diff --git a/web_engine/src/main/ets/interface/CommonInterface.ts b/web_engine/src/main/ets/interface/CommonInterface.ts
index 7bee166..66893f7 100644
--- a/web_engine/src/main/ets/interface/CommonInterface.ts
+++ b/web_engine/src/main/ets/interface/CommonInterface.ts
@@ -33,6 +33,10 @@ import type GestureEvent from '@ohos.multimodalInput.gestureEvent';
 import type ConfigurationConstant from '@ohos.app.ability.ConfigurationConstant';
 import type common from '@ohos.app.ability.common';
 import type window from '@ohos.window';
+import type batteryInfo from '@ohos.batteryInfo';
+
+// Re-export battery info type
+export type BatteryInfo = batteryInfo.BatteryBasicInfo;
 
 export interface ILoginInfo {
   status: boolean;
@@ -117,6 +121,7 @@ export interface NativeContext {
   ClearWindowEventFilter: (origin_window_id: number) => void;
   OnCaptionButtonRectChange: (id: string, event: CaptionButtonRect) => void;
   UpdateWindowPcmodeSwitchStatusCB: (value: boolean) => void;
+  PowerMonitor: PowerMonitor;
 }
 
 export interface IParams {
@@ -324,8 +329,24 @@ export enum BrowserCloseResponse {
 
 // Electron
 export interface WindowPreferences {
-  hideTitleBar: boolean,
-  minimizable: boolean,
-  maximizable: boolean,
-  closable: boolean,
+  hideTitleBar: boolean;
+  minimizable: boolean;
+  maximizable: boolean;
+  closable: boolean;
+}
+
+export interface OcrAdapterImage {
+  width: number;
+  height: number;
+}
+
+export interface TextWord {
+  word: string;
+  confidence?: number;
+}
+
+export interface PowerMonitor {
+  OnSuspend: () => void;
+  OnResume: () => void;
+  OnPowerStateChanged: () => void;
 }
diff --git a/web_engine/src/main/ets/utils/StringUtil.ts b/web_engine/src/main/ets/utils/StringUtil.ts
index 66229e0..795b52c 100644
--- a/web_engine/src/main/ets/utils/StringUtil.ts
+++ b/web_engine/src/main/ets/utils/StringUtil.ts
@@ -43,4 +43,13 @@ export default class StringUtil {
     });
     return copy;
   }
+
+  static filterFileDocs(uri: string): string {
+    // Remove "docs://" prefix if present and return the actual path
+    if (uri.startsWith('docs://')) {
+      // docs://file_URI/path -> return as-is, FileUri will handle it
+      return uri;
+    }
+    return uri;
+  }
 }