refactor: make telegram config optional for non-telegram setups

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/config/loader.test.ts

@@ -58,8 +58,8 @@ models:
 
     const config = loadConfig(configPath);
 
-    expect(config.telegram.bot_token).toBe('test-token');
-    expect(config.telegram.allowed_chat_ids).toContain(123456789);
+    expect(config.telegram?.bot_token).toBe('test-token');
+    expect(config.telegram?.allowed_chat_ids).toContain(123456789);
     expect(config.server.port).toBe(18800);
     expect(config.models.default.provider).toBe('anthropic');
 
@@ -84,7 +84,7 @@ models:
 
     const config = loadConfig(configPath);
 
-    expect(config.telegram.bot_token).toBe('env-token-value');
+    expect(config.telegram?.bot_token).toBe('env-token-value');
 
     delete process.env.TEST_BOT_TOKEN;
     rmSync(testDir, { recursive: true });
@@ -137,7 +137,7 @@ server:
 
     const config = loadConfig(basePath, overlayPath);
     expect(config.server.port).toBe(9999);
-    expect(config.telegram.bot_token).toBe('base-token');
+    expect(config.telegram?.bot_token).toBe('base-token');
   });
 
   it('loads base-only when no overlay provided', () => {
@@ -157,7 +157,7 @@ models:
 `);
 
     const config = loadConfig(basePath);
-    expect(config.telegram.bot_token).toBe('base-only-token');
+    expect(config.telegram?.bot_token).toBe('base-only-token');
     expect(config.server.port).toBe(18800);
   });
 
@@ -186,7 +186,7 @@ models:
 `);
 
     const config = loadConfig(basePath, overlayPath);
-    expect(config.telegram.bot_token).toBe('expanded-token');
+    expect(config.telegram?.bot_token).toBe('expanded-token');
     expect(config.models.default.model).toBe('gpt-4o');
   });
 

src/config/schema.ts

@@ -349,7 +349,7 @@ const logLevelSchema = z.enum(['debug', 'info', 'warn', 'error', 'silent']).defa
 
 export const configSchema = z.object({
   log_level: logLevelSchema,
-  telegram: telegramSchema,
+  telegram: telegramSchema.optional(),
   discord: discordSchema,
   slack: slackSchema,
   whatsapp: whatsappSchema,