diff --git a/apps/api/app/api/routes/upload.py b/apps/api/app/api/routes/upload.py
index c67add1eb..687c0db8f 100644
--- a/apps/api/app/api/routes/upload.py
+++ b/apps/api/app/api/routes/upload.py
@@ -206,6 +206,7 @@ async def complete_direct_upload(
                 ingest_job_id="",
                 duplicated=True,
                 asset_id=existing.id,
+                url=storage_service.get_url(normalized_key),
             )
 
     job = _submit_ingest_job(
@@ -215,7 +216,7 @@ async def complete_direct_upload(
         ingest_job_repository=ingest_job_repository,
         file_hash=request.file_hash,
     )
-    return DirectUploadCompleteResponse(storage_key=normalized_key, ingest_job_id=job.id)
+    return DirectUploadCompleteResponse(storage_key=normalized_key, ingest_job_id=job.id, url=storage_service.get_url(normalized_key))
 
 
 @router.post(
diff --git a/apps/api/app/schemas/upload.py b/apps/api/app/schemas/upload.py
index b9763606c..c6d798288 100644
--- a/apps/api/app/schemas/upload.py
+++ b/apps/api/app/schemas/upload.py
@@ -39,6 +39,7 @@ class DirectUploadCompleteResponse(BaseModel):
     ingest_job_id: str
     duplicated: bool = Field(default=False, description="是否为重复素材（命中去重）")
     asset_id: str = Field(default="", description="重复素材的 asset_id（duplicated=true 时返回）")
+    url: str = Field(default="", description="Public URL of uploaded file")
 
 
 class UploadAssetResponse(BaseModel):
diff --git a/apps/web/src/api/assets/index.ts b/apps/web/src/api/assets/index.ts
index ba460863d..5c536f2c2 100644
--- a/apps/web/src/api/assets/index.ts
+++ b/apps/web/src/api/assets/index.ts
@@ -13,7 +13,6 @@ export type {
   ClassificationJob,
   AssetDiagnosis,
   BatchOperationResult,
-  UploadResult,
   DirectUploadPrepareResult,
   DirectUploadCompleteResult,
 } from "./types"
@@ -40,7 +39,7 @@ export {
 } from "./assets"
 
 // 上传
-export { uploadAsset, prepareDirectUpload, completeDirectUpload, uploadAssetDirect } from "./upload"
+export { prepareDirectUpload, completeDirectUpload, uploadAssetDirect } from "./upload"
 
 // 任务
 export { getIngestJob, submitClassificationJob, getClassificationJob } from "./jobs"
diff --git a/apps/web/src/api/assets/types.ts b/apps/web/src/api/assets/types.ts
index 9e64a942e..e98274a18 100644
--- a/apps/web/src/api/assets/types.ts
+++ b/apps/web/src/api/assets/types.ts
@@ -135,4 +135,5 @@ export interface DirectUploadPrepareResult {
 export interface DirectUploadCompleteResult {
   storage_key: string
   ingest_job_id: string
+  url: string
 }
diff --git a/apps/web/src/api/assets/upload.ts b/apps/web/src/api/assets/upload.ts
index 874861f1f..12304db42 100644
--- a/apps/web/src/api/assets/upload.ts
+++ b/apps/web/src/api/assets/upload.ts
@@ -3,16 +3,7 @@
  */
 import apiClient from "../client"
 import { getOrCreateDefaultProject } from "../projects"
-import type { UploadResult, DirectUploadPrepareResult, DirectUploadCompleteResult } from "./types"
-
-/** 表单上传素材（小文件） */
-export const uploadAsset = async (formData: FormData): Promise<UploadResult> => {
-  const response = await apiClient.post("/upload", formData, {
-    headers: { "Content-Type": "multipart/form-data" },
-    timeout: 30 * 60 * 1000,
-  })
-  return response.data
-}
+import type { DirectUploadPrepareResult, DirectUploadCompleteResult } from "./types"
 
 /** 预签名直传准备 */
 export const prepareDirectUpload = async (data: {
diff --git a/apps/web/src/components/voice/CloneModal/index.tsx b/apps/web/src/components/voice/CloneModal/index.tsx
index 5aab11555..28f2beee9 100644
--- a/apps/web/src/components/voice/CloneModal/index.tsx
+++ b/apps/web/src/components/voice/CloneModal/index.tsx
@@ -1,7 +1,8 @@
 import React, { useState, useCallback, useRef, useEffect } from "react"
 import { Modal, Button } from "@/components/ui"
 import { createVoiceClone, toVoiceClone } from "@/api/voice-clone"
-import { uploadAsset } from "@/api/assets"
+import { uploadAssetDirect, ensureDefaultLibrary } from "@/api/assets"
+import { getOrCreateDefaultProject } from "@/api/projects"
 import { PROGRESS_STEPS, ACCEPTED_MIME } from "./constants"
 import { validateFile } from "./utils"
 import { useAudioRecorder } from "./hooks/useAudioRecorder"
@@ -181,9 +182,15 @@ const CloneModal: React.FC<CloneModalProps> = ({ open, onClose, onSuccess }) =>
         })
       }
 
-      const formData = new FormData()
-      formData.append("file", fileToUpload)
-      const uploadResult = await uploadAsset(formData)
+      // 获取默认项目和素材库
+      const project = await getOrCreateDefaultProject()
+      const library = await ensureDefaultLibrary({ project_id: project.id, kind: "voice" })
+
+      // 直传到 OSS
+      const uploadResult = await uploadAssetDirect({
+        file: fileToUpload,
+        library_id: library.id,
+      })
 
       // 组件已卸载则中止后续操作
       if (!isMountedRef.current) return
diff --git a/apps/web/src/components/voice/hooks/useCloneSubmit.ts b/apps/web/src/components/voice/hooks/useCloneSubmit.ts
index f578f5fe2..dd38e52cc 100755
--- a/apps/web/src/components/voice/hooks/useCloneSubmit.ts
+++ b/apps/web/src/components/voice/hooks/useCloneSubmit.ts
@@ -1,6 +1,6 @@
 import { useRef, useCallback, useEffect } from "react"
 import { createVoiceClone, toVoiceClone } from "@/api/voice-clone"
-import { uploadAsset, ensureDefaultLibrary } from "@/api/assets"
+import { uploadAssetDirect, ensureDefaultLibrary } from "@/api/assets"
 import { getOrCreateDefaultProject } from "@/api/projects"
 import type { VoiceClone } from "@/api/voice-clone"
 
@@ -62,15 +62,15 @@ export function useCloneSubmit({
         })
       }
 
-      // 获取默认项目和素材库（后端 /upload 接口必填）
+      // 获取默认项目和素材库
       const project = await getOrCreateDefaultProject()
       const library = await ensureDefaultLibrary({ project_id: project.id, kind: "voice" })
 
-      const formData = new FormData()
-      formData.append("file", fileToUpload)
-      formData.append("project_id", project.id)
-      formData.append("library_id", library.id)
-      const uploadResult = await uploadAsset(formData)
+      // 直传到 OSS
+      const uploadResult = await uploadAssetDirect({
+        file: fileToUpload,
+        library_id: library.id,
+      })
 
       // 阶段 2：克隆
       setPhase("cloning")
diff --git a/apps/web/src/test/api/assets.test.ts b/apps/web/src/test/api/assets.test.ts
index 4745fcdf5..71f5788d7 100644
--- a/apps/web/src/test/api/assets.test.ts
+++ b/apps/web/src/test/api/assets.test.ts
@@ -10,7 +10,6 @@ import {
   updateAsset,
   updateAssetReviewStatus,
   deleteAsset,
-  uploadAsset,
   prepareDirectUpload,
   completeDirectUpload,
   uploadAssetDirect,
@@ -222,22 +221,6 @@ describe("assets API", () => {
     })
   })
 
-  describe("uploadAsset", () => {
-    it("should resolve successfully", async () => {
-      await expect(uploadAsset(new FormData())).resolves.not.toThrow()
-    })
-
-    it("should reject on API error", async () => {
-      mockGet.mockRejectedValue(new Error("Network error"))
-      mockPost.mockRejectedValue(new Error("Network error"))
-      mockPut.mockRejectedValue(new Error("Network error"))
-      mockDelete.mockRejectedValue(new Error("Network error"))
-      mockPatch.mockRejectedValue(new Error("Network error"))
-
-      await expect(uploadAsset(new FormData())).rejects.toThrow()
-    })
-  })
-
   describe("prepareDirectUpload", () => {
     it("should resolve successfully", async () => {
       await expect(prepareDirectUpload({ name: "test-item" })).resolves.not.toThrow()
diff --git a/apps/web/src/test/components/voice/CloneModal.test.tsx b/apps/web/src/test/components/voice/CloneModal.test.tsx
index 91847c07c..47fcf8345 100755
--- a/apps/web/src/test/components/voice/CloneModal.test.tsx
+++ b/apps/web/src/test/components/voice/CloneModal.test.tsx
@@ -10,7 +10,9 @@ vi.mock("@/api/voice-clone", () => ({
 }))
 
 vi.mock("@/api/assets", () => ({
-  uploadAsset: vi.fn(),
+  uploadAssetDirect: vi
+    .fn()
+    .mockResolvedValue({ storage_key: "test", ingest_job_id: "test", url: "http://test" }),
 }))
 
 vi.mock("@/components/ui", () => ({