fix(aihr): clarify competency score semantics

frontend/src/views/competency/growth.vue

@@ -24,9 +24,9 @@
 
     <section class="metric-grid">
       <article class="metric-card">
-        <span>AI测评分</span>
+        <span>AI训练综合分</span>
         <strong>{{ profile?.assessmentScore ?? '-' }}</strong>
-        <small>AI辅助参考,人可否决</small>
+        <small>训练参考分，不等于 BRD 五维绩效总分</small>
       </article>
       <article class="metric-card">
         <span>训练画像等级（参考）</span>
@@ -282,7 +282,10 @@ const exportEvidenceCsv = () => {
   profile.value?.growthPath.forEach((stage) =>
     appendCsvRow(rows, 'growth_path', `${stage.level} ${stage.status}`, `${stage.progress}% ${stage.evidence}`)
   );
-  evidence.value.dimensions.forEach((item) => appendCsvRow(rows, 'dimension', item.label, `${item.value} ${item.note}`));
+  evidence.value.dimensions.forEach((item) => {
+    const value = item.value === null || item.value === undefined ? '待采集' : item.value;
+    appendCsvRow(rows, 'dimension', item.label, `${value} ${item.note}`);
+  });
   evidence.value.evidenceItems.forEach((item, index) => appendCsvRow(rows, 'evidence_item', index + 1, item));
   evidence.value.latestRecords.forEach((item) =>
     appendCsvRow(rows, 'latest_record', item.scene, `${item.score} ${item.status} ${item.time} ${item.summary}`)