diff --git a/internal/web/ui/assets/style.css b/internal/web/ui/assets/style.css
index cf79a32..76ce44d 100644
--- a/internal/web/ui/assets/style.css
+++ b/internal/web/ui/assets/style.css
@@ -204,6 +204,8 @@ textarea{min-height:140px;line-height:1.55}
 .msg{background:var(--surface-soft);border:1px solid var(--border-strong);color:var(--green)}
 .error{background:var(--danger-soft);border:1px solid var(--danger-soft-hover);color:var(--danger-soft-text)}
 
+.inline-form{display:inline-flex;margin:0;padding:0}
+
 .stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
 .stat{padding:14px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}
 .stat .k{font-size:12px;color:var(--muted)}
diff --git a/internal/web/ui/templates/face_gallery.html b/internal/web/ui/templates/face_gallery.html
index 4170f7c..8d886ef 100644
--- a/internal/web/ui/templates/face_gallery.html
+++ b/internal/web/ui/templates/face_gallery.html
@@ -16,11 +16,14 @@
       <input type="search" id="person-search" class="input" placeholder="搜索人员..." style="width:180px" oninput="filterPersons()">
       <button class="btn secondary" type="button" onclick="showImport()">批量导入</button>
       <button class="btn" type="button" onclick="showAdd()">新增人员</button>
-      <form method="post" action="/face-gallery/build" style="display:inline" onsubmit="return confirm('确认从已导入的照片构建人脸库？')">
-        <button class="btn" type="submit">构建人脸库</button>
+      {{$built := false}}{{range .StandardResources}}{{if eq .ResourceType "face_gallery"}}{{$built = true}}{{end}}{{end}}
+      <form method="post" action="/face-gallery/build" class="inline-form" {{if $built}}onsubmit="return confirm('已存在构建记录，重新构建将覆盖。确定继续？')"{{else}}onsubmit="return confirm('确认从已导入的照片构建人脸库？')"{{end}}>
+        <button class="btn {{if $built}}secondary{{end}}" type="submit">{{if $built}}重新构建人脸库{{else}}构建人脸库{{end}}</button>
       </form>
     </div>
   </div>
+  {{if .Message}}<div class="msg {{if .Error}}error{{end}}">{{.Message}}</div>{{end}}
+  {{if .Error}}<div class="error">{{.Error}}</div>{{end}}
   {{if .FaceGalleryPersons}}
   <div class="person-grid" style="display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;margin-top:12px">
     {{range .FaceGalleryPersons}}