chore(gui): 版本号 2.0.43（与内核同版本；桌面插件刷新判据按 app 版本，必须同步）

桌面壳的「内置插件升级刷新」按 app.getVersion() 打戳：GUI 版本号若与内核脱节，
升级后 channels.lua 不会重新播种，渠道修复又会被静默留在旧版。

(cherry picked from commit 055705c134)

cmd/gui/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "modelrouter-gui",
-  "version": "2.0.42",
+  "version": "2.0.43",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "modelrouter-gui",
-      "version": "2.0.42",
+      "version": "2.0.43",
       "license": "Proprietary",
       "devDependencies": {
         "electron": "^33.0.0",

cmd/gui/package.json

@@ -1,6 +1,6 @@
 {
   "name": "modelrouter-gui",
-  "version": "2.0.42",
+  "version": "2.0.43",
   "description": "ModelRouter Desktop — embedded ModelRouter core with tray",
   "author": "ModelRouter",
   "main": "main.js",
@@ -90,4 +90,4 @@
     "asar": true
   },
   "homepage": "https://gitcode.com/JianFeeeee/ModelRouter"
-}
+}