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).

frontend/src/components/FoodEditor.svelte

@@ -0,0 +1,5 @@
+<script>
+  // FoodEditor — Food create/edit form, shared by scan/search/library flows (spec §4.5, §4.7)
+</script>
+
+<p>FoodEditor (placeholder)</p>