diff --git a/src/main/services/image-decryption-status-service.ts b/src/main/services/image-decryption-status-service.ts
index 75f92bd..a3ab925 100644
--- a/src/main/services/image-decryption-status-service.ts
+++ b/src/main/services/image-decryption-status-service.ts
@@ -17,7 +17,9 @@ import { isWechatRunning } from './wechat-process-status'
 export async function inspectImageDecryptionStatus(
   config: ImageKeyConfigResult
 ): Promise<ImageDecryptionStatus> {
-  const accountRoot = chat.getCurrentAccountRoot() || config.resourceRoot
+  // 状态面板的"图片资源目录"始终等于当前识别到的微信账号根目录；
+  // 仅在微信未连接时回退到上次配置中的 resourceRoot，避免空白。
+  const accountRoot = chat.getCurrentAccountRoot() || config.resourceRoot || ''
   const imageDirectoryFound = hasImageDirectory(accountRoot)
   const stickerCacheFound =
     fs.existsSync(path.join(accountRoot, 'cache')) ||
@@ -65,7 +67,10 @@ export function testImageDecryption(
       .reverse()
       .find((message) => message.contentData?.type === 'image')
     if (!imageMessage || imageMessage.contentData?.type !== 'image') {
-      return failure('NO_IMAGE_MESSAGE', '所选聊天最近没有可测试的图片消息')
+      return failure(
+        'NO_IMAGE_MESSAGE',
+        '所选聊天最近 300 条消息内没有可测试的图片，请换一个含图片的会话'
+      )
     }
 
     const service = new ImageDecryptService(
@@ -74,26 +79,51 @@ export function testImageDecryption(
       chat.getChatDb()?.getWcdb4Client()
     )
     const image = imageMessage.contentData
-    let filePath = service.findImageFile(image.md5, image.datName, { allowThumbnail: false })
+    // 测试时优先使用用户在下方"图片资源目录"输入框填写的目录；
+    // 找不到再退回默认 accountDir。
+    const testAccountDir = normalized.resourceRoot || undefined
+    let filePath = service.findImageFile(image.md5, image.datName, {
+      allowThumbnail: false,
+      accountDir: testAccountDir
+    })
     if (!filePath)
-      filePath = service.findImageFile(image.md5, image.datName, { allowThumbnail: true })
+      filePath = service.findImageFile(image.md5, image.datName, {
+        allowThumbnail: true,
+        accountDir: testAccountDir
+      })
     if (!filePath) return failure('FILE_NOT_FOUND', '图片文件不存在')
 
     const data = service.decryptImageToBase64(filePath)
     if (!data) {
+      // 三步联动：解密失败 → fileFound/decrypted/readable 都为 false。
       return {
-        ...failure('DECRYPT_FAILED', '无法解析媒体文件'),
-        fileFound: true
+        success: false,
+        code: 'DECRYPT_FAILED',
+        error: '无法解析媒体文件',
+        fileFound: false,
+        decrypted: false,
+        readable: false
       }
     }
     const readable = data.startsWith('data:image/')
+    if (!readable) {
+      // 三步联动：解密成功但字节流不可读 → 前一步打勾（确实找到了 dat），
+      // 但 decrypted/readable 全为 false，让 UI 表达"找到但解析失败"。
+      return {
+        success: false,
+        code: 'DECRYPT_FAILED',
+        error: '图片解密结果不可读取',
+        fileFound: true,
+        decrypted: false,
+        readable: false,
+        isThumbnail: service.isThumbnailFile(filePath)
+      }
+    }
     return {
-      success: readable,
-      code: readable ? undefined : 'DECRYPT_FAILED',
-      error: readable ? undefined : '图片解密结果不可读取',
+      success: true,
       fileFound: true,
       decrypted: true,
-      readable,
+      readable: true,
       isThumbnail: service.isThumbnailFile(filePath)
     }
   } catch {
diff --git a/src/main/services/image-key-config-service.ts b/src/main/services/image-key-config-service.ts
index a7bc547..3c54b42 100644
--- a/src/main/services/image-key-config-service.ts
+++ b/src/main/services/image-key-config-service.ts
@@ -92,9 +92,10 @@ export class ImageKeyConfigService {
     if (!result.success || !result.entry) {
       return { ...this.getEmptyConfig(), error: result.error || '图片密钥保存失败' }
     }
+    // 注意：normalized.resourceRoot 不再写回 imageKeyRoot。
+    // 下方的"图片资源目录"输入框仅用于本次手动测试，不再污染状态面板上方显示。
     saveSettings({
       ...settings,
-      imageKeyRoot: normalized.resourceRoot,
       imageXorKey: '',
       imageAesKey: '',
       imageKeyFallbackDisabled: false
@@ -106,7 +107,9 @@ export class ImageKeyConfigService {
       encryptionAvailable: true,
       source: 'secure-storage',
       accountId: context.accountId,
-      resourceRoot: normalized.resourceRoot,
+      // 返回的 resourceRoot 始终是识别到的默认目录，与状态面板一致；
+      // 不返回 normalized.resourceRoot，避免把用户输入的测试目录当成状态写回。
+      resourceRoot: context.resourceRoot,
       xorKey: result.entry.xorKey,
       aesKey: result.entry.aesKey,
       updatedAt: result.entry.updatedAt
diff --git a/src/renderer/src/assets/main.css b/src/renderer/src/assets/main.css
index 1d62bb4..3efe764 100644
--- a/src/renderer/src/assets/main.css
+++ b/src/renderer/src/assets/main.css
@@ -5791,6 +5791,59 @@ body {
   width: 100%;
   margin: 2px 0 0;
 }
+.image-step-list {
+  list-style: none;
+  margin: 14px 0 0;
+  padding: 12px 14px;
+  border-radius: 8px;
+  border: 1px solid #e5ecea;
+  background: #f7faf9;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  font-size: 12px;
+}
+.image-step {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+.image-step-icon {
+  width: 18px;
+  height: 18px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  border-radius: 50%;
+  font-size: 12px;
+  font-weight: 600;
+}
+.image-step-ok .image-step-icon {
+  background: #2e765d;
+  color: #fff;
+}
+.image-step-fail .image-step-icon {
+  background: #a84444;
+  color: #fff;
+}
+.image-step-fail span:last-child {
+  color: #a84444;
+}
+.image-step-pending .image-step-icon {
+  background: #d6dde0;
+  color: #6a7378;
+}
+.image-step-pending span:last-child {
+  color: #98a1a4;
+}
+.image-step-skipped .image-step-icon {
+  background: transparent;
+  color: #b8c0c4;
+}
+.image-step-skipped span:last-child {
+  color: #b8c0c4;
+  text-decoration: line-through;
+}
 .image-inline-error {
   margin: 14px 0 0;
   color: #a84444;
@@ -5829,6 +5882,12 @@ body {
   border-radius: 7px;
   background: #f1f4f3;
 }
+.image-auto-scope-hint {
+  display: inline-block;
+  margin-top: 4px;
+  color: #7d8c8a;
+  font-size: 11px;
+}
 .image-auto-unavailable {
   padding-top: 20px;
   padding-bottom: 20px;
diff --git a/src/renderer/src/features/settings/image-decryption/AutoDetectImageKeySection.tsx b/src/renderer/src/features/settings/image-decryption/AutoDetectImageKeySection.tsx
index c89b7bd..0cc50dd 100644
--- a/src/renderer/src/features/settings/image-decryption/AutoDetectImageKeySection.tsx
+++ b/src/renderer/src/features/settings/image-decryption/AutoDetectImageKeySection.tsx
@@ -45,6 +45,10 @@ export function AutoDetectImageKeySection({
             {state.status.platform === 'darwin'
               ? '扫描本机微信缓存并通过图片模板验证候选密钥。'
               : '扫描微信进程内存并通过本地图片模板验证候选密钥。'}
+            <br />
+            <small className="image-auto-scope-hint">
+              仅支持 WeChat 4.0，V3 及以下无法解析
+            </small>
           </p>
         </div>
         <button
diff --git a/src/renderer/src/features/settings/image-decryption/ImageKeyConfiguration.tsx b/src/renderer/src/features/settings/image-decryption/ImageKeyConfiguration.tsx
index b879331..5bb1929 100644
--- a/src/renderer/src/features/settings/image-decryption/ImageKeyConfiguration.tsx
+++ b/src/renderer/src/features/settings/image-decryption/ImageKeyConfiguration.tsx
@@ -7,19 +7,10 @@ export function ImageKeyConfiguration({
 }: {
   state: ImageDecryptionState
   disabled: boolean
-  onEdit: (field: 'resourceRoot' | 'xorKey' | 'aesKey', value: string) => void
+  onEdit: (field: 'xorKey' | 'aesKey', value: string) => void
 }): React.ReactElement {
   return (
     <section className="settings-card image-key-editor">
-      <label>
-        <span>图片资源目录</span>
-        <input
-          value={state.resourceRoot}
-          disabled={disabled}
-          title={state.resourceRoot}
-          onChange={(event) => onEdit('resourceRoot', event.target.value)}
-        />
-      </label>
       <div className="image-key-grid">
         <label>
           <span>XOR Key</span>
diff --git a/src/renderer/src/features/settings/image-decryption/ImageTestSection.tsx b/src/renderer/src/features/settings/image-decryption/ImageTestSection.tsx
index 2b59d5e..78e4ac0 100644
--- a/src/renderer/src/features/settings/image-decryption/ImageTestSection.tsx
+++ b/src/renderer/src/features/settings/image-decryption/ImageTestSection.tsx
@@ -1,5 +1,58 @@
 import type { ImageDecryptionState } from './types'
 
+type StepState = 'pending' | 'ok' | 'fail' | 'skipped'
+
+function stepClass(step: StepState): string {
+  switch (step) {
+    case 'ok':
+      return 'image-step image-step-ok'
+    case 'fail':
+      return 'image-step image-step-fail'
+    case 'skipped':
+      return 'image-step image-step-skipped'
+    default:
+      return 'image-step image-step-pending'
+  }
+}
+
+function stepIcon(step: StepState): string {
+  switch (step) {
+    case 'ok':
+      return '✓'
+    case 'fail':
+      return '×'
+    case 'skipped':
+      return '·'
+    default:
+      return '○'
+  }
+}
+
+function pickSteps(result: {
+  fileFound: boolean
+  decrypted: boolean
+  readable: boolean
+  success: boolean
+}): { find: StepState; decrypt: StepState; read: StepState } {
+  // 三步严格联动：找到失败 → 解密/读取 skipped；解密失败 → 读取 skipped；
+  // 解密成功但不可读 → 读取 fail。
+  if (!result.fileFound) {
+    return { find: 'fail', decrypt: 'skipped', read: 'skipped' }
+  }
+  if (!result.success && !result.decrypted && !result.readable) {
+    // 后端把 fileFound=false 的情况也用 success:false 表达；
+    // 此时第一步直接 fail，后两步 skip。
+    return { find: 'fail', decrypt: 'skipped', read: 'skipped' }
+  }
+  if (!result.decrypted) {
+    return { find: 'ok', decrypt: 'fail', read: 'skipped' }
+  }
+  if (!result.readable) {
+    return { find: 'ok', decrypt: 'ok', read: 'fail' }
+  }
+  return { find: 'ok', decrypt: 'ok', read: 'ok' }
+}
+
 export function ImageTestSection({
   state,
   disabled,
@@ -16,6 +69,14 @@ export function ImageTestSection({
   onSave: () => void
 }): React.ReactElement {
   const result = state.testResult
+  const steps = result
+    ? pickSteps({
+        fileFound: result.fileFound,
+        decrypted: result.decrypted,
+        readable: result.readable,
+        success: result.success
+      })
+    : null
   return (
     <section className="settings-card image-test-section">
       <div>
@@ -48,16 +109,27 @@ export function ImageTestSection({
           确认保存
         </button>
       </div>
-      {result ? (
-        <div className={`image-test-result ${result.success ? 'success' : 'error'}`}>
-          <span>{result.fileFound ? '✓' : '×'} 找到图片文件</span>
-          <span>{result.decrypted ? '✓' : '×'} 解密成功</span>
-          <span>{result.readable ? '✓' : '×'} 图片可以读取</span>
-          {!result.success ? <p>{result.error}</p> : null}
-        </div>
+      {steps ? (
+        <ol className="image-step-list">
+          <li className={stepClass(steps.find)}>
+            <span className="image-step-icon">{stepIcon(steps.find)}</span>
+            <span>找到图片文件</span>
+          </li>
+          <li className={stepClass(steps.decrypt)}>
+            <span className="image-step-icon">{stepIcon(steps.decrypt)}</span>
+            <span>解密成功</span>
+          </li>
+          <li className={stepClass(steps.read)}>
+            <span className="image-step-icon">{stepIcon(steps.read)}</span>
+            <span>图片可以读取</span>
+          </li>
+        </ol>
       ) : state.error ? (
         <p className="image-inline-error">{state.error}</p>
       ) : null}
+      {result && !result.success && result.error ? (
+        <p className="image-inline-error">{result.error}</p>
+      ) : null}
     </section>
   )
 }
diff --git a/src/renderer/src/features/settings/image-decryption/imageDecryptionReducer.ts b/src/renderer/src/features/settings/image-decryption/imageDecryptionReducer.ts
index 36c6dd9..7378b04 100644
--- a/src/renderer/src/features/settings/image-decryption/imageDecryptionReducer.ts
+++ b/src/renderer/src/features/settings/image-decryption/imageDecryptionReducer.ts
@@ -27,7 +27,11 @@ export function imageDecryptionReducer(
         config: action.config,
         status: action.status,
         contacts: action.contacts,
-        resourceRoot: action.config.resourceRoot,
+        // 下方"图片资源目录"跟随状态面板的默认目录同步；
+        // 一旦用户手动编辑过（dirty），就不再被刷新覆盖。
+        resourceRoot: state.dirty && state.resourceRoot
+          ? state.resourceRoot
+          : action.status.resourceRoot || action.config.resourceRoot,
         xorKey: action.config.xorKey || '0x40',
         aesKey: action.config.aesKey || '',
         error: action.config.success ? undefined : action.config.error,
@@ -126,7 +130,7 @@ export function imageDecryptionReducer(
         config: action.config,
         status: action.status,
         contacts: state.contacts,
-        resourceRoot: action.config.resourceRoot
+        resourceRoot: action.status.resourceRoot || action.config.resourceRoot
       }
     default:
       return state
diff --git a/src/renderer/src/features/settings/image-decryption/types.ts b/src/renderer/src/features/settings/image-decryption/types.ts
index bedb6f2..2121469 100644
--- a/src/renderer/src/features/settings/image-decryption/types.ts
+++ b/src/renderer/src/features/settings/image-decryption/types.ts
@@ -53,7 +53,7 @@ export type ImageDecryptionAction =
       contacts: Contact[]
     }
   | { type: 'LOAD_ERROR'; error: string }
-  | { type: 'EDIT'; field: 'resourceRoot' | 'xorKey' | 'aesKey'; value: string }
+  | { type: 'EDIT'; field: 'xorKey' | 'aesKey'; value: string }
   | { type: 'SELECT_CHAT'; userMd5: string }
   | { type: 'TEST_START' }
   | { type: 'TEST_DONE'; result: ImageDecryptionTestResult }
@@ -80,7 +80,7 @@ export interface ImageDecryptionController {
   pageStatus: 'configured' | 'unconfigured' | 'partial'
   busy: boolean
   canSave: boolean
-  edit: (field: 'resourceRoot' | 'xorKey' | 'aesKey', value: string) => void
+  edit: (field: 'xorKey' | 'aesKey', value: string) => void
   selectChat: (userMd5: string) => void
   test: () => Promise<void>
   save: () => Promise<void>
diff --git a/src/renderer/src/features/settings/image-decryption/useImageDecryptionController.ts b/src/renderer/src/features/settings/image-decryption/useImageDecryptionController.ts
index 6582bc4..033af85 100644
--- a/src/renderer/src/features/settings/image-decryption/useImageDecryptionController.ts
+++ b/src/renderer/src/features/settings/image-decryption/useImageDecryptionController.ts
@@ -33,7 +33,7 @@ export function useImageDecryptionController({
     })
   }, [refresh])
 
-  const edit = useCallback((field: 'resourceRoot' | 'xorKey' | 'aesKey', value: string): void => {
+  const edit = useCallback((field: 'xorKey' | 'aesKey', value: string): void => {
     dispatch({ type: 'EDIT', field, value })
   }, [])
 
@@ -84,12 +84,17 @@ export function useImageDecryptionController({
     dispatch({ type: 'AUTO_START' })
     const result = await window.api.autoGetImageKey({ save: false })
     if (!result.success || !result.aesKey || !result.verified) {
-      dispatch({
-        type: 'AUTO_ERROR',
-        error: result.success
-          ? '获取到候选密钥，但未通过图片验证'
-          : sanitizeImageError(result.error)
-      })
+      // 自动获取链路：原文透传后端错误信息，不要走 sanitizeImageError。
+      // sanitizeImageError 是给"测试图片解析"设计的字典，会把
+      // "未找到 V2 模板文件 / 微信进程未运行 / 60 秒未扫描到密钥" 等
+      // 完全合法的扫描阶段错误强制翻成"无法解析媒体文件"。
+      const rawError = (result.error || '').toString().trim()
+      const errorMessage = !result.success
+        ? rawError || '自动获取图片密钥失败'
+        : !result.aesKey
+          ? '自动获取未返回 AES 密钥'
+          : '获取到候选密钥，但未通过图片验证'
+      dispatch({ type: 'AUTO_ERROR', error: errorMessage })
       return
     }
     dispatch({
diff --git a/src/renderer/src/features/settings/image-decryption/utils.ts b/src/renderer/src/features/settings/image-decryption/utils.ts
index 21e5785..2ec6645 100644
--- a/src/renderer/src/features/settings/image-decryption/utils.ts
+++ b/src/renderer/src/features/settings/image-decryption/utils.ts
@@ -11,11 +11,17 @@ export function formatImageConfigTime(value?: number): string {
 
 export function sanitizeImageError(error?: string): string {
   const value = String(error || '').toLowerCase()
+  if (value.includes('no_image_message') || value.includes('300')) {
+    return '当前会话最近 300 条消息内没有图片，请换一个含图片的聊天再测试'
+  }
+  if (value.includes('unsupported') || value.includes('dat version')) {
+    return '仅支持 WeChat 4.0 图片协议，V3 及以下无法解析'
+  }
   if (value.includes('key') || value.includes('密钥')) return '图片密钥未配置或与当前账号不匹配'
   if (value.includes('不存在') || value.includes('not found')) return '图片文件不存在'
   if (value.includes('账号')) return '当前账号不匹配'
   if (value.includes('目录')) return '图片资源目录不可用'
-  return error ? '无法解析媒体文件' : '图片解析测试未通过'
+  return error ? '无法解析媒体文件（仅支持 WeChat 4.0）' : '图片解析测试未通过'
 }
 
 export function normalizeAutoXorKey(value?: number, formatted?: string): string {