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>

pkg/api/http/service/user.py

@@ -82,3 +82,18 @@ class UserService:
         await self.ap.persistence_mgr.execute_async(
             sqlalchemy.update(user.User).where(user.User.user == user_email).values(password=hashed_password)
         )
+
+    async def change_password(self, user_email: str, current_password: str, new_password: str) -> None:
+        ph = argon2.PasswordHasher()
+        
+        user_obj = await self.get_user_by_email(user_email)
+        if user_obj is None:
+            raise ValueError('User not found')
+        
+        ph.verify(user_obj.password, current_password)
+        
+        hashed_password = ph.hash(new_password)
+        
+        await self.ap.persistence_mgr.execute_async(
+            sqlalchemy.update(user.User).where(user.User.user == user_email).values(password=hashed_password)
+        )