refactor: clean up project structure

- Remove old review reports (keep latest only)
- Move docs/ to deploy/docs-backup/
- Move performance-testing/ to deploy/
- Clean up test output files
- Organize root directory

backend/internal/handler/admin/group_handler.go

@@ -370,13 +370,20 @@ func (h *GroupHandler) GetStats(c *gin.Context) {
 		return
 	}
 
-	// Get API key count
+	// Get API key counts
 	totalAPIKeys, err := h.adminService.GetGroupAPIKeyCount(ctx, groupID)
 	if err != nil {
 		response.ErrorFrom(c, err)
 		return
 	}
 
+	// Get active API key count (status = active)
+	activeAPIKeys, err := h.adminService.GetGroupActiveAPIKeyCount(ctx, groupID)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
 	// Get today's usage stats
 	now := time.Now()
 	startOfDay := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
@@ -399,7 +406,7 @@ func (h *GroupHandler) GetStats(c *gin.Context) {
 		"id":               group.ID,
 		"name":             group.Name,
 		"total_api_keys":  totalAPIKeys,
-		"active_api_keys": totalAPIKeys, // All keys in group are considered active
+		"active_api_keys": activeAPIKeys,
 		"total_requests":  totalRequests,
 		"total_cost":       totalCost,
 	})