05/31 Phase 1: initial codes

app/models/ai_insight.py

@@ -0,0 +1,22 @@
+from app.extensions import db
+from datetime import datetime
+
+
+class AiInsight(db.Model):
+    __tablename__ = 'ai_insights'
+
+    id = db.Column(db.Integer, primary_key=True)
+    insight_date = db.Column(db.Date, nullable=False, index=True)
+    insight_type = db.Column(
+        db.Enum('daily_summary', 'weekly_summary', 'chat_response', 'alert'),
+        nullable=False,
+        default='daily_summary'
+    )
+    prompt_summary = db.Column(db.Text, nullable=True)  # what context was sent
+    content = db.Column(db.Text, nullable=False)         # AI response
+    model_used = db.Column(db.String(64), nullable=True)
+    tokens_used = db.Column(db.Integer, nullable=True)
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+
+    def __repr__(self):
+        return f'<AiInsight {self.insight_type} {self.insight_date}>'