优化: 前端体验批次(Knowledge持久化+流式缓存失效 + dfnodes节点注册 + delta 50ms合批 + MCP schema必填校验+bind_directory对齐)

src/composables/ai/useStreamRenderer.ts

@@ -207,6 +207,12 @@ export function useStreamRenderer(opts: UseStreamRendererOptions) {
     if (rafId !== null) { cancelAnimationFrame(rafId); rafId = null }
   }
 
+  /// 清空实例级块缓存(内容寻址 Map + LRU)。会话切换/开关变化时调用,
+  /// 防旧会话已缓存块被新会话命中(跨会话内容错乱)。仅清缓存,不动 streamingBlocks。
+  function resetStreamCache(): void {
+    _blockCache.clear()
+  }
+
   return {
     mdReady,
     renderMd,
@@ -216,5 +222,6 @@ export function useStreamRenderer(opts: UseStreamRendererOptions) {
     renderStreamingBlocks,
     clearStreamingState,
     cancelPendingRaf,
+    resetStreamCache,
   }
 }