feat(app): load xterm search addon + surface→addon registry

app/package-lock.json

@@ -12,6 +12,7 @@
         "@fontsource/inter": "^5.2.8",
         "@tauri-apps/api": "^2",
         "@tauri-apps/plugin-notification": "^2",
+        "@xterm/addon-search": "^0.16.0",
         "@xterm/addon-webgl": "^0.18.0",
         "@xterm/xterm": "^5.5.0",
         "lucide-react": "^1.17.0",
@@ -1462,6 +1463,12 @@
         "vite": "^4.2.0 || ^5.0.0 || ^6.0.0 || ^7.0.0"
       }
     },
+    "node_modules/@xterm/addon-search": {
+      "version": "0.16.0",
+      "resolved": "https://registry.npmjs.org/@xterm/addon-search/-/addon-search-0.16.0.tgz",
+      "integrity": "sha512-9OeuBFu0/uZJPu+9AHKY6g/w0Czyb/Ut0A5t79I4ULoU4IfU5BEpPFVGQxP4zTTMdfZEYkVIRYbHBX1xWwjeSA==",
+      "license": "MIT"
+    },
     "node_modules/@xterm/addon-webgl": {
       "version": "0.18.0",
       "resolved": "https://registry.npmjs.org/@xterm/addon-webgl/-/addon-webgl-0.18.0.tgz",