feat(tui): hint at /login and /connect when /model has no models

Replace the bare "No models configured." error with a notice that
points users to /login for Kimi and /connect for other providers.

Author: 7Sageer

.changeset/model-picker-empty-hint.md

@@ -0,0 +1,5 @@
+---
+"@moonshot-ai/kimi-code": patch
+---
+
+Show a hint pointing to /login (Kimi) and /connect (other providers) when /model is opened with no configured models.

apps/kimi-code/src/tui/kimi-tui.ts

@@ -4334,7 +4334,10 @@ export class KimiTUI {
   private showModelPicker(selectedValue: string = this.state.appState.model): void {
     const entries = Object.entries(this.state.appState.availableModels);
     if (entries.length === 0) {
-      this.showError('No models configured.');
+      this.showNotice(
+        'No models configured',
+        'Run /login to sign in to Kimi, or /connect to add another provider from a model catalog.',
+      );
       return;
     }
     this.mountEditorReplacement(