feat: integrate Peg AI wellness coach

server/app/main.py

@@ -1,4 +1,6 @@
 from datetime import datetime, timezone
+import secrets
+import uuid
 from fastapi import Depends, FastAPI, HTTPException, Response
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.security import OAuth2PasswordRequestForm
@@ -7,7 +9,8 @@ from sqlalchemy.orm import Session
 from .config import get_settings
 from .db import Base, engine, get_db
 from .models import Entry, Profile, User
-from .schemas import EntryIn, EntryOut, ProfileIn, ProfileOut, Register, Token
+from .schemas import CoachChatIn, CoachChatOut, EntryIn, EntryOut, ProfileIn, ProfileOut, Register, Token
+from .coach import chat_with_peg
 from .security import current_user, hash_password, make_token, verify_password
 
 cfg = get_settings()
@@ -28,6 +31,11 @@ def health():
     return {"status": "ok", "medical_notice": "MetaBloom does not diagnose or replace medical care."}
 
 
+@app.post("/coach/chat", response_model=CoachChatOut)
+async def coach_chat(data: CoachChatIn, user: User = Depends(current_user)):
+    return await chat_with_peg(data, cfg)
+
+
 @app.post("/auth/register", response_model=Token, status_code=201)
 def register(data: Register, db: Session = Depends(get_db)):
     email = data.email.lower()
@@ -39,6 +47,20 @@ def register(data: Register, db: Session = Depends(get_db)):
     return Token(access_token=make_token(user.id))
 
 
+@app.post("/auth/guest", response_model=Token, status_code=201)
+def guest_session(db: Session = Depends(get_db)):
+    """Create a private pseudonymous session for a first app launch."""
+    user = User(
+        email=f"guest-{uuid.uuid4()}@local.invalid",
+        password_hash=hash_password(secrets.token_urlsafe(32)),
+    )
+    db.add(user)
+    db.flush()
+    db.add(Profile(user_id=user.id))
+    db.commit()
+    return Token(access_token=make_token(user.id))
+
+
 @app.post("/auth/token", response_model=Token)
 def login(form: OAuth2PasswordRequestForm = Depends(), db: Session = Depends(get_db)):
     user = db.scalar(select(User).where(User.email == form.username.lower()))
@@ -106,4 +128,3 @@ def export_account(user: User = Depends(current_user)):
 def delete_account(user: User = Depends(current_user), db: Session = Depends(get_db)):
     db.delete(user); db.commit()
     return Response(status_code=204)
-