feat(web): authed blob image pipeline with LRU, cover card, dir grouping

web/test/authImage.test.ts

@@ -0,0 +1,32 @@
+import { afterEach, beforeEach, expect, it, vi } from "vitest";
+import { setToken } from "../src/api/client";
+import { __resetImageCache, fetchObjectUrl } from "../src/lib/authImage";
+
+beforeEach(() => {
+  __resetImageCache();
+  setToken("T");
+  (URL as any).createObjectURL = vi.fn(() => "blob:gen");
+});
+afterEach(() => vi.unstubAllGlobals());
+
+it("blob → objectURL;同 URL 只发一次请求", async () => {
+  const f = vi.fn(async (_url: any, init: any) => {
+    expect(init.headers.Authorization).toBe("Bearer T");
+    return new Response(new Blob(["img"]), { status: 200 });
+  });
+  vi.stubGlobal("fetch", f);
+  expect(await fetchObjectUrl("/api/books/1/cover?v=h")).toBe("blob:gen");
+  expect(await fetchObjectUrl("/api/books/1/cover?v=h")).toBe("blob:gen");
+  expect(f).toHaveBeenCalledTimes(1);
+});
+
+it("失败不入缓存,重试重新请求", async () => {
+  let n = 0;
+  vi.stubGlobal("fetch", async () => {
+    n++;
+    return n === 1 ? new Response("x", { status: 500 }) : new Response(new Blob(["img"]), { status: 200 });
+  });
+  await expect(fetchObjectUrl("/api/books/2/pages/0?v=h")).rejects.toThrow();
+  expect(await fetchObjectUrl("/api/books/2/pages/0?v=h")).toBe("blob:gen");
+  expect(n).toBe(2);
+});

web/test/group.test.ts

@@ -0,0 +1,20 @@
+import { expect, it } from "vitest";
+import { groupByDir } from "../src/lib/group";
+import type { Book } from "../src/api/types";
+
+let seq = 1;
+const mk = (path: string): Book => ({
+  id: seq++, library_id: 1, path, title: path, format: "cbz", size: 1, mtime: 1, pages: 0,
+  state: "ready", error: "", added_at: "", percent: 0, cover_url: "/api/books/0/cover",
+});
+
+it("根目录组为空串且排最前;目录组按字典序;组内保持输入顺序", () => {
+  const gs = groupByDir([mk("b.cbz"), mk("z/1.cbz"), mk("a/2.cbz"), mk("a/sub/3.cbz")]);
+  expect(gs.map((g) => g.dir)).toEqual(["", "a", "a/sub", "z"]);
+  expect(gs[0].books.map((x) => x.path)).toEqual(["b.cbz"]);
+  expect(gs[1].books.map((x) => x.path)).toEqual(["a/2.cbz"]);
+});
+
+it("空输入出空数组", () => {
+  expect(groupByDir([])).toEqual([]);
+});