Fase 0: scaffold monorepo, SvelteKit skeleton, and dev infrastructure

- Turborepo + pnpm workspaces with apps/web and packages/types
- SvelteKit app: Tailwind, Paraglide i18n (en/es), keycloak-js, Supabase client,
  auth/collective stores, PWA service worker skeleton, all route placeholders
- packages/types: domain types (User, Collective, ShoppingList, etc.) and
  database.ts placeholder for generated types
- Justfile with dev, db-*, kc-*, build, backup, restore, deploy recipes
- infra/docker-compose.dev.yml: Postgres 15, GoTrue, PostgREST, Realtime v2.83,
  Storage, Kong (port 8001), Studio, Keycloak 24
- infra/docker-compose.prod.yml, kong.yml, db-init scripts, backup/deploy scripts
- keycloak/realm-export.json with colectivo realm and 5 dev test users
- supabase/config.toml and seed.sql with sample collective and items
- GitHub Actions: ci.yml (lint+typecheck+build) and deploy.yml (GHCR + SSH)
- .env.example documenting all required variables
- Fixed docker-compose issues: Studio image tag, Kong port conflict (8001),
  internal role passwords init script, Realtime METRICS_JWT_SECRET/APP_NAME

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

apps/web/src/service-worker.ts

@@ -0,0 +1,50 @@
+/// <reference types="@sveltejs/kit" />
+/// <reference no-default-lib="true"/>
+/// <reference lib="esnext" />
+/// <reference lib="webworker" />
+
+import { build, files, version } from '$service-worker';
+import { precacheAndRoute } from 'workbox-precaching';
+import { registerRoute, NavigationRoute } from 'workbox-routing';
+import { NetworkFirst, CacheFirst } from 'workbox-strategies';
+import { BackgroundSyncPlugin } from 'workbox-background-sync';
+
+declare const self: ServiceWorkerGlobalScope;
+
+const CACHE_NAME = `colectivo-${version}`;
+const ASSETS = [...build, ...files];
+
+// Precache all static assets
+precacheAndRoute(ASSETS.map((url) => ({ url, revision: version })));
+
+// Cache-first for static assets (JS, CSS, fonts, icons)
+registerRoute(
+	({ request }) =>
+		request.destination === 'style' ||
+		request.destination === 'script' ||
+		request.destination === 'font' ||
+		request.destination === 'image',
+	new CacheFirst({ cacheName: `${CACHE_NAME}-assets` })
+);
+
+// Network-first for app routes (HTML navigation)
+registerRoute(
+	new NavigationRoute(
+		new NetworkFirst({
+			cacheName: `${CACHE_NAME}-pages`,
+			networkTimeoutSeconds: 3
+		})
+	)
+);
+
+// Background Sync for pending offline operations
+const bgSyncPlugin = new BackgroundSyncPlugin('pending-ops-queue', {
+	maxRetentionTime: 24 * 60 // 24 hours
+});
+
+// Listen for messages from the app
+self.addEventListener('message', (event) => {
+	if (event.data?.type === 'SKIP_WAITING') {
+		self.skipWaiting();
+	}
+});