refactor(series): drop the TS rendering twin; library switch navigates SSR

web/src/series.ts carried a full TypeScript twin of the templ page —
cards and paginator rendered via innerHTML from /api/series JSON,
always hardcoded to page 1. Combined with the header restore dispatch
(previous commit) it made every /series load stomp server-rendered
pagination back to page 1, which is the paginator bug reported on prod
(9 pages of series, Next kept landing on page 1, per-library only).

Rendering ownership (AGENTS.md): this page now has NO client renderer.
- grid and paginator are rendered only by templates/series.templ
- a library switch is a plain SSR navigation to
  /series?library_id=...&page=1, keeping the URL the single source of
  truth for both library and page state
- drops the duplicate /api/series fetch that ran on every page load

rendering-allowlist.txt: series.ts baseline entry removed — the file
no longer builds HTML anywhere.

web/src/rendering-allowlist.txt

@@ -20,7 +20,6 @@ web/src/dom.ts:1
 web/src/password_validation.ts:1
 web/src/queue.ts:3
 web/src/search.ts:4
-web/src/series.ts:1
 web/src/setup.ts:1
 web/src/stats.ts:9
 web/src/toast.ts:2

web/src/series.ts

@@ -1,128 +1,22 @@
 import { Alpine } from "./alpine";
-import { showToast } from "./toast";
-import { initLibrarySwitcher, switchWithTransition } from "./library-switcher";
+import { initLibrarySwitcher } from "./library-switcher";
 
-interface SeriesItem {
-  name: string;
-  library_id: string;
-  book_count: number;
-  total_in_series: number;
-  cover_paths: string[];
-  last_entry_at: string;
-}
-
-function renderSeriesCard(series: SeriesItem): string {
-  const href = `/series/detail?name=${encodeURIComponent(series.name)}&library_id=${encodeURIComponent(series.library_id ?? "")}`;
-  const coverCount = series.cover_paths.length;
-  const coverClass = `cover-count-${coverCount}`;
-
-  let coversHtml = "";
-  for (let i = 0; i < coverCount; i++) {
-    coversHtml += `<img src="${series.cover_paths[i]}" class="cover-img cover-${i}" alt="${series.name}" loading="lazy" onerror="this.src='/static/placeholder-book.svg'">`;
-  }
-
-  if (coverCount === 0) {
-    coversHtml = `<div class="cover-img cover-0 flex items-center justify-center" style="background: var(--bg-primary);"><span class="text-3xl">📚</span></div>`;
-  }
-
-  return `
-    <a href="${href}" class="block">
-      <div class="series-card rounded-lg overflow-hidden cursor-pointer hover:shadow-lg transition-shadow" style="background-color: var(--bg-secondary);">
-        <div class="stacked-covers ${coverClass}">
-          ${coversHtml}
-        </div>
-        <div class="series-card-info px-3 py-2">
-          <h3 class="font-semibold text-sm line-clamp-2" style="color: var(--text-primary)">${series.name}</h3>
-          <p class="text-xs mt-1" style="color: var(--text-secondary)">
-            ${series.book_count} of ${series.total_in_series} books
-          </p>
-        </div>
-      </div>
-    </a>`;
-}
-
-function renderSeriesContent(
-  seriesList: SeriesItem[],
-  libraryId: string,
-  totalPages: number,
-  currentPage: number,
-): string {
-  if (seriesList.length === 0) {
-    return `
-      <main class="w-full px-4 py-8">
-        <h1 class="text-3xl font-bold mb-6" style="color: var(--text-primary)">Series</h1>
-        <div class="text-center py-16" style="color: var(--text-secondary)">
-          <div class="text-6xl mb-4">📚</div>
-          <h3 class="text-xl font-semibold mb-2" style="color: var(--text-primary)">No Series Found</h3>
-          <p>Books with series metadata will appear here</p>
-        </div>
-      </main>`;
-  }
-
-  const cardsHtml = seriesList.map((s) => renderSeriesCard(s)).join("");
-
-  let paginationHtml = "";
-  if (totalPages > 1) {
-    const libParam = libraryId ? `library_id=${libraryId}&` : "";
-    const prevLink =
-      currentPage > 1
-        ? `<a href="/series?${libParam}page=${currentPage - 1}" class="px-4 py-2 rounded-lg border" style="border-color: var(--border); color: var(--text-primary);">← Previous</a>`
-        : "";
-    const nextLink =
-      currentPage < totalPages
-        ? `<a href="/series?${libParam}page=${currentPage + 1}" class="px-4 py-2 rounded-lg border" style="border-color: var(--border); color: var(--text-primary);">Next →</a>`
-        : "";
-    paginationHtml = `
-      <div class="flex justify-center items-center gap-4 mt-8">
-        ${prevLink}
-        <span class="text-sm" style="color: var(--text-secondary)">Page ${currentPage} of ${totalPages}</span>
-        ${nextLink}
-      </div>`;
-  }
-
-  return `
-    <main class="w-full px-4 py-8">
-      <h1 class="text-3xl font-bold mb-6" style="color: var(--text-primary)">Series</h1>
-      <div class="grid grid-cols-2 md:grid-cols-4 lg:grid-cols-6 gap-6">
-        ${cardsHtml}
-      </div>
-      ${paginationHtml}
-    </main>`;
-}
-
-async function switchLibrary(libraryId: string): Promise<void> {
-  await switchWithTransition("series-container", async () => {
-    const param = libraryId ? `library_id=${libraryId}&` : "";
-    const response = await fetch(
-      `/api/series?${param}limit=24&offset=0`,
-      {
-        headers: {
-          Authorization: `Bearer ${localStorage.getItem("token")}`,
-          "Content-Type": "application/json",
-        },
-      },
-    );
-
-    if (!response.ok) {
-      throw new Error("Failed to load series");
-    }
-
-    const data = await response.json();
-    const seriesList: SeriesItem[] = data.series || [];
-    const total: number = data.total || 0;
-    const totalPages = Math.max(1, Math.ceil(total / 24));
-
-    const container = document.getElementById("series-container");
-    if (container) {
-      container.innerHTML = renderSeriesContent(seriesList, libraryId, totalPages, 1);
-    }
-  });
+// Rendering ownership (AGENTS.md): the series grid and its paginator are
+// rendered by templates/series.templ. This page intentionally has NO
+// TypeScript renderer — the old one here duplicated the templ markup via
+// innerHTML and re-fetched at hardcoded page 1, stomping SSR pagination
+// whenever the header's library restore fired. A library switch is a plain
+// SSR navigation so the URL stays the single source of truth for
+// library_id and page state.
+function navigateToSeries(libraryId: string): void {
+  const param = libraryId ? `library_id=${encodeURIComponent(libraryId)}&` : "";
+  window.location.href = `/series?${param}page=1`;
 }
 
 Alpine.data("seriesPage", () => ({
   initSeriesPage() {
     initLibrarySwitcher({
-      onSwitch: switchLibrary,
+      onSwitch: navigateToSeries,
     });
   },
 }));