chore(version): 1.7.1 -> 1.8.0

main 的版本号此前停在 1.4.2（v1.6.0 回流时按纪律未带入 bump），
落后于已发布的 v1.7.1。按 SemVer，main 指向下一个未发布的中版本。

cmd/gui/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "modelrouter-gui",
-  "version": "1.4.2",
+  "version": "1.8.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "modelrouter-gui",
-      "version": "1.4.2",
+      "version": "1.8.0",
       "license": "Proprietary",
       "devDependencies": {
         "electron": "^33.0.0",

cmd/gui/package.json

@@ -1,6 +1,6 @@
 {
   "name": "modelrouter-gui",
-  "version": "1.4.2",
+  "version": "1.8.0",
   "description": "ModelRouter Desktop — embedded ModelRouter core with tray",
   "author": "ModelRouter",
   "main": "main.js",