feat: JWT Claims 新增资产字段，登录 token 携带当前资产上下文

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

internal/middleware/personal_auth.go

@@ -90,6 +90,8 @@ func (m *PersonalAuthMiddleware) Authenticate() fiber.Handler {
 
 		c.Locals("customer_id", claims.CustomerID)
 		c.Locals("customer_phone", claims.Phone)
+		c.Locals("customer_asset_type", claims.AssetType)
+		c.Locals("customer_asset_id", claims.AssetID)
 		c.Locals("skip_owner_filter", true)
 
 		m.logger.Debug("个人客户认证成功",
@@ -113,3 +115,11 @@ func GetCustomerPhone(c *fiber.Ctx) (string, bool) {
 	phone, ok := c.Locals("customer_phone").(string)
 	return phone, ok
 }
+
+// GetCurrentAsset 从 context 中获取当前登录所用的资产类型和 ID
+func GetCurrentAsset(c *fiber.Ctx) (assetType string, assetID uint, ok bool) {
+	assetType, _ = c.Locals("customer_asset_type").(string)
+	assetID, _ = c.Locals("customer_asset_id").(uint)
+	ok = assetType != "" && assetID != 0
+	return
+}