feat: 完成 TraceMemo v2.2.0 品牌身份与数据迁移升级

- 将 WechatExplorer 产品身份升级为 TraceMemo
- 更新 appId、Runtime Identity、Reader Skill 和 API 环境变量
- 增加旧用户数据、Knowledge、Token 与 AI Provider 安全迁移
- 保留 Windows WeFlow 和旧版配置兼容
- 完善首次启动迁移测试及 v2.2.0 发布文档
- 移除 macOS Intel x64 构建与发布支持

services/wechat-connector/ilink/auth.go

@@ -78,13 +78,40 @@ func PollQRStatus(ctx context.Context, qrcode string, onStatus func(status strin
 	}
 }
 
-// AccountsDir returns the directory where account credentials are stored.
-func AccountsDir() (string, error) {
+func accountsDir(rootName string) (string, error) {
 	home, err := os.UserHomeDir()
 	if err != nil {
 		return "", err
 	}
-	return filepath.Join(home, ".wechatexplorer", "wechat-connector", "accounts"), nil
+	return filepath.Join(home, rootName, "wechat-connector", "accounts"), nil
+}
+
+// AccountsDir returns the TraceMemo directory where new credentials are stored.
+func AccountsDir() (string, error) {
+	return accountsDir(".tracememo")
+}
+
+// LegacyAccountsDir is read-only compatibility for v2.1.9 and earlier.
+func LegacyAccountsDir() (string, error) {
+	return accountsDir(".wechatexplorer")
+}
+
+func accountDirectoryForID(accountID string) (string, error) {
+	current, err := AccountsDir()
+	if err != nil {
+		return "", err
+	}
+	if _, err := os.Stat(filepath.Join(current, accountID+".json")); err == nil {
+		return current, nil
+	}
+	legacy, err := LegacyAccountsDir()
+	if err != nil {
+		return "", err
+	}
+	if _, err := os.Stat(filepath.Join(legacy, accountID+".json")); err == nil {
+		return legacy, nil
+	}
+	return current, nil
 }
 
 // NormalizeAccountID converts raw bot ID to filesystem-safe format.
@@ -159,13 +186,7 @@ func SaveCredentials(creds *Credentials) error {
 	return nil
 }
 
-// LoadAllCredentials loads all saved account credentials.
-func LoadAllCredentials() ([]*Credentials, error) {
-	dir, err := AccountsDir()
-	if err != nil {
-		return nil, err
-	}
-
+func loadCredentialsFromDir(dir string) ([]*Credentials, error) {
 	entries, err := os.ReadDir(dir)
 	if err != nil {
 		if os.IsNotExist(err) {
@@ -191,6 +212,24 @@ func LoadAllCredentials() ([]*Credentials, error) {
 	return result, nil
 }
 
+// LoadAllCredentials loads TraceMemo credentials first and falls back to the
+// untouched WechatExplorer directory for one-version upgrade compatibility.
+func LoadAllCredentials() ([]*Credentials, error) {
+	current, err := AccountsDir()
+	if err != nil {
+		return nil, err
+	}
+	credentials, err := loadCredentialsFromDir(current)
+	if err != nil || len(credentials) > 0 {
+		return credentials, err
+	}
+	legacy, err := LegacyAccountsDir()
+	if err != nil {
+		return nil, err
+	}
+	return loadCredentialsFromDir(legacy)
+}
+
 // CredentialsPath returns the path for display purposes.
 func CredentialsPath() (string, error) {
 	return AccountsDir()