fix: chapter picker slides up from bottom-right, footer details float above bar

src/components/StoryGallery.vue

@@ -374,6 +374,7 @@ const tree = computed(() => buildTreeForChapter(currentChapterId.value))
 }
 
 .footer-left {
+  position: relative;
   flex: 1;
   display: flex;
   flex-direction: column;
@@ -400,9 +401,13 @@ const tree = computed(() => buildTreeForChapter(currentChapterId.value))
 }
 
 .footer-details {
+  position: absolute;
+  bottom: 100%;
+  left: 20px;
   display: flex;
   align-items: center;
   gap: 16px;
+  margin-bottom: 8px;
 }
 
 .footer-stat {
@@ -491,6 +496,21 @@ const tree = computed(() => buildTreeForChapter(currentChapterId.value))
   transform: translateY(8px);
 }
 
+.chapter-picker {
+  position: absolute;
+  bottom: 56px;
+  right: 20px;
+  z-index: 300;
+}
+
+.picker-panel {
+  background: #12121a;
+  border: 1px solid rgba(201,168,76,0.15);
+  border-radius: 12px;
+  padding: 24px 28px;
+  box-shadow: 0 8px 32px rgba(0,0,0,0.6);
+}
+
 .picker-title {
   text-align: center;
   font-size: 20px;
@@ -602,7 +622,12 @@ const tree = computed(() => buildTreeForChapter(currentChapterId.value))
 
 .picker-fade-enter-active,
 .picker-fade-leave-active {
-  transition: opacity 0.2s ease;
+  transition: all 0.2s ease;
+}
+.picker-fade-enter-from,
+.picker-fade-leave-to {
+  opacity: 0;
+  transform: translateY(12px);
 }
 
 .picker-fade-enter-from,