fix: make offline startup responsive

apps/web/src/App.vue

@@ -1,26 +1,40 @@
 <script setup lang="ts">
 import { onBeforeUnmount, onMounted } from "vue";
-import { WifiOff } from "@lucide/vue";
+import { ref } from "vue";
+import { RefreshCw, WifiOff } from "@lucide/vue";
 import { useAuthStore } from "./stores/auth";
 
 const auth = useAuthStore();
-const retrySession = () => {
-  if (typeof navigator === "undefined" || navigator.onLine) void auth.loadSession(true);
+const reconnecting = ref(false);
+const retrySession = async () => {
+  if (reconnecting.value || (typeof navigator !== "undefined" && !navigator.onLine)) return;
+  reconnecting.value = true;
+  try {
+    await auth.loadSession(true);
+  } finally {
+    reconnecting.value = false;
+  }
 };
+const handleOnline = () => void retrySession();
 
-onMounted(() => window.addEventListener("online", retrySession));
-onBeforeUnmount(() => window.removeEventListener("online", retrySession));
+onMounted(() => window.addEventListener("online", handleOnline));
+onBeforeUnmount(() => window.removeEventListener("online", handleOnline));
 </script>
 
 <template>
   <RouterView />
-  <div
+  <button
     v-if="auth.unavailable && auth.user"
     class="offline-status"
     role="status"
-    aria-label="服务暂不可用，当前显示本地数据"
-    title="服务暂不可用，当前显示本地数据"
+    aria-label="服务暂不可用，点击重连"
+    title="服务暂不可用，点击重连"
+    type="button"
+    :disabled="reconnecting"
+    @click="void retrySession()"
   >
     <WifiOff :size="16" />
-  </div>
+    <span>{{ reconnecting ? "正在重连" : "服务暂不可用 · 点击重连" }}</span>
+    <RefreshCw :size="14" :class="{ spinning: reconnecting }" />
+  </button>
 </template>

apps/web/src/data/api.ts

@@ -9,15 +9,23 @@ export class ApiError extends Error {
 
 export async function apiRequest<T>(
   path: string,
-  options: { method?: string; body?: unknown } = {},
+  options: { method?: string; body?: unknown; timeoutMs?: number } = {},
 ): Promise<T> {
-  const response = await fetch(path, {
-    method: options.method ?? "GET",
-    credentials: "same-origin",
-    headers: options.body === undefined ? undefined : { "Content-Type": "application/json" },
-    body: options.body === undefined ? undefined : JSON.stringify(options.body),
-  });
-  const payload = await response.json().catch(() => ({})) as { error?: string };
-  if (!response.ok) throw new ApiError(payload.error ?? "请求失败", response.status);
-  return payload as T;
+  const controller = new AbortController();
+  const timeoutMs = options.timeoutMs ?? (options.method && options.method !== "GET" ? 10000 : 3000);
+  const timeout = window.setTimeout(() => controller.abort(), timeoutMs);
+  try {
+    const response = await fetch(path, {
+      method: options.method ?? "GET",
+      credentials: "same-origin",
+      headers: options.body === undefined ? undefined : { "Content-Type": "application/json" },
+      body: options.body === undefined ? undefined : JSON.stringify(options.body),
+      signal: controller.signal,
+    });
+    const payload = await response.json().catch(() => ({})) as { error?: string };
+    if (!response.ok) throw new ApiError(payload.error ?? "请求失败", response.status);
+    return payload as T;
+  } finally {
+    window.clearTimeout(timeout);
+  }
 }

apps/web/src/styles.css

@@ -14,21 +14,32 @@
 
 .offline-status {
   position: fixed;
-  top: max(8px, env(safe-area-inset-top));
   right: 8px;
-  z-index: 100;
-  width: 30px;
-  height: 30px;
-  display: grid;
-  place-items: center;
-  padding: 0;
+  bottom: calc(68px + env(safe-area-inset-bottom) + 4px);
+  left: 8px;
+  z-index: 6;
+  height: 28px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
   border: 1px solid #e9c98d;
-  border-radius: 50%;
+  border-radius: 6px;
+  padding: 0 10px;
   background: rgba(255, 248, 228, .96);
   color: #795b19;
+  font-size: 10px;
+  line-height: 1;
   box-shadow: 0 2px 8px rgba(74, 57, 18, .12);
 }
 
+.offline-status:disabled { opacity: .8; }
+.offline-status .spinning { animation: offline-reconnect-spin 800ms linear infinite; }
+
+@keyframes offline-reconnect-spin {
+  to { transform: rotate(360deg); }
+}
+
 html,
 body,
 #app {

apps/web/vite.config.ts

@@ -103,6 +103,12 @@ function offlineServiceWorkerPlugin(): Plugin {
       const source = `const CACHE_NAME = "cents-shell-v4";
 const PRECACHE = ${JSON.stringify(precache, null, 2)};
 
+function fetchWithTimeout(request, timeoutMs) {
+  const controller = new AbortController();
+  const timer = setTimeout(() => controller.abort(), timeoutMs);
+  return fetch(request, { signal: controller.signal }).finally(() => clearTimeout(timer));
+}
+
 self.addEventListener("install", (event) => {
   event.waitUntil(caches.open(CACHE_NAME).then((cache) => cache.addAll(PRECACHE)).then(() => self.skipWaiting()));
 });
@@ -122,7 +128,7 @@ self.addEventListener("fetch", (event) => {
 
   if (event.request.mode === "navigate") {
     event.respondWith(
-      fetch(event.request).then((response) => {
+      fetchWithTimeout(event.request, 1500).then((response) => {
         if (!response.ok) throw new Error("navigation unavailable");
         const copy = response.clone();
         void caches.open(CACHE_NAME).then((cache) => cache.put("/", copy));