diff --git a/server/utils/post-media-urls.test.ts b/server/utils/post-media-urls.test.ts
new file mode 100644
index 0000000..5f83ee0
--- /dev/null
+++ b/server/utils/post-media-urls.test.ts
@@ -0,0 +1,34 @@
+import { describe, expect, test } from "bun:test";
+import { extractMediaUrlsFromMarkdown, publicAssetUrlToStorageKey } from "./post-media-urls";
+
+describe("extractMediaUrlsFromMarkdown", () => {
+  test("accepts site-relative /public/assets/ URL", () => {
+    expect(extractMediaUrlsFromMarkdown("![](/public/assets/a.webp)")).toEqual(["/public/assets/a.webp"]);
+  });
+
+  test("accepts absolute URL with same path and normalizes to relative", () => {
+    expect(
+      extractMediaUrlsFromMarkdown("![](https://blog.example.com/public/assets/b.webp)"),
+    ).toEqual(["/public/assets/b.webp"]);
+  });
+
+  test("strips query on relative asset URL", () => {
+    expect(extractMediaUrlsFromMarkdown("![](/public/assets/c.webp?v=1)")).toEqual(["/public/assets/c.webp"]);
+  });
+
+  test("strips query on absolute asset URL via pathname", () => {
+    expect(
+      extractMediaUrlsFromMarkdown("![](https://x.example/public/assets/d.webp?cache=1)"),
+    ).toEqual(["/public/assets/d.webp"]);
+  });
+
+  test("ignores non-asset absolute URLs", () => {
+    expect(extractMediaUrlsFromMarkdown("![](https://evil.com/other.png)")).toEqual([]);
+  });
+});
+
+describe("publicAssetUrlToStorageKey", () => {
+  test("maps normalized path to storage key", () => {
+    expect(publicAssetUrlToStorageKey("/public/assets/z.webp")).toBe("z.webp");
+  });
+});
diff --git a/server/utils/post-media-urls.ts b/server/utils/post-media-urls.ts
index c7a529f..ee667a0 100644
--- a/server/utils/post-media-urls.ts
+++ b/server/utils/post-media-urls.ts
@@ -1,11 +1,25 @@
-import { POST_MEDIA_PUBLIC_PREFIX } from "#server/constants/media";
+import { POST_MEDIA_PUBLIC_PREFIX } from "../constants/media";
 
 const MD_IMG_RE = /!\[[^\]]*]\(([^)]+)\)/g;
 
+function stripQueryHash(path: string): string {
+  return path.split("?")[0]?.split("#")[0] ?? path;
+}
+
+/** 统一为 `/public/assets/<key>`，供 `publicAssetUrlToStorageKey` 与引用同步使用。 */
 function normalizeUrl(raw: string): string {
   const t = raw.trim().replace(/^<|>$/g, "").split(/\s+/)[0] ?? "";
   if (t.startsWith(POST_MEDIA_PUBLIC_PREFIX)) {
-    return t;
+    return stripQueryHash(t);
+  }
+  try {
+    const u = new URL(t);
+    const path = stripQueryHash(u.pathname);
+    if (path.startsWith(POST_MEDIA_PUBLIC_PREFIX)) {
+      return path;
+    }
+  } catch {
+    /* 非绝对 URL */
   }
   return "";
 }