feat(filelib-web): 老师端文件库改网盘式网格浏览(下钻导航+右键菜单)

- 新 GridLibraryView:双击下钻文件夹/项目,面包屑+返回跳级,项目内文件同网格,
  双击进 FileEditor 预览;工具条按上下文出新建文件夹/项目/文件
- 右键菜单(ContextMenu):打开/新建子文件夹/重命名/授权管理/详情/删除,
  按节点 role 动态显隐;文件菜单:打开预览/下载/删除;空白处右键出新建+刷新
- GridCard 大图标卡片(琥珀文件夹/立方体项目/文档文件);授权与详情复用
  GrantsPanel/OverviewPanel(Modal 加 maxW prop);Icon 补 5 个图标
- 管理后台 /database 保留树状 LibraryView 不动;后端零改动

hub/filelib-web/src/lib/ContextMenu.svelte

@@ -0,0 +1,55 @@
+<script lang="ts" module>
+  import type { IconName } from "./Icon.svelte";
+
+  export interface MenuItem {
+    readonly label: string;
+    readonly icon?: IconName;
+    readonly danger?: boolean;
+    readonly onclick: () => void;
+  }
+</script>
+
+<script lang="ts">
+  /**
+   * 通用右键菜单:光标处弹出,点任意处/再次右键关闭。
+   * 位置做视口夹取(右侧/底部溢出时向内收)。
+   */
+  import Icon from "./Icon.svelte";
+
+  let { x, y, items, onclose }: { x: number; y: number; items: readonly MenuItem[]; onclose: () => void } = $props();
+
+  const MENU_W = 178;
+  const ITEM_H = 34;
+  const px = $derived(
+    typeof window === "undefined" ? x : Math.max(4, Math.min(x, window.innerWidth - MENU_W - 8)),
+  );
+  const py = $derived(
+    typeof window === "undefined" ? y : Math.max(4, Math.min(y, window.innerHeight - items.length * ITEM_H - 20)),
+  );
+</script>
+
+<div
+  class="fixed inset-0 z-50"
+  role="presentation"
+  onclick={onclose}
+  oncontextmenu={(e) => { e.preventDefault(); onclose(); }}
+>
+  <div
+    class="fixed rounded-xl border border-line-soft bg-panel py-1.5 shadow-[0_8px_28px_rgba(26,26,24,.12)]"
+    style="left:{px}px;top:{py}px;width:{MENU_W}px"
+  >
+    {#each items as item (item.label)}
+      <button
+        class="flex w-full items-center gap-2.5 px-3.5 py-[7px] text-left text-[12.5px] transition {item.danger
+          ? 'text-danger hover:bg-hover'
+          : 'text-ink hover:bg-hover'}"
+        onclick={() => { onclose(); item.onclick(); }}
+      >
+        {#if item.icon}
+          <span class={item.danger ? "" : "text-ink-3"}><Icon name={item.icon} size={14} /></span>
+        {/if}
+        {item.label}
+      </button>
+    {/each}
+  </div>
+</div>

hub/filelib-web/src/lib/GridCard.svelte

@@ -0,0 +1,47 @@
+<script lang="ts">
+  /**
+   * 网盘式大图标卡片:文件夹(琥珀填充)/项目(立方体描边)/文件(文档描边)。
+   * 单击选中、onopen(双击)、oncontextmenu(右键,回传光标坐标)。
+   */
+  let {
+    kind,
+    name,
+    meta = null,
+    selected = false,
+    onselect,
+    onopen,
+    oncontextmenu,
+  }: {
+    kind: "FOLDER" | "PROJECT" | "FILE";
+    name: string;
+    meta?: string | null;
+    selected?: boolean;
+    onselect: () => void;
+    onopen: () => void;
+    oncontextmenu: (x: number, y: number) => void;
+  } = $props();
+</script>
+
+<button
+  class="flex cursor-pointer flex-col items-center gap-1.5 rounded-xl px-2 pb-2 pt-3 select-none {selected
+    ? 'bg-selected'
+    : 'hover:bg-hover'}"
+  onclick={onselect}
+  ondblclick={onopen}
+  oncontextmenu={(e) => { e.preventDefault(); oncontextmenu(e.clientX, e.clientY); }}
+  title={name}
+>
+  <span class="flex h-14 w-14 items-center justify-center">
+    {#if kind === "FOLDER"}
+      <svg width="54" height="54" viewBox="0 0 24 24" fill="#f5c94a" stroke="#d9a92b" stroke-width="0.6" stroke-linejoin="round"><path d="M3 7a2 2 0 0 1 2-2h4l2 2h8a2 2 0 0 1 2 2v9a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V7Z" /></svg>
+    {:else if kind === "PROJECT"}
+      <svg width="50" height="50" viewBox="0 0 24 24" fill="#e8f0ea" stroke="#4a6741" stroke-width="1.4" stroke-linecap="round" stroke-linejoin="round"><path d="M20 7l-8-4-8 4m16 0l-8 4m8-4v10l-8 4m0-10L4 7m8 4v10M4 7v10l8 4" /></svg>
+    {:else}
+      <svg width="46" height="46" viewBox="0 0 24 24" fill="#ffffff" stroke="#9c9b96" stroke-width="1.4" stroke-linecap="round" stroke-linejoin="round"><path d="M14 3H7a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h10a2 2 0 0 0 2-2V8l-5-5Z" /><path d="M14 3v5h5" /><path d="M9 13h6M9 17h6" /></svg>
+    {/if}
+  </span>
+  <span class="line-clamp-2 w-full break-all text-center text-[12.5px] leading-snug text-ink">{name}</span>
+  {#if meta !== null}
+    <span class="-mt-1 text-[10.5px] text-ink-3">{meta}</span>
+  {/if}
+</button>

hub/filelib-web/src/lib/GridLibraryView.svelte

@@ -0,0 +1,534 @@
+<script lang="ts">
+  /**
+   * 老师端网盘式文件库浏览器(仅 /app;管理后台沿用树状 LibraryView)。
+   *
+   * 下钻导航:双击文件夹/项目进入,面包屑 + 返回跳级;项目内文件同样网格化,
+   * 双击进 FileEditor 预览。管理动作全走右键菜单,按节点 role 动态显隐:
+   *  打开 / 新建子文件夹(EDIT+,仅 FOLDER)/ 重命名(MANAGE)/ 授权管理(MANAGE,
+   *  宽 Modal 复用 GrantsPanel)/ 详情(复用 OverviewPanel)/ 删除(MANAGE)。
+   * 文件菜单:打开预览 / 下载 / 删除(EDIT+)。
+   */
+  import { onMount } from "svelte";
+  import { api } from "./api.js";
+  import { me, toastErr, toastOk } from "./stores.js";
+  import { logout } from "./session.js";
+  import { selectedFilePath, clearSelectedFile } from "./browser.js";
+  import { ROLE_LABEL } from "./labels.js";
+  import type { FileEntry, NodeChild, NodeDetail, Role } from "./types.js";
+  import Icon from "./Icon.svelte";
+  import Modal from "./Modal.svelte";
+  import ContextMenu, { type MenuItem } from "./ContextMenu.svelte";
+  import GridCard from "./GridCard.svelte";
+  import FileEditor from "./FileEditor.svelte";
+  import GrantsPanel from "./GrantsPanel.svelte";
+  import OverviewPanel from "./OverviewPanel.svelte";
+
+  const RANK: Record<Role, number> = { VIEW: 1, EDIT: 2, MANAGE: 3 };
+  const atLeast = (role: Role, min: Role): boolean => RANK[role] >= RANK[min];
+
+  type View = "nodes" | "files";
+
+  let view = $state<View>("nodes");
+  /** 下钻栈(均为 FOLDER;根层为空栈)。 */
+  let stack = $state<NodeChild[]>([]);
+  let children = $state<NodeChild[] | null>(null);
+  let nodesError = $state<string | null>(null);
+
+  /** 文件视图:当前项目详情 + 文件列表。 */
+  let projectNode = $state<NodeDetail | null>(null);
+  let files = $state<FileEntry[] | null>(null);
+  let filesError = $state<string | null>(null);
+
+  let selected = $state<string | null>(null);
+  let menu = $state<{ x: number; y: number; items: readonly MenuItem[] } | null>(null);
+
+  // 弹窗:create(新建文件夹/项目)/ rename / grants / detail / newFile
+  let modal = $state<"create" | "rename" | "grants" | "detail" | "newFile" | null>(null);
+  let createKind = $state<"FOLDER" | "PROJECT">("FOLDER");
+  let createParentId = $state<string | null>(null);
+  let formName = $state("");
+  let formDesc = $state("");
+  let renameTarget = $state<NodeChild | null>(null);
+  let detailNode = $state<NodeDetail | null>(null);
+  let newPath = $state("");
+  let newContent = $state("");
+  let saving = $state(false);
+
+  const errText = (e: unknown): string => (e instanceof Error ? e.message : String(e));
+  const currentFolder = $derived(stack.length === 0 ? null : stack[stack.length - 1]!);
+  const canCreateHere = $derived(
+    currentFolder === null ? ($me?.isWebsiteAdmin ?? false) : atLeast(currentFolder.role, "EDIT"),
+  );
+  const projectCanEdit = $derived(projectNode !== null && projectNode.role !== "VIEW");
+  const initial = $derived(($me?.displayName ?? $me?.userId ?? "U").slice(0, 1).toUpperCase());
+
+  /* ------------------------------------------------------------ 数据加载 */
+
+  async function loadChildren(): Promise<void> {
+    children = null;
+    nodesError = null;
+    try {
+      const parent = currentFolder;
+      const url = parent === null
+        ? "/database/api/nodes"
+        : `/database/api/nodes?parentId=${encodeURIComponent(parent.id)}`;
+      const r = await api<{ nodes: NodeChild[] }>(url);
+      children = r.nodes;
+    } catch (e) {
+      nodesError = errText(e);
+    }
+  }
+
+  async function loadFiles(): Promise<void> {
+    if (projectNode === null) return;
+    files = null;
+    filesError = null;
+    try {
+      const r = await api<{ files: FileEntry[] }>(`/database/api/projects/${projectNode.id}/files`);
+      files = r.files;
+    } catch (e) {
+      filesError = errText(e);
+    }
+  }
+
+  async function fetchDetail(id: string): Promise<NodeDetail> {
+    const r = await api<{ node: NodeDetail }>(`/database/api/nodes/${id}`);
+    return r.node;
+  }
+
+  onMount(loadChildren);
+
+  function refresh(): void {
+    selected = null;
+    menu = null;
+    if (view === "files") void loadFiles();
+    else void loadChildren();
+  }
+
+  /* ------------------------------------------------------------ 导航 */
+
+  function openNode(n: NodeChild): void {
+    selected = null;
+    if (n.kind === "FOLDER") {
+      stack = [...stack, n];
+      void loadChildren();
+    } else {
+      void (async () => {
+        try {
+          projectNode = await fetchDetail(n.id);
+          view = "files";
+          await loadFiles();
+        } catch (e) {
+          toastErr(errText(e));
+        }
+      })();
+    }
+  }
+
+  function goRoot(): void {
+    if (view === "files") {
+      view = "nodes";
+      projectNode = null;
+      clearSelectedFile();
+      return;
+    }
+    stack = [];
+    void loadChildren();
+  }
+
+  function goUp(): void {
+    if (view === "files") {
+      goRoot();
+      return;
+    }
+    if (stack.length === 0) return;
+    stack = stack.slice(0, -1);
+    void loadChildren();
+  }
+
+  function goToDepth(depth: number): void {
+    if (view === "files") {
+      view = "nodes";
+      projectNode = null;
+      clearSelectedFile();
+    }
+    stack = stack.slice(0, depth);
+    void loadChildren();
+  }
+
+  /* ------------------------------------------------------------ 节点操作 */
+
+  function openCreate(kind: "FOLDER" | "PROJECT", parentId: string | null): void {
+    createKind = kind;
+    createParentId = parentId;
+    formName = "";
+    formDesc = "";
+    modal = "create";
+  }
+
+  async function submitCreate(): Promise<void> {
+    const name = formName.trim();
+    if (name === "") return;
+    saving = true;
+    try {
+      await api("/database/api/nodes", {
+        method: "POST",
+        body: {
+          parentId: createParentId,
+          kind: createKind,
+          name,
+          ...(formDesc.trim() !== "" ? { description: formDesc.trim() } : {}),
+        },
+      });
+      toastOk("已创建");
+      modal = null;
+      refresh();
+    } catch (e) {
+      toastErr(errText(e));
+    } finally {
+      saving = false;
+    }
+  }
+
+  function openRename(n: NodeChild): void {
+    renameTarget = n;
+    formName = n.name;
+    modal = "rename";
+  }
+
+  async function submitRename(): Promise<void> {
+    if (renameTarget === null) return;
+    const name = formName.trim();
+    if (name === "" || name === renameTarget.name) return;
+    saving = true;
+    try {
+      await api(`/database/api/nodes/${renameTarget.id}`, { method: "PATCH", body: { name } });
+      toastOk("已重命名");
+      modal = null;
+      refresh();
+    } catch (e) {
+      toastErr(errText(e));
+    } finally {
+      saving = false;
+    }
+  }
+
+  async function removeNode(n: NodeChild): Promise<void> {
+    if (!confirm(`删除「${n.name}」?软删除后不可见。`)) return;
+    try {
+      await api(`/database/api/nodes/${n.id}`, { method: "DELETE" });
+      toastOk("已删除");
+      refresh();
+    } catch (e) {
+      toastErr(errText(e));
+    }
+  }
+
+  async function openGrants(n: NodeChild): Promise<void> {
+    try {
+      detailNode = await fetchDetail(n.id);
+      modal = "grants";
+    } catch (e) {
+      toastErr(errText(e));
+    }
+  }
+
+  async function openDetail(n: NodeChild): Promise<void> {
+    try {
+      detailNode = await fetchDetail(n.id);
+      modal = "detail";
+    } catch (e) {
+      toastErr(errText(e));
+    }
+  }
+
+  /* ------------------------------------------------------------ 文件操作 */
+
+  async function submitNewFile(): Promise<void> {
+    if (projectNode === null) return;
+    const path = newPath.trim();
+    if (path === "") return;
+    saving = true;
+    try {
+      await api(`/database/api/projects/${projectNode.id}/file`, {
+        method: "PUT",
+        body: { path, content: newContent },
+      });
+      toastOk("已创建");
+      modal = null;
+      newPath = ""; newContent = "";
+      await loadFiles();
+    } catch (e) {
+      toastErr(errText(e));
+    } finally {
+      saving = false;
+    }
+  }
+
+  async function removeFile(f: FileEntry): Promise<void> {
+    if (projectNode === null || !confirm(`删除文件 ${f.path}?`)) return;
+    try {
+      const cur = await api<{ version: string }>(
+        `/database/api/projects/${projectNode.id}/file?path=${encodeURIComponent(f.path)}`,
+      );
+      await api(`/database/api/projects/${projectNode.id}/file?path=${encodeURIComponent(f.path)}`, {
+        method: "DELETE",
+        body: { baseVersion: cur.version },
+      });
+      toastOk("已删除");
+      if ($selectedFilePath === f.path) clearSelectedFile();
+      await loadFiles();
+    } catch (e) {
+      toastErr(errText(e));
+    }
+  }
+
+  /* ------------------------------------------------------------ 右键菜单 */
+
+  function nodeMenuItems(n: NodeChild): MenuItem[] {
+    const items: MenuItem[] = [{ label: "打开", icon: "chevron", onclick: () => openNode(n) }];
+    if (n.kind === "FOLDER" && atLeast(n.role, "EDIT")) {
+      items.push({ label: "新建子文件夹", icon: "plus", onclick: () => openCreate("FOLDER", n.id) });
+    }
+    if (n.role === "MANAGE") {
+      items.push(
+        { label: "重命名", icon: "pencil", onclick: () => openRename(n) },
+        { label: "授权管理", icon: "shield", onclick: () => void openGrants(n) },
+      );
+    }
+    items.push({ label: "详情", icon: "info", onclick: () => void openDetail(n) });
+    if (n.role === "MANAGE") {
+      items.push({ label: "删除", icon: "trash", danger: true, onclick: () => void removeNode(n) });
+    }
+    return items;
+  }
+
+  function fileMenuItems(f: FileEntry): MenuItem[] {
+    const items: MenuItem[] = [
+      { label: "打开预览", icon: "chevron", onclick: () => selectedFilePath.set(f.path) },
+      {
+        label: "下载",
+        icon: "download",
+        onclick: () => {
+          if (projectNode === null) return;
+          const a = document.createElement("a");
+          a.href = `/database/api/projects/${projectNode.id}/file/raw?path=${encodeURIComponent(f.path)}`;
+          a.download = "";
+          a.click();
+        },
+      },
+    ];
+    if (projectCanEdit) {
+      items.push({ label: "删除", icon: "trash", danger: true, onclick: () => void removeFile(f) });
+    }
+    return items;
+  }
+
+  function bgMenuItems(): MenuItem[] {
+    const items: MenuItem[] = [];
+    if (view === "nodes" && canCreateHere) {
+      items.push(
+        { label: "新建文件夹", icon: "plus", onclick: () => openCreate("FOLDER", currentFolder?.id ?? null) },
+        { label: "新建项目", icon: "plus", onclick: () => openCreate("PROJECT", currentFolder?.id ?? null) },
+      );
+    }
+    if (view === "files" && projectCanEdit) {
+      items.push({ label: "新建文件", icon: "plus", onclick: () => (modal = "newFile") });
+    }
+    items.push({ label: "刷新", icon: "refresh", onclick: refresh });
+    return items;
+  }
+</script>
+
+<div class="flex min-h-0 flex-1 flex-col">
+  <!-- 顶栏:返回 + 面包屑 + 动作 + 身份 -->
+  <header class="flex shrink-0 items-center gap-2 border-b border-line-soft bg-panel px-5 py-3">
+    {#if view === "files" || stack.length > 0}
+      <button class="btn btn-sm" onclick={goUp} title="返回上级">
+        <Icon name="arrowLeft" size={13} /> 返回
+      </button>
+    {/if}
+    <nav class="flex min-w-0 flex-1 items-center gap-1 text-[13px]">
+      <button
+        class="shrink-0 {view === 'nodes' && stack.length === 0 ? 'font-semibold text-ink' : 'text-ink-3 hover:text-ink'}"
+        onclick={goRoot}
+      >文件库</button>
+      {#each stack as n, i (n.id)}
+        <span class="text-line">/</span>
+        <button
+          class="truncate {view === 'nodes' && i === stack.length - 1
+            ? 'font-semibold text-ink'
+            : 'text-ink-3 hover:text-ink'}"
+          onclick={() => goToDepth(i + 1)}
+        >{n.name}</button>
+      {/each}
+      {#if view === "files" && projectNode}
+        <span class="text-line">/</span>
+        <span class="truncate font-semibold text-ink">{projectNode.name}</span>
+      {/if}
+    </nav>
+
+    {#if view === "nodes" && canCreateHere}
+      <button class="btn btn-sm" onclick={() => openCreate("FOLDER", currentFolder?.id ?? null)}>
+        <Icon name="plus" size={13} /> 新建文件夹
+      </button>
+      <button class="btn btn-sm" onclick={() => openCreate("PROJECT", currentFolder?.id ?? null)}>
+        <Icon name="plus" size={13} /> 新建项目
+      </button>
+    {/if}
+    {#if view === "files" && projectCanEdit}
+      <button class="btn btn-sm" onclick={() => (modal = "newFile")}>
+        <Icon name="plus" size={13} /> 新建文件
+      </button>
+    {/if}
+    <button class="btn btn-sm" onclick={refresh} title="刷新"><Icon name="refresh" size={13} /></button>
+
+    <div class="ml-1 flex shrink-0 items-center gap-2 border-l border-line-soft pl-3">
+      <span class="flex h-6 w-6 items-center justify-center rounded-full bg-accent text-[11px] font-semibold text-white">{initial}</span>
+      <span class="max-w-[120px] truncate text-[12.5px] text-ink">{$me?.displayName ?? $me?.userId ?? ""}</span>
+      <button
+        class="rounded-lg border border-line-soft px-2 py-1 text-[11.5px] text-ink-3 transition hover:bg-hover hover:text-ink"
+        onclick={logout}
+        title="退出登录"
+      >退出</button>
+    </div>
+  </header>
+
+  <!-- 主体:网格 + 文件预览栏 -->
+  <div class="flex min-h-0 flex-1">
+    <main
+      class="flex-1 overflow-y-auto px-6 py-5"
+      role="presentation"
+      oncontextmenu={(e) => { e.preventDefault(); menu = { x: e.clientX, y: e.clientY, items: bgMenuItems() }; }}
+    >
+      {#if view === "nodes"}
+        {#if nodesError !== null}
+          <div class="py-10 text-center text-[13px] text-danger">{nodesError}</div>
+        {:else if children === null}
+          <div class="quiet py-10 text-center">加载中…</div>
+        {:else if children.length === 0}
+          <div class="quiet py-10 text-center">
+            {currentFolder === null ? "空文件库" : "空文件夹"}{canCreateHere ? " · 右键或点上方按钮新建" : ""}
+          </div>
+        {:else}
+          <div class="grid grid-cols-[repeat(auto-fill,minmax(118px,1fr))] gap-x-2 gap-y-4">
+            {#each children as n (n.id)}
+              <GridCard
+                kind={n.kind}
+                name={n.name}
+                meta={ROLE_LABEL[n.role]}
+                selected={selected === n.id}
+                onselect={() => (selected = n.id)}
+                onopen={() => openNode(n)}
+                oncontextmenu={(x, y) => (menu = { x, y, items: nodeMenuItems(n) })}
+              />
+            {/each}
+          </div>
+        {/if}
+      {:else}
+        {#if filesError !== null}
+          <div class="py-10 text-center text-[13px] text-danger">{filesError}</div>
+        {:else if files === null}
+          <div class="quiet py-10 text-center">加载中…</div>
+        {:else if files.length === 0}
+          <div class="quiet py-10 text-center">空仓库{projectCanEdit ? " · 右键或点上方按钮新建文件" : ""}</div>
+        {:else}
+          <div class="grid grid-cols-[repeat(auto-fill,minmax(118px,1fr))] gap-x-2 gap-y-4">
+            {#each files as f (f.path)}
+              <GridCard
+                kind="FILE"
+                name={f.path}
+                meta="{f.size} B"
+                selected={selected === f.path}
+                onselect={() => (selected = f.path)}
+                onopen={() => selectedFilePath.set(f.path)}
+                oncontextmenu={(x, y) => (menu = { x, y, items: fileMenuItems(f) })}
+              />
+            {/each}
+          </div>
+        {/if}
+      {/if}
+    </main>
+
+    {#if view === "files" && $selectedFilePath && projectNode}
+      <section class="flex w-[46%] min-w-[420px] shrink-0 flex-col overflow-y-auto border-l border-line-soft bg-bg p-4">
+        <FileEditor
+          projectId={projectNode.id}
+          path={$selectedFilePath}
+          role={projectNode.role}
+          onchanged={() => void loadFiles()}
+          onclose={clearSelectedFile}
+        />
+      </section>
+    {/if}
+  </div>
+</div>
+
+{#if menu}
+  <ContextMenu x={menu.x} y={menu.y} items={menu.items} onclose={() => (menu = null)} />
+{/if}
+
+{#if modal === "create"}
+  <Modal title={createKind === "FOLDER" ? "新建文件夹" : "新建项目"} onclose={() => (modal = null)}>
+    <div class="form-row">
+      <label class="form-label" for="gc-name">名称</label>
+      <input id="gc-name" class="input" bind:value={formName} placeholder={createKind === "FOLDER" ? "例如:物理" : "例如:微积分基础"} />
+    </div>
+    <div class="form-row">
+      <label class="form-label" for="gc-desc">简介(可选)</label>
+      <textarea id="gc-desc" rows="3" class="textarea" bind:value={formDesc} placeholder="简要说明用途…"></textarea>
+    </div>
+    <div class="mt-4 flex justify-end gap-2">
+      <button class="btn" onclick={() => (modal = null)}>取消</button>
+      <button class="btn btn-primary disabled:opacity-50" onclick={submitCreate} disabled={saving}>
+        {saving ? "创建中…" : "创建"}
+      </button>
+    </div>
+  </Modal>
+{/if}
+
+{#if modal === "rename" && renameTarget}
+  <Modal title="重命名" onclose={() => (modal = null)}>
+    <div class="form-row">
+      <label class="form-label" for="gr-name">新名称</label>
+      <input id="gr-name" class="input" bind:value={formName} />
+    </div>
+    <div class="mt-4 flex justify-end gap-2">
+      <button class="btn" onclick={() => (modal = null)}>取消</button>
+      <button class="btn btn-primary disabled:opacity-50" onclick={submitRename} disabled={saving}>
+        {saving ? "保存中…" : "保存"}
+      </button>
+    </div>
+  </Modal>
+{/if}
+
+{#if modal === "grants" && detailNode}
+  <Modal maxW={880} title="授权管理 · {detailNode.name}" onclose={() => (modal = null)}>
+    <GrantsPanel node={detailNode} />
+  </Modal>
+{/if}
+
+{#if modal === "detail" && detailNode}
+  <Modal maxW={680} title="详情 · {detailNode.name}" onclose={() => (modal = null)}>
+    <OverviewPanel node={detailNode} />
+  </Modal>
+{/if}
+
+{#if modal === "newFile"}
+  <Modal title="新建文件" onclose={() => (modal = null)}>
+    <div class="form-row">
+      <label class="form-label" for="gf-path">路径</label>
+      <input id="gf-path" class="input font-mono" bind:value={newPath} placeholder="讲义/第一章.md" />
+    </div>
+    <div class="form-row">
+      <label class="form-label" for="gf-content">内容</label>
+      <textarea id="gf-content" rows="8" class="textarea" bind:value={newContent} placeholder="内容…"></textarea>
+    </div>
+    <div class="mt-4 flex justify-end gap-2">
+      <button class="btn" onclick={() => (modal = null)}>取消</button>
+      <button class="btn btn-primary disabled:opacity-50" onclick={submitNewFile} disabled={saving}>
+        {saving ? "创建中…" : "创建"}
+      </button>
+    </div>
+  </Modal>
+{/if}

hub/filelib-web/src/lib/Icon.svelte

@@ -16,6 +16,11 @@
     layers: "m12 2 9 5-9 5-9-5 9-5Zm9 11-9 5-9-5m18 5-9 5-9-5",
     clock: "M12 22a10 10 0 1 0 0-20 10 10 0 0 0 0 20Zm0-14v6l4 2",
     minus: "M5 12h14",
+    download: "M12 3v12m0 0 4-4m-4 4-4-4M4 17v2a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2v-2",
+    refresh: "M21 12a9 9 0 1 1-2.64-6.36M21 3v6h-6",
+    arrowLeft: "M19 12H5m0 0 6 6m-6-6 6-6",
+    info: "M12 22a10 10 0 1 0 0-20 10 10 0 0 0 0 20Zm0-10v6m0-11v.5",
+    shield: "M12 3l8 3v6c0 4.5-3.2 7.7-8 9-4.8-1.3-8-4.5-8-9V6l8-3Z",
     // 已归档(软删)标记用;与"删除"区分 —— 数据仍在,只是打了 archivedAt。
     archive: "M3 8h18v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8Zm1-5h16l1 5H3l1-5Zm5 9h6",
     restore: "M3 12a9 9 0 1 0 3-6.7M3 4v4.5h4.5",

hub/filelib-web/src/lib/Modal.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
   import type { Snippet } from "svelte";
 
-  let { title, onclose, children }: { title: string; onclose: () => void; children: Snippet } = $props();
+  let { title, onclose, children, maxW = 440 }: { title: string; onclose: () => void; children: Snippet; maxW?: number } = $props();
 </script>
 
 <div
@@ -9,7 +9,7 @@
   role="presentation"
   onclick={(e) => { if (e.target === e.currentTarget) onclose(); }}
 >
-  <div class="w-full max-w-[440px] rounded-2xl border border-line-soft bg-panel p-6 shadow-[0_4px_20px_rgba(26,26,24,.07)]">
+  <div class="max-h-[88vh] w-full overflow-y-auto rounded-2xl border border-line-soft bg-panel p-6 shadow-[0_4px_20px_rgba(26,26,24,.07)]" style="max-width:{maxW}px">
     <div class="mb-4 text-[15px] font-semibold">{title}</div>
     {@render children()}
   </div>

hub/filelib-web/src/routes/app/+page.svelte

@@ -1,10 +1,10 @@
 <script lang="ts">
-  /** 老师端。未登录显示登录卡片;登录后直接是文件库浏览器。 */
+  /** 老师端。未登录显示登录卡片;登录后是网盘式文件库浏览器。 */
   import { onMount } from "svelte";
   import { me, authChecked } from "$lib/stores.js";
   import { loadSession } from "$lib/session.js";
   import LoginView from "$lib/LoginView.svelte";
-  import LibraryView from "$lib/LibraryView.svelte";
+  import GridLibraryView from "$lib/GridLibraryView.svelte";
 
   onMount(loadSession);
 </script>
@@ -15,7 +15,7 @@
   <div class="flex h-full items-center justify-center text-ink-3">加载中…</div>
 {:else if $me}
   <div class="flex h-full flex-col">
-    <LibraryView showUserFooter />
+    <GridLibraryView />
   </div>
 {:else}
   <LoginView />