fix: unify handler response format in log, permission, webhook handlers

- log_handler.go: Fix GetMyLoginLogs/GetMyOperationLogs/GetLoginLogs/GetOperationLogs to use {code, message, data}
- permission_handler.go: Fix all error responses to use {code, message}
- webhook_handler.go: Add missing "message" field in success responses, wrap data in data object with list/total/page/page_size
- webhook_handler_test.go: Update test to match new response format

Standardize all JSON responses to {code: 0, message: "success", data: ...} for success
and {code: XXX, message: "..."} for errors.

internal/api/handler/log_handler.go

@@ -27,7 +27,7 @@ func NewLogHandler(loginLogService *service.LoginLogService, operationLogService
 func (h *LogHandler) GetMyLoginLogs(c *gin.Context) {
 	userID, ok := getUserIDFromContext(c)
 	if !ok {
-		c.JSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+		c.JSON(http.StatusUnauthorized, gin.H{"code": 401, "message": "unauthorized"})
 		return
 	}
 
@@ -41,17 +41,21 @@ func (h *LogHandler) GetMyLoginLogs(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{
-		"list":    logs,
-		"total":   total,
-		"page":    page,
-		"page_size": pageSize,
+		"code":    0,
+		"message": "success",
+		"data": gin.H{
+			"list":      logs,
+			"total":     total,
+			"page":      page,
+			"page_size": pageSize,
+		},
 	})
 }
 
 func (h *LogHandler) GetMyOperationLogs(c *gin.Context) {
 	userID, ok := getUserIDFromContext(c)
 	if !ok {
-		c.JSON(http.StatusUnauthorized, gin.H{"error": "unauthorized"})
+		c.JSON(http.StatusUnauthorized, gin.H{"code": 401, "message": "unauthorized"})
 		return
 	}
 
@@ -65,17 +69,21 @@ func (h *LogHandler) GetMyOperationLogs(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{
-		"list":      logs,
-		"total":     total,
-		"page":      page,
-		"page_size": pageSize,
+		"code":    0,
+		"message": "success",
+		"data": gin.H{
+			"list":      logs,
+			"total":     total,
+			"page":      page,
+			"page_size": pageSize,
+		},
 	})
 }
 
 func (h *LogHandler) GetLoginLogs(c *gin.Context) {
 	var req service.ListLoginLogRequest
 	if err := c.ShouldBindQuery(&req); err != nil {
-		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": err.Error()})
 		return
 	}
 
@@ -102,17 +110,21 @@ func (h *LogHandler) GetLoginLogs(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{
-		"list":    logs,
-		"total":   total,
-		"page":    req.Page,
-		"page_size": req.PageSize,
+		"code":    0,
+		"message": "success",
+		"data": gin.H{
+			"list":      logs,
+			"total":     total,
+			"page":      req.Page,
+			"page_size": req.PageSize,
+		},
 	})
 }
 
 func (h *LogHandler) GetOperationLogs(c *gin.Context) {
 	var req service.ListOperationLogRequest
 	if err := c.ShouldBindQuery(&req); err != nil {
-		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": err.Error()})
 		return
 	}
 
@@ -139,17 +151,21 @@ func (h *LogHandler) GetOperationLogs(c *gin.Context) {
 	}
 
 	c.JSON(http.StatusOK, gin.H{
-		"list":    logs,
-		"total":   total,
-		"page":    req.Page,
-		"page_size": req.PageSize,
+		"code":    0,
+		"message": "success",
+		"data": gin.H{
+			"list":      logs,
+			"total":     total,
+			"page":      req.Page,
+			"page_size": req.PageSize,
+		},
 	})
 }
 
 func (h *LogHandler) ExportLoginLogs(c *gin.Context) {
 	var req service.ExportLoginLogRequest
 	if err := c.ShouldBindQuery(&req); err != nil {
-		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		c.JSON(http.StatusBadRequest, gin.H{"code": 400, "message": err.Error()})
 		return
 	}