fix: MBE health check proxy and admin page

- Added /api/v1/mbe/health proxy endpoint
- Frontend uses proxy for MBE health check (works on localhost and external)
- Accepts 'healthy' status from MBE response
- Shows model info (MBE e4b) in Admin UI

node_modules/.vite/deps/_metadata.json

@@ -2,36 +2,42 @@
   "hash": "813ccdf0",
   "configHash": "5b9e4b03",
   "lockfileHash": "ac269d47",
-  "browserHash": "2eabb9c1",
+  "browserHash": "4a92acfe",
   "optimized": {
     "@tauri-apps/api/core": {
       "src": "../../@tauri-apps/api/core.js",
       "file": "@tauri-apps_api_core.js",
-      "fileHash": "3969e853",
+      "fileHash": "9c12c9cd",
       "needsInterop": false
     },
     "vue": {
       "src": "../../vue/dist/vue.runtime.esm-bundler.js",
       "file": "vue.js",
-      "fileHash": "b283492a",
+      "fileHash": "8cfb0722",
       "needsInterop": false
     },
     "vue-router": {
       "src": "../../vue-router/dist/vue-router.mjs",
       "file": "vue-router.js",
-      "fileHash": "0528c0df",
+      "fileHash": "8e70fe49",
       "needsInterop": false
     },
     "vue-i18n": {
       "src": "../../vue-i18n/dist/vue-i18n.mjs",
       "file": "vue-i18n.js",
-      "fileHash": "b2bd439f",
+      "fileHash": "ecd260b8",
       "needsInterop": false
     },
     "@vueuse/core": {
       "src": "../../@vueuse/core/dist/index.js",
       "file": "@vueuse_core.js",
-      "fileHash": "db16229f",
+      "fileHash": "cb3f3d6d",
+      "needsInterop": false
+    },
+    "p-limit": {
+      "src": "../../p-limit/index.js",
+      "file": "p-limit.js",
+      "fileHash": "b4b2941e",
       "needsInterop": false
     }
   },
@@ -41,6 +47,9 @@
     },
     "chunk-5G6OTI3J": {
       "file": "chunk-5G6OTI3J.js"
+    },
+    "chunk-RR3RQRRX": {
+      "file": "chunk-RR3RQRRX.js"
     }
   }
 }