fix: remove duplicate close button from StoryGallery header, left-align title

src/components/StoryGallery.vue

@@ -198,7 +198,6 @@ const tree = computed(() => buildTreeForChapter(currentChapterId.value))
       <div class="story-header">
         <button class="back-btn" @click="emit('close')">← {{ t('ui.back') }}</button>
         <h2 class="story-title">{{ ch ? t(ch.labelKey || ch.label) : t('ui.story') }}</h2>
-        <button class="icon-btn" @click="emit('close')" title="关闭">✕</button>
       </div>
 
       <div class="story-body">
@@ -310,142 +309,11 @@ const tree = computed(() => buildTreeForChapter(currentChapterId.value))
 }
 
 .story-title {
-  flex: 1;
-  text-align: center;
   font-size: 18px;
   font-weight: 500;
   color: #c9a84c;
   letter-spacing: 4px;
-}
-
-.icon-btn {
-  width: 32px;
-  height: 32px;
-  font-size: 14px;
-  color: #666;
-  background: none;
-  border: 1px solid rgba(255,255,255,0.08);
-  border-radius: 4px;
-  cursor: pointer;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  transition: all 0.15s;
-}
-
-.icon-btn:hover {
-  color: #ccc;
-  border-color: rgba(255,255,255,0.2);
-}
-
-.story-body {
-  flex: 1;
-  min-height: 0;
-  position: relative;
-  overflow: hidden;
-}
-
-.story-body :deep(.tree-flow) {
-  width: 100%;
-  height: 100%;
-  max-height: none;
-}
-
-.story-empty {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  height: 100%;
-  color: #444;
-  font-size: 14px;
-}
-
-.story-footer {
-  display: flex;
-  align-items: center;
-  padding: 12px 20px;
-  flex-shrink: 0;
-  background: rgba(0,0,0,0.5);
-  border-top: 1px solid rgba(255,255,255,0.05);
-}
-
-.footer-left {
-  flex: 1;
-  display: flex;
-  align-items: center;
-  gap: 16px;
-}
-
-.footer-stat {
-  display: flex;
-  align-items: baseline;
-  gap: 4px;
-}
-
-.stat-value {
-  font-size: 18px;
-  font-weight: 600;
-  color: #c9a84c;
-}
-
-.stat-unit {
-  font-size: 12px;
-  color: #666;
-}
-
-.footer-endings {
-  display: flex;
-  gap: 6px;
-}
-
-.ending-chip {
-  padding: 3px 10px;
-  font-size: 11px;
-  color: #555;
-  background: rgba(255,255,255,0.03);
-  border: 1px solid rgba(255,255,255,0.06);
-  border-radius: 12px;
-}
-
-.ending-chip.unlocked {
-  color: #c9a84c;
-  border-color: rgba(201,168,76,0.25);
-  background: rgba(201,168,76,0.06);
-}
-
-.chapter-btn {
-  padding: 8px 20px;
-  font-size: 13px;
-  color: #888;
-  background: rgba(255,255,255,0.04);
-  border: 1px solid rgba(255,255,255,0.1);
-  border-radius: 4px;
-  cursor: pointer;
-  transition: all 0.15s;
-}
-
-.chapter-btn:hover {
-  color: #ccc;
-  background: rgba(255,255,255,0.08);
-}
-
-.chapter-picker {
-  position: fixed;
-  inset: 0;
-  background: rgba(0,0,0,0.9);
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  z-index: 300;
-}
-
-.picker-panel {
-  background: #12121a;
-  border: 1px solid rgba(255,255,255,0.08);
-  border-radius: 12px;
-  padding: 32px 36px;
-  max-width: 700px;
-  width: 90%;
+  margin-left: 16px;
 }
 
 .picker-title {