refactor(member page): extract global config getter method

extract repeated diyData.global access into a dedicated globalCfg computed property, simplify button visibility check logic

pages_tool/member/index.vue

@@ -96,11 +96,14 @@ export default {
 				minHeight: this.openBottomNav ? 'calc(100vh - 55px)' : ''
 			};
 		},
+		globalCfg() {
+			return this.diyData?.global;
+		},
 		isShowCancelButton() {
-			return this.diyData?.global?.isShowCancelButton?.[`${this.getAppType()}`] === 1
+			return this.globalCfg?.isShowCancelButton?.[`${this.getAppType()}`] === 1
 		},
 		isShowLogoutButton() {
-			return this.diyData?.global?.isShowLogoutButton?.[`${this.getAppType()}`] === 1
+			return this.globalCfg?.isShowLogoutButton?.[`${this.getAppType()}`] === 1
 		}
 	},
 	onLoad() {