feat(legal): add start consent prompt and log terms metadata on start/bid events

Author: fayerman-source

App.tsx

@@ -125,6 +125,13 @@ const App: React.FC = () => {
 
   const handleStart = async () => {
     const startTime = Date.now();
+    if (isRemote && isHost) {
+      const ok = window.confirm(
+        'By starting, participants acknowledge this is a live auction workflow. Legal enforceability may require separate signed terms.',
+      );
+      if (!ok) return;
+    }
+
     if (isRemote) {
       try {
         await syncService.sendEvent({ type: 'START', startTime, startPrice: config.startPrice });

services/syncService.ts

@@ -243,11 +243,17 @@ class SyncService {
 
     await this.writeRoomState(roomId, nextState);
 
+    const legalMeta =
+      event.type === 'START' || event.type === 'BID'
+        ? { termsVersion: 'v0.1', consentAt: Date.now() }
+        : {};
+
     await supabase.from('auction_events').insert({
       room_id: roomId,
       event_type: event.type,
       payload: {
         ...event,
+        ...legalMeta,
         eventSeq: nextSeq,
         actorUserId: this.currentUserId,
       },