优化: 前端审批队列核验销账+清理无引用CSS变量

src/components/ai/ConflictResolver.vue

@@ -123,7 +123,7 @@ watch(
 }
 .conflict-file--toggle:hover .conflict-filepath,
 .conflict-file--toggle:hover .conflict-toggle-text {
-  color: var(--df-primary);
+  color: var(--df-accent);
 }
 .conflict-arrow {
   display: inline-block;
@@ -159,7 +159,7 @@ watch(
   border-radius: 4px;
   overflow: hidden;
 }
-.diff-panel--a { border-left: 3px solid var(--df-primary); }
+.diff-panel--a { border-left: 3px solid var(--df-accent); }
 .diff-panel--b { border-left: 3px solid var(--df-success); }
 .diff-panel-label {
   font-size: 11px;

src/components/ai/ConversationSidebar.vue

@@ -652,7 +652,7 @@ body.ai-sidebar-resizing * {
   width: 100%;
   height: 18px;
   padding: 0 4px;
-  border: 1px solid var(--df-primary, #4f8cff);
+  border: 1px solid var(--df-accent);
   border-radius: var(--df-radius-sm);
   background: var(--df-bg, #fff);
   outline: none;
@@ -668,7 +668,7 @@ body.ai-sidebar-resizing * {
   width: 6px;
   height: 6px;
   border-radius: 50%;
-  background: var(--df-primary, #4f8cff);
+  background: var(--df-accent);
   flex-shrink: 0;
   animation: ai-conv-gen-pulse 1.4s ease-in-out infinite;
 }