v0.1.0 — Phase 1: Go Backend + SQLite + Seed Data

- Wails project setup (Go + React-TS)
- SQLite schema (allergens, additives, products, week_plans, plan_entries, special_days)
- 14 EU allergens (LMIV 1169/2011)
- 24 German food additives
- 99 products imported from Excel with allergen/additive mappings
- Full Wails bindings (CRUD for products, week plans, entries, special days)
- OTA updater stub (version check against HTTPS endpoint)
- Pure Go SQLite (no CGO) for easy Windows cross-compilation

frontend/src/App.tsx

@@ -0,0 +1,28 @@
+import {useState} from 'react';
+import logo from './assets/images/logo-universal.png';
+import './App.css';
+import {Greet} from "../wailsjs/go/main/App";
+
+function App() {
+    const [resultText, setResultText] = useState("Please enter your name below 👇");
+    const [name, setName] = useState('');
+    const updateName = (e: any) => setName(e.target.value);
+    const updateResultText = (result: string) => setResultText(result);
+
+    function greet() {
+        Greet(name).then(updateResultText);
+    }
+
+    return (
+        <div id="App">
+            <img src={logo} id="logo" alt="logo"/>
+            <div id="result" className="result">{resultText}</div>
+            <div id="input" className="input-box">
+                <input id="name" className="input" onChange={updateName} autoComplete="off" name="input" type="text"/>
+                <button className="btn" onClick={greet}>Greet</button>
+            </div>
+        </div>
+    )
+}
+
+export default App