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>

render-worker/scripts/_blender_args.py

@@ -63,6 +63,16 @@ def parse_args() -> SimpleNamespace:
         _usd_idx = sys.argv.index("--usd-path")
         usd_path = sys.argv[_usd_idx + 1] if _usd_idx + 1 < len(sys.argv) else ""
 
+    focal_length_mm = None
+    if "--focal-length" in sys.argv:
+        _fl_idx = sys.argv.index("--focal-length")
+        focal_length_mm = float(sys.argv[_fl_idx + 1]) if _fl_idx + 1 < len(sys.argv) else None
+
+    sensor_width_mm_override = None
+    if "--sensor-width" in sys.argv:
+        _sw_idx = sys.argv.index("--sensor-width")
+        sensor_width_mm_override = float(sys.argv[_sw_idx + 1]) if _sw_idx + 1 < len(sys.argv) else None
+
     if template_path and not os.path.isfile(template_path):
         print(f"[blender_render] ERROR: template not found: {template_path}")
         sys.exit(1)
@@ -96,4 +106,6 @@ def parse_args() -> SimpleNamespace:
         mesh_attributes=mesh_attributes,
         usd_path=usd_path,
         use_template=bool(template_path),
+        focal_length_mm=focal_length_mm,
+        sensor_width_mm=sensor_width_mm_override,
     )