新增登录页图形验证码功能，支持通过Redis全局配置控制验证码的启用状态，优化登录流程以提升用户体验。新增相关API接口和前端配置项，确保验证码逻辑与后端同步。

jeecgboot-vue3/src/hooks/setting/useRootSetting.ts

@@ -4,6 +4,7 @@ import { computed } from 'vue';
 
 import { useAppStore } from '/@/store/modules/app';
 import { ContentEnum, ThemeEnum } from '/@/enums/appEnum';
+import projectSetting from '/@/settings/projectSetting';
 
 type RootSetting = Omit<ProjectConfig, 'locale' | 'headerSetting' | 'menuSetting' | 'multiTabsSetting'>;
 
@@ -45,6 +46,18 @@ export function useRootSetting() {
   const getGrayMode = computed(() => appStore.getProjectConfig.grayMode);
   // 代码逻辑说明: 【QQYUN-10952】AI助手支持通过设置来配置是否显示
   const getAiIconShow = computed(() => appStore.getProjectConfig.aiIconShow);
+  /** 与 projectSetting 默认合并：旧缓存无该字段时不再误判为「开启验证码」；兼容异常字符串缓存 */
+  const getLoginCaptchaEnabled = computed(() => {
+    const v = appStore.getProjectConfig.loginCaptchaEnabled;
+    if (v === undefined || v === null) {
+      return projectSetting.loginCaptchaEnabled;
+    }
+    if (typeof v === 'string') {
+      const s = v.trim().toLowerCase();
+      return s === 'true' || s === '1';
+    }
+    return Boolean(v);
+  });
   const getLockTime = computed(() => appStore.getProjectConfig.lockTime);
 
   const getShowDarkModeToggle = computed(() => appStore.getProjectConfig.showDarkModeToggle);
@@ -86,5 +99,6 @@ export function useRootSetting() {
     setDarkMode,
     getShowDarkModeToggle,
     getAiIconShow,
+    getLoginCaptchaEnabled,
   };
 }