Add 17 features: My Work view, card copy/numbering, calendar, bulk ops, custom fields, automations, webhooks, invites, import/export, and more

Features implemented across 6 batches:
- Batch A: Fix ColorPicker gradient sync, tenant custom logo, unarchive cards, board backgrounds
- Batch B: My Work view, card copy/duplicate, card numbering (BOARD-123)
- Batch C: Due date reminders (cron), card watching with notifications
- Batch D: Bulk card operations, column sorting, calendar view
- Batch E: Invite by link, board import/export (Pounce + Trello JSON)
- Batch F: Webhooks with HMAC signing, custom fields, automation rules engine

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

src/routes/boards/[boardId]/calendar/+page.svelte

@@ -0,0 +1,49 @@
+<script lang="ts">
+	import CalendarGrid from '$lib/components/CalendarGrid.svelte';
+
+	let { data } = $props();
+</script>
+
+<svelte:head>
+	<title>{data.board.title} - Calendar</title>
+</svelte:head>
+
+<div class="flex flex-col h-[calc(100vh-3.5rem)]">
+	<!-- Header -->
+	<div class="flex items-center gap-3 px-4 py-3 bg-white/80 border-b border-gray-200 dark:bg-gray-900/80 dark:border-gray-700 flex-wrap">
+		<a href="/boards/{data.board.id}" class="text-gray-400 hover:text-gray-600 dark:text-gray-500 dark:hover:text-gray-300 transition" aria-label="Back to board">
+			<svg class="w-5 h-5" viewBox="0 0 20 20" fill="currentColor">
+				<path fill-rule="evenodd" d="M17 10a.75.75 0 01-.75.75H5.612l4.158 3.96a.75.75 0 11-1.04 1.08l-5.5-5.25a.75.75 0 010-1.08l5.5-5.25a.75.75 0 111.04 1.08L5.612 9.25H16.25A.75.75 0 0117 10z" clip-rule="evenodd" />
+			</svg>
+		</a>
+		<h1 class="text-lg font-bold text-gray-900 dark:text-gray-100">{data.board.title}</h1>
+
+		<div class="flex gap-1 bg-gray-100 dark:bg-gray-800 rounded-lg p-0.5">
+			<a
+				href="/boards/{data.board.id}"
+				class="px-3 py-1 text-sm rounded-md text-gray-500 dark:text-gray-400 hover:text-gray-700 dark:hover:text-gray-300"
+			>
+				Board
+			</a>
+			<span class="px-3 py-1 text-sm rounded-md bg-white dark:bg-gray-700 shadow-sm font-medium text-gray-900 dark:text-gray-100">
+				Calendar
+			</span>
+		</div>
+	</div>
+
+	<!-- Calendar -->
+	<div class="flex-1 overflow-y-auto p-4">
+		{#if data.cards.length === 0}
+			<div class="text-center py-12">
+				<p class="text-gray-400 dark:text-gray-500">No cards with due dates.</p>
+				<a href="/boards/{data.board.id}" class="text-sm text-[var(--color-primary)] hover:underline mt-2 inline-block">Back to board</a>
+			</div>
+		{:else}
+			<CalendarGrid
+				cards={data.cards}
+				boardId={data.board.id}
+				cardPrefix={data.board.cardPrefix}
+			/>
+		{/if}
+	</div>
+</div>