Added frontend. Working on user management

src/file-processor/app/config/settings.py

@@ -0,0 +1,85 @@
+"""
+Application configuration settings.
+
+This module handles environment variables and application configuration
+using simple os.getenv() approach without external validation libraries.
+"""
+
+import os
+from typing import Optional
+
+
+def get_mongodb_url() -> str:
+  """
+  Get MongoDB connection URL from environment variables.
+
+  Returns:
+      str: MongoDB connection URL
+
+  Returns default localhost URL if MONGODB_URL not set.
+  """
+  return os.getenv("MONGODB_URL", "mongodb://localhost:27017")
+
+
+def get_mongodb_database_name() -> str:
+  """
+  Get MongoDB database name from environment variables.
+
+  Returns:
+      str: MongoDB database name
+  """
+  return os.getenv("MONGODB_DATABASE", "mydocmanager")
+
+
+def get_jwt_secret_key() -> str:
+  """
+  Get JWT secret key from environment variables.
+
+  Returns:
+      str: JWT secret key
+
+  Raises:
+      ValueError: If JWT_SECRET is not set in production
+  """
+  secret = os.getenv("JWT_SECRET")
+  if not secret:
+    # For development, provide a default key with warning
+    if os.getenv("ENVIRONMENT", "development") == "development":
+      print("WARNING: Using default JWT secret key for development")
+      return "dev-secret-key-change-in-production"
+    else:
+      raise ValueError("JWT_SECRET environment variable must be set in production")
+  return secret
+
+
+def get_jwt_algorithm() -> str:
+  """
+  Get JWT algorithm from environment variables.
+
+  Returns:
+      str: JWT algorithm (default: HS256)
+  """
+  return os.getenv("JWT_ALGORITHM", "HS256")
+
+
+def get_jwt_expire_hours() -> int:
+  """
+  Get JWT token expiration time in hours from environment variables.
+
+  Returns:
+      int: JWT expiration time in hours (default: 24)
+  """
+  try:
+    return int(os.getenv("JWT_EXPIRE_HOURS", "24"))
+  except ValueError:
+    return 24
+
+
+def is_development_environment() -> bool:
+  """
+  Check if running in development environment.
+
+  Returns:
+      bool: True if development environment
+  """
+  return os.getenv("ENVIRONMENT", "development").lower() == "development"

src/file-processor/app/database/connection.py

@@ -0,0 +1,125 @@
+"""
+MongoDB database connection management.
+
+This module handles MongoDB connection with fail-fast approach.
+The application will terminate if MongoDB is not accessible at startup.
+"""
+
+import sys
+from typing import Optional
+from pymongo import MongoClient
+from pymongo.database import Database
+from pymongo.errors import ConnectionFailure, ServerSelectionTimeoutError
+
+from ..config.settings import get_mongodb_url, get_mongodb_database_name
+
+# Global variables for singleton pattern
+_client: Optional[MongoClient] = None
+_database: Optional[Database] = None
+
+
+def create_mongodb_client() -> MongoClient:
+  """
+  Create MongoDB client with connection validation.
+
+  Returns:
+      MongoClient: Connected MongoDB client
+
+  Raises:
+      SystemExit: If connection fails (fail-fast approach)
+  """
+  mongodb_url = get_mongodb_url()
+  
+  try:
+    # Create client with short timeout for fail-fast behavior
+    client = MongoClient(
+      mongodb_url,
+      serverSelectionTimeoutMS=5000,  # 5 seconds timeout
+      connectTimeoutMS=5000,
+      socketTimeoutMS=5000
+    )
+    
+    # Test connection by running admin command
+    client.admin.command('ping')
+    
+    print(f"Successfully connected to MongoDB at {mongodb_url}")
+    return client
+  
+  except (ConnectionFailure, ServerSelectionTimeoutError) as e:
+    print(f"ERROR: Failed to connect to MongoDB at {mongodb_url}")
+    print(f"Connection error: {str(e)}")
+    print("MongoDB is required for this application. Please ensure MongoDB is running and accessible.")
+    sys.exit(1)
+  except Exception as e:
+    print(f"ERROR: Unexpected error connecting to MongoDB: {str(e)}")
+    sys.exit(1)
+
+
+def get_database() -> Database:
+  """
+  Get MongoDB database instance (singleton pattern).
+
+  Returns:
+      Database: MongoDB database instance
+
+  This function implements singleton pattern to ensure only one
+  database connection is created throughout the application lifecycle.
+  """
+  global _client, _database
+  
+  if _database is None:
+    if _client is None:
+      _client = create_mongodb_client()
+    
+    database_name = get_mongodb_database_name()
+    _database = _client[database_name]
+    print(f"Connected to database: {database_name}")
+  
+  return _database
+
+
+def close_database_connection():
+  """
+  Close MongoDB database connection.
+
+  This function should be called during application shutdown
+  to properly close the database connection.
+  """
+  global _client, _database
+  
+  if _client is not None:
+    _client.close()
+    _client = None
+    _database = None
+    print("MongoDB connection closed")
+
+
+def get_mongodb_client() -> Optional[MongoClient]:
+  """
+  Get the raw MongoDB client instance.
+
+  Returns:
+      MongoClient or None: MongoDB client instance if connected
+
+  This is primarily for testing purposes or advanced use cases
+  where direct client access is needed.
+  """
+  return _client
+
+
+def test_database_connection() -> bool:
+  """
+  Test if database connection is working.
+
+  Returns:
+      bool: True if connection is working, False otherwise
+
+  This function can be used for health checks.
+  """
+  try:
+    db = get_database()
+    # Simple operation to test connection
+    db.command('ping')
+    return True
+  except Exception:
+    return False

src/file-processor/app/database/repositories/user_repository.py

@@ -0,0 +1,221 @@
+"""
+User repository for MongoDB operations.
+
+This module implements the repository pattern for user CRUD operations
+with dependency injection of the database connection.
+"""
+
+from typing import Optional, List, Dict, Any
+from datetime import datetime
+from bson import ObjectId
+from pymongo.database import Database
+from pymongo.errors import DuplicateKeyError
+from pymongo.collection import Collection
+
+from app.models.user import UserCreate, UserInDB, UserUpdate
+
+
+class UserRepository:
+  """
+  Repository class for user CRUD operations in MongoDB.
+
+  This class handles all database operations related to users,
+  following the repository pattern with dependency injection.
+  """
+  
+  def __init__(self, database: Database):
+    """
+    Initialize repository with database dependency.
+
+    Args:
+        database (Database): MongoDB database instance
+    """
+    self.db = database
+    self.collection: Collection = database.users
+    
+    # Create unique index on username for duplicate prevention
+    self._ensure_indexes()
+  
+  def _ensure_indexes(self):
+    """
+    Ensure required database indexes exist.
+
+    Creates unique index on username field to prevent duplicates.
+    """
+    try:
+      self.collection.create_index("username", unique=True)
+    except Exception:
+      # Index might already exist, ignore error
+      pass
+  
+  def create_user(self, user_data: UserCreate) -> UserInDB:
+    """
+    Create a new user in the database.
+
+    Args:
+        user_data (UserCreate): User creation data
+
+    Returns:
+        UserInDB: Created user with database ID
+
+    Raises:
+        DuplicateKeyError: If username already exists
+    """
+    user_dict = {
+        "username": user_data.username,
+        "email": user_data.email,
+        "hashed_password": user_data.hashed_password,
+        "role": user_data.role,
+        "is_active": user_data.is_active,
+        "created_at": datetime.utcnow(),
+        "updated_at": datetime.utcnow()
+    }
+    
+    try:
+      result = self.collection.insert_one(user_dict)
+      user_dict["_id"] = result.inserted_id
+      return UserInDB(**user_dict)
+    except DuplicateKeyError:
+      raise DuplicateKeyError(f"User with username '{user_data.username}' already exists")
+  
+  def find_user_by_username(self, username: str) -> Optional[UserInDB]:
+    """
+    Find user by username.
+
+    Args:
+        username (str): Username to search for
+
+    Returns:
+        UserInDB or None: User if found, None otherwise
+    """
+    user_doc = self.collection.find_one({"username": username})
+    if user_doc:
+      return UserInDB(**user_doc)
+    return None
+  
+  def find_user_by_id(self, user_id: str) -> Optional[UserInDB]:
+    """
+    Find user by ID.
+
+    Args:
+        user_id (str): User ID to search for
+
+    Returns:
+        UserInDB or None: User if found, None otherwise
+    """
+    try:
+      object_id = ObjectId(user_id)
+      user_doc = self.collection.find_one({"_id": object_id})
+      if user_doc:
+        return UserInDB(**user_doc)
+    except Exception:
+      # Invalid ObjectId format
+      pass
+    return None
+  
+  def find_user_by_email(self, email: str) -> Optional[UserInDB]:
+    """
+    Find user by email address.
+
+    Args:
+        email (str): Email address to search for
+
+    Returns:
+        UserInDB or None: User if found, None otherwise
+    """
+    user_doc = self.collection.find_one({"email": email})
+    if user_doc:
+      return UserInDB(**user_doc)
+    return None
+  
+  def update_user(self, user_id: str, user_update: UserUpdate) -> Optional[UserInDB]:
+    """
+    Update user information.
+
+    Args:
+        user_id (str): User ID to update
+        user_update (UserUpdate): Updated user data
+
+    Returns:
+        UserInDB or None: Updated user if found, None otherwise
+    """
+    try:
+      object_id = ObjectId(user_id)
+      
+      # Build update document with only provided fields
+      update_data = {"updated_at": datetime.utcnow()}
+      
+      if user_update.email is not None:
+        update_data["email"] = user_update.email
+      if user_update.hashed_password is not None:
+        update_data["hashed_password"] = user_update.hashed_password
+      if user_update.role is not None:
+        update_data["role"] = user_update.role
+      if user_update.is_active is not None:
+        update_data["is_active"] = user_update.is_active
+      
+      result = self.collection.update_one(
+        {"_id": object_id},
+        {"$set": update_data}
+      )
+      
+      if result.matched_count > 0:
+        return self.find_user_by_id(user_id)
+    
+    except Exception:
+      # Invalid ObjectId format or other errors
+      pass
+    return None
+  
+  def delete_user(self, user_id: str) -> bool:
+    """
+    Delete user from database.
+
+    Args:
+        user_id (str): User ID to delete
+
+    Returns:
+        bool: True if user was deleted, False otherwise
+    """
+    try:
+      object_id = ObjectId(user_id)
+      result = self.collection.delete_one({"_id": object_id})
+      return result.deleted_count > 0
+    except Exception:
+      # Invalid ObjectId format
+      return False
+  
+  def list_users(self, skip: int = 0, limit: int = 100) -> List[UserInDB]:
+    """
+    List users with pagination.
+
+    Args:
+        skip (int): Number of users to skip (default: 0)
+        limit (int): Maximum number of users to return (default: 100)
+
+    Returns:
+        List[UserInDB]: List of users
+    """
+    cursor = self.collection.find().skip(skip).limit(limit)
+    return [UserInDB(**user_doc) for user_doc in cursor]
+  
+  def count_users(self) -> int:
+    """
+    Count total number of users.
+
+    Returns:
+        int: Total number of users in database
+    """
+    return self.collection.count_documents({})
+  
+  def user_exists(self, username: str) -> bool:
+    """
+    Check if user exists by username.
+
+    Args:
+        username (str): Username to check
+
+    Returns:
+        bool: True if user exists, False otherwise
+    """
+    return self.collection.count_documents({"username": username}) > 0

src/file-processor/app/models/auth.py

@@ -0,0 +1,14 @@
+"""
+Authentication models and enums for user management.
+
+Contains user roles enumeration and authentication-related Pydantic models.
+"""
+
+from enum import Enum
+
+
+class UserRole(str, Enum):
+  """User roles enumeration with string values."""
+  
+  USER = "user"
+  ADMIN = "admin"

src/file-processor/app/models/user.py

@@ -0,0 +1,179 @@
+"""
+User models and validation for the MyDocManager application.
+
+Contains Pydantic models for user creation, updates, database representation,
+and API responses with proper validation and type safety.
+"""
+
+import re
+from datetime import datetime
+from typing import Optional, Any
+from bson import ObjectId
+from pydantic import BaseModel, Field, field_validator, EmailStr
+from pydantic_core import core_schema
+
+from app.models.auth import UserRole
+
+
+class PyObjectId(ObjectId):
+    """Custom ObjectId type for Pydantic v2 compatibility."""
+    
+    @classmethod
+    def __get_pydantic_core_schema__(
+        cls, source_type: Any, handler
+    ) -> core_schema.CoreSchema:
+        return core_schema.json_or_python_schema(
+            json_schema=core_schema.str_schema(),
+            python_schema=core_schema.union_schema([
+                core_schema.is_instance_schema(ObjectId),
+                core_schema.chain_schema([
+                    core_schema.str_schema(),
+                    core_schema.no_info_plain_validator_function(cls.validate),
+                ])
+            ]),
+            serialization=core_schema.plain_serializer_function_ser_schema(
+                lambda x: str(x)
+            ),
+        )
+    
+    @classmethod
+    def validate(cls, v):
+        if not ObjectId.is_valid(v):
+            raise ValueError("Invalid ObjectId")
+        return ObjectId(v)
+
+
+def validate_password_strength(password: str) -> str:
+    """
+    Validate password meets security requirements.
+    
+    Requirements:
+    - At least 8 characters long
+    - Contains at least one uppercase letter
+    - Contains at least one lowercase letter
+    - Contains at least one digit
+    - Contains at least one special character
+    
+    Args:
+        password: The password string to validate
+        
+    Returns:
+        str: The validated password
+        
+    Raises:
+        ValueError: If password doesn't meet requirements
+    """
+    if len(password) < 8:
+        raise ValueError("Password must be at least 8 characters long")
+    
+    if not re.search(r'[A-Z]', password):
+        raise ValueError("Password must contain at least one uppercase letter")
+    
+    if not re.search(r'[a-z]', password):
+        raise ValueError("Password must contain at least one lowercase letter")
+    
+    if not re.search(r'\d', password):
+        raise ValueError("Password must contain at least one digit")
+    
+    if not re.search(r'[!@#$%^&*()_+\-=\[\]{};:"\\|,.<>\/?]', password):
+        raise ValueError("Password must contain at least one special character")
+    
+    return password
+
+
+def validate_username_not_empty(username: str) -> str:
+    """
+    Validate username is not empty or whitespace only.
+    
+    Args:
+        username: The username string to validate
+        
+    Returns:
+        str: The validated username
+        
+    Raises:
+        ValueError: If username is empty or whitespace only
+    """
+    if not username or not username.strip():
+        raise ValueError("Username cannot be empty or whitespace only")
+    
+    return username.strip()
+
+
+class UserCreate(BaseModel):
+    """Model for creating a new user."""
+    
+    username: str
+    email: EmailStr
+    password: str
+    role: UserRole = UserRole.USER
+    
+    @field_validator('username')
+    @classmethod
+    def validate_username(cls, v):
+        return validate_username_not_empty(v)
+    
+    @field_validator('password')
+    @classmethod
+    def validate_password(cls, v):
+        return validate_password_strength(v)
+
+
+class UserUpdate(BaseModel):
+    """Model for updating an existing user."""
+    
+    username: Optional[str] = None
+    email: Optional[EmailStr] = None
+    password: Optional[str] = None
+    role: Optional[UserRole] = None
+    
+    @field_validator('username')
+    @classmethod
+    def validate_username(cls, v):
+        if v is not None:
+            return validate_username_not_empty(v)
+        return v
+    
+    @field_validator('password')
+    @classmethod
+    def validate_password(cls, v):
+        if v is not None:
+            return validate_password_strength(v)
+        return v
+
+
+class UserInDB(BaseModel):
+    """Model for user data stored in database."""
+    
+    id: PyObjectId = Field(default_factory=PyObjectId, alias="_id")
+    username: str
+    email: str
+    password_hash: str
+    role: UserRole
+    is_active: bool = True
+    created_at: datetime
+    updated_at: datetime
+    
+    model_config = {
+        "populate_by_name": True,
+        "arbitrary_types_allowed": True,
+        "json_encoders": {ObjectId: str}
+    }
+
+
+class UserResponse(BaseModel):
+    """Model for user data in API responses (excludes password_hash)."""
+    
+    id: PyObjectId = Field(alias="_id")
+    username: str
+    email: str
+    role: UserRole
+    is_active: bool
+    created_at: datetime
+    updated_at: datetime
+    
+    model_config = {
+        "populate_by_name": True,
+        "arbitrary_types_allowed": True,
+        "json_encoders": {ObjectId: str}
+    }

src/file-processor/app/utils/security.py

@@ -0,0 +1,74 @@
+"""
+Password security utilities using bcrypt for secure password hashing.
+
+This module provides secure password hashing and verification functions
+using the bcrypt algorithm with automatic salt generation.
+"""
+
+import bcrypt
+from typing import Union
+
+
+def hash_password(password: str) -> str:
+  """
+  Hash a password using bcrypt with automatic salt generation.
+
+  Args:
+      password: The plain text password to hash
+
+  Returns:
+      The hashed password as a string
+
+  Raises:
+      ValueError: If password is empty or None
+      RuntimeError: If bcrypt hashing fails
+  """
+  if not password:
+    raise ValueError("Password cannot be empty or None")
+  
+  try:
+    # Encode password to bytes and generate salt
+    password_bytes = password.encode('utf-8')
+    salt = bcrypt.gensalt()
+    
+    # Hash the password
+    hashed = bcrypt.hashpw(password_bytes, salt)
+    
+    # Return as string
+    return hashed.decode('utf-8')
+  
+  except Exception as e:
+    raise RuntimeError(f"Failed to hash password: {str(e)}")
+
+
+def verify_password(password: str, hashed_password: str) -> bool:
+  """
+  Verify a password against its hash.
+
+  Args:
+      password: The plain text password to verify
+      hashed_password: The hashed password to verify against
+
+  Returns:
+      True if password matches the hash, False otherwise
+
+  Raises:
+      ValueError: If password or hashed_password is empty or None
+      RuntimeError: If password verification fails due to malformed hash
+  """
+  if not password or not hashed_password:
+    raise ValueError("Password and hashed_password cannot be empty or None")
+  
+  try:
+    # Encode inputs to bytes
+    password_bytes = password.encode('utf-8')
+    hashed_bytes = hashed_password.encode('utf-8')
+    
+    # Verify password
+    return bcrypt.checkpw(password_bytes, hashed_bytes)
+  
+  except ValueError as e:
+    # bcrypt raises ValueError for malformed hashes
+    raise RuntimeError(f"Invalid hash format: {str(e)}")
+  except Exception as e:
+    raise RuntimeError(f"Failed to verify password: {str(e)}")

src/frontend/.gitignore

@@ -0,0 +1,24 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

src/frontend/README.md

@@ -0,0 +1,12 @@
+# React + Vite
+
+This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+
+Currently, two official plugins are available:
+
+- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) for Fast Refresh
+- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
+
+## Expanding the ESLint configuration
+
+If you are developing a production application, we recommend using TypeScript with type-aware lint rules enabled. Check out the [TS template](https://github.com/vitejs/vite/tree/main/packages/create-vite/template-react-ts) for information on how to integrate TypeScript and [`typescript-eslint`](https://typescript-eslint.io) in your project.

src/frontend/eslint.config.js

@@ -0,0 +1,29 @@
+import js from '@eslint/js'
+import globals from 'globals'
+import reactHooks from 'eslint-plugin-react-hooks'
+import reactRefresh from 'eslint-plugin-react-refresh'
+import { defineConfig, globalIgnores } from 'eslint/config'
+
+export default defineConfig([
+  globalIgnores(['dist']),
+  {
+    files: ['**/*.{js,jsx}'],
+    extends: [
+      js.configs.recommended,
+      reactHooks.configs['recommended-latest'],
+      reactRefresh.configs.vite,
+    ],
+    languageOptions: {
+      ecmaVersion: 2020,
+      globals: globals.browser,
+      parserOptions: {
+        ecmaVersion: 'latest',
+        ecmaFeatures: { jsx: true },
+        sourceType: 'module',
+      },
+    },
+    rules: {
+      'no-unused-vars': ['error', { varsIgnorePattern: '^[A-Z_]' }],
+    },
+  },
+])

src/frontend/index.html

@@ -0,0 +1,13 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Vite + React</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.jsx"></script>
+  </body>
+</html>

src/frontend/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "frontend",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "lint": "eslint .",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "react": "^19.1.1",
+    "react-dom": "^19.1.1"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.33.0",
+    "@types/react": "^19.1.10",
+    "@types/react-dom": "^19.1.7",
+    "@vitejs/plugin-react": "^5.0.0",
+    "eslint": "^9.33.0",
+    "eslint-plugin-react-hooks": "^5.2.0",
+    "eslint-plugin-react-refresh": "^0.4.20",
+    "globals": "^16.3.0",
+    "vite": "^7.1.2"
+  }
+}

src/frontend/public/vite.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>

src/frontend/src/App.css

@@ -0,0 +1,42 @@
+#root {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 2rem;
+  text-align: center;
+}
+
+.logo {
+  height: 6em;
+  padding: 1.5em;
+  will-change: filter;
+  transition: filter 300ms;
+}
+.logo:hover {
+  filter: drop-shadow(0 0 2em #646cffaa);
+}
+.logo.react:hover {
+  filter: drop-shadow(0 0 2em #61dafbaa);
+}
+
+@keyframes logo-spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  a:nth-of-type(2) .logo {
+    animation: logo-spin infinite 20s linear;
+  }
+}
+
+.card {
+  padding: 2em;
+}
+
+.read-the-docs {
+  color: #888;
+}

src/frontend/src/App.jsx

@@ -0,0 +1,35 @@
+import { useState } from 'react'
+import reactLogo from './assets/react.svg'
+import viteLogo from '/vite.svg'
+import './App.css'
+
+function App() {
+  const [count, setCount] = useState(0)
+
+  return (
+    <>
+      <div>
+        <a href="https://vite.dev" target="_blank">
+          <img src={viteLogo} className="logo" alt="Vite logo" />
+        </a>
+        <a href="https://react.dev" target="_blank">
+          <img src={reactLogo} className="logo react" alt="React logo" />
+        </a>
+      </div>
+      <h1>Vite + React</h1>
+      <div className="card">
+        <button onClick={() => setCount((count) => count + 1)}>
+          count is {count}
+        </button>
+        <p>
+          Edit <code>src/App.jsx</code> and save to test HMR
+        </p>
+      </div>
+      <p className="read-the-docs">
+        Click on the Vite and React logos to learn more
+      </p>
+    </>
+  )
+}
+
+export default App

src/frontend/src/assets/react.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="35.93" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 228"><path fill="#00D8FF" d="M210.483 73.824a171.49 171.49 0 0 0-8.24-2.597c.465-1.9.893-3.777 1.273-5.621c6.238-30.281 2.16-54.676-11.769-62.708c-13.355-7.7-35.196.329-57.254 19.526a171.23 171.23 0 0 0-6.375 5.848a155.866 155.866 0 0 0-4.241-3.917C100.759 3.829 77.587-4.822 63.673 3.233C50.33 10.957 46.379 33.89 51.995 62.588a170.974 170.974 0 0 0 1.892 8.48c-3.28.932-6.445 1.924-9.474 2.98C17.309 83.498 0 98.307 0 113.668c0 15.865 18.582 31.778 46.812 41.427a145.52 145.52 0 0 0 6.921 2.165a167.467 167.467 0 0 0-2.01 9.138c-5.354 28.2-1.173 50.591 12.134 58.266c13.744 7.926 36.812-.22 59.273-19.855a145.567 145.567 0 0 0 5.342-4.923a168.064 168.064 0 0 0 6.92 6.314c21.758 18.722 43.246 26.282 56.54 18.586c13.731-7.949 18.194-32.003 12.4-61.268a145.016 145.016 0 0 0-1.535-6.842c1.62-.48 3.21-.974 4.76-1.488c29.348-9.723 48.443-25.443 48.443-41.52c0-15.417-17.868-30.326-45.517-39.844Zm-6.365 70.984c-1.4.463-2.836.91-4.3 1.345c-3.24-10.257-7.612-21.163-12.963-32.432c5.106-11 9.31-21.767 12.459-31.957c2.619.758 5.16 1.557 7.61 2.4c23.69 8.156 38.14 20.213 38.14 29.504c0 9.896-15.606 22.743-40.946 31.14Zm-10.514 20.834c2.562 12.94 2.927 24.64 1.23 33.787c-1.524 8.219-4.59 13.698-8.382 15.893c-8.067 4.67-25.32-1.4-43.927-17.412a156.726 156.726 0 0 1-6.437-5.87c7.214-7.889 14.423-17.06 21.459-27.246c12.376-1.098 24.068-2.894 34.671-5.345a134.17 134.17 0 0 1 1.386 6.193ZM87.276 214.515c-7.882 2.783-14.16 2.863-17.955.675c-8.075-4.657-11.432-22.636-6.853-46.752a156.923 156.923 0 0 1 1.869-8.499c10.486 2.32 22.093 3.988 34.498 4.994c7.084 9.967 14.501 19.128 21.976 27.15a134.668 134.668 0 0 1-4.877 4.492c-9.933 8.682-19.886 14.842-28.658 17.94ZM50.35 144.747c-12.483-4.267-22.792-9.812-29.858-15.863c-6.35-5.437-9.555-10.836-9.555-15.216c0-9.322 13.897-21.212 37.076-29.293c2.813-.98 5.757-1.905 8.812-2.773c3.204 10.42 7.406 21.315 12.477 32.332c-5.137 11.18-9.399 22.249-12.634 32.792a134.718 134.718 0 0 1-6.318-1.979Zm12.378-84.26c-4.811-24.587-1.616-43.134 6.425-47.789c8.564-4.958 27.502 2.111 47.463 19.835a144.318 144.318 0 0 1 3.841 3.545c-7.438 7.987-14.787 17.08-21.808 26.988c-12.04 1.116-23.565 2.908-34.161 5.309a160.342 160.342 0 0 1-1.76-7.887Zm110.427 27.268a347.8 347.8 0 0 0-7.785-12.803c8.168 1.033 15.994 2.404 23.343 4.08c-2.206 7.072-4.956 14.465-8.193 22.045a381.151 381.151 0 0 0-7.365-13.322Zm-45.032-43.861c5.044 5.465 10.096 11.566 15.065 18.186a322.04 322.04 0 0 0-30.257-.006c4.974-6.559 10.069-12.652 15.192-18.18ZM82.802 87.83a323.167 323.167 0 0 0-7.227 13.238c-3.184-7.553-5.909-14.98-8.134-22.152c7.304-1.634 15.093-2.97 23.209-3.984a321.524 321.524 0 0 0-7.848 12.897Zm8.081 65.352c-8.385-.936-16.291-2.203-23.593-3.793c2.26-7.3 5.045-14.885 8.298-22.6a321.187 321.187 0 0 0 7.257 13.246c2.594 4.48 5.28 8.868 8.038 13.147Zm37.542 31.03c-5.184-5.592-10.354-11.779-15.403-18.433c4.902.192 9.899.29 14.978.29c5.218 0 10.376-.117 15.453-.343c-4.985 6.774-10.018 12.97-15.028 18.486Zm52.198-57.817c3.422 7.8 6.306 15.345 8.596 22.52c-7.422 1.694-15.436 3.058-23.88 4.071a382.417 382.417 0 0 0 7.859-13.026a347.403 347.403 0 0 0 7.425-13.565Zm-16.898 8.101a358.557 358.557 0 0 1-12.281 19.815a329.4 329.4 0 0 1-23.444.823c-7.967 0-15.716-.248-23.178-.732a310.202 310.202 0 0 1-12.513-19.846h.001a307.41 307.41 0 0 1-10.923-20.627a310.278 310.278 0 0 1 10.89-20.637l-.001.001a307.318 307.318 0 0 1 12.413-19.761c7.613-.576 15.42-.876 23.31-.876H128c7.926 0 15.743.303 23.354.883a329.357 329.357 0 0 1 12.335 19.695a358.489 358.489 0 0 1 11.036 20.54a329.472 329.472 0 0 1-11 20.722Zm22.56-122.124c8.572 4.944 11.906 24.881 6.52 51.026c-.344 1.668-.73 3.367-1.15 5.09c-10.622-2.452-22.155-4.275-34.23-5.408c-7.034-10.017-14.323-19.124-21.64-27.008a160.789 160.789 0 0 1 5.888-5.4c18.9-16.447 36.564-22.941 44.612-18.3ZM128 90.808c12.625 0 22.86 10.235 22.86 22.86s-10.235 22.86-22.86 22.86s-22.86-10.235-22.86-22.86s10.235-22.86 22.86-22.86Z"></path></svg>

src/frontend/src/index.css

@@ -0,0 +1,68 @@
+:root {
+  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+a {
+  font-weight: 500;
+  color: #646cff;
+  text-decoration: inherit;
+}
+a:hover {
+  color: #535bf2;
+}
+
+body {
+  margin: 0;
+  display: flex;
+  place-items: center;
+  min-width: 320px;
+  min-height: 100vh;
+}
+
+h1 {
+  font-size: 3.2em;
+  line-height: 1.1;
+}
+
+button {
+  border-radius: 8px;
+  border: 1px solid transparent;
+  padding: 0.6em 1.2em;
+  font-size: 1em;
+  font-weight: 500;
+  font-family: inherit;
+  background-color: #1a1a1a;
+  cursor: pointer;
+  transition: border-color 0.25s;
+}
+button:hover {
+  border-color: #646cff;
+}
+button:focus,
+button:focus-visible {
+  outline: 4px auto -webkit-focus-ring-color;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #213547;
+    background-color: #ffffff;
+  }
+  a:hover {
+    color: #747bff;
+  }
+  button {
+    background-color: #f9f9f9;
+  }
+}

src/frontend/src/main.jsx

@@ -0,0 +1,10 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import './index.css'
+import App from './App.jsx'
+
+createRoot(document.getElementById('root')).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)

src/frontend/vite.config.js

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react()],
+})