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/lib/server/webhooks.ts

@@ -0,0 +1,29 @@
+import { prisma } from './db.js';
+import crypto from 'crypto';
+
+export async function dispatchWebhooks(tenantId: string, event: string, data: any) {
+	// Don't await this - fire and forget
+	doDispatch(tenantId, event, data).catch(() => {});
+}
+
+async function doDispatch(tenantId: string, event: string, data: any) {
+	const webhooks = await prisma.webhook.findMany({
+		where: { tenantId, active: true, events: { has: event } }
+	});
+
+	const payload = JSON.stringify({ event, data, timestamp: new Date().toISOString() });
+
+	for (const webhook of webhooks) {
+		const signature = crypto.createHmac('sha256', webhook.secret).update(payload).digest('hex');
+
+		fetch(webhook.url, {
+			method: 'POST',
+			headers: {
+				'Content-Type': 'application/json',
+				'X-Pounce-Signature': signature,
+				'X-Pounce-Event': event
+			},
+			body: payload
+		}).catch(() => {});
+	}
+}