Initial project scaffold: FastAPI backend + Svelte 5 frontend

Backend (uv): FastAPI app with routers (foods, log, targets, OFF proxy),
SQLAlchemy models, Pydantic schemas, migration runner + 0001 initial schema,
example pytest suite (7 tests).
Frontend (npm): Vite 7 + Svelte 5 runes, lib/ (api, stores, scanner, format)
per spec §7, placeholder components, example vitest suite (4 tests).
SPEC.md §1: registered uvicorn and Vitest (rule §8.3.3).

backend/routers/targets.py

@@ -0,0 +1,24 @@
+"""Targets router (spec §3.4)."""
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy import select
+from sqlalchemy.orm import Session
+
+from database import get_db
+from models import Target
+from schemas import TargetRead
+
+router = APIRouter(prefix="/api/targets", tags=["targets"])
+
+
+@router.get("", response_model=list[TargetRead])
+def list_targets(db: Session = Depends(get_db)):
+    return db.scalars(select(Target).order_by(Target.start_date)).all()
+
+
+@router.get("/current", response_model=TargetRead)
+def current_target(db: Session = Depends(get_db)):
+    target = db.scalar(select(Target).where(Target.end_date.is_(None)))
+    if target is None:
+        raise HTTPException(status_code=404, detail="No active target")
+    return target