivateKey()，将私钥文件路径(~/.ssh/id_rsa)解析为内容后传给 ssh2，
  解决 'Cannot parse privateKey: Unsupported key format' 错误
- useTerminalConnection.ts + sessionHelper.ts: 根据 authType 过滤字段，password/agent 认证不再传 privateKey
- sessionStore.ts: addSession() 现在先调用 sessionCreate() 持久化到 SQLite，解决恢复标签'无可用连接信息'问题
- database-service.ts: updateSession() 补充 private_key_path 字段持久化
- SessionDialog.tsx: 默认 username='root'、privateKey='~/.ssh/id_rsa'

UI/UX:
- 语义化主题系统(app-theme.ts)，强制深色模式，全局无边框设计
- macOS 标题栏支持双击最大化(window:toggleMaximize IPC)
- macOS 菜单栏('OpsXShell' 应用菜单 + Settings Cmd+,)
- WelcomeView 4卡片布局，移除 Settings 按钮
- TabBar/TabItem 背景色统一(bg-dark-800/900)，消除白色边框线

架构优化:
- SFTP 生命周期修复(useSFTP.ts useRef + autoConnectAttempted guard)
- 连接池竞态修复，支持快速多标签连接
- IPC 接口规范化，安全错误处理
- Vite 代码分割优化

质量: lint零错误 | tsc零错误 | build成功 | 49 tests pass

package.json

@@ -1,36 +1,50 @@
 {
   "name": "opsxshell-gui",
-  "version": "1.0.0",
-  "description": "跨平台 SSH/SFTP 终端工具 · 简洁高效 · 安全可靠",
+  "version": "2.0.0",
+  "description": "跨平台 SSH/SFTP 终端工具 · 简洁高效 · 安全可靠 · v2.0 安全增强版",
   "main": "dist-electron/main.js",
   "author": "OpsXShell Team",
   "license": "MIT",
   "scripts": {
-    "dev": "vite & sleep 2 && electron dist-electron/main.js --inspect=9222",
-    "build": "tsc && vite build && npm run build:electron",
+    "dev": "concurrently \"vite\" \"wait-on http://localhost:5173 && electron dist-electron/main.js --inspect=9222\"",
+    "build": "tsc --noEmit && vite build && npm run build:electron",
     "build:electron": "tsc -p electron/tsconfig.json",
     "preview": "vite preview",
     "lint": "eslint . --ext ts,tsx --report-unused-disable-directives --max-warnings 0",
+    "lint:fix": "eslint . --ext ts,tsx --fix",
+    "format": "prettier --write \"**/*.{ts,tsx,css,json,md}\"",
+    "format:check": "prettier --check \"**/*.{ts,tsx,css,json,md}\"",
+    "typecheck": "tsc --noEmit && tsc --noEmit -p electron/tsconfig.json",
     "test": "vitest run",
     "test:watch": "vitest",
     "test:coverage": "vitest run --coverage",
+    "clean": "rimraf dist dist-electron release",
+    "prepare": "husky install || true",
     "dist": "npm run build && electron-builder",
     "dist:win": "npm run build && electron-builder --win",
     "dist:mac": "npm run build && electron-builder --mac",
     "dist:linux": "npm run build && electron-builder --linux"
   },
   "dependencies": {
+    "@vitest/coverage-v8": "^4.1.4",
     "@xterm/addon-fit": "^0.10.0",
     "@xterm/addon-search": "^0.16.0",
     "@xterm/xterm": "^5.5.0",
+    "concurrently": "^9.2.1",
+    "husky": "^9.1.7",
+    "lint-staged": "^16.4.0",
     "lucide-react": "^0.294.0",
+    "prettier": "^3.8.3",
+    "prettier-plugin-tailwindcss": "^0.7.2",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-router-dom": "^6.21.0",
+    "rimraf": "^6.1.3",
     "socksv5": "^0.0.6",
     "sql.js": "^1.11.0",
     "ssh2": "^1.15.0",
     "uuid": "^9.0.1",
+    "wait-on": "^9.0.5",
     "zmodem-ts": "^1.0.8",
     "zustand": "^4.4.7"
   },