Get project working locally

app/models.py

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+from flask_sqlalchemy import SQLAlchemy
+from flask_login import UserMixin
+
+from app import db
+
+class User(UserMixin, db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    username = db.Column(db.String(255), nullable=False, unique=True)
+    password_hash = db.Column(db.Text, nullable=False)
+    profile = db.relationship('Profile', backref='user', uselist=False)
+
+class Profile(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    user_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)
+    name = db.Column(db.String(100))
+    email = db.Column(db.String(150), unique=True)
+    profile_pic = db.Column(db.Text)  # Store image as a base64 string
+    systolic_threshold = db.Column(db.Integer, default=140)
+    diastolic_threshold = db.Column(db.Integer, default=90)
+    dark_mode = db.Column(db.Boolean, default=False)
+
+class Reading(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    user_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)
+    timestamp = db.Column(db.DateTime, nullable=False)
+    systolic = db.Column(db.Integer, nullable=False)
+    diastolic = db.Column(db.Integer, nullable=False)
+    heart_rate = db.Column(db.Integer, nullable=False)
+    user = db.relationship('User', backref='readings')