fix: make table scrollbar always visible instead of hover-only

The global CSS makes all scrollbars transparent by default (only visible
on hover). For table containers, scrollbars should always be visible so
users know the content is scrollable.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/cmd/server/VERSION

@@ -1 +1 @@
-0.1.93.14
+0.1.93.15

frontend/src/style.css

@@ -57,6 +57,20 @@
   ::selection {
     @apply bg-primary-500/20 text-primary-900 dark:text-primary-100;
   }
+
+  /* 表格滚动容器：始终显示滚动条，不跟随全局悬停策略 */
+  .table-wrapper {
+    scrollbar-color: rgba(156, 163, 175, 0.5) transparent;
+  }
+  .dark .table-wrapper {
+    scrollbar-color: rgba(75, 85, 99, 0.5) transparent;
+  }
+  .table-wrapper::-webkit-scrollbar-thumb {
+    @apply rounded-full bg-gray-300/50;
+  }
+  .dark .table-wrapper::-webkit-scrollbar-thumb {
+    @apply rounded-full bg-gray-600/50;
+  }
 }
 
 @layer components {