fix(web): code review pass — scroll watch, SSE same-origin, store concurrency, modal reset, admin validation

web/src/views/chat/ChatDetailView.vue

@@ -150,8 +150,23 @@ onMounted(async () => {
   }
 })
 
+// 路由 conversationId 切换：在 /chat ↔ /chat/:id 同组件复用时同步状态。
 watch(
-  () => chat.messages.length,
+  () => route.params.conversationId,
+  async (cid) => {
+    if (typeof cid === 'string' && cid !== '') {
+      if (chat.currentConversation?.id !== cid) {
+        await chat.openConversation(cid)
+      }
+    } else {
+      chat.closeCurrent()
+    }
+  },
+)
+
+// 流式输出时 messages.length 不变，只 content 增长 —— 同时观察末消息内容长度。
+watch(
+  () => [chat.messages.length, chat.messages.at(-1)?.content?.length ?? 0],
   () => {
     nextTick(() => {
       const el = scrollEl.value

web/src/views/chat/ConversationCreateModal.vue

@@ -116,6 +116,25 @@ watch(
   { immediate: true },
 )
 
+// 每次从外部重新打开时把表单还原到初始状态。
+watch(
+  () => props.show,
+  (open) => {
+    if (open) reset()
+  },
+)
+
+function reset() {
+  form.value = { model_id: '', template_id: null, system_prompt: '' }
+  if (props.projectId) {
+    mountKind.value = 'project'
+    mountID.value = props.projectId
+  } else {
+    mountKind.value = null
+    mountID.value = ''
+  }
+}
+
 function update(v: boolean) {
   emit('update:show', v)
 }

web/src/views/chat/components/AttachmentUploader.vue

@@ -57,6 +57,11 @@ async function upload(opts: UploadCustomRequestOptions) {
     opts.onError()
     return
   }
+  if (f.type.startsWith('audio/') && !props.modelCapabilities?.audio) {
+    msg.error('当前模型不支持音频')
+    opts.onError()
+    return
+  }
   if (f.size > 20 * 1024 * 1024) {
     msg.error('单文件不能超过 20 MB')
     opts.onError()