fix: Add API response transformer for legacy CSGOW.TF format

- Create transformers.ts to convert legacy API format to new schema
- Transform score array [a, b] to score_team_a/score_team_b fields
- Convert Unix timestamps to ISO strings
- Map legacy field names (parsed, vac, game_ban) to new names
- Update matches API to use transformer with proper types
- Handle empty map names gracefully in homepage
- Limit featured matches to exactly 6 items

Fixes homepage data display issue where API format mismatch prevented
matches from rendering. API returns legacy CSGO:WTF format while frontend
expects new CS2.WTF schema.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/routes/+page.ts

@@ -14,7 +14,7 @@ export const load: PageLoad = async ({ parent }) => {
 		const matchesData = await api.matches.getMatches({ limit: 6 });
 
 		return {
-			featuredMatches: matchesData.matches,
+			featuredMatches: matchesData.matches.slice(0, 6), // Ensure max 6 matches
 			meta: {
 				title: 'CS2.WTF - Statistics for CS2 Matchmaking',
 				description:
@@ -23,7 +23,10 @@ export const load: PageLoad = async ({ parent }) => {
 		};
 	} catch (error) {
 		// Log error but don't fail the page load
-		console.error('Failed to load featured matches:', error instanceof Error ? error.message : String(error));
+		console.error(
+			'Failed to load featured matches:',
+			error instanceof Error ? error.message : String(error)
+		);
 
 		// Return empty data - page will show without featured matches
 		return {