fix: Fix match detail data loading and add API transformation layer

- Update Zod schemas to match raw API response formats
- Create transformation layer (rounds, weapons, chat) to convert raw API to structured format
- Add player name mapping in transformers for better UX
- Fix Svelte 5 reactivity issues in chat page (replace $effect with $derived)
- Fix Chart.js compatibility with Svelte 5 state proxies using JSON serialization
- Add economy advantage chart with halftime perspective flip (WIP)
- Remove stray comment from details page
- Update layout to load match data first, then pass to API methods

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

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

src/routes/match/[id]/details/+page.svelte

@@ -350,7 +350,6 @@
 		</Card>
 
 		<!-- Top Performers -->
-		// Top Performers
 		<div class="grid gap-6 md:grid-cols-3">
 			{#if sortedPlayers.length > 0 && sortedPlayers[0]}
 				<!-- Most Kills -->