feat(workbench): 新增收集箱页面 — 素材列表/详情分栏布局 + 新增/选中/删除 mock 交互

src/web/features/inbox/components/AddMaterialModal.tsx

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+import { App as AntApp, DatePicker, Form, Input, Modal } from "antd";
+import dayjs from "dayjs";
+import { useEffect } from "react";
+
+import type { Material } from "../types";
+
+interface AddMaterialModalProps {
+  onAdd: (material: Material) => void;
+  onOpenChange: (open: boolean) => void;
+  open: boolean;
+}
+
+interface FormValues {
+  associatedDate: dayjs.Dayjs;
+  description: string;
+}
+
+export function AddMaterialModal({ onAdd, onOpenChange, open }: AddMaterialModalProps) {
+  const { message } = AntApp.useApp();
+  const [form] = Form.useForm<FormValues>();
+
+  useEffect(() => {
+    if (!open) return;
+    form.resetFields();
+  }, [form, open]);
+
+  const handleFinish = (values: FormValues) => {
+    const material: Material = {
+      associatedDate: values.associatedDate.format("YYYY-MM-DD"),
+      createdAt: new Date().toISOString(),
+      description: values.description,
+      id: crypto.randomUUID(),
+    };
+    onAdd(material);
+    message.success("素材已添加");
+    onOpenChange(false);
+  };
+
+  return (
+    <Modal
+      destroyOnHidden
+      okText="确定"
+      onCancel={() => onOpenChange(false)}
+      onOk={() => void form.submit()}
+      open={open}
+      title="新增素材"
+    >
+      <Form
+        form={form}
+        initialValues={{ associatedDate: dayjs() }}
+        layout="vertical"
+        onFinish={(values) => void handleFinish(values)}
+      >
+        <Form.Item
+          label="描述"
+          name="description"
+          rules={[{ message: "请输入描述", required: true, whitespace: true }]}
+        >
+          <Input.TextArea maxLength={500} placeholder="请输入素材描述" />
+        </Form.Item>
+        <Form.Item label="关联时间" name="associatedDate" rules={[{ message: "请选择关联时间", required: true }]}>
+          <DatePicker className="app-inbox-datepicker" />
+        </Form.Item>
+      </Form>
+    </Modal>
+  );
+}

src/web/features/inbox/components/MaterialCard.tsx

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+import { DeleteOutlined } from "@ant-design/icons";
+import { Button, Card, Flex, Typography } from "antd";
+
+import type { Material } from "../types";
+
+import { formatRelativeTime } from "../../../shared/utils/time";
+
+interface MaterialCardProps {
+  material: Material;
+  onDelete: () => void;
+  onSelect: () => void;
+  selected: boolean;
+}
+
+export function MaterialCard({ material, onDelete, onSelect, selected }: MaterialCardProps) {
+  return (
+    <Card className={selected ? "app-inbox-card-selected" : undefined} hoverable onClick={onSelect} size="small">
+      <Typography.Paragraph ellipsis={{ rows: 3 }}>{material.description}</Typography.Paragraph>
+      <Flex align="center" justify="space-between">
+        <Typography.Text type="secondary">
+          {material.associatedDate} · {formatRelativeTime(material.createdAt)}
+        </Typography.Text>
+        <Button
+          aria-label="删除"
+          danger
+          icon={<DeleteOutlined />}
+          onClick={(e) => {
+            e.stopPropagation();
+            onDelete();
+          }}
+          size="small"
+          type="text"
+        />
+      </Flex>
+    </Card>
+  );
+}

src/web/features/inbox/components/MaterialContent.tsx

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+import { Card, Descriptions, Empty, Typography } from "antd";
+
+import type { Material } from "../types";
+
+import { formatRelativeTime } from "../../../shared/utils/time";
+
+interface MaterialContentProps {
+  material: Material | null;
+}
+
+export function MaterialContent({ material }: MaterialContentProps) {
+  if (!material) {
+    return (
+      <div className="app-inbox-content">
+        <Empty description="请在左侧选择素材" />
+      </div>
+    );
+  }
+
+  return (
+    <div className="app-inbox-content">
+      <Typography.Title level={4}>素材详情</Typography.Title>
+      <Card>
+        <Typography.Paragraph>{material.description}</Typography.Paragraph>
+        <Descriptions column={1} size="small">
+          <Descriptions.Item label="关联时间">{material.associatedDate}</Descriptions.Item>
+          <Descriptions.Item label="创建时间">{formatRelativeTime(material.createdAt)}</Descriptions.Item>
+        </Descriptions>
+      </Card>
+    </div>
+  );
+}

src/web/features/inbox/components/MaterialList.tsx

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+import { PlusOutlined } from "@ant-design/icons";
+import { Button, Empty } from "antd";
+
+import type { Material } from "../types";
+
+import { MaterialCard } from "./MaterialCard";
+
+interface MaterialListProps {
+  materials: readonly Material[];
+  onAddClick: () => void;
+  onDelete: (id: string) => void;
+  onSelect: (id: string) => void;
+  selectedId: null | string;
+}
+
+export function MaterialList({ materials, onAddClick, onDelete, onSelect, selectedId }: MaterialListProps) {
+  return (
+    <div className="app-inbox-sidebar">
+      <Button block icon={<PlusOutlined />} onClick={onAddClick} type="primary">
+        新增素材
+      </Button>
+      <div className="app-inbox-list">
+        {materials.length === 0 ? (
+          <Empty description="暂无素材" image={Empty.PRESENTED_IMAGE_SIMPLE} />
+        ) : (
+          materials.map((material) => (
+            <MaterialCard
+              key={material.id}
+              material={material}
+              onDelete={() => onDelete(material.id)}
+              onSelect={() => onSelect(material.id)}
+              selected={material.id === selectedId}
+            />
+          ))
+        )}
+      </div>
+    </div>
+  );
+}

src/web/features/inbox/index.tsx

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+import { useState } from "react";
+
+import type { Material } from "./types";
+
+import { AddMaterialModal } from "./components/AddMaterialModal";
+import { MaterialContent } from "./components/MaterialContent";
+import { MaterialList } from "./components/MaterialList";
+
+export function InboxPage() {
+  const [materials, setMaterials] = useState<Material[]>([]);
+  const [modalOpen, setModalOpen] = useState(false);
+  const [selectedId, setSelectedId] = useState<null | string>(null);
+
+  const selectedMaterial = materials.find((m) => m.id === selectedId) ?? null;
+
+  const handleAdd = (material: Material) => {
+    setMaterials((prev) => [...prev, material].sort((a, b) => b.associatedDate.localeCompare(a.associatedDate)));
+    setSelectedId(material.id);
+  };
+
+  const handleDelete = (id: string) => {
+    setMaterials((prev) => prev.filter((m) => m.id !== id));
+    if (selectedId === id) setSelectedId(null);
+  };
+
+  return (
+    <div className="app-inbox-page">
+      <MaterialList
+        materials={materials}
+        onAddClick={() => setModalOpen(true)}
+        onDelete={handleDelete}
+        onSelect={setSelectedId}
+        selectedId={selectedId}
+      />
+      <MaterialContent material={selectedMaterial} />
+      <AddMaterialModal onAdd={handleAdd} onOpenChange={setModalOpen} open={modalOpen} />
+    </div>
+  );
+}

src/web/features/inbox/types.ts

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+export interface Material {
+  associatedDate: string;
+  createdAt: string;
+  description: string;
+  id: string;
+}