fix(import): re-offer imported requests whose files left the library

static/app.js

@@ -649,6 +649,7 @@ $("#detail-form").addEventListener("submit", async (e) => {
 let scanItems = [];
 let missingReqs = [];
 let importedReqs = [];
+let orphanedIds = new Set();   // imported, but their files are gone from the library
 let viewIdx = []; // indices into scanItems after filter/sort
 let importPage = 0;
 const IMPORT_PAGE_SIZE = 25;
@@ -670,8 +671,10 @@ $("#scan-btn").addEventListener("click", async () => {
       item.request_id = item.suggested_request_id;
       item.checked = !!item.suggested_request_id;
     });
-    missingReqs = reqs;
-    importedReqs = done;
+    orphanedIds = new Set(scan.orphaned_request_ids || []);
+    // an imported title whose files vanished is selectable like an open one
+    missingReqs = [...reqs, ...done.filter((r) => orphanedIds.has(r.id))];
+    importedReqs = done.filter((r) => !orphanedIds.has(r.id));
     importPage = 0;
     $("#scan-info").textContent = `${scan.items.length} Kandidat(en) in ${scan.download_dir}`;
     $("#import-toolbar").hidden = scanItems.length === 0;
@@ -734,7 +737,7 @@ function renderImportTable() {
           ${esc(r.title)} — ${esc(r.authors)} (${esc(r.library_name)})${suffix}</option>`;
       const opts = missingReqs
         .filter((r) => r.media_type === item.media_type)
-        .map((r) => option(r))
+        .map((r) => option(r, orphanedIds.has(r.id) ? " ↺" : ""))
         .join("");
       // already imported audiobooks can take further parts (a late CD, or one
       // that failed while its siblings went through)
@@ -1151,7 +1154,7 @@ function collapseSharedRequests(chosen) {
     is_dir: group.length > 1 ? true : group[0].is_dir,
     files: group.flatMap((it) => it.files),
     request_id: group[0].request_id,
-    append: importedReqs.some((r) => r.id === group[0].request_id),
+    append: importedReqs.some((r) => r.id === group[0].request_id),  // orphans re-import
   }));
 }