Add Zalo channel adapter with webhook and send path

src/config/schema.test.ts

@@ -635,6 +635,31 @@ describe('configSchema — feishu', () => {
   });
 });
 
+describe('configSchema — zalo', () => {
+  const minimalConfig = {
+    telegram: { bot_token: 'test', allowed_chat_ids: [1] },
+    models: { default: { provider: 'anthropic', model: 'claude-3' } },
+  };
+
+  it('accepts zalo config and defaults optional fields', () => {
+    const result = configSchema.parse({
+      ...minimalConfig,
+      zalo: {
+        oa_access_token: 'oa-token',
+      },
+    });
+
+    expect(result.zalo).toBeDefined();
+    if (!result.zalo) {
+      throw new Error('Expected zalo config');
+    }
+    expect(result.zalo.oa_access_token).toBe('oa-token');
+    expect(result.zalo.allowed_user_ids).toEqual([]);
+    expect(result.zalo.require_mention).toBe(true);
+    expect(result.zalo.mention_name).toBe('flynn');
+  });
+});
+
 describe('configSchema — whatsapp', () => {
   const minimalConfig = {
     telegram: { bot_token: 'test', allowed_chat_ids: [1] },