fix(ui): 批量替换所有组件中残留的硬编码深色值以彻底支持浅色主题

app/components/year-review/MiscSlide.vue

@@ -54,7 +54,7 @@ const formatPlatform = (platform) => {
   align-items: center;
   justify-content: center;
   overflow: hidden;
-  background-color: #111827; /* gray-900 */
+  background-color: var(--bg-secondary, #111827); /* gray-900 */
 }
 
 .bg-gradient {
@@ -63,7 +63,7 @@ const formatPlatform = (platform) => {
   left: 0;
   width: 100%;
   height: 50%;
-  background: linear-gradient(to bottom, #1f2937, transparent);
+  background: linear-gradient(to bottom, var(--bg-secondary, #1f2937), transparent);
   opacity: 0.2;
 }