feat: per-position camera settings, material alias dialog, product delete, media browser links

- Per-render-position focal_length_mm/sensor_width_mm (DB → pipeline → Blender)
- FOV-based camera distance with min clamp fix for wide-angle lenses
- Unmapped materials blocking dialog on "Dispatch Renders" with batch alias creation
- Material check endpoint (GET /orders/{id}/check-materials)
- Batch alias endpoint (POST /materials/batch-aliases)
- Quick-map "No alias" badges on Materials page
- Full product hard-delete with storage cleanup (MinIO + disk files + orphaned CadFile)
- Delete button on ProductDetail page with confirmation
- Clickable product names in Media Browser (links to product page)
- Single-line render dispatch/retry (POST /orders/{id}/lines/{id}/dispatch-render)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/app/api/routers/worker.py

@@ -429,14 +429,20 @@ async def scale_workers(
 
     compose_dir = os.environ.get("COMPOSE_PROJECT_DIR", "/compose")
     compose_file = os.path.join(compose_dir, "docker-compose.yml")
+    # Derive project name from compose dir on host (directory name = project name).
+    # Inside the container the compose file is at /compose, but the host project
+    # dir name determines the container naming prefix (e.g. "schaefflerautomat").
+    compose_project = os.environ.get("COMPOSE_PROJECT_NAME", "schaefflerautomat")
 
     def _scale() -> subprocess.CompletedProcess:
         return subprocess.run(
             [
                 "docker", "compose",
                 "-f", compose_file,
+                "-p", compose_project,
                 "up",
                 "--scale", f"{body.service}={body.count}",
+                "--no-build",
                 "--no-recreate",
                 "-d",
             ],