Initial implementation: multi-tenant Kanban board (Phase 1)

Complete Phase 1 foundation with working board, column, and card CRUD:
- SvelteKit + TypeScript + Tailwind CSS v4 + adapter-node
- Full Prisma schema with 18 tables (tenants, users, boards, columns, cards, etc.)
- Multi-tenant architecture with hostname-based tenant resolution
- Email/password auth with bcrypt + session cookies
- Board/Column/Card API routes with full CRUD
- Fractional indexing for drag-and-drop ordering
- Board view with svelte-dnd-action for column and card drag-and-drop
- Card modal with inline editing
- Auth pages (login, register)
- Board listing with create form
- RLS policies SQL script for tenant isolation
- Prisma RLS client extensions (forTenant/bypassRLS)
- Permission helpers (canEditBoard, canManageMembers, etc.)
- Socket.IO server setup (dev Vite plugin + production Express server)
- Client-side socket store for real-time updates
- Docker Compose (app + PostgreSQL 16) + multi-stage Dockerfile
- Database seed script (default tenant + admin user)

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

src/routes/boards/+page.server.ts

@@ -0,0 +1,31 @@
+import type { PageServerLoad } from './$types.js';
+import { prisma } from '$lib/server/db.js';
+
+export const load: PageServerLoad = async ({ locals }) => {
+	const tenant = locals.tenant;
+	if (!tenant) return { boards: [] };
+
+	const where: any = { tenantId: tenant.id, archived: false };
+
+	if (!locals.user) {
+		where.visibility = 'PUBLIC';
+	} else {
+		where.OR = [
+			{ visibility: 'PUBLIC' },
+			{ members: { some: { userId: locals.user.id } } }
+		];
+	}
+
+	const boards = await prisma.board.findMany({
+		where,
+		include: {
+			members: {
+				include: { user: { select: { id: true, name: true, avatarUrl: true } } }
+			},
+			_count: { select: { columns: true } }
+		},
+		orderBy: { updatedAt: 'desc' }
+	});
+
+	return { boards };
+};