diff --git a/static/app.js b/static/app.js
index 4022f6f..6ba57e3 100644
--- a/static/app.js
+++ b/static/app.js
@@ -77,10 +77,16 @@ async function loadLibraries() {
       (l) => `<tr>
         <td>${esc(l.name)}</td><td>${esc(l.media_type)}</td><td>${esc(l.root_path)}</td>
         <td class="mono">${esc(l.folder_template)}</td><td class="mono">${esc(l.file_template)}</td>
-        <td><button class="danger" data-del-lib="${l.id}">Löschen</button></td>
+        <td class="row">
+          <button class="secondary" data-edit-lib="${l.id}">Bearbeiten</button>
+          <button class="danger" data-del-lib="${l.id}">Löschen</button>
+        </td>
       </tr>`
     )
     .join("");
+  tbody.querySelectorAll("[data-edit-lib]").forEach((b) =>
+    b.addEventListener("click", () => startLibraryEdit(parseInt(b.dataset.editLib)))
+  );
   tbody.querySelectorAll("[data-del-lib]").forEach((b) =>
     b.addEventListener("click", async () => {
       if (!confirm("Library löschen?")) return;
@@ -96,16 +102,48 @@ async function loadLibraries() {
     libraries.map((l) => `<option value="${l.id}">${esc(l.name)}</option>`).join("");
 }
 
+function startLibraryEdit(id) {
+  const lib = libraries.find((l) => l.id === id);
+  if (!lib) return;
+  const form = $("#lib-form");
+  form.name.value = lib.name;
+  form.media_type.value = lib.media_type;
+  form.root_path.value = lib.root_path;
+  form.folder_template.value = lib.folder_template;
+  form.file_template.value = lib.file_template;
+  form.dataset.editId = lib.id;
+  $("#lib-form-title").textContent = `Library „${lib.name}“ bearbeiten`;
+  $("#lib-form-submit").textContent = "Speichern";
+  $("#lib-form-cancel").hidden = false;
+  form.scrollIntoView({ behavior: "smooth" });
+}
+
+function endLibraryEdit() {
+  const form = $("#lib-form");
+  form.reset();
+  delete form.dataset.editId;
+  $("#lib-form-title").textContent = "Neue Library";
+  $("#lib-form-submit").textContent = "Anlegen";
+  $("#lib-form-cancel").hidden = true;
+}
+$("#lib-form-cancel").addEventListener("click", endLibraryEdit);
+
 $("#lib-form").addEventListener("submit", async (e) => {
   e.preventDefault();
   const data = Object.fromEntries(new FormData(e.target));
   if (!data.folder_template) delete data.folder_template;
   if (!data.file_template) delete data.file_template;
+  const editId = e.target.dataset.editId;
   try {
-    await api("/api/libraries", { method: "POST", body: JSON.stringify(data) });
-    e.target.reset();
+    if (editId) {
+      await api("/api/libraries/" + editId, { method: "PUT", body: JSON.stringify(data) });
+      toast("Library gespeichert — gilt für künftige Importe");
+    } else {
+      await api("/api/libraries", { method: "POST", body: JSON.stringify(data) });
+      toast("Library angelegt");
+    }
+    endLibraryEdit();
     loadLibraries();
-    toast("Library angelegt");
   } catch (err) { toast(err.message, true); }
 });
 
@@ -360,6 +398,16 @@ async function bulkDeleteRequests(status) {
 
 $("#imported-bulk-delete").addEventListener("click", () => bulkDeleteRequests("imported"));
 
+function selectAllRequests(status) {
+  const box = status === "missing" ? $("#missing-list") : $("#imported-list");
+  const checks = [...box.querySelectorAll("[data-sel-req]")];
+  const allChecked = checks.length && checks.every((c) => c.checked);
+  checks.forEach((c) => (c.checked = !allChecked));
+  if (checks.length) checks[0].dispatchEvent(new Event("change"));
+}
+$("#missing-select-all").addEventListener("click", () => selectAllRequests("missing"));
+$("#imported-select-all").addEventListener("click", () => selectAllRequests("imported"));
+
 $("#missing-filter-type").addEventListener("change", () => loadRequests("missing"));
 $("#missing-filter-library").addEventListener("change", () => loadRequests("missing"));
 $("#missing-search").addEventListener("input", () => renderRequests("missing"));
diff --git a/static/index.html b/static/index.html
index 555fe62..738650a 100644
--- a/static/index.html
+++ b/static/index.html
@@ -87,6 +87,7 @@
             <option value="">Alle Libraries</option>
           </select>
           <input id="missing-search" placeholder="Filtern (Titel/Autor/Serie)…" />
+          <button id="missing-select-all" class="secondary">Alle auswählen</button>
           <button id="missing-bulk-delete" class="danger" hidden>
             Ausgewählte entfernen
           </button>
@@ -102,6 +103,7 @@
       <section id="view-imported" hidden>
         <div class="bar wrap">
           <input id="imported-search" placeholder="Filtern (Titel/Autor/Serie)…" />
+          <button id="imported-select-all" class="secondary">Alle auswählen</button>
           <button id="imported-bulk-delete" class="danger" hidden>
             Ausgewählte entfernen
           </button>
@@ -203,7 +205,7 @@
             <tbody></tbody>
           </table>
         </div>
-        <h4>Neue Library</h4>
+        <h4 id="lib-form-title">Neue Library</h4>
         <form id="lib-form" class="bar wrap">
           <input name="name" placeholder="Name (z.B. Kids)" required />
           <select name="media_type">
@@ -227,7 +229,10 @@
             name="file_template"
             placeholder="Datei-Schema (optional)"
             class="wide" />
-          <button type="submit">Anlegen</button>
+          <button type="submit" id="lib-form-submit">Anlegen</button>
+          <button type="button" id="lib-form-cancel" class="secondary" hidden>
+            Abbrechen
+          </button>
         </form>
         <p class="muted">
           Platzhalter: {Author} {Authors} {Narrator} {Title} {Year} {Series}