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/domains/pipeline/tasks/render_order_line.py

@@ -208,18 +208,26 @@ def render_order_line_task(self, order_line_id: str):
             cad_name = cad_file.original_name if cad_file else "?"
             # Load render_position for rotation values (per-product takes priority, falls back to global)
             rotation_x = rotation_y = rotation_z = 0.0
+            focal_length_mm = None
+            sensor_width_mm = None
             if line.render_position_id:
                 from app.models.render_position import ProductRenderPosition
                 rp = session.get(ProductRenderPosition, line.render_position_id)
                 if rp:
                     rotation_x, rotation_y, rotation_z = rp.rotation_x, rp.rotation_y, rp.rotation_z
-                    emit(order_line_id, f"Render position: '{rp.name}' ({rotation_x}°, {rotation_y}°, {rotation_z}°)")
+                    focal_length_mm = rp.focal_length_mm
+                    sensor_width_mm = rp.sensor_width_mm
+                    emit(order_line_id, f"Render position: '{rp.name}' ({rotation_x}°, {rotation_y}°, {rotation_z}°)" +
+                         (f" focal_length={focal_length_mm}mm" if focal_length_mm else ""))
             elif line.global_render_position_id:
                 from app.models import GlobalRenderPosition
                 grp = session.get(GlobalRenderPosition, line.global_render_position_id)
                 if grp:
                     rotation_x, rotation_y, rotation_z = grp.rotation_x, grp.rotation_y, grp.rotation_z
-                    emit(order_line_id, f"Global render position: '{grp.name}' ({rotation_x}°, {rotation_y}°, {rotation_z}°)")
+                    focal_length_mm = grp.focal_length_mm
+                    sensor_width_mm = grp.sensor_width_mm
+                    emit(order_line_id, f"Global render position: '{grp.name}' ({rotation_x}°, {rotation_y}°, {rotation_z}°)" +
+                         (f" focal_length={focal_length_mm}mm" if focal_length_mm else ""))
 
             emit(order_line_id, f"Starting render for {cad_name} ({len(part_colors)} coloured parts)")
 
@@ -334,7 +342,10 @@ def render_order_line_task(self, order_line_id: str):
                         rotation_x=rotation_x,
                         rotation_y=rotation_y,
                         rotation_z=rotation_z,
+                        camera_orbit=bool(template.camera_orbit) if template else True,
                         usd_path=usd_render_path,
+                        focal_length_mm=focal_length_mm,
+                        sensor_width_mm=sensor_width_mm,
                     )
                     success = True
                     render_log = {
@@ -391,6 +402,8 @@ def render_order_line_task(self, order_line_id: str):
                     rotation_x=rotation_x,
                     rotation_y=rotation_y,
                     rotation_z=rotation_z,
+                    focal_length_mm=focal_length_mm,
+                    sensor_width_mm=sensor_width_mm,
                     job_id=order_line_id,
                     order_line_id=order_line_id,
                     noise_threshold=noise_threshold,