refactor: relocate components to app directory structure

src/app/auth/components/__tests__/auth-validators.test.ts

@@ -4,7 +4,7 @@ import {
   validateEmail,
   validatePassword,
   validateUsername,
-} from "@/components/auth/auth-validators";
+} from "@/app/auth/components/auth-validators";
 
 describe("validateEmail", () => {
   it("accepts a valid email", () => {

src/app/auth/components/auth-other-options-dialog.tsx

@@ -4,7 +4,7 @@
  *
  * 原始 Dart: lib/ui/auth/widgets/auth_other_options_dialog.dart
  */
-import { Dialog } from "@/components/core/dialog";
+import { Dialog } from "@/app/_components/core/dialog";
 import { AuthSocialButtons } from "./auth-social-buttons";
 import { AuthDivider } from "./auth-divider";
 import styles from "./auth-other-options-dialog.module.css";

src/app/auth/components/auth-screen.tsx

@@ -18,8 +18,8 @@ import { useChatDispatch } from "@/contexts/chat/chat-context";
 import { useUserDispatch } from "@/contexts/user/user-context";
 import { useAuthGate } from "@/lib/auth/use-auth-gate";
 import { ROUTES } from "@/lib/routes";
-import { MobileShell } from "@/components/core/mobile-shell";
-import { AuthPanel } from "@/components/auth/auth-panel";
+import { MobileShell } from "@/app/_components/core/mobile-shell";
+import { AuthPanel } from "@/app/auth/components/auth-panel";
 
 export interface AuthScreenProps {
   /** 自定义背景（默认紫粉渐变）。 */

src/app/auth/components/email-login-form.tsx

@@ -10,7 +10,7 @@ import { useAuthDispatch } from "@/contexts/auth/auth-context";
 import {
   validateEmail,
   validatePassword,
-} from "@/components/auth/auth-validators";
+} from "@/app/auth/components/auth-validators";
 
 import { AuthTextField } from "./auth-text-field";
 import { AuthPrimaryButton } from "./auth-primary-button";

src/app/auth/components/email-register-form.tsx

@@ -12,7 +12,7 @@ import {
   validateEmail,
   validatePassword,
   validateUsername,
-} from "@/components/auth/auth-validators";
+} from "@/app/auth/components/auth-validators";
 
 import { AuthTextField } from "./auth-text-field";
 import { AuthPrimaryButton } from "./auth-primary-button";

src/app/auth/page.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { AuthScreen } from "@/components/auth/auth-screen";
+import { AuthScreen } from "@/app/auth/components/auth-screen";
 
 export default function AuthPage() {
   return <AuthScreen />;

src/app/chat/components/chat-screen.tsx

@@ -2,8 +2,8 @@
 
 import { type FormEvent, useEffect, useRef, useState } from "react";
 
-import { MobileShell } from "@/components/core/mobile-shell";
-import { Dialog } from "@/components/core/dialog";
+import { MobileShell } from "@/app/_components/core/mobile-shell";
+import { Dialog } from "@/app/_components/core/dialog";
 import { useChatDispatch, useChatState } from "@/contexts/chat/chat-context";
 import { GuestChatQuota } from "@/contexts/chat/chat-types";
 import type { UiMessage } from "@/models/chat/ui-message";

src/app/chat/page.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { ChatScreen } from "@/components/chat/chat-screen";
+import { ChatScreen } from "@/app/chat/components/chat-screen";
 
 export default function ChatPage() {
   return <ChatScreen />;

src/app/sidebar/components/sidebar-screen.tsx

@@ -3,7 +3,7 @@
 import { useEffect } from "react";
 import Link from "next/link";
 
-import { MobileShell } from "@/components/core/mobile-shell";
+import { MobileShell } from "@/app/_components/core/mobile-shell";
 import { useUserDispatch, useUserState } from "@/contexts/user/user-context";
 
 import styles from "./sidebar-screen.module.css";

src/app/sidebar/page.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { SidebarScreen } from "@/components/sidebar/sidebar-screen";
+import { SidebarScreen } from "@/app/sidebar/components/sidebar-screen";
 
 export default function SidebarPage() {
   return <SidebarScreen />;

src/app/splash/components/splash-button.tsx

@@ -6,9 +6,9 @@
  */
 import { useAuthState } from "@/contexts/auth/auth-context";
 
-import { AuthSocialButtons } from "@/components/auth/auth-social-buttons";
-import { AuthPrimaryButton } from "@/components/auth/auth-primary-button";
-import { AuthDivider } from "@/components/auth/auth-divider";
+import { AuthSocialButtons } from "@/app/auth/components/auth-social-buttons";
+import { AuthPrimaryButton } from "@/app/auth/components/auth-primary-button";
+import { AuthDivider } from "@/app/auth/components/auth-divider";
 import { useAuthDispatch } from "@/contexts/auth/auth-context";
 import styles from "./splash-button.module.css";
 

src/app/splash/components/splash-loading.tsx

@@ -6,7 +6,7 @@
  *
  * 包装 `<LoadingIndicator>`，splash 阶段可能用于等待 auth 检查。
  */
-import { LoadingIndicator } from "@/components/core/loading-indicator";
+import { LoadingIndicator } from "@/app/_components/core/loading-indicator";
 
 export function SplashLoading() {
   return <LoadingIndicator size={48} color="var(--color-accent)" />;

src/app/splash/components/splash-screen.tsx

@@ -1,13 +1,5 @@
 "use client";
-/**
- * Splash 屏幕
- *
- * 原始 Dart: lib/ui/splash/splash_screen.dart
- *
- * 行为：
- *  - 渐变背景 + 品牌区 + 内容文案 + Skip/Facebook 按钮 + 底部辅助信息
- *  - 已登录用户：自动跳 /chat（由父级处理）
- */
+
 import { useRouter } from "next/navigation";
 import { useEffect, useRef } from "react";
 
@@ -16,7 +8,7 @@ import { useChatDispatch } from "@/contexts/chat/chat-context";
 import { useUserDispatch } from "@/contexts/user/user-context";
 import { useAuthGate } from "@/lib/auth/use-auth-gate";
 import { ROUTES } from "@/lib/routes";
-import { MobileShell } from "@/components/core/mobile-shell";
+import { MobileShell } from "@/app/_components/core/mobile-shell";
 
 import { SplashBackground } from "./splash-background";
 import { SplashLogo } from "./splash-logo";

src/app/splash/page.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { SplashScreen } from "@/components/splash/splash-screen";
+import { SplashScreen } from "@/app/splash/components/splash-screen";
 
 export default function SplashPage() {
   return <SplashScreen />;