Add condition badges for boss Pokemon mechanics

Show colored pill badges (Mega, G-Max, D-Max, Tera) on boss Pokemon
in BossDefeatModal and BossTeamPreview. Starter-dependent condition
labels are ignored. Follows EncounterMethodBadge pattern.

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

frontend/src/components/ConditionBadge.tsx

@@ -0,0 +1,36 @@
+const CONDITION_CONFIG: Record<string, { label: string; color: string }> = {
+  'Mega Evolution': {
+    label: 'Mega',
+    color: 'bg-fuchsia-100 text-fuchsia-800 dark:bg-fuchsia-900/40 dark:text-fuchsia-300',
+  },
+  Gigantamax: {
+    label: 'G-Max',
+    color: 'bg-red-100 text-red-800 dark:bg-red-900/40 dark:text-red-300',
+  },
+  Dynamax: {
+    label: 'D-Max',
+    color: 'bg-rose-100 text-rose-800 dark:bg-rose-900/40 dark:text-rose-300',
+  },
+  Terastallize: {
+    label: 'Tera',
+    color: 'bg-teal-100 text-teal-800 dark:bg-teal-900/40 dark:text-teal-300',
+  },
+}
+
+export function ConditionBadge({
+  condition,
+  size = 'sm',
+}: {
+  condition: string | null
+  size?: 'sm' | 'xs'
+}) {
+  if (!condition) return null
+  const config = CONDITION_CONFIG[condition]
+  if (!config) return null
+  const sizeClass = size === 'xs' ? 'text-[8px] px-1 py-0' : 'text-[9px] px-1.5 py-0.5'
+  return (
+    <span className={`${sizeClass} font-medium rounded-full whitespace-nowrap ${config.color}`}>
+      {config.label}
+    </span>
+  )
+}