feat(cli): add gemini-auth command and alias support

src/daemon/models.ts

@@ -4,6 +4,7 @@ import type { ModelClient, RetryConfig, ModelTier } from '../models/index.js';
 import { logger } from '../logger.js';
 import { getZaiApiKey } from '../auth/zai.js';
 import { getAnthropicApiKey, getAnthropicAuthToken } from '../auth/anthropic.js';
+import { getGeminiApiKey } from '../auth/gemini.js';
 import { getOpenAIApiKey, loadStoredOpenAIAuth } from '../auth/openai.js';
 
 type AuthMode = 'auto' | 'api_key' | 'oauth';
@@ -223,10 +224,13 @@ export function createClientFromConfig(cfg: ModelConfig): ModelClient {
         authToken: cfg.auth_token,
       });
     case 'gemini':
+    {
+      const apiKey = cfg.api_key ?? getGeminiApiKey() ?? undefined;
       return new GeminiClient({
         model: cfg.model,
-        apiKey: cfg.api_key,
+        apiKey,
       });
+    }
     case 'openrouter':
     {
       const keys = resolveApiKeyPool(cfg, 'OPENROUTER_API_KEY');