Increase encounter method badge sizes for readability

Bump xs from 8px to 10px and sm from 9px to 12px so the route-list
badges (Grass, Surfing, Gift, etc.) are legible at a glance.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/components/EncounterMethodBadge.tsx

@@ -90,7 +90,7 @@ export function EncounterMethodBadge({
 }) {
   const config = METHOD_CONFIG[method]
   if (!config) return null
-  const sizeClass = size === 'xs' ? 'text-[8px] px-1 py-0' : 'text-[9px] px-1.5 py-0.5'
+  const sizeClass = size === 'xs' ? 'text-[10px] px-1.5 py-0.5' : 'text-xs px-2 py-0.5'
   return (
     <span className={`${sizeClass} font-medium rounded-full whitespace-nowrap ${config.color}`}>
       {config.label}