feat(miniprogram): 医护工作台角色定制 + 性能优化

- auth store 新增 health_manager 角色，添加 isDoctor/isNurse/isHealthManager/hasRole 辅助方法
- 医生工作台按角色过滤功能卡片和快捷操作（doctor/nurse/health_manager/admin）
- 列表页面分页计算提取为 useMemo（patients/alerts/consultation）

apps/miniprogram/src/stores/auth.ts

@@ -24,6 +24,10 @@ interface AuthState {
   logout: () => void;
   restore: () => void;
   isMedicalStaff: () => boolean;
+  isDoctor: () => boolean;
+  isNurse: () => boolean;
+  isHealthManager: () => boolean;
+  hasRole: (code: string) => boolean;
   hasPatientProfile: () => boolean;
 }
 
@@ -36,7 +40,27 @@ export const useAuthStore = create<AuthState>((set, get) => ({
 
   isMedicalStaff: () => {
     const { roles } = get();
-    return roles.some((r) => r === 'doctor' || r === 'nurse' || r === 'admin');
+    return roles.some((r) => r === 'doctor' || r === 'nurse' || r === 'admin' || r === 'health_manager');
+  },
+
+  isDoctor: () => {
+    const { roles } = get();
+    return roles.some((r) => r === 'doctor' || r === 'admin');
+  },
+
+  isNurse: () => {
+    const { roles } = get();
+    return roles.some((r) => r === 'nurse' || r === 'admin');
+  },
+
+  isHealthManager: () => {
+    const { roles } = get();
+    return roles.some((r) => r === 'health_manager' || r === 'admin');
+  },
+
+  hasRole: (code: string) => {
+    const { roles } = get();
+    return roles.some((r) => r === code || r === 'admin');
   },
 
   hasPatientProfile: () => {