add: color selection on dashboard

src/lib/components/dashboard/LocalWishlistsSection.svelte

@@ -7,9 +7,13 @@
 	import { onMount } from 'svelte';
 
 	let {
-		isAuthenticated = false
+		isAuthenticated = false,
+		fallbackColor = null,
+		fallbackTheme = null
 	}: {
 		isAuthenticated?: boolean;
+		fallbackColor?: string | null;
+		fallbackTheme?: string | null;
 	} = $props();
 
 	const t = $derived(languageStore.t);
@@ -114,6 +118,8 @@
 	emptyActionLabel={t.dashboard.createLocalWishlist || "Create local wishlist"}
 	emptyActionHref="/"
 	showCreateButton={true}
+	fallbackColor={fallbackColor}
+	fallbackTheme={fallbackTheme}
 >
 		{#snippet actions(wishlist, unlocked)}
 			<div class="flex gap-2 flex-wrap">

src/lib/components/dashboard/WishlistCard.svelte

@@ -11,6 +11,8 @@
 		itemCount,
 		color = null,
 		theme = null,
+		fallbackColor = null,
+		fallbackTheme = null,
 		children
 	}: {
 		title: string;
@@ -18,14 +20,18 @@
 		itemCount: number;
 		color?: string | null;
 		theme?: string | null;
+		fallbackColor?: string | null;
+		fallbackTheme?: string | null;
 		children?: Snippet;
 	} = $props();
 
-	const cardStyle = $derived(getCardStyle(color));
+	const finalColor = $derived(color || fallbackColor);
+	const finalTheme = $derived(theme || fallbackTheme);
+	const cardStyle = $derived(getCardStyle(color, fallbackColor));
 </script>
 
 <Card style={cardStyle} class="h-full flex flex-col relative overflow-hidden">
-	<ThemeCard themeName={theme} color={color} />
+	<ThemeCard themeName={finalTheme} color={finalColor} />
 	<CardHeader class="flex-shrink-0 relative z-10">
 		<div class="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-1 sm:gap-2">
 			<CardTitle class="text-lg flex items-center gap-2 flex-1 min-w-0">

src/lib/components/dashboard/WishlistGrid.svelte

@@ -4,6 +4,8 @@
 	import EmptyState from '$lib/components/layout/EmptyState.svelte';
 	import type { Snippet } from 'svelte';
 	import { flip } from 'svelte/animate';
+	import { getCardStyle } from '$lib/utils/colors';
+	import ThemeCard from '$lib/components/themes/ThemeCard.svelte';
 
 	let {
 		title,
@@ -13,6 +15,8 @@
 		emptyDescription,
 		emptyActionLabel,
 		emptyActionHref,
+		fallbackColor = null,
+		fallbackTheme = null,
 		headerAction,
 		searchBar,
 		children
@@ -24,11 +28,15 @@
 		emptyDescription?: string;
 		emptyActionLabel?: string;
 		emptyActionHref?: string;
+		fallbackColor?: string | null;
+		fallbackTheme?: string | null;
 		headerAction?: Snippet;
 		searchBar?: Snippet;
 		children: Snippet<[any]>;
 	} = $props();
 
+	const cardStyle = $derived(getCardStyle(fallbackColor, null));
+
 	let scrollContainer: HTMLElement | null = null;
 
 	function handleWheel(event: WheelEvent) {
@@ -44,8 +52,9 @@
 	}
 </script>
 
-<Card>
-	<CardHeader>
+<Card style={cardStyle} class="relative overflow-hidden">
+	<ThemeCard themeName={fallbackTheme} color={fallbackColor} />
+	<CardHeader class="relative z-10">
 		<div class="flex flex-col gap-4 sm:flex-row sm:items-center sm:justify-between">
 			<div class="flex-1 min-w-0">
 				<CardTitle>{title}</CardTitle>
@@ -63,7 +72,7 @@
 			</div>
 		{/if}
 	</CardHeader>
-	<CardContent>
+	<CardContent class="relative z-10">
 		{#if items && items.length > 0}
 			<div
 				bind:this={scrollContainer}

src/lib/components/dashboard/WishlistSection.svelte

@@ -21,6 +21,8 @@
 		emptyActionHref,
 		showCreateButton = false,
 		hideIfEmpty = false,
+		fallbackColor = null,
+		fallbackTheme = null,
 		actions
 	}: {
 		title: string;
@@ -32,6 +34,8 @@
 		emptyActionHref?: string;
 		showCreateButton?: boolean;
 		hideIfEmpty?: boolean;
+		fallbackColor?: string | null;
+		fallbackTheme?: string | null;
 		actions: Snippet<[WishlistItem, boolean]>; // item, unlocked
 	} = $props();
 
@@ -126,6 +130,8 @@
 		{emptyDescription}
 		{emptyActionLabel}
 		{emptyActionHref}
+		{fallbackColor}
+		{fallbackTheme}
 	>
 		{#snippet headerAction()}
 			<div class="flex flex-col sm:flex-row gap-2">
@@ -150,6 +156,8 @@
 				itemCount={wishlist.items?.length || 0}
 				color={wishlist.color}
 				theme={wishlist.theme}
+				fallbackColor={fallbackColor}
+				fallbackTheme={fallbackTheme}
 			>
 				{@render actions(item, unlocked)}
 			</WishlistCard>

src/lib/components/layout/DashboardHeader.svelte

@@ -3,6 +3,7 @@
 	import { ThemeToggle } from '$lib/components/ui/theme-toggle';
 	import { LanguageToggle } from '$lib/components/ui/language-toggle';
 	import ThemePicker from '$lib/components/ui/theme-picker.svelte';
+	import ColorPicker from '$lib/components/ui/ColorPicker.svelte';
 	import { signOut } from '@auth/sveltekit/client';
 	import { languageStore } from '$lib/stores/language.svelte';
 	import { enhance } from '$app/forms';
@@ -11,25 +12,27 @@
 		userName,
 		userEmail,
 		dashboardTheme = 'none',
+		dashboardColor = null,
 		isAuthenticated = false,
-		onThemeUpdate
+		onThemeUpdate,
+		onColorUpdate
 	}: {
 		userName?: string | null;
 		userEmail?: string | null;
 		dashboardTheme?: string;
+		dashboardColor?: string | null;
 		isAuthenticated?: boolean;
 		onThemeUpdate?: (theme: string | null) => void;
+		onColorUpdate?: (color: string | null) => void;
 	} = $props();
 
 	const t = $derived(languageStore.t);
 
 	async function handleThemeChange(theme: string) {
-		// Update theme immediately for instant visual feedback
 		if (onThemeUpdate) {
 			onThemeUpdate(theme);
 		}
 
-		// Only submit to database for authenticated users
 		if (isAuthenticated) {
 			const formData = new FormData();
 			formData.append('theme', theme);
@@ -40,6 +43,30 @@
 			});
 		}
 	}
+
+	let localColor = $state(dashboardColor);
+
+	$effect(() => {
+		localColor = dashboardColor;
+	});
+
+	async function handleColorChange() {
+		if (onColorUpdate) {
+			onColorUpdate(localColor);
+		}
+
+		if (isAuthenticated) {
+			const formData = new FormData();
+			if (localColor) {
+				formData.append('color', localColor);
+			}
+
+			await fetch('?/updateDashboardColor', {
+				method: 'POST',
+				body: formData
+			});
+		}
+	}
 </script>
 
 <div class="flex flex-col gap-4 sm:flex-row sm:items-center sm:justify-between">
@@ -52,6 +79,7 @@
 		{/if}
 	</div>
 	<div class="flex items-center gap-1 sm:gap-2 flex-shrink-0">
+		<ColorPicker bind:color={localColor} onchange={handleColorChange} />
 		<ThemePicker value={dashboardTheme} onValueChange={handleThemeChange} />
 		<LanguageToggle />
 		<ThemeToggle />

src/lib/components/themes/ThemeCard.svelte

@@ -7,8 +7,8 @@
 		themeName,
 		color
 	}: {
-		themeName?: string;
-		color?: string;
+		themeName?: string | null;
+		color?: string | null;
 	} = $props();
 
 	const theme = $derived(getTheme(themeName));