feat: add event approval workflow with admin UI

Non-admin event submissions now land in a "proposed" queue that LNbits
admins review before the event becomes ticketable and publicly listed.

- m008 adds events.events.status (proposed/approved/rejected); m010 seeds
  an events.settings singleton row with the auto_approve toggle.
- Models: Event/CreateEvent.status, EventsSettings, optional date fields
  with sensible defaults (closing_date defaults to event_end_date which
  defaults to event_start_date), PublicEvent.status surfaces the workflow
  state on the public endpoint.
- crud: get_all/public/pending_events for the admin views; get/update_settings
  for the auto_approve toggle; create_event auto-fills missing date defaults.
- views_api:
  * POST /api/v1/events accepts wallet invoice keys so anyone can submit;
    handler stamps status="proposed" for non-admins when auto_approve is off
  * /public, /all, /pending, /settings (GET+PUT), /{id}/{approve,reject},
    /{id}/tickets endpoints; literal-prefix routes declared before /{event_id}
    so FastAPI matches them correctly
  * Public GET /{event_id} bypasses sold-out / closing-window gates for
    proposed/rejected events and returns the trimmed PublicEvent so the SFC
    can render a "pending approval" banner
  * POST /tickets/{event_id} rejects when event.status != "approved"
- Frontend: index.vue gains an admin Settings card, Pending Approvals list,
  status badge column and approve/reject row actions, plus an All Users'
  Events admin table; index.js gains the data + methods + an isAdmin probe
  via GET /events/all; display.vue shows pending/rejected banners and
  hides the Buy Ticket form unless status === "approved".

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

models.py

@@ -1,6 +1,5 @@
 from datetime import datetime
 
-from fastapi import Query
 from pydantic import BaseModel, EmailStr, Field, root_validator, validator
 
 
@@ -31,55 +30,64 @@ class EventExtra(BaseModel):
 
 
 class CreateEvent(BaseModel):
-    wallet: str
-    name: str
-    info: str
-    closing_date: str
-    event_start_date: str
-    event_end_date: str
+    wallet: str | None = None  # filled from caller's wallet if absent
+    name: str  # title (required)
+    info: str = ""  # description (optional)
+    closing_date: str | None = None  # defaults to event_end_date
+    event_start_date: str  # required
+    event_end_date: str | None = None  # defaults to event_start_date
     currency: str = "sat"
     allow_fiat: bool = False
     fiat_currency: str = "GBP"
-    amount_tickets: int = Query(..., ge=0)
-    price_per_ticket: float = Query(..., ge=0)
+    amount_tickets: int = 0  # 0 = unlimited / not ticketed
+    price_per_ticket: float = 0  # 0 = free
     banner: str | None = None
     extra: EventExtra = Field(default_factory=EventExtra)
+    status: str = "approved"  # proposed, approved, rejected
 
 
 class Event(BaseModel):
     id: str
     wallet: str
     name: str
-    info: str
-    closing_date: str
+    info: str = ""
+    closing_date: str | None = None
     canceled: bool = False
     event_start_date: str
-    event_end_date: str
-    currency: str
+    event_end_date: str | None = None
+    currency: str = "sat"
     allow_fiat: bool = False
     fiat_currency: str = "GBP"
-    amount_tickets: int
-    price_per_ticket: float
+    amount_tickets: int = 0
+    price_per_ticket: float = 0
     time: datetime
     sold: int = 0
     banner: str | None = None
     extra: EventExtra = Field(default_factory=EventExtra)
+    status: str = "approved"
 
 
 class PublicEvent(BaseModel):
     id: str
     name: str
     info: str
-    closing_date: str
+    closing_date: str | None = None
     canceled: bool
     event_start_date: str
-    event_end_date: str
+    event_end_date: str | None = None
     currency: str
     allow_fiat: bool = False
     fiat_currency: str = "GBP"
     price_per_ticket: float
     banner: str | None
     extra: EventExtra = Field(default_factory=EventExtra)
+    status: str = "approved"  # surfaces "proposed"/"rejected" so SFC can render banner
+
+
+class EventsSettings(BaseModel):
+    """Extension-level settings for the events extension."""
+
+    auto_approve: bool = False  # Skip approval workflow for non-admin users
 
 
 class TicketExtra(BaseModel):