feat: Implement Phase 5 match detail tabs with charts and data visualization

This commit implements significant portions of Phase 5 (Feature Delivery) including:

Chart Components (src/lib/components/charts/):
- LineChart.svelte: Line charts with Chart.js integration
- BarChart.svelte: Vertical/horizontal bar charts with stacking
- PieChart.svelte: Pie/Doughnut charts with legend
- All charts use Svelte 5 runes ($effect) for reactivity
- Responsive design with customizable options

Data Display Components (src/lib/components/data-display/):
- DataTable.svelte: Generic sortable, filterable table component
- TypeScript generics support for type safety
- Custom formatters and renderers
- Sort indicators and column alignment options

Match Detail Pages:
- Match layout with header, tabs, and score display
- Economy tab: Equipment value charts, buy type classification, round-by-round table
- Details tab: Multi-kill distribution charts, team performance, top performers
- Chat tab: Chronological messages with filtering, search, and round grouping

Additional Components:
- SearchBar, ThemeToggle (layout components)
- MatchCard, PlayerCard (domain components)
- Modal, Skeleton, Tabs, Tooltip (UI components)
- Player profile page with stats and recent matches

Dependencies:
- Installed chart.js for data visualization
- Created Svelte 5 compatible chart wrappers

Phase 4 marked as complete, Phase 5 at 50% completion.
Flashes and Damage tabs deferred for future implementation.

Note: Minor linting warnings to be addressed in follow-up commit.

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

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

src/lib/components/layout/Header.svelte

@@ -1,5 +1,7 @@
 <script lang="ts">
-	import { Search, Menu, X } from 'lucide-svelte';
+	import { Menu, X } from 'lucide-svelte';
+	import SearchBar from './SearchBar.svelte';
+	import ThemeToggle from './ThemeToggle.svelte';
 
 	let mobileMenuOpen = $state(false);
 
@@ -35,14 +37,9 @@
 			</nav>
 
 			<!-- Search & Actions -->
-			<div class="flex items-center gap-3">
-				<button
-					class="btn btn-ghost btn-sm hidden md:inline-flex"
-					aria-label="Search"
-					title="Search (Cmd+K)"
-				>
-					<Search class="h-5 w-5" />
-				</button>
+			<div class="flex items-center gap-2">
+				<SearchBar />
+				<ThemeToggle />
 
 				<!-- Mobile Menu Toggle -->
 				<button