优化

frontend/app/web-gold/src/components/agents/ChatDrawer.vue

@@ -180,7 +180,7 @@ watch(() => props.visible, (val) => {
 
 <template>
   <Sheet :open="visible" @update:open="handleClose">
-    <SheetContent side="right" class="w-[560px] sm:max-w-full p-0 flex flex-col bg-background">
+    <SheetContent side="right" class="w-full sm:w-[560px] p-0 flex flex-col bg-background">
       <!-- Header -->
       <SheetHeader class="shrink-0">
         <ChatDrawerHeader :agent="agent" @history="openHistory" />

frontend/app/web-gold/src/components/agents/HistoryPanel.vue

@@ -954,17 +954,19 @@ watch(() => props.visible, (val) => {
 // ========================================
 @media (max-width: 768px) {
   .history-overlay {
-    padding: 20px;
-    align-items: flex-end;
+    padding: 0;
+    align-items: stretch;
   }
 
   .history-modal {
-    max-height: calc(100vh - 40px);
-    border-radius: 20px 20px 12px 12px;
+    max-width: 100%;
+    max-height: 100vh;
+    height: 100vh;
+    border-radius: 0;
   }
 
   .modal-header {
-    padding: 20px 20px 16px;
+    padding: 16px 20px;
   }
 
   .modal-body {