diff --git a/WonderQ-Admin-UI-Vue/src/lib/layout-settings.test.ts b/WonderQ-Admin-UI-Vue/src/lib/layout-settings.test.ts
new file mode 100644
index 0000000..0c9bdfb
--- /dev/null
+++ b/WonderQ-Admin-UI-Vue/src/lib/layout-settings.test.ts
@@ -0,0 +1,142 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+import {
+  DEFAULT_LAYOUT_SETTINGS,
+  LAYOUT_SETTINGS_KEY,
+  loadLayoutSettings,
+  normalizeLayoutSettings,
+  resetLayoutSettings,
+  saveLayoutSettings,
+  type LayoutSettings,
+} from "./layout-settings";
+
+function createStorage(initial: Record<string, string> = {}): Storage {
+  const values = new Map(Object.entries(initial));
+
+  return {
+    get length() {
+      return values.size;
+    },
+    clear: () => values.clear(),
+    getItem: (key) => values.get(key) ?? null,
+    key: (index) => [...values.keys()][index] ?? null,
+    removeItem: (key) => values.delete(key),
+    setItem: (key, value) => values.set(key, value),
+  };
+}
+
+describe("layout settings", () => {
+  afterEach(() => {
+    vi.unstubAllGlobals();
+  });
+
+  it("exposes the RuoYi default settings without sharing the exported object", () => {
+    expect(normalizeLayoutSettings(undefined)).toEqual(DEFAULT_LAYOUT_SETTINGS);
+    expect(normalizeLayoutSettings(undefined)).not.toBe(DEFAULT_LAYOUT_SETTINGS);
+  });
+
+  it("falls back for invalid enum, boolean, and theme values", () => {
+    expect(
+      normalizeLayoutSettings({
+        navType: "invalid",
+        sideTheme: "invalid",
+        theme: "#409ef",
+        tagsView: "yes",
+        tagsViewPersist: 1,
+        tagsIcon: null,
+        tagsViewStyle: "invalid",
+        fixedHeader: "false",
+        sidebarLogo: 0,
+        dynamicTitle: {},
+        footerVisible: [],
+      }),
+    ).toEqual(DEFAULT_LAYOUT_SETTINGS);
+  });
+
+  it("filters unknown fields and accepts only six-digit hex themes", () => {
+    const settings = normalizeLayoutSettings({
+      theme: "#12AbEf",
+      unknown: true,
+    });
+
+    expect(settings).toEqual({ ...DEFAULT_LAYOUT_SETTINGS, theme: "#12AbEf" });
+    expect("unknown" in settings).toBe(false);
+  });
+
+  it("saves and loads a settings round-trip", () => {
+    const storage = createStorage();
+    const settings: LayoutSettings = {
+      ...DEFAULT_LAYOUT_SETTINGS,
+      navType: "mix",
+      tagsView: false,
+      theme: "#123456",
+    };
+
+    saveLayoutSettings(settings, storage);
+
+    expect(storage.getItem(LAYOUT_SETTINGS_KEY)).toBe(JSON.stringify(settings));
+    expect(loadLayoutSettings(storage)).toEqual(settings);
+  });
+
+  it("safely falls back when storage access or JSON parsing fails", () => {
+    const storage = createStorage({ [LAYOUT_SETTINGS_KEY]: "{" });
+    expect(loadLayoutSettings(storage)).toEqual(DEFAULT_LAYOUT_SETTINGS);
+
+    const throwingStorage = {
+      getItem: () => {
+        throw new Error("blocked");
+      },
+      removeItem: () => {
+        throw new Error("blocked");
+      },
+      setItem: () => {
+        throw new Error("blocked");
+      },
+    } as unknown as Storage;
+
+    expect(loadLayoutSettings(throwingStorage)).toEqual(DEFAULT_LAYOUT_SETTINGS);
+    expect(() => saveLayoutSettings(DEFAULT_LAYOUT_SETTINGS, throwingStorage)).not.toThrow();
+    expect(resetLayoutSettings(throwingStorage)).toEqual(DEFAULT_LAYOUT_SETTINGS);
+  });
+
+  it("normalizes legal JSON with invalid, missing, and unknown stored fields", () => {
+    const storage = createStorage({
+      [LAYOUT_SETTINGS_KEY]: JSON.stringify({
+        navType: "invalid",
+        sideTheme: "theme-light",
+        theme: "blue",
+        tagsView: false,
+        tagsIcon: "yes",
+        tagsViewStyle: "chrome",
+        fixedHeader: true,
+        unknown: "ignored",
+      }),
+    });
+
+    expect(loadLayoutSettings(storage)).toEqual({
+      ...DEFAULT_LAYOUT_SETTINGS,
+      sideTheme: "theme-light",
+      tagsView: false,
+      tagsViewStyle: "chrome",
+      fixedHeader: true,
+    });
+  });
+
+  it("safely handles a localStorage getter that throws during default resolution", () => {
+    vi.stubGlobal("window", {
+      get localStorage() {
+        throw new Error("blocked");
+      },
+    });
+
+    expect(() => loadLayoutSettings()).not.toThrow();
+    expect(() => saveLayoutSettings(DEFAULT_LAYOUT_SETTINGS)).not.toThrow();
+    expect(() => resetLayoutSettings()).not.toThrow();
+  });
+
+  it("resets settings by clearing the persisted value", () => {
+    const storage = createStorage({ [LAYOUT_SETTINGS_KEY]: JSON.stringify({ theme: "#123456" }) });
+
+    expect(resetLayoutSettings(storage)).toEqual(DEFAULT_LAYOUT_SETTINGS);
+    expect(storage.getItem(LAYOUT_SETTINGS_KEY)).toBeNull();
+  });
+});
diff --git a/WonderQ-Admin-UI-Vue/src/lib/layout-settings.ts b/WonderQ-Admin-UI-Vue/src/lib/layout-settings.ts
new file mode 100644
index 0000000..cfc5bff
--- /dev/null
+++ b/WonderQ-Admin-UI-Vue/src/lib/layout-settings.ts
@@ -0,0 +1,130 @@
+export type NavigationType = "left" | "mix" | "top";
+export type SideTheme = "theme-dark" | "theme-light";
+export type TagsViewStyle = "card" | "chrome";
+
+export interface LayoutSettings {
+  navType: NavigationType;
+  sideTheme: SideTheme;
+  theme: string;
+  tagsView: boolean;
+  tagsViewPersist: boolean;
+  tagsIcon: boolean;
+  tagsViewStyle: TagsViewStyle;
+  fixedHeader: boolean;
+  sidebarLogo: boolean;
+  dynamicTitle: boolean;
+  footerVisible: boolean;
+}
+
+export const LAYOUT_SETTINGS_KEY = "wonderq-admin-layout-setting";
+
+export const DEFAULT_LAYOUT_SETTINGS: LayoutSettings = {
+  navType: "left",
+  sideTheme: "theme-dark",
+  theme: "#409EFF",
+  tagsView: true,
+  tagsViewPersist: false,
+  tagsIcon: false,
+  tagsViewStyle: "card",
+  fixedHeader: false,
+  sidebarLogo: true,
+  dynamicTitle: false,
+  footerVisible: false,
+};
+
+const navigationTypes: readonly NavigationType[] = ["left", "mix", "top"];
+const sideThemes: readonly SideTheme[] = ["theme-dark", "theme-light"];
+const tagsViewStyles: readonly TagsViewStyle[] = ["card", "chrome"];
+
+const unavailableStorage: Storage = {
+  get length() {
+    return 0;
+  },
+  clear() {},
+  getItem() {
+    return null;
+  },
+  key() {
+    return null;
+  },
+  removeItem() {},
+  setItem() {},
+};
+
+function getDefaultStorage(): Storage {
+  try {
+    if (typeof window === "undefined") {
+      return unavailableStorage;
+    }
+
+    return window.localStorage;
+  } catch {
+    return unavailableStorage;
+  }
+}
+
+function isRecord(input: unknown): input is Record<string, unknown> {
+  return typeof input === "object" && input !== null && !Array.isArray(input);
+}
+
+function valueOrDefault<T>(value: unknown, values: readonly T[], fallback: T): T {
+  return values.includes(value as T) ? (value as T) : fallback;
+}
+
+function booleanOrDefault(value: unknown, fallback: boolean): boolean {
+  return typeof value === "boolean" ? value : fallback;
+}
+
+function themeOrDefault(value: unknown): string {
+  return typeof value === "string" && /^#[0-9A-Fa-f]{6}$/.test(value)
+    ? value
+    : DEFAULT_LAYOUT_SETTINGS.theme;
+}
+
+export function normalizeLayoutSettings(input: unknown): LayoutSettings {
+  const source = isRecord(input) ? input : {};
+
+  return {
+    navType: valueOrDefault(source.navType, navigationTypes, DEFAULT_LAYOUT_SETTINGS.navType),
+    sideTheme: valueOrDefault(source.sideTheme, sideThemes, DEFAULT_LAYOUT_SETTINGS.sideTheme),
+    theme: themeOrDefault(source.theme),
+    tagsView: booleanOrDefault(source.tagsView, DEFAULT_LAYOUT_SETTINGS.tagsView),
+    tagsViewPersist: booleanOrDefault(source.tagsViewPersist, DEFAULT_LAYOUT_SETTINGS.tagsViewPersist),
+    tagsIcon: booleanOrDefault(source.tagsIcon, DEFAULT_LAYOUT_SETTINGS.tagsIcon),
+    tagsViewStyle: valueOrDefault(source.tagsViewStyle, tagsViewStyles, DEFAULT_LAYOUT_SETTINGS.tagsViewStyle),
+    fixedHeader: booleanOrDefault(source.fixedHeader, DEFAULT_LAYOUT_SETTINGS.fixedHeader),
+    sidebarLogo: booleanOrDefault(source.sidebarLogo, DEFAULT_LAYOUT_SETTINGS.sidebarLogo),
+    dynamicTitle: booleanOrDefault(source.dynamicTitle, DEFAULT_LAYOUT_SETTINGS.dynamicTitle),
+    footerVisible: booleanOrDefault(source.footerVisible, DEFAULT_LAYOUT_SETTINGS.footerVisible),
+  };
+}
+
+export function loadLayoutSettings(storage: Storage = getDefaultStorage()): LayoutSettings {
+  try {
+    const serialized = storage.getItem(LAYOUT_SETTINGS_KEY);
+    return serialized === null ? normalizeLayoutSettings(undefined) : normalizeLayoutSettings(JSON.parse(serialized));
+  } catch {
+    return normalizeLayoutSettings(undefined);
+  }
+}
+
+export function saveLayoutSettings(
+  settings: LayoutSettings,
+  storage: Storage = getDefaultStorage(),
+): void {
+  try {
+    storage.setItem(LAYOUT_SETTINGS_KEY, JSON.stringify(normalizeLayoutSettings(settings)));
+  } catch {
+    // Storage may be unavailable or disabled in the current browser context.
+  }
+}
+
+export function resetLayoutSettings(storage: Storage = getDefaultStorage()): LayoutSettings {
+  try {
+    storage.removeItem(LAYOUT_SETTINGS_KEY);
+  } catch {
+    // Storage may be unavailable or disabled in the current browser context.
+  }
+
+  return normalizeLayoutSettings(undefined);
+}