feat: CS2 format support, player tracking fixes, and homepage enhancements

- Add dynamic MR12/MR15 halftime calculation to RoundTimeline component
- Fix TrackPlayerModal API signature (remove shareCode, change isOpen to open binding)
- Update Player types for string IDs and add ban fields (vac_count, vac_date, game_ban_count, game_ban_date)
- Add target/rel props to Button component for external links
- Enhance homepage with processing matches indicator
- Update preferences store for string player IDs
- Document Phase 5 progress and TypeScript fixes in TODO.md

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

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

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

@@ -55,15 +55,13 @@
 	const sortedPlayerWeapons = playerWeaponsData.sort((a, b) => b.total_kills - a.total_kills);
 
 	// Prepare data table columns
+	type PlayerWeapon = (typeof sortedPlayerWeapons)[0];
 	const weaponColumns = [
 		{
 			key: 'player_name' as const,
 			label: 'Player',
 			sortable: true,
-			render: (
-				value: string | number | boolean | undefined,
-				row: (typeof sortedPlayerWeapons)[0]
-			) => {
+			render: (value: unknown, row: PlayerWeapon) => {
 				const strValue = value !== undefined ? String(value) : '';
 				const teamClass = row.team_id === firstTeamId ? 'text-terrorist' : 'text-ct';
 				return `<a href="/player/${row.player_id}" class="font-medium hover:underline ${teamClass}">${strValue}</a>`;
@@ -89,8 +87,7 @@
 			sortable: true,
 			align: 'center' as const,
 			class: 'font-mono',
-			format: (v: string | number | undefined) =>
-				v !== undefined ? (v as number).toLocaleString() : '0'
+			format: (v: unknown) => (v !== undefined ? (v as number).toLocaleString() : '0')
 		},
 		{
 			key: 'total_hits' as const,