feat(status-ui): enhance desktop session controls

Add native directory selection, persisted interface scaling, and navigation back to the latest conversation message.

Restore saved session transcripts when the bridge transcript RPC is unavailable so the desktop client remains useful during bridge compatibility gaps.

ui/package-lock.json

@@ -1,14 +1,16 @@
 {
-  "name": "ui",
+  "name": "pi-status-ui",
   "version": "0.1.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
-      "name": "ui",
+      "name": "pi-status-ui",
       "version": "0.1.0",
+      "license": "Apache-2.0",
       "dependencies": {
         "@tauri-apps/api": "^2",
+        "@tauri-apps/plugin-dialog": "^2.7.2",
         "@tauri-apps/plugin-opener": "^2",
         "react": "^19.1.0",
         "react-dom": "^19.1.0"
@@ -1434,6 +1436,15 @@
         "node": ">= 10"
       }
     },
+    "node_modules/@tauri-apps/plugin-dialog": {
+      "version": "2.7.2",
+      "resolved": "https://registry.npmjs.org/@tauri-apps/plugin-dialog/-/plugin-dialog-2.7.2.tgz",
+      "integrity": "sha512-pX0IGm1I3I6wc+zeKYcq1GSqogK6okCNX5fOdaNU5ab1AjGS6l1E5wFNjEb7meg7ZFSp0JUs+0jQGQNyOvLrsg==",
+      "license": "MIT OR Apache-2.0",
+      "dependencies": {
+        "@tauri-apps/api": "^2.11.0"
+      }
+    },
     "node_modules/@tauri-apps/plugin-opener": {
       "version": "2.5.4",
       "resolved": "https://registry.npmjs.org/@tauri-apps/plugin-opener/-/plugin-opener-2.5.4.tgz",