feat: Phase 3 complete — push alerts, feedback scoring, S3 fallback, SPA routing, mobile CSS

- ImpactScoreService: implement getFeedbackBonus() (ST_Distance query on UserFeedback within 20km/6h)
- ImpactScoreService: trigger PushNotificationService when score >= 70
- PushNotificationService: send VAPID WebPush to spot subscribers, clean expired subs
- PushController: GET vapid-public-key, POST/DELETE subscribe with rate limiting
- SentinelHubClient: add optional $collection param, add Sentinel-3 OLCI FAI evalscript (MCI)
- IngestionService: add $collection param + HighCloudCoverageException for fallback logic
- IngestionService: add ingestWithFallback() — tries S2, falls back to S3 on high cloud
- IngestSentinelCommand: --source=auto (default) triggers ingestWithFallback
- FeedbackController: rate limiting via apiFeedbackLimiter
- Migration: push_subscription table
- rate_limiter.yaml: api_read(120/min), api_feedback(10/min), api_push(5/min)
- sw.js: service worker handling push events + notificationclick
- usePushSubscription hook: subscribe/unsubscribe lifecycle with VAPID
- SpotPanel: PushButton component integrated
- SpotPanel.css + TimelineSlider.css: mobile responsive (bottom-sheet on small screens)
- Caddyfile: SPA served at / with try_files fallback, sw.js served from root scope
- vite.config.js: build outDir → backend/public (not /spa)
- deploy/post-receive.sh: full deploy script (composer, npm build, migrations, cache, docker up)
- docs/roadmap.md: all Phase 3 + transversal items marked done

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

docker/php/Caddyfile

@@ -6,20 +6,26 @@
 :80 {
     root * /app/public
 
-    # Assets Symfony
+    # Assets Symfony (webpack encore)
     handle /bundles/* {
         file_server
     }
 
-    # SPA React (fichiers statiques buildés dans public/spa/)
-    handle /spa/* {
+    # Service worker (must be served from root scope)
+    handle /sw.js {
         file_server
     }
 
-    # Tout le reste → Symfony (front controller index.php)
-    handle {
+    # API → Symfony front controller
+    handle /api/* {
         php_server
     }
 
+    # SPA React : try static files first, fallback to index.html
+    handle {
+        try_files {path} /index.html
+        file_server
+    }
+
     encode gzip
 }