Introduce initial version of the Lonc app with core features, styling, and configurations.

- Add base app structure, including Bootstrap setup and Alpine.js integration.
- Implement authentication flow with session handling.
- Integrate stock management and label creation functionalities.
- Include responsive styling and theme using CSS variables and custom components.
- Add API clients for Tryton-based backend.
- Set up kitchen and dashboard navigation workflows.
- Configure service worker for PWA support.

public/service-worker.js

@@ -0,0 +1,55 @@
+const CACHE_NAME = 'lonc-shell-v1';
+const APP_SHELL = ['/', '/index.html', '/manifest.webmanifest', '/offline.html', '/icons/icon.svg', '/icons/icon-mask.svg'];
+
+self.addEventListener('install', (event) => {
+  event.waitUntil(caches.open(CACHE_NAME).then((cache) => cache.addAll(APP_SHELL)));
+  self.skipWaiting();
+});
+
+self.addEventListener('activate', (event) => {
+  event.waitUntil(
+    caches.keys().then((keys) =>
+      Promise.all(
+        keys
+          .filter((key) => key !== CACHE_NAME)
+          .map((key) => caches.delete(key)),
+      ),
+    ),
+  );
+  self.clients.claim();
+});
+
+self.addEventListener('fetch', (event) => {
+  if (event.request.method !== 'GET') {
+    return;
+  }
+
+  const requestUrl = new URL(event.request.url);
+
+  if (requestUrl.origin !== self.location.origin) {
+    return;
+  }
+
+  if (event.request.mode === 'navigate') {
+    event.respondWith(
+      fetch(event.request).catch(async () => {
+        const shell = await caches.match('/index.html');
+        return shell || caches.match('/offline.html');
+      }),
+    );
+    return;
+  }
+
+  event.respondWith(
+    caches.match(event.request).then((response) => {
+      return (
+        response ||
+        fetch(event.request).then((networkResponse) => {
+          const clone = networkResponse.clone();
+          caches.open(CACHE_NAME).then((cache) => cache.put(event.request, clone));
+          return networkResponse;
+        })
+      );
+    }),
+  );
+});