diff --git a/frontend/src/api.js b/frontend/src/api.js
index 5449dea..873f5e8 100644
--- a/frontend/src/api.js
+++ b/frontend/src/api.js
@@ -11,7 +11,13 @@ const BASE = import.meta.env.VITE_API_BASE || ''
 export async function api(path, opts = {}) {
   const headers = { ...(opts.headers || {}) }
   if (auth.token) headers.Authorization = `Bearer ${auth.token}`
-  const r = await fetch(`${BASE}/admin/api${path}`, { ...opts, headers })
+  // 请求不能无限挂起(比如上传走丢的网关连接)——120s 超时兜底
+  let signal = opts.signal
+  if (typeof AbortSignal !== 'undefined' && AbortSignal.timeout) {
+    const t = AbortSignal.timeout(120000)
+    signal = signal && AbortSignal.any ? AbortSignal.any([signal, t]) : t
+  }
+  const r = await fetch(`${BASE}/admin/api${path}`, { ...opts, headers, signal })
   let data = null
   try {
     data = await r.json()
diff --git a/frontend/src/components/canvas/CanvasStage.vue b/frontend/src/components/canvas/CanvasStage.vue
index 298614d..4adc24e 100644
--- a/frontend/src/components/canvas/CanvasStage.vue
+++ b/frontend/src/components/canvas/CanvasStage.vue
@@ -766,7 +766,6 @@ defineExpose({
     </div>
 
     <div v-if="marquee" class="cv-marquee" :style="marquee" />
-    <div class="cv-hint">拖拽空白平移 · Ctrl+滚轮缩放 · 依次点击连接点连线（拖线调弧度） · 双击笔记编辑</div>
   </div>
 </template>
 
@@ -844,24 +843,4 @@ defineExpose({
   pointer-events: none;
   border-radius: 4px;
 }
-.cv-hint {
-  position: absolute;
-  left: 10px;
-  bottom: 10px;
-  font-size: 11px;
-  font-weight: 600;
-  color: var(--fg-2);
-  background: var(--surface);
-  -webkit-backdrop-filter: blur(10px);
-  backdrop-filter: blur(10px);
-  border: 1px solid var(--glass-border);
-  border-radius: 999px;
-  padding: 3px 14px;
-  box-shadow: var(--glass-shadow);
-  pointer-events: none;
-  white-space: nowrap;
-  max-width: 92%;
-  overflow: hidden;
-  text-overflow: ellipsis;
-}
 </style>
diff --git a/frontend/src/views/CanvasView.vue b/frontend/src/views/CanvasView.vue
index 0f54a41..df4e022 100644
--- a/frontend/src/views/CanvasView.vue
+++ b/frontend/src/views/CanvasView.vue
@@ -43,6 +43,12 @@ const gen = reactive({ kind: 'image', modelId: '', prompt: '', ratio: '', resolu
 const runningGens = ref(0)
 const genBusy = computed(() => runningGens.value > 0)
 const genMsg = ref('')
+// 消息只做短暂 toast 提示,自动消失不常驻
+let genMsgTimer = null
+watch(genMsg, (v) => {
+  clearTimeout(genMsgTimer)
+  if (v) genMsgTimer = setTimeout(() => { genMsg.value = '' }, 3500)
+})
 const kindModels = computed(() =>
   (allModels.value || []).filter((m) => m.enabled !== false && m.type === gen.kind),
 )
@@ -526,7 +532,7 @@ async function uploadImageFile(file, at = null) {
       genMsg.value = r.data?.detail || `上传失败 (${r.status})`
     }
   } catch (e) {
-    genMsg.value = String(e)
+    genMsg.value = e?.name === 'AbortError' ? '上传超时,请重试' : String(e)
   } finally {
     uploadBusy.value = false
   }