refactor: rename wait_for_approval to ask_user

More general-purpose user intervention tool — not just approve/reject,
but any question or input request. Renames across Rust backend, Vue
frontend, prompts, and status strings.

Tool: wait_for_approval → ask_user (param: reason → question)
Status: WaitingApproval → WaitingUser, waiting_approval → waiting_user
Enum: NeedsApproval → NeedsInput

web/src/components/CommentSection.vue

@@ -4,7 +4,7 @@ import { ref, nextTick } from 'vue'
 const props = defineProps<{
   disabled?: boolean
   quotes: string[]
-  waitingApproval?: boolean
+  waitingUser?: boolean
 }>()
 
 const emit = defineEmits<{
@@ -66,9 +66,9 @@ defineExpose({ focusInput })
 </script>
 
 <template>
-  <div class="comment-section" :class="{ 'waiting-approval': waitingApproval }">
-    <div v-if="waitingApproval" class="approval-banner">
-      ⏳ Agent 正在等待你的确认
+  <div class="comment-section" :class="{ 'waiting-user': waitingUser }">
+    <div v-if="waitingUser" class="approval-banner">
+      ⏳ Agent 正在等待你的回复
     </div>
     <div v-if="quotes.length" class="quotes-bar">
       <div v-for="(q, i) in quotes" :key="i" class="quote-chip">
@@ -80,11 +80,11 @@ defineExpose({ focusInput })
       <textarea
         ref="textareaRef"
         v-model="input"
-        :placeholder="waitingApproval ? '可选：附加反馈或修改意见...' : (quotes.length ? '添加你的评论...' : '输入反馈或调整指令... (Ctrl+Enter 发送)')"
+        :placeholder="waitingUser ? '输入回复或反馈...' : (quotes.length ? '添加你的评论...' : '输入反馈或调整指令... (Ctrl+Enter 发送)')"
         rows="3"
         @keydown="onKeydown"
       />
-      <div v-if="waitingApproval" class="approval-buttons">
+      <div v-if="waitingUser" class="approval-buttons">
         <button class="btn-approve" @click="approve">继续执行</button>
         <button class="btn-reject" @click="reject">终止</button>
       </div>
@@ -101,7 +101,7 @@ defineExpose({ focusInput })
   overflow: hidden;
 }
 
-.comment-section.waiting-approval {
+.comment-section.waiting-user {
   border-color: var(--accent);
   box-shadow: 0 0 0 1px var(--accent), 0 0 12px rgba(79, 195, 247, 0.15);
 }

web/src/components/ExecutionSection.vue

@@ -65,7 +65,7 @@ const workflowStatusLabel = computed(() => {
     case 'executing': return '执行中'
     case 'done': return '已完成'
     case 'failed': return '失败'
-    case 'waiting_approval': return '等待确认'
+    case 'waiting_user': return '等待用户'
     default: return props.workflowStatus
   }
 })
@@ -364,7 +364,7 @@ watch(logItems, () => {
   color: #fff;
 }
 
-.workflow-badge.waiting_approval {
+.workflow-badge.waiting_user {
   background: #ff9800;
   color: #fff;
 }

web/src/components/WorkflowView.vue

@@ -208,7 +208,7 @@ async function onSubmitComment(text: string) {
       ref="commentRef"
       :disabled="!workflow"
       :quotes="quotes"
-      :waitingApproval="workflow?.status === 'waiting_approval'"
+      :waitingUser="workflow?.status === 'waiting_user'"
       @submit="onSubmitComment"
       @removeQuote="removeQuote"
     />

web/src/types.ts

@@ -10,7 +10,7 @@ export interface Workflow {
   id: string
   project_id: string
   requirement: string
-  status: 'pending' | 'planning' | 'executing' | 'waiting_approval' | 'done' | 'failed'
+  status: 'pending' | 'planning' | 'executing' | 'waiting_user' | 'done' | 'failed'
   created_at: string
   report: string
 }