diff --git a/webui/src/components/MarkdownTextRenderer.tsx b/webui/src/components/MarkdownTextRenderer.tsx
index ff75004a7..aa757ff00 100644
--- a/webui/src/components/MarkdownTextRenderer.tsx
+++ b/webui/src/components/MarkdownTextRenderer.tsx
@@ -6,6 +6,7 @@ import remarkGfm from "remark-gfm";
 import remarkMath from "remark-math";
 
 import { CodeBlock } from "@/components/CodeBlock";
+import { FileReferenceChip, isLikelyFilePath } from "@/components/FileReferenceChip";
 import { cn } from "@/lib/utils";
 
 import "katex/dist/katex.min.css";
@@ -44,6 +45,9 @@ export default function MarkdownTextRenderer({
           );
         }
         const raw = String(kids).replace(/\n$/, "");
+        if (isLikelyFilePath(raw)) {
+          return <FileReferenceChip path={raw} />;
+        }
         /** Plain fenced ``` blocks (no language) & wide one-liners: block monospace, not inline pill. */
         const widePlainBlock = raw.includes("\n") || raw.length > 120;
         if (widePlainBlock) {
diff --git a/webui/src/components/ui/tooltip.tsx b/webui/src/components/ui/tooltip.tsx
index 95f7960c8..d69f12275 100644
--- a/webui/src/components/ui/tooltip.tsx
+++ b/webui/src/components/ui/tooltip.tsx
@@ -11,15 +11,17 @@ const TooltipContent = React.forwardRef<
   React.ElementRef<typeof TooltipPrimitive.Content>,
   React.ComponentPropsWithoutRef<typeof TooltipPrimitive.Content>
 >(({ className, sideOffset = 4, ...props }, ref) => (
-  <TooltipPrimitive.Content
-    ref={ref}
-    sideOffset={sideOffset}
-    className={cn(
-      "z-50 overflow-hidden rounded-md border bg-popover px-3 py-1.5 text-xs text-popover-foreground shadow-md animate-in fade-in-0 zoom-in-95",
-      className,
-    )}
-    {...props}
-  />
+  <TooltipPrimitive.Portal>
+    <TooltipPrimitive.Content
+      ref={ref}
+      sideOffset={sideOffset}
+      className={cn(
+        "z-50 overflow-hidden rounded-md border bg-popover px-3 py-1.5 text-xs text-popover-foreground shadow-md animate-in fade-in-0 zoom-in-95",
+        className,
+      )}
+      {...props}
+    />
+  </TooltipPrimitive.Portal>
 ));
 TooltipContent.displayName = TooltipPrimitive.Content.displayName;
 
diff --git a/webui/src/tests/message-bubble.test.tsx b/webui/src/tests/message-bubble.test.tsx
index 410fbabaf..baae344dc 100644
--- a/webui/src/tests/message-bubble.test.tsx
+++ b/webui/src/tests/message-bubble.test.tsx
@@ -1,4 +1,4 @@
-import { fireEvent, render, screen, waitFor } from "@testing-library/react";
+import { act, fireEvent, render, screen, waitFor } from "@testing-library/react";
 import { describe, expect, it, vi } from "vitest";
 
 import { MessageBubble } from "@/components/MessageBubble";
@@ -179,6 +179,47 @@ describe("MessageBubble", () => {
     expect(screen.getByText("Body line.")).toBeInTheDocument();
   });
 
+  it("renders inline file paths as compact file references", async () => {
+    await import("@/components/MarkdownTextRenderer");
+    const message: UIMessage = {
+      id: "a-file-path",
+      role: "assistant",
+      content:
+        "改动在 `webui/src/components/MarkdownTextRenderer.tsx` 和 `/Users/renxubin/.nanobot/workspace/minecraft-fps/index.html`。",
+      createdAt: Date.now(),
+    };
+
+    try {
+      render(<MessageBubble message={message} />);
+
+      const references = await screen.findAllByTestId("inline-file-path");
+      expect(references).toHaveLength(2);
+      expect(references[0].parentElement).not.toHaveClass("translate-y-[0.08em]");
+      expect(references[0].parentElement).toHaveClass("align-[0.14em]");
+      expect(references[0]).toHaveTextContent("MarkdownTextRenderer.tsx");
+      expect(references[0]).not.toHaveTextContent("webui/src/components");
+      expect(screen.getByText("index.html")).toBeInTheDocument();
+      expect(references[1]).not.toHaveTextContent("/Users/renxubin");
+      expect(references[1]).not.toHaveAttribute("title");
+      expect(references[1]).toHaveAttribute(
+        "aria-label",
+        "/Users/renxubin/.nanobot/workspace/minecraft-fps/index.html",
+      );
+
+      vi.useFakeTimers();
+      fireEvent.pointerMove(references[1].parentElement!);
+      await act(async () => {
+        vi.advanceTimersByTime(500);
+      });
+      const tooltip = screen.getByRole("tooltip");
+      expect(tooltip).toHaveTextContent(
+        "/Users/renxubin/.nanobot/workspace/minecraft-fps/index.html",
+      );
+    } finally {
+      vi.useRealTimers();
+    }
+  });
+
   it("renders assistant image media as a larger generated result", () => {
     const message: UIMessage = {
       id: "a-image",