chore: 升级项目版本至2.2.0

- 更新主包版本号从2.1.0到2.2.0
- 更新桌面应用包版本号从2.1.0到2.2.0
- 更新浏览器扩展包版本号从2.1.0到2.2.0

package.json

@@ -1,6 +1,6 @@
 {
   "name": "prompt-optimizer",
-  "version": "2.1.0",
+  "version": "2.2.0",
   "private": true,
   "packageManager": "pnpm@10.6.1",
   "engines": {

packages/desktop/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@prompt-optimizer/desktop",
-  "version": "2.1.0",
+  "version": "2.2.0",
   "description": "Desktop application for Prompt Optimizer",
   "main": "main.js",
   "repository": {

packages/extension/public/manifest.json

@@ -2,7 +2,7 @@
   "manifest_version": 3,
   "default_locale": "zh_CN",
   "name": "__MSG_extName__",
-  "version": "2.1.0",
+  "version": "2.2.0",
   "description": "__MSG_extDesc__",
   "icons": {
     "16": "icons/icon16.png",