feat: add password change functionality

- Add password change button to sidebar account menu
- Create PasswordChangeDialog component with shadcn UI components
- Implement backend API endpoint /api/v1/user/change-password
- Add form validation with current password verification
- Include internationalization support for Chinese and English
- Add proper error handling and success notifications

Co-Authored-By: Rock <rockchinq@gmail.com>

web/src/app/infra/http/HttpClient.ts

@@ -622,6 +622,16 @@ class HttpClient {
       new_password: newPassword,
     });
   }
+
+  public changePassword(
+    currentPassword: string,
+    newPassword: string,
+  ): Promise<{ user: string }> {
+    return this.post('/api/v1/user/change-password', {
+      current_password: currentPassword,
+      new_password: newPassword,
+    });
+  }
 }
 
 const getBaseURL = (): string => {