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/vite.config.js

@@ -0,0 +1,17 @@
+import { defineConfig } from 'vite'
+import { svelte } from '@sveltejs/vite-plugin-svelte'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [svelte()],
+  server: {
+    // Dev proxy so the frontend can call /api without CORS in production-style setups
+    proxy: {
+      '/api': 'http://localhost:8000',
+    },
+  },
+  test: {
+    // Vitest (spec §8.4): only for stores/format logic, not components
+    include: ['src/**/*.test.js'],
+  },
+})