new file: .dockerignore

new file:   .env.example
	new file:   Dockerfile
	new file:   app.py
	new file:   blueprints/__init__.py
	new file:   blueprints/auth.py
	new file:   blueprints/chat.py
	new file:   blueprints/context.py
	new file:   blueprints/documents.py
	new file:   blueprints/main.py
	new file:   config.py
	new file:   docker-compose.yml
	new file:   models/__init__.py
	new file:   models/chat_session.py
	new file:   models/document.py
	new file:   models/user.py
	new file:   requirements.txt
	new file:   services/__init__.py
	new file:   services/document_parser.py
	new file:   services/llm_service.py
	new file:   services/rag_service.py
	new file:   services/url_scraper.py
	new file:   static/css/style.css
	new file:   static/js/chat.js
	new file:   static/js/inline_chat.js
	new file:   static/js/main.js
	new file:   templates/base.html
	new file:   templates/document_view.html
	new file:   templates/index.html
	new file:   templates/login.html
	new file:   templates/register.html

models/user.py

@@ -0,0 +1,21 @@
+from flask_sqlalchemy import SQLAlchemy
+from flask_login import UserMixin
+from datetime import datetime
+from . import db
+
+
+class User(UserMixin, db.Model):
+    __tablename__ = "users"
+
+    id = db.Column(db.Integer, primary_key=True)
+    username = db.Column(db.String(64), unique=True, nullable=False)
+    email = db.Column(db.String(120), unique=True, nullable=False)
+    password_hash = db.Column(db.String(256), nullable=False)
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+
+    documents = db.relationship("Document", backref="owner", lazy=True, cascade="all, delete-orphan")
+    url_contexts = db.relationship("UrlContext", backref="owner", lazy=True, cascade="all, delete-orphan")
+    chat_sessions = db.relationship("ChatSession", backref="owner", lazy=True, cascade="all, delete-orphan")
+
+    def __repr__(self):
+        return f"<User {self.username}>"