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>

server.js

@@ -3,6 +3,7 @@ import { createServer } from 'http';
 import { Server } from 'socket.io';
 import { PrismaClient } from '@prisma/client';
 import pino from 'pino';
+import cron from 'node-cron';
 import { handler } from './build/handler.js';
 
 const logger = pino({ name: 'pounce' });
@@ -148,6 +149,58 @@ io.on('connection', (socket) => {
 // Store io globally so SvelteKit API routes can broadcast via realtime.ts
 globalThis.__socketIO = io;
 
+// ─── Due Date Reminder Cron (daily at 8:00 UTC) ────────────
+cron.schedule('0 8 * * *', async () => {
+	try {
+		const now = new Date();
+		const in24h = new Date(now.getTime() + 24 * 60 * 60 * 1000);
+
+		const cards = await prisma.card.findMany({
+			where: {
+				archived: false,
+				dueReminderSent: false,
+				dueDate: { gte: now, lte: in24h }
+			},
+			include: {
+				assignees: { select: { userId: true } },
+				column: { select: { board: { select: { id: true, title: true } } } }
+			}
+		});
+
+		for (const card of cards) {
+			const boardId = card.column.board.id;
+			const boardTitle = card.column.board.title;
+
+			for (const assignee of card.assignees) {
+				await prisma.notification.create({
+					data: {
+						userId: assignee.userId,
+						type: 'due_soon',
+						title: `"${card.title}" is due soon`,
+						body: `Card in ${boardTitle} is due within 24 hours`,
+						link: `/boards/${boardId}?card=${card.id}`
+					}
+				});
+				io.to('user:' + assignee.userId).emit('notification:new', {
+					type: 'due_soon',
+					title: `"${card.title}" is due soon`
+				});
+			}
+
+			await prisma.card.update({
+				where: { id: card.id },
+				data: { dueReminderSent: true }
+			});
+		}
+
+		if (cards.length > 0) {
+			logger.info({ count: cards.length }, 'Due date reminders sent');
+		}
+	} catch (err) {
+		logger.error({ err }, 'Due date reminder cron failed');
+	}
+});
+
 // SvelteKit handler
 app.use(handler);