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/App.svelte

@@ -0,0 +1,39 @@
+<script>
+  import { onMount } from 'svelte'
+  import { api } from './lib/api.js'
+  import { currentDate } from './lib/stores.js'
+  import Dashboard from './components/Dashboard.svelte'
+
+  // Every async view handles loading / error / empty states (spec §8.2 rule 4)
+  let backend = $state({ loading: true, ok: false, error: null })
+
+  onMount(async () => {
+    try {
+      await api.health()
+      backend = { loading: false, ok: true, error: null }
+    } catch (e) {
+      backend = { loading: false, ok: false, error: e.message }
+    }
+  })
+</script>
+
+<main>
+  <h1>CalCount</h1>
+
+  {#if backend.loading}
+    <p>Connecting to backend…</p>
+  {:else if backend.error}
+    <p role="alert">Backend unreachable: {backend.error}</p>
+  {:else}
+    <Dashboard date={currentDate.value} />
+  {/if}
+</main>
+
+<style>
+  main {
+    max-width: 32rem;
+    margin: 0 auto;
+    padding: 1rem;
+    font-family: system-ui, sans-serif;
+  }
+</style>