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/calendar_sync.py

@@ -278,6 +278,12 @@ def _row_date(values: dict, prop_id: str, prop_name: str) -> str:
     return str(raw or "")
 
 
+# Public aliases — read-only helpers reused by the router layer (sidebar
+# "Meeting" tab needs the date property + value of a collection row).
+date_prop_id = _date_prop_id
+row_date = _row_date
+
+
 def _to_epoch(value: str | None) -> float:
     if not value:
         return 0.0