fix: clear default external docs_link, add migration to use in-app /docs page

model/main.go

@@ -272,6 +272,8 @@ func migrateDB() error {
 	if err := migrateTokenModelLimitsToText(); err != nil {
 		return err
 	}
+	// Clear legacy external docs_link so the in-app /docs page is used by default
+	migrateDocsLinkToDefault()
 	// GORM AutoMigrate + Postgres: MigrateColumnUnique drops NamingStrategy.UniqueName(table, col)
 	// when the column is UNIQUE in information_schema but the model uses uniqueIndex (field.Unique=false).
 	// If the live constraint was created with another name (e.g. Postgres default), DROP uni_* fails (SQLSTATE 42704).
@@ -583,6 +585,28 @@ func migrateTokenModelLimitsToText() error {
 	return nil
 }
 
+// migrateDocsLinkToDefault clears any external docs_link saved in DB so the in-app /docs page is used.
+// Admins can still re-configure an external link via Settings UI if desired.
+func migrateDocsLinkToDefault() {
+	if DB == nil {
+		return
+	}
+	key := "general_setting.docs_link"
+	var opt Option
+	if err := DB.Where("`key` = ?", key).First(&opt).Error; err != nil {
+		// No existing record or table doesn't exist — nothing to migrate
+		return
+	}
+	if opt.Value == "" {
+		return
+	}
+	if err := DB.Model(&Option{}).Where("`key` = ?", key).Update("value", "").Error; err != nil {
+		common.SysLog(fmt.Sprintf("migrateDocsLinkToDefault: failed to clear %s: %v", key, err))
+		return
+	}
+	common.SysLog("migrateDocsLinkToDefault: cleared legacy docs_link, now using in-app /docs page")
+}
+
 // migrateSubscriptionPlanPriceAmount migrates price_amount column from float/double to decimal(10,6)
 // This is safe to run multiple times - it checks the column type first
 func migrateSubscriptionPlanPriceAmount() {

setting/operation_setting/general_setting.go

@@ -51,7 +51,7 @@ type GeneralSetting struct {
 
 // 默认配置
 var generalSetting = GeneralSetting{
-	DocsLink:                   "https://docs.newapi.pro",
+	DocsLink:                   "",
 	DefaultSiteLanguage:        "zh-CN",
 	PingIntervalEnabled:        false,
 	PingIntervalSeconds:        60,