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/FirstSongSlide.vue

@@ -74,7 +74,7 @@ const formatDate = (dateStr) => {
   align-items: center;
   justify-content: center;
   overflow: hidden;
-  background-color: #000;
+  background-color: var(--bg-primary, #111111);
 }
 
 .bg-blur {
@@ -120,7 +120,7 @@ const formatDate = (dateStr) => {
 }
 
 .highlight {
-  color: #fff;
+  color: var(--text-primary, #ffffff);
   font-weight: 700;
   margin: 0 0.5rem;
 }
@@ -141,7 +141,7 @@ const formatDate = (dateStr) => {
   overflow: hidden;
   box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
   border: 1px solid rgba(255, 255, 255, 0.1);
-  background: #111827;
+  background: var(--bg-secondary, #111827);
   display: flex;
   align-items: center;
   justify-content: center;
@@ -181,7 +181,7 @@ const formatDate = (dateStr) => {
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
-  color: #fff;
+  color: var(--text-primary, #ffffff);
 }
 
 .song-artist {