Session 37: Design system Phase F — mobile parity: 5-tab bar, More sheet, PWA polish (1872 tests)

VYNDR 2.0 conversion, Phase F (mobile is the PWA we launch first). Frontend-only;
zero backend changes.

- BottomTabBar rewritten to the §6 5-tab spec: Slate/Terminal/Scan/Ledger/More,
  with Scan as the prominent raised grade-green action. Shown for anon too (only
  mobile nav). Integrated More bottom sheet (sheet-up, backdrop dismiss, 48px mono
  rows). iOS safe-area + 44px touch targets.
- Nav hamburger retired on mobile (tab bar owns nav).
- globals.css mobile section: tab-bar hidden >=768, main bottom padding,
  grade-hero 80px, terminal-grid stacks, game-lines horizontal scroll.
- PWA: manifest shortcuts (Slate/Scan/Terminal) + categories; viewport-fit=cover.

Gotcha: `as const` on the TABS array broke type-check (distinct literal types);
fixed with a shared TabDef interface.

19 new tests. Backend 1853 -> 1872, 145 suites, zero regressions. Web build clean.

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

web/public/manifest.json

@@ -8,7 +8,12 @@
   "background_color": "#06060B",
   "theme_color": "#06060B",
   "orientation": "portrait-primary",
-  "categories": ["sports", "finance", "entertainment"],
+  "categories": ["sports", "finance", "productivity"],
+  "shortcuts": [
+    { "name": "The Slate", "short_name": "Slate", "url": "/dashboard", "description": "Tonight's games and graded props" },
+    { "name": "Scan a prop", "short_name": "Scan", "url": "/scan", "description": "Grade any player prop" },
+    { "name": "The Terminal", "short_name": "Terminal", "url": "/terminal", "description": "League intelligence hub" }
+  ],
   "icons": [
     { "src": "/favicon.svg", "sizes": "any", "type": "image/svg+xml" },
     { "src": "/icons/icon-192.png", "sizes": "192x192", "type": "image/png", "purpose": "any" },