diff --git a/dashboard/src/components/chat/MessageList.vue b/dashboard/src/components/chat/MessageList.vue
index 9836d3e09..39d0d6b24 100644
--- a/dashboard/src/components/chat/MessageList.vue
+++ b/dashboard/src/components/chat/MessageList.vue
@@ -145,12 +145,15 @@
                     }}</span>
                     <v-icon
                       v-if="
-                        downloadingFiles.has(part.embedded_file.attachment_id ?? "")
+                        downloadingFiles.has(
+                          part.embedded_file.attachment_id || '',
+                        )
                       "
                       size="small"
                       class="download-icon"
                       >mdi-loading mdi-spin</v-icon
                     >
+
                     <v-icon v-else size="small" class="download-icon"
                       >mdi-download</v-icon
                     >
@@ -504,7 +507,14 @@ export default defineComponent({
                 typeof toolCall.result === "string"
                   ? JSON.parse(toolCall.result)
                   : toolCall.result
-              ) as { results?: Array<{ index: string; url: string; title: string; snippet: string }> };
+              ) as {
+                results?: Array<{
+                  index: string;
+                  url: string;
+                  title: string;
+                  snippet: string;
+                }>;
+              };
 
               if (resultData.results && Array.isArray(resultData.results)) {
                 resultData.results.forEach((item) => {
@@ -557,8 +567,9 @@ export default defineComponent({
         return;
       }
 
-      const messageItems =
-        (this.$refs.messageContainer as HTMLElement | null)?.querySelectorAll(".message-item");
+      const messageItems = (
+        this.$refs.messageContainer as HTMLElement | null
+      )?.querySelectorAll(".message-item");
       let messageIndex = -1;
       if (messageItems) {
         for (let i = 0; i < messageItems.length; i++) {
@@ -614,7 +625,9 @@ export default defineComponent({
 
     // 获取被引用消息的内容
     getReplyContent(messageId: string | number | undefined): string {
-      const replyMsg = this.messages.find((m: ChatRecord) => m.id === messageId);
+      const replyMsg = this.messages.find(
+        (m: ChatRecord) => m.id === messageId,
+      );
       if (!replyMsg) {
         return this.tm("reply.notFound");
       }
@@ -900,8 +913,7 @@ export default defineComponent({
     initCodeCopyButtons(): void {
       this.$nextTick(() => {
         if (this.isUnmounted) return;
-        const container =
-          this.$refs.messageContainer as HTMLElement | null;
+        const container = this.$refs.messageContainer as HTMLElement | null;
         const codeBlocks = container?.querySelectorAll("pre code") || [];
         codeBlocks.forEach((codeBlock) => {
           const pre = codeBlock.parentElement;
@@ -1114,7 +1126,10 @@ export default defineComponent({
 
     // Get input tokens (input_other + input_cached)
     getInputTokens(
-      tokenUsage: { input_other?: number; input_cached?: number } | null | undefined,
+      tokenUsage:
+        | { input_other?: number; input_cached?: number }
+        | null
+        | undefined,
     ): number {
       if (!tokenUsage) return 0;
       return (tokenUsage.input_other || 0) + (tokenUsage.input_cached || 0);
@@ -1154,7 +1169,7 @@ export default defineComponent({
       this.$emit("openRefs", refs);
     },
   },
-};
+});
 </script>
 
 <style scoped>
diff --git a/dashboard/src/components/chat/message_list_comps/MessagePartsRenderer.vue b/dashboard/src/components/chat/message_list_comps/MessagePartsRenderer.vue
index fd566df3c..ed2bbe236 100644
--- a/dashboard/src/components/chat/message_list_comps/MessagePartsRenderer.vue
+++ b/dashboard/src/components/chat/message_list_comps/MessagePartsRenderer.vue
@@ -31,7 +31,9 @@
             {{ tm("actions.toolCallUsed", { name: toolCall.name ?? "" }) }}
             <span style="opacity: 0.6">{{
               toolCall.finished_ts
-                ? formatDuration((toolCall.finished_ts ?? 0) - (toolCall.ts ?? 0))
+                ? formatDuration(
+                    (toolCall.finished_ts ?? 0) - (toolCall.ts ?? 0),
+                  )
                 : getElapsedTime(toolCall.ts ?? 0)
             }}</span>
             <v-icon
@@ -178,11 +180,7 @@
             renderPart.part?.embedded_file?.filename
           }}</span>
           <v-icon
-            v-if="
-              downloadingFiles?.has(
-                renderPart.part?.embedded_file?.attachment_id ?? "",
-              )
-            "
+            v-if="isFileDownloading(renderPart)"
             size="small"
             class="download-icon"
             >mdi-loading mdi-spin</v-icon
@@ -235,7 +233,8 @@ const emitDownloadFile = (file: unknown): void => {
   emit("download-file", file);
 };
 
-const isMarkdownCodeFence = (text: string): boolean => /^(```|~~~)/.test(text.trim());
+const isMarkdownCodeFence = (text: string): boolean =>
+  /^(```|~~~)/.test(text.trim());
 
 const looksLikeStandaloneHtml = (text: string): boolean => {
   const normalized = text.trim();
@@ -303,11 +302,44 @@ const isIPythonTool = (toolCall: { name?: string }): boolean => {
   );
 };
 
-interface PendingToolCall { name?: string; finished_ts?: number; ts?: number; id?: string; args?: unknown; result?: unknown; [key: string]: unknown }
+interface PendingToolCall {
+  name?: string;
+  finished_ts?: number;
+  ts?: number;
+  id?: string;
+  args?: unknown;
+  result?: unknown;
+  [key: string]: unknown;
+}
 
-const getRenderParts = (messageParts: MessagePart[]): Array<{ type: string; toolCalls?: PendingToolCall[]; toolCall?: PendingToolCall; part?: MessagePart; key?: string }> => {
+const isFileDownloading = (renderPart: {
+  type: string;
+  part?: { embedded_file?: { attachment_id?: string } };
+}): boolean => {
+  const downloadSet = props.downloadingFiles;
+  if (!downloadSet) return false;
+  const attachmentId = renderPart?.part?.embedded_file?.attachment_id;
+  if (!attachmentId) return false;
+  return downloadSet.has(attachmentId);
+};
+
+const getRenderParts = (
+  messageParts: MessagePart[],
+): Array<{
+  type: string;
+  toolCalls?: PendingToolCall[];
+  toolCall?: PendingToolCall;
+  part?: MessagePart;
+  key?: string;
+}> => {
   if (!Array.isArray(messageParts)) return [];
-  const rendered: Array<{ type: string; toolCalls?: PendingToolCall[]; toolCall?: PendingToolCall; part?: MessagePart; key?: string }> = [];
+  const rendered: Array<{
+    type: string;
+    toolCalls?: PendingToolCall[];
+    toolCall?: PendingToolCall;
+    part?: MessagePart;
+    key?: string;
+  }> = [];
   let pendingToolCalls: PendingToolCall[] = [];
   let groupIndex = 0;