feat(diarization-ui): add multi-select bulk actions to library view

Add checkboxes to each row, select-all/deselect-all controls, and a
bulk action bar for moving or deleting multiple documents at once.
New endpoints: POST /documents/bulk-move and /documents/bulk-delete.

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

app.py

@@ -5,7 +5,7 @@ import threading
 from concurrent.futures import ThreadPoolExecutor
 from datetime import datetime
 from pathlib import Path
-from typing import Optional
+from typing import List, Optional
 
 import markdown as md
 import requests
@@ -561,6 +561,7 @@ def library(project_id: Optional[str] = None, q_title: str = "", q_content: str
     rows = "".join(
         [
             f"<tr>"
+            f"<td class='cb-cell'><input type='checkbox' class='row-cb' value='{d['id']}'></td>"
             f"<td>#{d['id']}</td>"
             f"<td>{d['title']}</td>"
             f"<td>{d['kind']}</td>"
@@ -587,6 +588,10 @@ def library(project_id: Optional[str] = None, q_title: str = "", q_content: str
 .grid th,.grid td{{padding:10px 12px;border-bottom:1px solid #1f2937;text-align:left}}
 .grid th{{position:sticky;top:0;background:#0b1222;color:#94a3b8;font-size:12px;text-transform:uppercase;letter-spacing:.04em}}
 .grid tr:hover{{background:rgba(56,189,248,.06)}}
+.grid tr.selected{{background:rgba(56,189,248,.12)}}
+.cb-cell{{width:32px;padding:10px 4px 10px 12px}}
+.bulk-bar{{display:none;gap:8px;align-items:center;padding:8px 12px;background:rgba(56,189,248,.08);border-radius:6px;margin-bottom:8px}}
+.bulk-bar.active{{display:flex}}
 </style>
 <h2 style='margin-bottom:6px'>Projekte · Dokumente</h2>
 <div class='hint' style='margin-bottom:10px'>Ansicht im Projektlisten-Stil mit Schnellaktionen.</div>
@@ -599,18 +604,72 @@ def library(project_id: Optional[str] = None, q_title: str = "", q_content: str
   <div class='spacer'></div>
   <small>{len(docs)} Treffer</small>
 </form>
+<div class='bulk-bar' id='bulkBar'>
+  <strong id='bulkCount'>0 ausgewählt</strong>
+  <button type='button' onclick='bulkMove()'>📁 Verschieben</button>
+  <button type='button' onclick='bulkDelete()' style='color:#f87171'>🗑️ Löschen</button>
+</div>
 <div class='card gridcard'>
   <table class='grid'>
-    <thead><tr><th>ID</th><th>Titel</th><th>Typ</th><th>Projekt</th><th>Erstellt</th><th>Aktionen</th></tr></thead>
-    <tbody>{rows or "<tr><td colspan='6'>Keine Einträge.</td></tr>"}</tbody>
+    <thead><tr>
+      <th class='cb-cell'><input type='checkbox' id='cbAll' title='Alle wählen'></th>
+      <th>ID</th><th>Titel</th><th>Typ</th><th>Projekt</th><th>Erstellt</th><th>Aktionen</th>
+    </tr></thead>
+    <tbody>{rows or "<tr><td colspan='7'>Keine Einträge.</td></tr>"}</tbody>
   </table>
 </div>
+<div style='display:flex;gap:8px;margin-top:8px'>
+  <button type='button' onclick='selectAll()'>Alle wählen</button>
+  <button type='button' onclick='selectNone()'>Alle abwählen</button>
+</div>
 <script>
 async function libPost(url, data) {{
   const r = await fetch(url, {{method:'POST', headers:{{'Content-Type':'application/x-www-form-urlencoded'}}, body:new URLSearchParams(data)}});
   if(!r.ok) {{ alert('Fehler '+r.status); return; }}
   location.reload();
 }}
+async function libPostMulti(url, params) {{
+  const body = new URLSearchParams();
+  for(const [k,v] of Object.entries(params)) {{
+    if(Array.isArray(v)) v.forEach(x => body.append(k, x));
+    else body.append(k, v);
+  }}
+  const r = await fetch(url, {{method:'POST', headers:{{'Content-Type':'application/x-www-form-urlencoded'}}, body}});
+  if(!r.ok) {{ alert('Fehler '+r.status); return; }}
+  location.reload();
+}}
+function getSelected() {{
+  return [...document.querySelectorAll('.row-cb:checked')].map(cb => cb.value);
+}}
+function updateBulkBar() {{
+  const ids = getSelected();
+  const bar = document.getElementById('bulkBar');
+  document.getElementById('bulkCount').textContent = ids.length + ' ausgewählt';
+  bar.classList.toggle('active', ids.length > 0);
+  document.getElementById('cbAll').indeterminate = ids.length > 0 && ids.length < document.querySelectorAll('.row-cb').length;
+  document.getElementById('cbAll').checked = ids.length > 0 && ids.length === document.querySelectorAll('.row-cb').length;
+}}
+document.querySelectorAll('.row-cb').forEach(cb => {{
+  cb.addEventListener('change', function() {{
+    this.closest('tr').classList.toggle('selected', this.checked);
+    updateBulkBar();
+  }});
+}});
+document.getElementById('cbAll').addEventListener('change', function() {{
+  document.querySelectorAll('.row-cb').forEach(cb => {{
+    cb.checked = this.checked;
+    cb.closest('tr').classList.toggle('selected', this.checked);
+  }});
+  updateBulkBar();
+}});
+function selectAll() {{
+  document.querySelectorAll('.row-cb').forEach(cb => {{ cb.checked=true; cb.closest('tr').classList.add('selected'); }});
+  updateBulkBar();
+}}
+function selectNone() {{
+  document.querySelectorAll('.row-cb').forEach(cb => {{ cb.checked=false; cb.closest('tr').classList.remove('selected'); }});
+  updateBulkBar();
+}}
 window.libRename = async function(id, current) {{
   const v = await window.uiPrompt('Dokument umbenennen', current || '');
   if(v===null) return;
@@ -627,6 +686,21 @@ window.libDelete = async function(id) {{
   if(!ok) return;
   await libPost(`/document/${{id}}/delete`, {{}});
 }};
+window.bulkMove = async function() {{
+  const ids = getSelected();
+  if(!ids.length) return;
+  const options = {project_js};
+  const v = await window.uiSelect(`${{ids.length}} Dokumente verschieben`, options, 'Projekt wählen');
+  if(v===null || v==='') return;
+  await libPostMulti('/documents/bulk-move', {{ids, project_id:v}});
+}};
+window.bulkDelete = async function() {{
+  const ids = getSelected();
+  if(!ids.length) return;
+  const ok = await window.uiConfirm(`${{ids.length}} Dokumente löschen?`);
+  if(!ok) return;
+  await libPostMulti('/documents/bulk-delete', {{ids}});
+}};
 </script>
 """
     return layout("Library", body)
@@ -730,6 +804,20 @@ def delete_document(doc_id: int):
     return HTMLResponse("<meta http-equiv='refresh' content='0; url=/library'>")
 
 
+@app.post("/documents/bulk-move", response_class=HTMLResponse)
+def bulk_move_documents(ids: List[int] = Form(...), project_id: int = Form(...)):
+    with db() as c:
+        c.executemany("UPDATE documents SET project_id=? WHERE id=?", [(project_id, i) for i in ids])
+    return HTMLResponse("<meta http-equiv='refresh' content='0; url=/library'>")
+
+
+@app.post("/documents/bulk-delete", response_class=HTMLResponse)
+def bulk_delete_documents(ids: List[int] = Form(...)):
+    with db() as c:
+        c.executemany("DELETE FROM documents WHERE id=?", [(i,) for i in ids])
+    return HTMLResponse("<meta http-equiv='refresh' content='0; url=/library'>")
+
+
 @app.get("/prompts", response_class=HTMLResponse)
 def prompts_page():
     with db() as c: