Session 49: Complete onboarding flow + name micro-fixes (2185 tests)

Name micro-fixes (close the normalization arc):
- collapseInitials merges "J C Escarra" -> "JC Escarra" (display + key); both
  playerName.js copies. Added mickey:michael nickname.

Onboarding flow (end-to-end, complete):
- Storage: Supabase user_metadata.preferences (no migration).
- API: src/routes/preferences.js GET/POST (requireAuth, admin getUserById/
  updateUserById, partial merge + sanitize) + Next /api/preferences proxy.
- Page: web onboarding/page.tsx — 3 steps (sports >=1 / books skip / bankroll
  presets+custom+skip) -> SIGNAL ACTIVE -> POST onboarding_complete:true -> 2s
  -> /dashboard. Redirects to login when unauthenticated.
- Redirect: dashboard fetches /api/preferences fresh; new+incomplete users
  (created_at >= cutoff) -> /onboarding; never while auth loading; existing
  users exempt.
- Personalization: Slate default tab = prefs.sports[0]; preferred books glow in
  the card lines grid (lib/books isPreferredBook, threaded dash->Slate->GameCard).
- Settings: PREFERENCES section loads + edits + saves sports/books/limit.

Backend 2156 -> 2185 tests (+29), 184 suites. Web build clean (exit 0).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

web/src/lib/playerName.js

@@ -17,15 +17,20 @@ const NICKNAMES = {
   charlie: 'charles', chuck: 'charles', rick: 'richard', dick: 'richard',
   jim: 'james', jimmy: 'james', ray: 'raymond', fred: 'frederick',
   kenny: 'kenneth', sam: 'samuel', pat: 'patrick', greg: 'gregory',
-  steve: 'steven', tim: 'timothy', frank: 'francis',
+  steve: 'steven', tim: 'timothy', frank: 'francis', mickey: 'michael',
 };
 
+// Collapse adjacent single-letter words: "J C Escarra" → "JC Escarra".
+function collapseInitials(s) {
+  return s.replace(/\b([A-Za-z])(?: ([A-Za-z]))+\b(?=\s|$)/g, (m) => m.replace(/ /g, ''));
+}
+
 function normalizeName(raw) {
-  const display = String(raw == null ? '' : raw)
+  const display = collapseInitials(String(raw == null ? '' : raw)
     .replace(/\s*\([^)]*\)\s*/g, ' ')
     .replace(/\./g, '')
     .replace(/\s+/g, ' ')
-    .trim();
+    .trim());
   const folded = display.normalize('NFD').replace(/[̀-ͯ]/g, '').toLowerCase();
   const key = folded.split(' ').filter((t) => t && !SUFFIXES.has(t)).join(' ');
   return { display, key };