Add mobile foundation: iOS zoom fix, safe area insets, row padding

- Input base font 16px on mobile to prevent iOS Safari auto-zoom
- Safe area insets for notched phones (top/bottom bars)
- viewport-fit=cover to enable safe area env() values
- Action bar flex-wrap for custom stat field overflow
- Slightly increased row padding on mobile (py-3 sm:py-2)
- Removed redundant font-size classes from Input usages

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/src/components/combatant-row.tsx

@@ -157,7 +157,7 @@ function MaxHpDisplay({
 				inputMode="numeric"
 				value={draft}
 				placeholder="Max"
-				className="h-7 w-[7ch] text-center text-sm tabular-nums"
+				className="h-7 w-[7ch] text-center tabular-nums"
 				onChange={(e) => setDraft(e.target.value)}
 				onBlur={commit}
 				onKeyDown={(e) => {
@@ -272,7 +272,7 @@ function AcDisplay({
 				inputMode="numeric"
 				value={draft}
 				placeholder="AC"
-				className="h-7 w-[6ch] text-center text-sm tabular-nums"
+				className="h-7 w-[6ch] text-center tabular-nums"
 				onChange={(e) => setDraft(e.target.value)}
 				onBlur={commit}
 				onKeyDown={(e) => {
@@ -348,7 +348,7 @@ function InitiativeDisplay({
 				value={draft}
 				placeholder="--"
 				className={cn(
-					"h-7 w-full text-center text-sm tabular-nums",
+					"h-7 w-full text-center tabular-nums",
 					dimmed && "opacity-50",
 				)}
 				onChange={(e) => setDraft(e.target.value)}
@@ -520,7 +520,7 @@ export function CombatantRow({
 				isPulsing && "animate-concentration-pulse",
 			)}
 		>
-			<div className="grid grid-cols-[2rem_3rem_auto_1fr_auto_2rem] items-center gap-1.5 py-2 sm:grid-cols-[2rem_3.5rem_auto_1fr_auto_2rem] sm:gap-3">
+			<div className="grid grid-cols-[2rem_3rem_auto_1fr_auto_2rem] items-center gap-1.5 py-3 sm:grid-cols-[2rem_3.5rem_auto_1fr_auto_2rem] sm:gap-3 sm:py-2">
 				{/* Concentration */}
 				<button
 					type="button"