主流程

web/src/views/projects/components/RequirementChatPanel.vue

@@ -37,6 +37,12 @@
         placeholder="system prompt（已自动注入需求上下文，可修改）"
         :autosize="{ minRows: 4, maxRows: 10 }"
       />
+      <NInput
+        v-model:value="newFirstMessage"
+        type="textarea"
+        placeholder="首条消息（创建后自动发送；留空则只建会话不发送）"
+        :autosize="{ minRows: 1, maxRows: 4 }"
+      />
       <div class="flex justify-end gap-2">
         <NButton
           size="small"
@@ -137,6 +143,10 @@ const PHASE_TITLE: Record<ArtifactPhase, string> = {
   auditing: '评审',
 }
 
+// 新建会话默认首条消息：system prompt 仅随请求下发不产生消息，必须有一条
+// 用户消息才能触发 AI 开始输出，"创建并开始"靠它兑现。
+const DEFAULT_FIRST_MESSAGE = '请开始本阶段工作。'
+
 const props = defineProps<{
   slug: string
   requirement: Requirement
@@ -155,6 +165,7 @@ const conversations = ref<Conversation[]>([])
 const showCreateForm = ref(false)
 const newModelId = ref<string | undefined>(undefined)
 const newSystemPrompt = ref('')
+const newFirstMessage = ref(DEFAULT_FIRST_MESSAGE)
 const creating = ref(false)
 const draft = ref('')
 const scrollEl = ref<HTMLElement | null>(null)
@@ -180,6 +191,7 @@ function openCreateForm() {
     props.requirement,
     props.prevArtifact,
   )
+  newFirstMessage.value = DEFAULT_FIRST_MESSAGE
   showCreateForm.value = true
 }
 
@@ -196,6 +208,8 @@ async function onCreateConversation() {
     showCreateForm.value = false
     await loadConversations()
     await session.openConversation(conv.id)
+    const first = newFirstMessage.value.trim()
+    if (first) await session.sendMessage(first)
   } finally {
     creating.value = false
   }