add(import): merge multi-part entries into one audiobook

static/app.js

@@ -711,12 +711,14 @@ function renderImportTable() {
         <td><input type="checkbox" data-check="${i}" ${item.checked ? "checked" : ""}></td>
         <td class="mono">
           ${esc(item.name)}${item.is_dir ? " 📁" : ""}
+          ${item.parts ? `<span class="tag">${item.parts.length} Teile · ${item.files.length} Dateien</span>` : ""}
           ${item.rel_dir ? `<div class="subpath">${esc(item.rel_dir)}/</div>` : ""}
         </td>
         <td>${esc(item.media_type)}</td>
         <td class="row">
           <select data-select="${i}"><option value="">— überspringen —</option>${opts}</select>
           <button class="secondary" data-quick="${i}" title="Metadaten suchen und Anfrage direkt verbinden">🔍</button>
+          ${item.parts ? `<button class="secondary" data-split="${i}" title="Zusammenfassung wieder auflösen">✂️</button>` : ""}
         </td>
         ${scoreCell(item)}
       </tr>`;
@@ -728,6 +730,9 @@ function renderImportTable() {
   tbody.querySelectorAll("[data-quick]").forEach((b) =>
     b.addEventListener("click", () => openQuickDialog(parseInt(b.dataset.quick)))
   );
+  tbody.querySelectorAll("[data-split]").forEach((b) =>
+    b.addEventListener("click", () => splitMergedItem(parseInt(b.dataset.split)))
+  );
   tbody.querySelectorAll("[data-check]").forEach((c) =>
     c.addEventListener("change", () => {
       scanItems[c.dataset.check].checked = c.checked;
@@ -783,6 +788,62 @@ $("#import-deselect-all").addEventListener("click", () => {
   renderImportTable();
 });
 
+// ---- multi-part episodes: import several entries as one audiobook ----
+// e.g. "100 - Toteninsel Teil 1/2/3", which Audible lists as a single title
+function commonPrefix(names) {
+  let prefix = names[0];
+  for (const n of names.slice(1)) {
+    let i = 0;
+    while (i < prefix.length && i < n.length && prefix[i] === n[i]) i++;
+    prefix = prefix.slice(0, i);
+  }
+  // drop a dangling part marker: "100 - Toteninsel Teil " -> "100 - Toteninsel"
+  return prefix.replace(/[\s._\-–—:]*(?:teil|part|cd|disc|folge)?[\s._\-–—:]*$/i, "").trim();
+}
+
+$("#import-merge").addEventListener("click", () => {
+  const chosen = scanItems.filter((it) => it.checked);
+  if (chosen.length < 2) {
+    toast("Mindestens zwei Einträge auswählen", true);
+    return;
+  }
+  if (new Set(chosen.map((it) => it.media_type)).size > 1) {
+    toast("Nur Einträge desselben Typs lassen sich zusammenfassen", true);
+    return;
+  }
+  const parents = new Set(chosen.map((it) => it.rel_dir));
+  if (parents.size > 1) {
+    toast("Die Einträge liegen in verschiedenen Ordnern", true);
+    return;
+  }
+  const name = commonPrefix(chosen.map((it) => it.name)) || chosen[0].name;
+  const merged = {
+    path: chosen[0].path.slice(0, chosen[0].path.length - chosen[0].name.length - 1) || chosen[0].path,
+    name,
+    rel_dir: chosen[0].rel_dir,
+    media_type: chosen[0].media_type,
+    is_dir: true,
+    files: chosen.flatMap((it) => it.files),
+    checked: true,
+    request_id: chosen.find((it) => it.request_id)?.request_id ?? null,
+    suggested_request_id: chosen.find((it) => it.suggested_request_id)?.suggested_request_id ?? null,
+    score: Math.max(...chosen.map((it) => it.score ?? 0)),
+    parts: chosen,
+  };
+  const first = scanItems.indexOf(chosen[0]);
+  scanItems = scanItems.filter((it) => !chosen.includes(it));
+  scanItems.splice(first, 0, merged);
+  toast(`${chosen.length} Einträge als „${name}" zusammengefasst (${merged.files.length} Dateien)`);
+  renderImportTable();
+});
+
+function splitMergedItem(i) {
+  const item = scanItems[i];
+  if (!item.parts) return;
+  scanItems.splice(i, 1, ...item.parts);
+  renderImportTable();
+}
+
 // ---- quick request from a scanned file ----
 let quickItemIndex = null;
 let quickEpisode = null;

static/index.html

@@ -162,6 +162,9 @@
           <button id="import-deselect-all" class="secondary">
             Alle abwählen
           </button>
+          <button id="import-merge" class="secondary" title="Mehrteiler: ausgewählte Einträge als ein Hörbuch importieren">
+            Ausgewählte zusammenfassen
+          </button>
         </div>
         <div class="table-scroll">
           <table id="import-table" hidden>

static/style.css

@@ -54,6 +54,7 @@ button:disabled { opacity: 0.6; cursor: default; }
 .muted { color: var(--muted); font-size: 0.88rem; }
 .mono { font-family: ui-monospace, monospace; font-size: 0.85rem; word-break: break-all; }
 .subpath { color: var(--muted); font-size: 0.75rem; font-family: ui-monospace, monospace; }
+.tag { display: inline-block; margin-left: 0.4rem; padding: 0.05rem 0.4rem; border-radius: 4px; background: var(--accent); color: #fff; font-size: 0.7rem; font-family: system-ui, sans-serif; vertical-align: 0.1em; }
 
 /* view modes (Missing/Importiert) */
 .view-toggle { display: flex; gap: 0; border: 1px solid var(--border); border-radius: 4px; overflow: hidden; margin-left: auto; }