✨ feat(shortcuts): 新增标签页切换快捷键

- 新增切换到下一个标签页动作，默认 Ctrl+Tab
- 新增切换到上一个标签页动作，默认 Ctrl+Shift+Tab
- 接入全局快捷键处理，按当前标签顺序首尾循环切换
- 补充快捷键默认值与全局执行链路测试

Refs #399

frontend/src/App.tool-center.test.ts

@@ -162,6 +162,8 @@ describe('tool center menu entries', () => {
       ['runQuery', 'gonavi:run-active-query'],
       ['focusSidebarSearch', 'gonavi:focus-sidebar-search'],
       ['newQueryTab', 'handleNewQuery();'],
+      ['switchToNextTab', 'switchActiveTabByOffset(1);'],
+      ['switchToPreviousTab', 'switchActiveTabByOffset(-1);'],
       ['newConnection', 'handleCreateConnection();'],
       ['toggleAIPanel', 'toggleAIPanel();'],
       ['toggleLogPanel', 'handleToggleLogPanel();'],
@@ -174,8 +176,11 @@ describe('tool center menu entries', () => {
     for (const [action, handler] of expectedHandlers) {
       expect(getGlobalShortcutCaseBlock(action)).toContain(handler);
     }
+    expect(appSource).toContain('const switchActiveTabByOffset = useCallback((offset: 1 | -1) => {');
+    expect(appSource).toContain('const nextIndex = (baseIndex + offset + tabs.length) % tabs.length;');
+    expect(appSource).toContain('setActiveTab(tabs[nextIndex].id);');
     expect(appSource).toContain('handleCreateConnection, handleManualResetWindowZoom');
-    expect(appSource).toContain('setTheme, toggleAIPanel, useNativeMacWindowControls');
+    expect(appSource).toContain('switchActiveTabByOffset, themeMode');
   });
 
   it('captures global shortcuts before Monaco/editor defaults consume them', () => {

frontend/src/App.tsx

@@ -1141,6 +1141,7 @@ function App() {
   const connections = useStore(state => state.connections);
   const tabs = useStore(state => state.tabs);
   const activeTabId = useStore(state => state.activeTabId);
+  const setActiveTab = useStore(state => state.setActiveTab);
   const openSecurityUpdateSettings = useCallback((focusTarget: SecurityUpdateSettingsFocusTarget | null = null) => {
       setIsSecurityUpdateIntroOpen(false);
       setSecurityUpdateSettingsFocusTarget(focusTarget);
@@ -1893,6 +1894,14 @@ function App() {
       });
   }, [activeTabId, tabs, connections, activeContext, addTab]);
 
+  const switchActiveTabByOffset = useCallback((offset: 1 | -1) => {
+      if (tabs.length < 2) return;
+      const activeIndex = tabs.findIndex(tab => tab.id === activeTabId);
+      const baseIndex = activeIndex >= 0 ? activeIndex : 0;
+      const nextIndex = (baseIndex + offset + tabs.length) % tabs.length;
+      setActiveTab(tabs[nextIndex].id);
+  }, [activeTabId, setActiveTab, tabs]);
+
   const closeConnectionPackageDialog = useCallback(() => {
       setConnectionPackageDialog(createClosedConnectionPackageDialogState());
       setPendingConnectionImportPayload(null);
@@ -2927,6 +2936,12 @@ function App() {
               case 'newQueryTab':
                   handleNewQuery();
                   break;
+              case 'switchToNextTab':
+                  switchActiveTabByOffset(1);
+                  break;
+              case 'switchToPreviousTab':
+                  switchActiveTabByOffset(-1);
+                  break;
               case 'newConnection':
                   handleCreateConnection();
                   break;
@@ -2957,7 +2972,7 @@ function App() {
       return () => {
           window.removeEventListener('keydown', handleGlobalShortcut, true);
       };
-  }, [activeShortcutPlatform, handleCreateConnection, handleManualResetWindowZoom, handleNewQuery, handleTitleBarWindowToggle, handleToggleLogPanel, isMacRuntime, shortcutOptions, themeMode, setTheme, toggleAIPanel, useNativeMacWindowControls]);
+  }, [activeShortcutPlatform, handleCreateConnection, handleManualResetWindowZoom, handleNewQuery, handleTitleBarWindowToggle, handleToggleLogPanel, isMacRuntime, shortcutOptions, switchActiveTabByOffset, themeMode, setTheme, toggleAIPanel, useNativeMacWindowControls]);
 
   useEffect(() => {
       if (!capturingShortcutAction) {

frontend/src/utils/shortcuts.test.ts

@@ -200,6 +200,14 @@ describe('shortcut defaults', () => {
       mac: { combo: 'Meta+N', enabled: true },
       windows: { combo: 'Ctrl+N', enabled: true },
     });
+    expect(DEFAULT_SHORTCUT_OPTIONS.switchToNextTab).toEqual({
+      mac: { combo: 'Ctrl+Tab', enabled: true },
+      windows: { combo: 'Ctrl+Tab', enabled: true },
+    });
+    expect(DEFAULT_SHORTCUT_OPTIONS.switchToPreviousTab).toEqual({
+      mac: { combo: 'Ctrl+Shift+Tab', enabled: true },
+      windows: { combo: 'Ctrl+Shift+Tab', enabled: true },
+    });
     expect(DEFAULT_SHORTCUT_OPTIONS.toggleLogPanel).toEqual({
       mac: { combo: 'Meta+Shift+H', enabled: true },
       windows: { combo: 'Ctrl+H', enabled: true },

frontend/src/utils/shortcuts.ts

@@ -7,6 +7,8 @@ export type ShortcutAction =
   | 'sendAIChatMessage'
   | 'focusSidebarSearch'
   | 'newQueryTab'
+  | 'switchToNextTab'
+  | 'switchToPreviousTab'
   | 'newConnection'
   | 'toggleAIPanel'
   | 'toggleLogPanel'
@@ -92,6 +94,8 @@ export const SHORTCUT_ACTION_ORDER: ShortcutAction[] = [
   'sendAIChatMessage',
   'focusSidebarSearch',
   'newQueryTab',
+  'switchToNextTab',
+  'switchToPreviousTab',
   'newConnection',
   'toggleAIPanel',
   'toggleLogPanel',
@@ -135,6 +139,16 @@ export const SHORTCUT_ACTION_META: Record<ShortcutAction, ShortcutActionMeta> =
     label: '新建查询页',
     description: '创建一个新的 SQL 查询标签页',
   },
+  switchToNextTab: {
+    label: '切换到下一个标签页',
+    description: '在打开的标签页中向右切换',
+    allowInEditable: true,
+  },
+  switchToPreviousTab: {
+    label: '切换到上一个标签页',
+    description: '在打开的标签页中向左切换',
+    allowInEditable: true,
+  },
   newConnection: {
     label: '新建数据源',
     description: '创建新的数据库、运行时或其他数据源连接',
@@ -194,6 +208,14 @@ export const DEFAULT_SHORTCUT_OPTIONS: ShortcutOptions = {
     mac: { combo: 'Meta+N', enabled: true },
     windows: { combo: 'Ctrl+N', enabled: true },
   },
+  switchToNextTab: {
+    mac: { combo: 'Ctrl+Tab', enabled: true },
+    windows: { combo: 'Ctrl+Tab', enabled: true },
+  },
+  switchToPreviousTab: {
+    mac: { combo: 'Ctrl+Shift+Tab', enabled: true },
+    windows: { combo: 'Ctrl+Shift+Tab', enabled: true },
+  },
   newConnection: {
     mac: { combo: 'Meta+Shift+N', enabled: true },
     windows: { combo: 'Ctrl+Shift+N', enabled: true },