feat: add settings dialog with render mode selection

- Add SettingDialogManager with radio-style render mode picker (simple/balance/advanced)
- Add getRenderMode/setRenderMode API to Engine and EngineManager layers
- Wire setting toolbar button to toggle the settings dialog
- Add i18n keys for settings dialog (zh-CN/en-US)
- Add version display at bottom-right of engine wrapper
- Bump version to 1.1.7, rebuild and sync demo libs

src/locales/en-US.ts

@@ -209,5 +209,14 @@ export const enUS: TranslationDictionary = {
         other: 'Other',
         otherPlaceholder: 'Enter custom answer',
         submit: 'Submit'
+    },
+    setting: {
+        dialogTitle: 'Settings',
+        renderMode: 'Render Mode',
+        modes: {
+            simple: 'Performance',
+            balance: 'Balanced',
+            advanced: 'Quality',
+        }
     }
 };

src/locales/types.ts

@@ -231,6 +231,15 @@ export interface TranslationDictionary {
         otherPlaceholder: string;
         submit: string;
     };
+    setting: {
+        dialogTitle: string;
+        renderMode: string;
+        modes: {
+            simple: string;
+            balance: string;
+            advanced: string;
+        };
+    };
 }
 
 /**

src/locales/zh-CN.ts

@@ -209,5 +209,14 @@ export const zhCN: TranslationDictionary = {
         other: '其他',
         otherPlaceholder: '请输入自定义答案',
         submit: '提交'
+    },
+    setting: {
+        dialogTitle: '设置',
+        renderMode: '渲染模式',
+        modes: {
+            simple: '性能模式',
+            balance: '平衡模式',
+            advanced: '效果模式',
+        }
     }
 };