Scaffold weather app: reception forecast display + shared internal API

- Backend: Fastify service polling Met Office DataHub (Global Spot: hourly,
  three-hourly, daily endpoints) with Open-Meteo fallback, hourly refresh.
  Reuses settings' hotel_location/met_office integrations (same pattern as
  hvac's lib/weather.js) rather than its own credential copy.
- Three display tiers stored in one forecast_points table: today (hourly),
  next 2 days (3-hourly), days 4-7 (plain daily) - 7 days total.
- Public /api/public/forecast (no auth) feeds the reception kiosk display;
  /api/internal/forecast (WEATHER_SECRET bearer) lets other apps read the
  stored forecast instead of polling providers themselves; /api/admin/*
  (normal JWT + settings cap) is the staff status/refresh page.
- Frontend: root / is the public full-screen Display (no AuthGate at all -
  first genuinely public app in the stack); /admin is the authed status
  page. apps.base_path is /weather/admin so the portal card opens the
  admin view directly, precedented by forecasting's history sub-route.
- LXC 131 / 10.10.10.131, registered in auth/src/db.js, push-to-forgejo.sh,
  and stack-init/install-stack.sh (deploy_weather + --only dispatch + full
  install chain).
- Typechecks and builds clean; not yet deployed.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/vite.config.ts

@@ -0,0 +1,34 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+import { VitePWA } from 'vite-plugin-pwa'
+
+export default defineConfig({
+  base: '/weather/',
+  plugins: [
+    react(),
+    VitePWA({
+      strategies: 'injectManifest',
+      srcDir: 'src',
+      filename: 'sw.js',
+      registerType: 'autoUpdate',
+      manifest: {
+        name: 'Weather',
+        short_name: 'Weather',
+        // Root, not /admin — installing this PWA is for the reception kiosk screen,
+        // so "open the app" should land straight on the public display.
+        start_url: '/weather/',
+        scope: '/weather/',
+        display: 'standalone',
+        theme_color: '#0ea5e9',
+        background_color: '#0ea5e9',
+        icons: [
+          { src: '/weather/icons/icon-192.png', sizes: '192x192', type: 'image/png' },
+          { src: '/weather/icons/icon-512.png', sizes: '512x512', type: 'image/png' },
+        ],
+      },
+      injectManifest: {
+        globPatterns: ['**/*.{js,css,html,ico,png,svg}'],
+      },
+    }),
+  ],
+})