Add bulk import for spelling lists and flashcard decks

Paste multiple lists/decks in one shot using # Name headers:
  # Week 1
  word1
  word2 | example sentence

  # Week 2
  ...

An optional group field applies to all imported items at once.
Progress shown inline; list/deck panel refreshes on completion.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

public/admin.html

@@ -298,6 +298,21 @@
           </form>
         </details>
 
+        <details id="list-bulk-details">
+          <summary>Bulk import lists</summary>
+          <div class="admin-card">
+            <p class="hint" style="margin:0 0 0.5rem">Start each list with <strong># List name</strong> on its own line, then words below it. Optional group applies to all imported lists.</p>
+            <input id="list-bulk-group" placeholder="Group (e.g. Bible 6) — optional" aria-label="Group for bulk import" list="list-groups-datalist">
+            <textarea id="list-bulk-text" rows="12"
+              placeholder="# Week 1&#10;because&#10;enough&#10;friend&#10;&#10;# Week 2&#10;receive | Did you receive my letter?&#10;achieve&#10;believe"></textarea>
+            <div class="row-actions">
+              <button type="button" id="list-bulk-save">Import all lists</button>
+              <button type="button" id="list-bulk-clear" class="secondary">Clear</button>
+            </div>
+            <p id="list-bulk-status" class="hint" style="margin:0.4rem 0 0"></p>
+          </div>
+        </details>
+
         <h2>Test results</h2>
         <div id="results-area"></div>
       </section>
@@ -321,6 +336,21 @@
             </div>
           </form>
         </details>
+
+        <details id="deck-bulk-details">
+          <summary>Bulk import decks</summary>
+          <div class="admin-card">
+            <p class="hint" style="margin:0 0 0.5rem">Start each deck with <strong># Deck name</strong> on its own line, then cards below as <strong>front | back</strong>. Optional group applies to all imported decks.</p>
+            <input id="deck-bulk-group" placeholder="Group (e.g. Bible 6) — optional" aria-label="Group for bulk import" list="deck-groups-datalist">
+            <textarea id="deck-bulk-text" rows="12"
+              placeholder="# Chapter 1 Vocab&#10;What is photosynthesis? | The process plants use to make food&#10;What does chlorophyll do? | Absorbs light&#10;&#10;# Chapter 2 Vocab&#10;What is mitosis? | Cell division producing identical cells"></textarea>
+            <div class="row-actions">
+              <button type="button" id="deck-bulk-save">Import all decks</button>
+              <button type="button" id="deck-bulk-clear" class="secondary">Clear</button>
+            </div>
+            <p id="deck-bulk-status" class="hint" style="margin:0.4rem 0 0"></p>
+          </div>
+        </details>
       </section>
 
       <!-- Settings -->

public/admin.js

@@ -1410,6 +1410,49 @@ function clearListForm() {
   $('#list-editor-title').textContent = 'New list';
 }
 
+function parseBulkSections(text) {
+  const sections = [];
+  let current = null;
+  for (const raw of text.split('\n')) {
+    const line = raw.trim();
+    if (line.startsWith('#')) {
+      if (current) sections.push(current);
+      current = { name: line.replace(/^#+\s*/, ''), lines: [] };
+    } else if (current && line) {
+      current.lines.push(line);
+    }
+  }
+  if (current) sections.push(current);
+  return sections;
+}
+
+$('#list-bulk-save').addEventListener('click', async () => {
+  const groupName = $('#list-bulk-group').value.trim();
+  const sections = parseBulkSections($('#list-bulk-text').value);
+  if (sections.length === 0) return ($('#list-bulk-status').textContent = 'Paste at least one # Section with words below it.');
+  const statusEl = $('#list-bulk-status');
+  statusEl.textContent = `Importing ${sections.length} list(s)…`;
+  let done = 0;
+  for (const sec of sections) {
+    const words = sec.lines.map((line) => {
+      const [word, sentence = ''] = line.split('|').map((p) => p.trim());
+      return { word, sentence };
+    }).filter((w) => w.word);
+    if (!words.length) continue;
+    await api('/api/lists', { method: 'POST', body: { name: sec.name, words, groupName } });
+    done++;
+    statusEl.textContent = `Imported ${done} of ${sections.length}…`;
+  }
+  statusEl.textContent = `Done! ${done} list(s) imported.`;
+  $('#list-bulk-text').value = '';
+  loadSpelling();
+});
+$('#list-bulk-clear').addEventListener('click', () => {
+  $('#list-bulk-text').value = '';
+  $('#list-bulk-group').value = '';
+  $('#list-bulk-status').textContent = '';
+});
+
 function renderResults(students) {
   $('#results-area').innerHTML = students
     .map((s) => {
@@ -1559,6 +1602,33 @@ function clearDeckForm() {
   $('#deck-editor-title').textContent = 'New deck';
 }
 
+$('#deck-bulk-save').addEventListener('click', async () => {
+  const groupName = $('#deck-bulk-group').value.trim();
+  const sections = parseBulkSections($('#deck-bulk-text').value);
+  if (sections.length === 0) return ($('#deck-bulk-status').textContent = 'Paste at least one # Section with cards below it.');
+  const statusEl = $('#deck-bulk-status');
+  statusEl.textContent = `Importing ${sections.length} deck(s)…`;
+  let done = 0;
+  for (const sec of sections) {
+    const cards = sec.lines.map((line) => {
+      const [front, back = ''] = line.split('|').map((p) => p.trim());
+      return { front, back };
+    }).filter((c) => c.front);
+    if (!cards.length) continue;
+    await api('/api/decks', { method: 'POST', body: { name: sec.name, cards, groupName } });
+    done++;
+    statusEl.textContent = `Imported ${done} of ${sections.length}…`;
+  }
+  statusEl.textContent = `Done! ${done} deck(s) imported.`;
+  $('#deck-bulk-text').value = '';
+  loadDecks();
+});
+$('#deck-bulk-clear').addEventListener('click', () => {
+  $('#deck-bulk-text').value = '';
+  $('#deck-bulk-group').value = '';
+  $('#deck-bulk-status').textContent = '';
+});
+
 // ============================================================
 // Settings
 // ============================================================