diff --git a/apps/backend/src/services/session/session-proof.js b/apps/backend/src/services/session/session-proof.ts
similarity index 68%
rename from apps/backend/src/services/session/session-proof.js
rename to apps/backend/src/services/session/session-proof.ts
index 1d89df16..c132ce44 100644
--- a/apps/backend/src/services/session/session-proof.js
+++ b/apps/backend/src/services/session/session-proof.ts
@@ -1,10 +1,9 @@
-// @ts-nocheck
-
 import fs from 'node:fs/promises'
 
 import {
   BAIDU_BEIJING_TIME_URL,
   DEFAULT_REDEEM_PROOF_MODE,
+  type RedeemProofMode,
 } from './session-proof-constants.js'
 import { captureBeijingTimeProof } from './session-proof-beijing-time.js'
 import { showResultDialog, composeProofScreenshot } from './session-proof-renderer.js'
@@ -12,6 +11,63 @@ import { resolveRedeemProofMode, shouldCaptureBeijingTimeProof } from './session
 import { buildArtifactPaths } from './session-proof-paths.js'
 import { writeRedeemResultFile } from './session-proof-result-writer.js'
 
+type BrowserPageLike = {
+  evaluate: <T = unknown>(callback: any, arg?: unknown) => Promise<T>
+  waitForTimeout: (milliseconds: number) => Promise<void>
+  setViewportSize: (viewport: { width: number; height: number }) => Promise<void>
+  setContent: (html: string, options?: { waitUntil?: string }) => Promise<unknown>
+  goto: (url: string, options?: { waitUntil?: string }) => Promise<unknown>
+  screenshot: (options: {
+    path: string
+    fullPage?: boolean
+    clip?: { x: number; y: number; width: number; height: number }
+  }) => Promise<unknown>
+  content: () => Promise<string>
+  close: () => Promise<void>
+}
+
+type BrowserContextLike = {
+  newPage: () => Promise<BrowserPageLike>
+}
+
+type RedeemFinalResult = {
+  role?: {
+    area?: string
+  }
+  classification?: {
+    success?: boolean
+  }
+  redeem?: {
+    iRet?: number | string
+    ret?: number | string
+    sMsg?: string
+  }
+  [key: string]: unknown
+}
+
+type RedeemArtifactsInput = {
+  browserContext: BrowserContextLike
+  page: BrowserPageLike
+  sessionDir: string
+  sessionId?: string
+  activityUrl: string
+  code: string
+  finalResult: RedeemFinalResult
+  attempts?: unknown[]
+}
+
+type WriteRedeemArtifactFilesInput = Omit<RedeemArtifactsInput, 'sessionDir'> & {
+  outputDir: string
+  proofMode?: RedeemProofMode | string
+}
+
+type RedeemArtifactsResult = {
+  proofMode: RedeemProofMode
+  screenshotPath: string
+  htmlPath: string
+  resultPath: string
+}
+
 export async function saveRedeemArtifacts({
   browserContext,
   page,
@@ -21,7 +77,7 @@ export async function saveRedeemArtifacts({
   code,
   finalResult,
   attempts,
-}) {
+}: RedeemArtifactsInput): Promise<RedeemArtifactsResult> {
   return writeRedeemArtifactFiles({
     browserContext,
     page,
@@ -45,7 +101,7 @@ export async function writeRedeemArtifactFiles({
   finalResult,
   attempts,
   proofMode = DEFAULT_REDEEM_PROOF_MODE,
-}) {
+}: WriteRedeemArtifactFilesInput): Promise<RedeemArtifactsResult> {
   const effectiveProofMode = resolveRedeemProofMode(proofMode)
   const {
     redeemPageScreenshotPath,
@@ -88,7 +144,11 @@ export async function writeRedeemArtifactFiles({
 
   await page.screenshot({ path: redeemPageScreenshotPath, fullPage: true })
 
-  let beijingTimeProof = {
+  let beijingTimeProof: {
+    screenshotPath: string
+    pageUrl: string
+    error?: string
+  } = {
     screenshotPath: '',
     pageUrl: BAIDU_BEIJING_TIME_URL,
     error: '',
diff --git a/docs/backend-typescript-migration-plan.md b/docs/backend-typescript-migration-plan.md
index 5b2f5c47..95321827 100644
--- a/docs/backend-typescript-migration-plan.md
+++ b/docs/backend-typescript-migration-plan.md
@@ -418,6 +418,14 @@
     - `npm run typecheck`
     - `npm run build`
     - `npm test` 共 139 个用例通过
+80. 腾讯浏览器会话 proof 总编排迁移到 `.ts`：
+    - `src/services/session/session-proof.ts`
+81. 兑换凭证保存入口、基础 / 完整 proof 分支、北京时间截图降级路径、artifact 返回值已显式类型化
+82. Docker 内验证通过：
+    - `src/services/session/session-proof.test.js` 共 4 个用例通过
+    - `npm run typecheck`
+    - `npm run build`
+    - `npm test` 共 139 个用例通过
 
 ## 下一步建议