feat: add favorites panel to meal generator, remove redundant Another one button

- Add clickable favorites counter with expandable panel
- Render saved recipes list with remove button
- Remove duplicate 'Another one' button (Generate already covers it)
- Sync favorite button state when removing from panel

public/sw.js

@@ -0,0 +1,56 @@
+const CACHE_NAME = "randify-v1";
+
+self.addEventListener("install", (event) => {
+  self.skipWaiting();
+});
+
+self.addEventListener("activate", (event) => {
+  event.waitUntil(self.clients.claim());
+});
+
+self.addEventListener("fetch", (event) => {
+  const { request } = event;
+  const isNavigate = request.mode === "navigate";
+  const isSameOrigin = new URL(request.url).origin === self.location.origin;
+
+  if (!isSameOrigin) {
+    return;
+  }
+
+  if (isNavigate) {
+    // Network-first for HTML pages: fresh content when online,
+    // fallback to cache when offline.
+    event.respondWith(
+      fetch(request)
+        .then((response) => {
+          if (response && response.status === 200) {
+            const clone = response.clone();
+            caches.open(CACHE_NAME).then((cache) => cache.put(request, clone));
+          }
+          return response;
+        })
+        .catch(() => caches.match(request)),
+    );
+  } else {
+    // Cache-first for static assets (JS, CSS, SVG, fonts, etc.)
+    event.respondWith(
+      caches.match(request).then((cached) => {
+        if (cached) {
+          return cached;
+        }
+        return fetch(request).then((response) => {
+          if (
+            !response ||
+            response.status !== 200 ||
+            response.type !== "basic"
+          ) {
+            return response;
+          }
+          const clone = response.clone();
+          caches.open(CACHE_NAME).then((cache) => cache.put(request, clone));
+          return response;
+        });
+      }),
+    );
+  }
+});