fix: layers.js财务层key从financial改为finance(匹配后端)

frontend/src/config/layers.js

@@ -9,12 +9,12 @@
  *   学习层  #E6A23C (橙) — 领先指标(根本驱动)
  */
 
-export const LAYER_KEYS = ['financial', 'customer', 'process', 'learning']
+export const LAYER_KEYS = ['finance', 'customer', 'process', 'learning']
 
 /** 每层默认的颜色/图标/预设节点 */
 export const LAYER_CONFIG = {
-  financial: {
+  finance: {
-    key: 'financial',
+    key: 'finance',
     label: '财务层',
     enLabel: 'Financial',
     icon: '💰',