fix: gate event edits through the approval workflow

The PUT /events/{id} endpoint blindly copied every field from the
request body onto the existing event, including `status`. A non-admin
owner with auto_approve=false could PUT {"status": "approved", ...}
and self-approve, bypassing review entirely.

Replace the blanket setattr loop with an explicit field list (status
omitted) and derive the new status from the same admin / auto_approve
gate that api_event_create uses. Reconcile Nostr against the status
transition:
  approved → approved : re-publish the replaceable NIP-52 event
  proposed → approved : fresh publish
  approved → proposed : NIP-09 delete so the public feed drops it
                        until the edit is re-approved
  proposed → proposed : no-op

Also apply the same end/closing-date defaulting as create_event so an
edit that omits those fields doesn't wipe them.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

views_api.py

@@ -203,6 +203,18 @@ async def api_event_update(
     data: CreateEvent,
     wallet: WalletTypeInfo = Depends(require_admin_key),
 ) -> Event:
+    """Update an event. The owner can edit any mutable field; the status
+    is derived (admin / `auto_approve` ⇒ approved, otherwise proposed)
+    and is NEVER taken from the request body — that would let owners
+    self-approve.
+
+    Nostr is reconciled against the status transition:
+      approved → approved : re-publish the replaceable NIP-52 event
+      proposed → approved : fresh publish
+      approved → proposed : NIP-09 delete so the public feed drops it
+                            until the edit is re-approved
+      proposed → proposed : no-op
+    """
     event = await get_event(event_id)
     if not event:
         raise HTTPException(
@@ -210,13 +222,49 @@ async def api_event_update(
         )
     if event.wallet != wallet.wallet.id:
         raise HTTPException(status_code=HTTPStatus.FORBIDDEN, detail="Not your event.")
-    for k, v in data.dict().items():
-        setattr(event, k, v)
+
+    from lnbits.settings import settings
+
+    ext_settings = await get_settings()
+    user_id = wallet.wallet.user
+    is_admin = user_id == settings.super_user or user_id in settings.lnbits_admin_users
+
+    previous_status = event.status
+
+    # Same defaulting as create_event: optional end/closing dates fall
+    # back to start_date when omitted, so an edit that doesn't restate
+    # them doesn't wipe them.
+    if not data.event_end_date:
+        data.event_end_date = data.event_start_date
+    if not data.closing_date:
+        data.closing_date = data.event_end_date
+
+    # Explicit field list — never copy `status` from the request body.
+    for field in (
+        "name",
+        "info",
+        "closing_date",
+        "event_start_date",
+        "event_end_date",
+        "currency",
+        "amount_tickets",
+        "price_per_ticket",
+        "banner",
+        "location",
+        "categories",
+        "extra",
+    ):
+        setattr(event, field, getattr(data, field))
+
+    event.status = "approved" if (is_admin or ext_settings.auto_approve) else "proposed"
+
     event = await update_event(event)
 
-    # Re-publish the replaceable NIP-52 event if we already announced it.
-    if event.status == "approved" and event.nostr_event_id:
+    if event.status == "approved":
         await publish_or_delete_nostr_event(event)
+    elif previous_status == "approved":
+        # Take it down from the public feed while it waits for re-approval.
+        await publish_or_delete_nostr_event(event, delete=True)
 
     return event