feat(aihr): add SOP answer thumbs up/down feedback loop

- New aihr_knowledge_answer_feedback table; unique (tenant, query_norm,
  fragment_id) pair keeps submissions idempotent
- POST /api/knowledge/answer-feedback (fragmentIds array), GET pending-review
  list, POST /{id}/review — all under existing auth scope
- Down-voted (question, fragment) pairs are filtered from dbSearch fusion
  results; if filtering empties the hit list the original results are kept
  with an explanatory caution (never degrade to no-answer)
- Feedback table missing/unreachable → filter silently skipped, search
  behavior unchanged (degradation chain preserved)
- SnippetResponse gains optional trailing fragmentId (db hits only; seed
  fallback stays null); mobile sopPanel adds 👍/👎 with locked state after
  submit, up votes auto-marked reviewed to keep the review queue clean

mobile/src/App.vue

@@ -1029,6 +1029,26 @@
             <ol v-if="sopResult.keyPoints?.length" class="digest-points">
               <li v-for="point in sopResult.keyPoints" :key="point">{{ point }}</li>
             </ol>
+            <div class="answer-feedback-actions">
+              <button
+                type="button"
+                aria-label="这条答案有帮助"
+                :class="{ active: sopFeedbackVerdict === 'up' }"
+                :disabled="sopFeedbackSubmitting || !!sopFeedbackVerdict"
+                @click="submitSopFeedback('up')"
+              >
+                👍
+              </button>
+              <button
+                type="button"
+                aria-label="这条答案不准确"
+                :class="{ active: sopFeedbackVerdict === 'down' }"
+                :disabled="sopFeedbackSubmitting || !!sopFeedbackVerdict"
+                @click="submitSopFeedback('down')"
+              >
+                👎
+              </button>
+            </div>
             <div v-if="sopResult.cautions?.length" class="digest-cautions">
               <p v-for="item in sopResult.cautions" :key="item">⚠ {{ item }}</p>
             </div>
@@ -1449,6 +1469,7 @@ interface KnowledgeDoc {
 interface KnowledgeSnippet {
   title: string;
   text: string;
+  fragmentId?: number;
 }
 
 interface KnowledgeRecord {
@@ -1473,6 +1494,8 @@ interface KnowledgeSearchResponse {
   cautions?: string[];
 }
 
+type AnswerFeedbackVerdict = 'up' | 'down';
+
 interface SummaryCardStep {
   label: string;
   desc: string;
@@ -1764,6 +1787,8 @@ const sopQuery = ref('');
 const sopResult = ref<KnowledgeSearchResponse | null>(null);
 const sopLoading = ref(false);
 const sopMessage = ref('');
+const sopFeedbackVerdict = ref<AnswerFeedbackVerdict | ''>('');
+const sopFeedbackSubmitting = ref(false);
 const sopRecording = ref(false);
 const sopAsrBusy = ref(false);
 const sopUseAudioFileFallback = ref(false);
@@ -1805,6 +1830,14 @@ let sopAutoSearchAfterTranscribe = false;
 let mentorScrollRaf = 0;
 let mentorScrollListening = false;
 
+const showToast = (message: string) => {
+  toastMessage.value = message;
+  if (toastTimer) window.clearTimeout(toastTimer);
+  toastTimer = window.setTimeout(() => {
+    toastMessage.value = '';
+  }, 2200);
+};
+
 const mentorImageSrc = `${import.meta.env.BASE_URL}mentor.png`;
 const roleAvatarSrc = computed(() => {
   if (roleKey.value === 'candidate') return `${import.meta.env.BASE_URL}candidate-avatar.png`;
@@ -2123,6 +2156,8 @@ const openSopPanel = () => {
   sopQuery.value = '';
   sopResult.value = null;
   sopMessage.value = '';
+  sopFeedbackVerdict.value = '';
+  sopFeedbackSubmitting.value = false;
   summaryCard.value = null;
   summaryCardMessage.value = '';
   summaryCardOpen.value = false;
@@ -2401,6 +2436,8 @@ const searchSopKnowledge = async () => {
   sopLoading.value = true;
   sopMessage.value = '';
   sopResult.value = null;
+  sopFeedbackVerdict.value = '';
+  sopFeedbackSubmitting.value = false;
   sopSnippetsOpen.value = false;
   expandedSnippets.value = new Set();
   summaryCard.value = null;
@@ -2431,6 +2468,42 @@ const searchSopKnowledge = async () => {
   }
 };
 
+const submitSopFeedback = async (verdict: AnswerFeedbackVerdict) => {
+  if (sopFeedbackSubmitting.value || sopFeedbackVerdict.value || !sopResult.value) return;
+  const fragmentIds = Array.from(new Set(
+    (sopResult.value.snippets || [])
+      .map((item) => item.fragmentId)
+      .filter((id): id is number => typeof id === 'number' && id > 0)
+  ));
+  if (!fragmentIds.length) {
+    showToast('暂无可反馈依据');
+    return;
+  }
+  sopFeedbackSubmitting.value = true;
+  try {
+    await readApi<{ saved: number }>(
+      await fetch('/dev-api/api/knowledge/answer-feedback', {
+        method: 'POST',
+        headers: apiHeaders(),
+        body: JSON.stringify({
+          queryText: sopResult.value.queryText || sopQuery.value,
+          fragmentIds,
+          verdict,
+          category: sopResult.value.category || 'sop',
+          position: '生活顾问',
+          source: 'mobile_sop'
+        })
+      })
+    );
+    sopFeedbackVerdict.value = verdict;
+    showToast(verdict === 'down' ? '已记录,该答案将进入复核' : '感谢反馈');
+  } catch (error) {
+    showToast(error instanceof Error ? error.message : '反馈提交失败');
+  } finally {
+    sopFeedbackSubmitting.value = false;
+  }
+};
+
 const askMentorChip = (query: string) => {
   openSopPanel();
   sopQuery.value = query;
@@ -7170,6 +7243,33 @@ p {
   line-height: 1.5;
 }
 
+.answer-feedback-actions {
+  margin-top: 10px;
+  display: flex;
+  gap: 8px;
+}
+
+.answer-feedback-actions button {
+  width: 40px;
+  height: 40px;
+  border: 1px solid rgba(46, 107, 230, 0.18);
+  border-radius: 12px;
+  background: #ffffff;
+  font-size: 18px;
+  line-height: 1;
+  transition: var(--transition-spring-fast);
+}
+
+.answer-feedback-actions button.active {
+  border-color: rgba(46, 107, 230, 0.55);
+  background: rgba(46, 107, 230, 0.12);
+}
+
+.answer-feedback-actions button:disabled {
+  opacity: 0.68;
+  transform: none;
+}
+
 .digest-cautions {
   margin-top: 10px;
   padding: 8px 10px;