feat(tui): implement live model fetching and enhance model selection menus

src/interfaces/tui/run.ts

@@ -165,5 +165,16 @@ export async function runTui(): Promise<void> {
     sessionId: state.sessionId,
   } as Record<string, unknown>;
 
+  // Prime the /models list in the background so /model shows live models
+  // instead of a hardcoded catalog; the menu falls back until it lands.
+  if (runtime.listModels) {
+    void runtime.listModels().then((models) => {
+      if (models.length > 0) {
+        state.misc.availableModels = models;
+        state.dirty = true;
+      }
+    });
+  }
+
   await bootTui(state);
 }