🐛 fix(sql-editor): 修复表名悬停元数据重复展示

- 去除 Cmd/Ctrl 导航高亮 decoration 上的 hoverMessage

- 统一由 SQL hover provider 输出对象元数据

- 补充回归断言，确保表元数据只展示一次

frontend/src/components/QueryEditor.external-sql-save.test.tsx

@@ -777,8 +777,15 @@ describe('QueryEditor external SQL save', () => {
     expect(editorState.domNode.style.cursor).toBe('pointer');
     const lastDecorationCall = editorState.editor.deltaDecorations.mock.calls.at(-1);
     expect(lastDecorationCall?.[1]?.[0]?.options?.inlineClassName).toBe('gonavi-query-editor-link-hint');
-    expect(lastDecorationCall?.[1]?.[0]?.options?.hoverMessage?.value).toMatch(/(?:Ctrl|⌘) \+ 点击打开该表/);
-    expect(lastDecorationCall?.[1]?.[0]?.options?.hoverMessage?.value).toContain('**表** `events`');
+    expect(lastDecorationCall?.[1]?.[0]?.options?.hoverMessage).toBeUndefined();
+
+    const hover = editorState.hoverProviders[0]?.provideHover(
+      editorState.editor.getModel(),
+      { lineNumber: 1, column: 27 },
+    );
+    const hoverText = String(hover?.contents?.[0]?.value || '');
+    expect(hoverText.match(/\*\*表\*\*/g)).toHaveLength(1);
+    expect(hoverText).toContain('**表** `events`');
 
     await act(async () => {
       editorState.mouseLeaveListeners[0]?.();