🐛 fix(oceanbase): 修复 OceanBase 协议模式识别与缓存隔离

- 支持 MySQL/Oracle 租户协议在前后端统一解析
- 拒绝 Native 协议并避免误回退为 MySQL
- 修复 Oracle 模式下元数据、DDL、SQL 方言识别
- 修复连接缓存键与实际协议解析优先级不一致问题
- 补充前后端协议解析与缓存隔离回归测试

frontend/src/components/TriggerViewer.tsx

@@ -5,6 +5,7 @@ import { TabData } from '../types';
 import { useStore } from '../store';
 import { DBQuery } from '../../wailsjs/go/app/App';
 import { buildRpcConnectionConfig } from '../utils/connectionRpcConfig';
+import { normalizeOceanBaseProtocol } from '../utils/oceanBaseProtocol';
 
 interface TriggerViewerProps {
     tab: TabData;
@@ -29,11 +30,11 @@ const TriggerViewer: React.FC<TriggerViewerProps> = ({ tab }) => {
         if (type === 'custom') {
             const driver = String(conn?.config?.driver || '').trim().toLowerCase();
             if (driver === 'diros' || driver === 'doris') return 'mysql';
-            if (driver === 'oceanbase') return 'mysql';
+            if (driver === 'oceanbase') return normalizeOceanBaseProtocol(conn?.config?.oceanBaseProtocol) === 'oracle' ? 'oracle' : 'mysql';
             if (driver === 'opengauss' || driver === 'open_gauss' || driver === 'open-gauss') return 'opengauss';
             return driver;
         }
-        if (type === 'oceanbase' && String(conn?.config?.oceanBaseProtocol || '').trim().toLowerCase() === 'oracle') return 'oracle';
+        if (type === 'oceanbase' && normalizeOceanBaseProtocol(conn?.config?.oceanBaseProtocol) === 'oracle') return 'oracle';
         if (type === 'mariadb' || type === 'oceanbase' || type === 'diros' || type === 'sphinx') return 'mysql';
         if (type === 'dameng') return 'dm';
         return type;