fix: 优化对话压缩和复制功能

- 隐藏前端系统消息块显示
- 修复压缩对话后自动跳转到新对话
- 压缩对话标题改为"原标题 压缩后"
- 复制对话标题改为"原标题 的副本"

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

static/src/app/methods/message.ts

@@ -238,8 +238,12 @@ export const messageMethods = {
             if (response.ok && result.success) {
                 const newId = result.compressed_conversation_id;
                 if (newId) {
-                    this.currentConversationId = newId;
+                    await this.loadConversation(newId, { force: true });
                 }
+
+                this.conversationsOffset = 0;
+                await this.loadConversationsList();
+
                 debugLog('对话压缩完成:', result);
             } else {
                 const message = result.message || result.error || '压缩失败';

static/src/components/chat/ChatArea.vue

@@ -387,7 +387,7 @@ const stackedBlocksEnabled = computed(() => {
   return enabled !== false;
 });
 const filteredMessages = computed(() =>
-  (props.messages || []).filter(m => !(m && m.metadata && m.metadata.system_injected_image))
+  (props.messages || []).filter(m => !(m && m.metadata && m.metadata.system_injected_image) && m.role !== 'system')
 );
 
 const DEFAULT_GENERATING_TEXT = '生成中…';

utils/context_manager.py

@@ -946,10 +946,11 @@ class ContextManager:
             has_images=has_images
         )
 
-        # 复制原对话标题（若存在）
+        # 设置压缩后的对话标题
         if original_title:
             try:
-                self.conversation_manager.update_conversation_title(compressed_conversation_id, original_title)
+                new_title = f"{original_title} 压缩后"
+                self.conversation_manager.update_conversation_title(compressed_conversation_id, new_title)
             except Exception:
                 pass
 
@@ -970,6 +971,7 @@ class ContextManager:
             }
 
         original_messages = deepcopy(conversation_data.get("messages", []) or [])
+        original_title = conversation_data.get("title")
 
         metadata = conversation_data.get("metadata", {})
         resolved_project_path = self._resolve_project_path_from_metadata(metadata)
@@ -1002,6 +1004,14 @@ class ContextManager:
                 self.conversation_manager._save_conversation_file(duplicate_conversation_id, new_data)
                 self.conversation_manager._update_index(duplicate_conversation_id, new_data)
 
+        # 设置复制后的对话标题
+        if original_title:
+            try:
+                new_title = f"{original_title} 的副本"
+                self.conversation_manager.update_conversation_title(duplicate_conversation_id, new_title)
+            except Exception:
+                pass
+
         return {
             "success": True,
             "duplicate_conversation_id": duplicate_conversation_id