feat(web): add Header and ReportPicker components

Header shows active report name (left) with dropdown chevron and gear
icon linking to /settings (right). ReportPicker uses native Popover API
with 11 reports grouped into Common, Time-based, Recurring, and Archive.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

opal-web/src/lib/components/Header.svelte

@@ -0,0 +1,125 @@
+<script>
+	import ReportPicker from './ReportPicker.svelte';
+
+	/**
+	 * @type {string}
+	 */
+	export let activeReport;
+
+	/**
+	 * @type {(reportName: string) => void}
+	 */
+	export let onReportChange;
+
+	/** @type {HTMLButtonElement|null} */
+	let anchorEl = null;
+
+	/** @type {ReportPicker} */
+	let picker;
+
+	/** Map backend report names to display labels */
+	const reportLabels = /** @type {Record<string, string>} */ ({
+		list: 'Pending',
+		next: 'Next',
+		active: 'Active',
+		ready: 'Ready',
+		overdue: 'Overdue',
+		waiting: 'Waiting',
+		newest: 'Newest',
+		oldest: 'Oldest',
+		recurring: 'Recurring',
+		template: 'Template',
+		completed: 'Completed'
+	});
+
+	$: displayLabel = reportLabels[activeReport] || activeReport;
+</script>
+
+<header class="header">
+	<button
+		class="report-btn"
+		bind:this={anchorEl}
+		on:click={() => picker.toggle()}
+	>
+		<span class="report-label">{displayLabel}</span>
+		<svg class="chevron" viewBox="0 0 24 24" fill="none" stroke="currentColor">
+			<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7" />
+		</svg>
+	</button>
+
+	<a href="/settings" class="settings-btn" aria-label="Settings">
+		<svg class="icon" viewBox="0 0 24 24" fill="none" stroke="currentColor">
+			<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z" />
+			<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
+		</svg>
+	</a>
+</header>
+
+<ReportPicker
+	bind:this={picker}
+	{activeReport}
+	onSelect={onReportChange}
+	anchorEl={anchorEl}
+/>
+
+<style>
+	.header {
+		display: flex;
+		align-items: center;
+		justify-content: space-between;
+		padding: var(--spacing-sm) var(--spacing-md);
+		background-color: var(--bg-primary);
+		border-bottom: 1px solid var(--border-color);
+		flex-shrink: 0;
+	}
+
+	.report-btn {
+		display: inline-flex;
+		align-items: center;
+		gap: var(--spacing-xs);
+		background: none;
+		border: none;
+		padding: var(--spacing-xs) var(--spacing-sm);
+		border-radius: var(--border-radius);
+		cursor: pointer;
+		font-family: inherit;
+		min-width: unset;
+	}
+
+	.report-btn:hover {
+		background-color: var(--bg-secondary);
+	}
+
+	.report-label {
+		font-size: var(--font-size-lg);
+		font-weight: 600;
+		color: var(--text-primary);
+	}
+
+	.chevron {
+		width: 1rem;
+		height: 1rem;
+		color: var(--text-secondary);
+	}
+
+	.settings-btn {
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		width: 44px;
+		height: 44px;
+		border-radius: var(--border-radius);
+		color: var(--text-secondary);
+		transition: background-color 0.2s;
+	}
+
+	.settings-btn:hover {
+		background-color: var(--bg-secondary);
+		text-decoration: none;
+	}
+
+	.icon {
+		width: 1.25rem;
+		height: 1.25rem;
+	}
+</style>

opal-web/src/lib/components/ReportPicker.svelte

@@ -0,0 +1,145 @@
+<script>
+	/**
+	 * @type {string}
+	 */
+	export let activeReport;
+
+	/**
+	 * @type {(reportName: string) => void}
+	 */
+	export let onSelect;
+
+	/**
+	 * @type {HTMLElement}
+	 */
+	export let anchorEl;
+
+	/** @type {HTMLElement|null} */
+	let popoverEl = null;
+
+	const groups = [
+		{
+			label: 'Common',
+			reports: [
+				{ label: 'Pending', value: 'list' },
+				{ label: 'Next', value: 'next' },
+				{ label: 'Active', value: 'active' },
+				{ label: 'Ready', value: 'ready' }
+			]
+		},
+		{
+			label: 'Time-based',
+			reports: [
+				{ label: 'Overdue', value: 'overdue' },
+				{ label: 'Waiting', value: 'waiting' },
+				{ label: 'Newest', value: 'newest' },
+				{ label: 'Oldest', value: 'oldest' }
+			]
+		},
+		{
+			label: 'Recurring',
+			reports: [
+				{ label: 'Recurring', value: 'recurring' },
+				{ label: 'Template', value: 'template' }
+			]
+		},
+		{
+			label: 'Archive',
+			reports: [
+				{ label: 'Completed', value: 'completed' }
+			]
+		}
+	];
+
+	export function toggle() {
+		if (popoverEl) {
+			popoverEl.togglePopover();
+		}
+	}
+
+	/**
+	 * @param {string} value
+	 */
+	function select(value) {
+		onSelect(value);
+		if (popoverEl) {
+			popoverEl.hidePopover();
+		}
+	}
+</script>
+
+<div class="report-picker" popover bind:this={popoverEl}>
+	{#each groups as group}
+		<div class="group">
+			<div class="group-label">{group.label}</div>
+			{#each group.reports as report}
+				<button
+					class="report-option"
+					class:active={activeReport === report.value}
+					on:click={() => select(report.value)}
+				>
+					{report.label}
+				</button>
+			{/each}
+		</div>
+	{/each}
+</div>
+
+<style>
+	.report-picker {
+		position: fixed;
+		top: 48px;
+		left: var(--spacing-md);
+		right: auto;
+		margin: 0;
+		padding: var(--spacing-sm);
+		background-color: var(--bg-primary);
+		border: 1px solid var(--border-color);
+		border-radius: var(--border-radius);
+		box-shadow: var(--shadow-lg);
+		min-width: 180px;
+		max-width: 240px;
+	}
+
+	.group {
+		padding: var(--spacing-xs) 0;
+	}
+
+	.group + .group {
+		border-top: 1px solid var(--border-color);
+	}
+
+	.group-label {
+		font-size: var(--font-size-xs);
+		font-weight: 600;
+		color: var(--text-tertiary);
+		text-transform: uppercase;
+		letter-spacing: 0.05em;
+		padding: var(--spacing-xs) var(--spacing-sm);
+	}
+
+	.report-option {
+		display: block;
+		width: 100%;
+		padding: var(--spacing-sm) var(--spacing-sm);
+		background: none;
+		border: none;
+		border-radius: 0.25rem;
+		font-size: var(--font-size-sm);
+		font-family: inherit;
+		color: var(--text-primary);
+		text-align: left;
+		cursor: pointer;
+		min-height: 36px;
+		min-width: unset;
+	}
+
+	.report-option:hover {
+		background-color: var(--bg-secondary);
+	}
+
+	.report-option.active {
+		background-color: var(--color-primary);
+		color: white;
+	}
+</style>