chore(gui): 版本号 1.8.0 → 1.9.0

per-key AUTO 链（22decf2）与并发判据（c66e1b5）是 v1.8.0 发布后的新特性，
v1.8.0 的 tag 已存在，不能复用。package-lock.json 里剩下的一处 1.8.0 是
@electron/fuses 依赖自身的版本，不应改动。

Co-Authored-By: ModelRouter <noreply@modelrouter.dev>

cmd/gui/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "modelrouter-gui",
-  "version": "1.8.0",
+  "version": "1.9.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "modelrouter-gui",
-      "version": "1.8.0",
+      "version": "1.9.0",
       "license": "Proprietary",
       "devDependencies": {
         "electron": "^33.0.0",

cmd/gui/package.json

@@ -1,6 +1,6 @@
 {
   "name": "modelrouter-gui",
-  "version": "1.8.0",
+  "version": "1.9.0",
   "description": "ModelRouter Desktop — embedded ModelRouter core with tray",
   "author": "ModelRouter",
   "main": "main.js",