Branded Voice copy pass, members activity panels, menu update

Site copy regenerated through the bv-tester1 engine; em dashes scrubbed from
all user-visible strings. /api/my/activity serves per-member earnings,
referrals, and purchases from the chain index.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

server.js

@@ -30,7 +30,7 @@ function siteConfig() {
   try { saved = JSON.parse(fs.readFileSync(SITE_FILE, 'utf8')); } catch (e) {}
   return Object.assign({
     siteName: 'InstantAdPay',
-    tagline: 'Advertising that pays the people who build it — instantly, on-chain.',
+    tagline: 'Advertise and earn. Locked in code, not promises.',
     rehearsal: true // shows the testnet banner; flipped off at mainnet launch
   }, saved);
 }
@@ -172,6 +172,20 @@ const server = http.createServer(async (req, res) => {
       return json(res, 200, out);
     }
 
+    if (p === '/api/my/activity' && req.method === 'GET') {
+      const s = auth.fromRequest(req);
+      if (!s) return json(res, 401, { error: 'Sign in first.' });
+      const id = s.memberId || await auth.refreshMemberId(s);
+      if (!id) return json(res, 200, { memberId: 0, earnings: [], purchases: [], referrals: [] });
+      const evs = chain.recentEvents(600);
+      return json(res, 200, {
+        memberId: id,
+        earnings: evs.filter(e => (e.type === 'TierPaid' && e.recipientId === id) || (e.type === 'AwardPaid' && e.toId === id)),
+        purchases: evs.filter(e => e.type === 'Purchase' && e.buyerId === id),
+        referrals: evs.filter(e => (e.type === 'MemberActivated' && e.sponsorId === id) || (e.type === 'BuyerCounted' && e.sponsorId === id))
+      });
+    }
+
     // -- admin (Bearer ADMIN_PASSWORD)
     if (p === '/api/admin/site' && req.method === 'PATCH') {
       if (!isAdmin(req)) return json(res, 401, { error: 'auth' });