add CrewTabs component with element styling

src/lib/components/crew/CrewTabs.svelte

@@ -0,0 +1,123 @@
+<svelte:options runes={true} />
+
+<script lang="ts">
+	import { page } from '$app/stores'
+
+	type Element = 'wind' | 'fire' | 'water' | 'earth' | 'dark' | 'light'
+
+	interface Props {
+		userElement?: Element | string | undefined
+	}
+
+	const { userElement }: Props = $props()
+
+	interface Tab {
+		href: string
+		label: string
+		match: (pathname: string) => boolean
+	}
+
+	const tabs: Tab[] = [
+		{
+			href: '/crew',
+			label: 'Events',
+			match: (pathname) => pathname === '/crew'
+		},
+		{
+			href: '/crew/members',
+			label: 'Members',
+			match: (pathname) => pathname.startsWith('/crew/members')
+		},
+		{
+			href: '/crew/teams',
+			label: 'Teams',
+			match: (pathname) => pathname.startsWith('/crew/teams')
+		},
+		{
+			href: '/crew/roster',
+			label: 'Roster',
+			match: (pathname) => pathname === '/crew/roster'
+		}
+	]
+
+	const currentTab = $derived(tabs.find((tab) => tab.match($page.url.pathname))?.href ?? '/crew')
+	const elementClass = $derived(userElement ? `element-${userElement}` : '')
+</script>
+
+<nav class="crew-tabs {elementClass}" aria-label="Crew navigation">
+	{#each tabs as tab (tab.href)}
+		<a href={tab.href} class="tab" class:active={currentTab === tab.href}>
+			{tab.label}
+		</a>
+	{/each}
+</nav>
+
+<style lang="scss">
+	@use '$src/themes/spacing' as spacing;
+	@use '$src/themes/layout' as layout;
+	@use '$src/themes/typography' as typography;
+
+	.crew-tabs {
+		display: flex;
+		gap: spacing.$unit-quarter;
+		padding: 0 spacing.$unit-2x spacing.$unit;
+		background: var(--menu-bg);
+		border-bottom: 1px solid rgba(0, 0, 0, 0.08);
+	}
+
+	.tab {
+		flex: 1;
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		padding: spacing.$unit-2x spacing.$unit-2x;
+		border-radius: layout.$card-corner;
+		font-size: typography.$font-small;
+		font-weight: typography.$medium;
+		color: var(--menu-text);
+		text-decoration: none;
+		transition:
+			color 0.15s,
+			background-color 0.15s;
+
+		&:hover {
+			background: var(--menu-bg-item-hover);
+		}
+
+		&.active {
+			font-weight: typography.$bold;
+			background: var(--menu-bg-item-selected, var(--menu-bg-item-hover));
+		}
+	}
+
+	// Element-specific active states
+	nav.element-wind .tab.active {
+		background-color: var(--wind-nav-selected-bg);
+		color: var(--wind-nav-selected-text);
+	}
+
+	nav.element-fire .tab.active {
+		background-color: var(--fire-nav-selected-bg);
+		color: var(--fire-nav-selected-text);
+	}
+
+	nav.element-water .tab.active {
+		background-color: var(--water-nav-selected-bg);
+		color: var(--water-nav-selected-text);
+	}
+
+	nav.element-earth .tab.active {
+		background-color: var(--earth-nav-selected-bg);
+		color: var(--earth-nav-selected-text);
+	}
+
+	nav.element-dark .tab.active {
+		background-color: var(--dark-nav-selected-bg);
+		color: var(--dark-nav-selected-text);
+	}
+
+	nav.element-light .tab.active {
+		background-color: var(--light-nav-selected-bg);
+		color: var(--light-nav-selected-text);
+	}
+</style>