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/routers/api_v2/collections.py

@@ -27,6 +27,7 @@ from app.services.api_v2_helpers import (  # noqa: F401 — require_scope est ut
 )
 from app.services.automations import fire_event as _fire_event
 from app.services.automations import run_event_sync
+from app.services.collection_lifecycle import delete_collections
 
 from ._common import _v2_rate_check
 
@@ -152,7 +153,7 @@ def delete_collection_v2(collection_id: int, request: Request, authorization: st
         row = conn.execute("SELECT * FROM collections WHERE id=?", (collection_id,)).fetchone()
         if not row:
             raise HTTPException(404, "Collection not found")
-        conn.execute("DELETE FROM collections WHERE id=?", (collection_id,))
+        delete_collections(conn, [collection_id])
         conn.commit()
     audit_log(user, "collection.delete", "collection", collection_id, "", request)
     return {"id": collection_id, "status": "deleted"}