diff --git a/server/internal/auth/email.go b/server/internal/auth/email.go
index 4467069..84e8b97 100644
--- a/server/internal/auth/email.go
+++ b/server/internal/auth/email.go
@@ -73,11 +73,10 @@ func (h *Handlers) EmailCode(c *gin.Context) {
 	}
 
 	code := randCode()
-	// ⚠️ 开发期便利【上线阻断项】：mock 邮件（SMTP 未配置）时验证码固定 888888，
-	// 免翻日志。真实 Mailer 接入后自动回到随机码；若生产误配 mock，
-	// 任何人可用固定码登录任意邮箱——pickMailer 的 TODO 必须先解决。
-	if _, mock := h.Mailer.(MockMailer); mock {
-		code = "888888"
+	// ⚠️ 开发期便利：AUTH_EMAIL_DEV_CODE 显式设置时验证码固定（run-dev.sh 设 888888），
+	// 免翻日志。仅开发脚本会设置该变量；生产部署不设即为随机码，启动时若设有醒目告警。
+	if h.DevCode != "" {
+		code = h.DevCode
 	}
 	if err := h.RDB.Set(c, store.KeyAuthEmail(email), code, emailCodeTTL).Err(); err != nil {
 		c.JSON(http.StatusInternalServerError, protocol.NewAPIError(protocol.ErrInternal))
diff --git a/server/internal/auth/handlers.go b/server/internal/auth/handlers.go
index 1dbfa8a..f97e1a6 100644
--- a/server/internal/auth/handlers.go
+++ b/server/internal/auth/handlers.go
@@ -21,6 +21,8 @@ type Handlers struct {
 	JWT    *JWT
 	Wechat WechatClient
 	Mailer Mailer
+	// DevCode 非空时邮箱验证码固定为该值（AUTH_EMAIL_DEV_CODE，仅开发脚本设置）。
+	DevCode string
 	// QrAuthURL 二维码内容模板（真实环境为微信开放平台授权页，%s 为 state）
 	QrAuthURL string
 }
diff --git a/server/internal/config/config.go b/server/internal/config/config.go
index b0ccdbb..f865384 100644
--- a/server/internal/config/config.go
+++ b/server/internal/config/config.go
@@ -42,6 +42,8 @@ type Config struct {
 
 	// SMTP（邮箱验证码登录；未配置降级 mock mailer）
 	SMTPHost string
+	// EmailDevCode 非空时邮箱验证码固定为该值（仅开发脚本设置，生产禁用）
+	EmailDevCode string
 
 	// AppLatest 启动时解析 APP_LATEST_JSON 一次（17G）：平台→版本信息。
 	// 解析失败或未配置则为 nil/空，handler 据此返回 204，不 fail-fast。
@@ -74,6 +76,7 @@ func Load() Config {
 		OSSEndpoint:  os.Getenv("OSS_ENDPOINT"),
 		OSSBucket:    os.Getenv("OSS_BUCKET"),
 		SMTPHost:     os.Getenv("SMTP_HOST"),
+		EmailDevCode: os.Getenv("AUTH_EMAIL_DEV_CODE"),
 		OSSKeyID:     os.Getenv("OSS_KEY_ID"),
 		OSSKeySecret: os.Getenv("OSS_KEY_SECRET"),
 
diff --git a/server/internal/httpapi/router.go b/server/internal/httpapi/router.go
index 382ee43..a3782c7 100644
--- a/server/internal/httpapi/router.go
+++ b/server/internal/httpapi/router.go
@@ -94,7 +94,10 @@ func Register(r *gin.Engine, d *Deps) {
 		"asr_provider", providerKind, "wechat", wechatKind, "pay", payKind,
 		"storage", storageKind, "mailer", mailerKind)
 
-	authH := &auth.Handlers{DB: d.DB, RDB: d.RDB, JWT: d.JWT, Wechat: wechat, Mailer: mailer}
+	if d.Cfg.EmailDevCode != "" {
+		slog.Warn("⚠️ AUTH_EMAIL_DEV_CODE 已设置：邮箱验证码为固定值，任何人可登录任意邮箱账号——生产环境严禁")
+	}
+	authH := &auth.Handlers{DB: d.DB, RDB: d.RDB, JWT: d.JWT, Wechat: wechat, Mailer: mailer, DevCode: d.Cfg.EmailDevCode}
 	billH := &billing.Handlers{DB: d.DB, Pay: pay, Quota: d.Quota}
 	userH := &user.Handlers{DB: d.DB, Quota: d.Quota, AppVersions: d.Cfg.AppLatest}
 	fbH := &feedback.Handlers{DB: d.DB, RDB: d.RDB, Storage: storage}
diff --git a/server/internal/httpapi/var/uploads/fb/fb1c4c0e92e99544c69fcf37/1.png b/server/internal/httpapi/var/uploads/fb/fb1c4c0e92e99544c69fcf37/1.png
new file mode 100644
index 0000000..c9576d5
Binary files /dev/null and b/server/internal/httpapi/var/uploads/fb/fb1c4c0e92e99544c69fcf37/1.png differ
diff --git a/server/run-dev.sh b/server/run-dev.sh
index 7d74a6a..e6567dd 100755
--- a/server/run-dev.sh
+++ b/server/run-dev.sh
@@ -3,6 +3,9 @@
 #   DashScope Key 从 Bitwarden 取（条目名 dashscope-api-key），有则真实识别，无则自动落 mock provider。
 #   前置：rbw unlock 已解锁；docker compose up -d 已起 pg/redis。
 set -e
+
+# 开发期固定邮箱验证码（仅本脚本设置；生产部署不经此脚本，不会带上）
+export AUTH_EMAIL_DEV_CODE=888888
 if rbw get dashscope-api-key >/dev/null 2>&1; then
   echo "[run-dev] 使用真实 gummy provider"
   rbw get dashscope-api-key | { read -r K; ASR_PROVIDER=gummy DASHSCOPE_API_KEY="$K" exec go run ./cmd/server; }