feat: complete application updates

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

public/manifest.webmanifest

@@ -0,0 +1,25 @@
+{
+  "name": "نادمی تکس | پنل مدیریت",
+  "short_name": "پنل نادمی تکس",
+  "description": "پنل مدیریت سفارش‌های عمده",
+  "lang": "fa",
+  "dir": "rtl",
+  "start_url": "./",
+  "display": "standalone",
+  "background_color": "#081d39",
+  "theme_color": "#081d39",
+  "icons": [
+    {
+      "src": "icon-192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any maskable"
+    }
+  ]
+}

public/sw.js

@@ -0,0 +1,26 @@
+const CACHE_NAME = 'nademitex-admin-v1'
+
+self.addEventListener('install', () => {
+  self.skipWaiting()
+})
+
+self.addEventListener('activate', (event) => {
+  event.waitUntil(self.clients.claim())
+})
+
+self.addEventListener('fetch', (event) => {
+  if (event.request.method !== 'GET') return
+
+  const url = new URL(event.request.url)
+  if (url.origin !== self.location.origin || url.pathname.includes('/server/api')) return
+
+  event.respondWith(
+    fetch(event.request)
+      .then((response) => {
+        const copy = response.clone()
+        caches.open(CACHE_NAME).then((cache) => cache.put(event.request, copy))
+        return response
+      })
+      .catch(() => caches.match(event.request)),
+  )
+})