fix: side peek des bases repasse en vanilla JS + largeur 1100px standard (v7.49.0)

- Panneau peek: les bindings Alpine (x-data absent du conteneur) rendaient
  loovverture et le redimensionnement inoperants -> cblage direct sur le document.
- Helper unique window.fdWirePeekResize (app.js): pointer capture, 300px-90vw,
  clic=fermer, largeur persiste fd_peek_width partagee entre les 4 peeks.
- database-table-container margin:0 (tableau colle a gauche, marge Library).
- .lib-container remonte dans app.css (trash etait pleine largeur), .db-index 1100px.
- ObsiGate verifie sans code: creation .xlsx OK (openpyxl, #186).

app/services/trash.py

@@ -13,6 +13,10 @@ import re
 from datetime import UTC, datetime, timedelta
 
 from app.db import get_conn
+from app.services.collection_lifecycle import (
+    collections_hosted_by_page,
+    delete_collections,
+)
 
 logger = logging.getLogger(__name__)
 
@@ -57,6 +61,9 @@ def purge_expired(days: int = 30) -> dict:
             if dt is None or dt >= cutoff:
                 continue
             page_id = row["id"]
+            # A purged host page takes its database with it, otherwise the
+            # workspace kept advertising tasks whose document is gone.
+            collections = collections_hosted_by_page(conn, page_id)
             # Promote direct children to the deleted page's parent so no live
             # sub-tree is orphaned (matches the permanent-delete semantics).
             conn.execute(
@@ -65,6 +72,7 @@ def purge_expired(days: int = 30) -> dict:
                 (page_id, page_id),
             )
             conn.execute("DELETE FROM pages WHERE id=?", (page_id,))
+            delete_collections(conn, collections)
             purged.append(page_id)
         conn.commit()
     if purged: