✨ feat(data-grid): 无主键表支持全列匹配编辑并移除只读限制

- 新增 all-columns 全列匹配行定位策略，无主键/唯一索引时不再强制只读
- 元数据加载失败、索引查询失败等误报场景全部降级为全列匹配编辑
- 修复 resolveQueryLocatorPlan 同步解析异常导致 SQL 结果页签不出现的问题
- 行安全由后端影响行数校验兜底，非单行命中即回滚整个事务
- 同步更新六语言文案与相关测试用例

frontend/src/components/DataViewer.primary-key.test.tsx

@@ -35,6 +35,7 @@ const backendApp = vi.hoisted(() => ({
 const messageApi = vi.hoisted(() => ({
   error: vi.fn(),
   warning: vi.fn(),
+  info: vi.fn(),
 }));
 
 const dataGridState = vi.hoisted(() => ({
@@ -642,7 +643,7 @@ describe('DataViewer safe editing locator', () => {
     renderer.unmount();
   });
 
-  it('keeps non-Oracle table preview read-only when no safe locator exists', async () => {
+  it('falls back to all-columns editing when no safe locator exists', async () => {
     storeState.languagePreference = 'en-US';
     storeState.connections[0].config.type = 'mysql';
     storeState.connections[0].config.database = 'main';
@@ -655,12 +656,13 @@ describe('DataViewer safe editing locator', () => {
 
     expect(dataGridState.latestProps?.pkColumns).toEqual([]);
     expect(dataGridState.latestProps?.editLocator).toMatchObject({
-      strategy: 'none',
-      readOnly: true,
-      reason: 'No primary key or usable unique index was found, so changes cannot be submitted safely.',
+      strategy: 'all-columns',
+      columns: ['ID', 'NAME'],
+      readOnly: false,
+      reason: 'No primary key or unique index was detected, so rows will be located by matching all columns. Edit with care.',
     });
-    expect(dataGridState.latestProps?.readOnly).toBe(true);
-    expect(messageApi.warning).toHaveBeenCalledWith('Table main.users remains read-only: No primary key or usable unique index was found, so changes cannot be submitted safely.');
+    expect(dataGridState.latestProps?.readOnly).toBe(false);
+    expect(messageApi.info).toHaveBeenCalledWith('No primary key or unique index was detected, so rows will be located by matching all columns. Edit with care.');
     renderer.unmount();
   });
 });