feat: complete ni-mail rewrite with Graph API, IMAP, OTP extractor, Web UI and Docker deployment

app/models.py

@@ -0,0 +1,19 @@
+from app.db import db
+
+class Account(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    email = db.Column(db.String(128), unique=True, nullable=False)
+    method = db.Column(db.String(10), default="graph")  # graph | imap
+    client_id = db.Column(db.String(64))
+    refresh_token = db.Column(db.Text)
+    password = db.Column(db.String(128))
+    created_at = db.Column(db.DateTime, default=db.func.now())
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "email": self.email,
+            "method": self.method,
+            "client_id": self.client_id,
+            "created_at": str(self.created_at) if self.created_at else None
+        }