fix: 修复自由创作首尾帧上传人脸图不通过问题

core/frontend/src/free-create-page.css

@@ -220,10 +220,11 @@
   align-items: center;
   justify-content: center;
 }
-.fc-ref:hover .fc-ref-x, .fc-kf-slot:hover .fc-ref-x { display: inline-flex; }
+.fc-ref:hover .fc-ref-x, .fc-kf-slot-wrap:hover .fc-ref-x { display: inline-flex; }
 
 /* 首尾帧(keyframe) */
 .fc-keyframes { display: flex; align-items: center; gap: 8px; }
+.fc-kf-slot-wrap { position: relative; width: 88px; height: 66px; flex: 0 0 auto; }
 .fc-kf-slot {
   position: relative;
   width: 88px;
@@ -242,10 +243,25 @@
   overflow: hidden;
   transition: border-color 0.2s, color 0.2s;
 }
+.fc-kf-slot-wrap > .fc-kf-slot { width: 100%; height: 100%; }
 .fc-kf-slot:hover { border-color: var(--heat-40); color: var(--heat); }
-.fc-kf-slot.filled { border-style: solid; border-color: var(--border-faint); cursor: default; }
+.fc-kf-slot.filled { border-style: solid; border-color: var(--border-faint); }
 .fc-kf-slot img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
 .fc-kf-slot .spinner { position: absolute; }
+.fc-kf-lib {
+  position: absolute;
+  inset: 0;
+  width: 100%;
+  height: 100%;
+  border: none;
+  border-radius: var(--r-md);
+  background: transparent;
+  color: transparent;
+  cursor: pointer;
+  opacity: 0;
+  z-index: 1;
+}
+.fc-kf-slot-wrap > .fc-ref-x { z-index: 2; }
 .fc-kf-tag {
   position: absolute;
   left: 3px;
@@ -488,7 +504,7 @@
 .fc-player-actions { display: flex; gap: 8px; margin-top: 4px; flex-wrap: wrap; }
 
 /* —— 素材库弹窗 —— */
-.fc-lib-modal { width: min(720px, 92vw); }
+.fc-lib-modal { width: min(720px, 92vw); max-width: min(720px, 92vw); }
 .fc-lib-body { max-height: 60vh; overflow-y: auto; }
 .fc-lib-back {
   display: inline-flex;