feat: wire up localProviders config to TUI

Add LlamaCppClient to imports and handle llamacpp provider in createModelRouter.
Pass localProviders and currentLocalProvider configuration to MinimalTui to enable
the /backend command to access alternate provider configs.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/tui.ts

@@ -1,6 +1,6 @@
 import { loadConfig } from './config/index.js';
 import { SessionStore, SessionManager } from './session/index.js';
-import { AnthropicClient, OpenAIClient, OllamaClient, ModelRouter } from './models/index.js';
+import { AnthropicClient, OpenAIClient, OllamaClient, LlamaCppClient, ModelRouter } from './models/index.js';
 import { MinimalTui, startFullscreenTui } from './frontends/tui/index.js';
 import type { Config } from './config/index.js';
 import { resolve } from 'path';
@@ -49,6 +49,11 @@ function createModelRouter(config: Config): ModelRouter {
         model: models.local.model,
         host: models.local.endpoint,
       });
+    } else if (models.local.provider === 'llamacpp') {
+      localClient = new LlamaCppClient({
+        endpoint: models.local.endpoint ?? 'http://localhost:8080',
+        authToken: models.local.auth_token,
+      });
     }
   }
 
@@ -124,6 +129,8 @@ async function main() {
       modelClient: modelRouter,
       modelRouter,
       systemPrompt: SYSTEM_PROMPT,
+      localProviders: config.models.local_providers,
+      currentLocalProvider: config.models.local?.provider,
       onTransfer: (target) => {
         if (target === 'telegram') {
           const telegramUserId = String(config.telegram.allowed_chat_ids[0]);