refactor: 重组 components/ 和 pages/ 文件结构，按职责分层

components/ 拆为三层：
  - providers/   — 状态管理（App/Theme/SettingsProvider）
  - shell/       — 应用外壳（Layout/NavBar/PageDispatcher）
  - ui/          — 通用 UI 原子（FloatingPanel/LegalTextModal）

pages/ 重命名 + 重组：
  - headers/ → panels/        NavBar 触发的面板页
  - login/   → auth/          认证模块（含注册/忘记密码）
  - settings/blocks/ → sections/
  - home/components/ → panels/ features/ controls/ hooks/
    按职责分：panels(布局壳) + features(功能面板) + controls(表单控件) + hooks

其他清理：
  - 删除空占位 Test3.tsx
  - HomeContext 从 HomeContent 拆出独立文件
  - uploadValidation 内联到 ImageInput
  - 修复过时注释（useUI → controls）

src/pages/home/controls/ImageListInput.tsx

@@ -0,0 +1,49 @@
+// ============================================================
+// ImageListInput — imageList → Dragger（多张图片拖拽上传）
+// 用于图生图模型的多图输入场景
+// ============================================================
+
+import { Upload } from 'antd';
+import { InboxOutlined } from '@ant-design/icons';
+import type { UploadFile } from 'antd/es/upload';
+import type { WidgetProps } from './types';
+import { createImageBeforeUpload } from './ImageInput';
+import { useFileUpload } from '@/hooks/use-api';
+
+const { Dragger } = Upload;
+
+export function ImageListInput({ value, onChange, disabled, config }: WidgetProps) {
+   const fileList = (value as UploadFile[]) || [];
+   const maxSizeMb = (config.maxFileSizeMb as number) || 10;
+   const maxCount = (config.maxFiles as number) || 10;
+   const filters = config.fileFilter as string[] | undefined;
+
+   const { customRequest } = useFileUpload();
+
+   return (
+      <Dragger
+         multiple
+         listType="picture"
+         accept={
+            filters
+               ? filters.map((ext) => `image/${ext}`).join(',')
+               : 'image/png,image/jpg,image/jpeg,image/webp'
+         }
+         fileList={fileList}
+         customRequest={customRequest}
+         onChange={({ fileList: newList }) => onChange?.(newList)}
+         disabled={disabled}
+         beforeUpload={createImageBeforeUpload(maxSizeMb)}
+         maxCount={maxCount}
+      >
+         <p className="ant-upload-drag-icon">
+            <InboxOutlined />
+         </p>
+         <p className="ant-upload-text">点击或拖拽图片到此区域上传</p>
+         <p className="ant-upload-hint">
+            支持 {filters?.join(' / ').toUpperCase() || 'PNG / JPG / WebP'}
+            ，单张不超过 {maxSizeMb}MB
+         </p>
+      </Dragger>
+   );
+}