fix(web): resolve chat image freeze and dynamic import failures

- attachment-block: use loading=eager with explicit dimensions to prevent Chromium lazy-load intervention from freezing the page
- router: add error handler for chunk load failures to auto-reload
- vite: pre-bundle route page dependencies to improve initial load speed

apps/web/src/pages/chat/components/attachment-block.vue

@@ -16,7 +16,9 @@
           :src="getUrl(att)"
           :alt="String(att.name ?? 'image')"
           class="w-full h-full object-contain pointer-events-none"
-          loading="lazy"
+          loading="eager"
+          width="192"
+          height="192"
         >
         <video
           v-else

apps/web/src/router.ts

@@ -133,6 +133,21 @@ const router = createRouter({
   history: createWebHistory(),
   routes,
 })
+
+// Handle chunk load errors (e.g. user aborted refresh, network failure, new deployment)
+router.onError((error) => {
+  const isChunkLoadError =
+    error.message.includes('Failed to fetch dynamically imported module') ||
+    error.message.includes('Importing a module script failed') ||
+    error.message.includes('error loading dynamically imported module')
+  if (isChunkLoadError) {
+    console.warn('[Router] Chunk load failed, reloading...', error.message)
+    window.location.reload()
+    return
+  }
+  throw error
+})
+
 router.beforeEach((to) => {
   const token = localStorage.getItem('token')