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>

frontend/src/components/cad/InlineCadViewer.tsx

@@ -13,6 +13,7 @@ import MaterialPanel, { type IsolateMode } from './MaterialPanel'
 import { normalizeMeshName, resolvePartMaterial, remapToPartKeys, applyPBRToMaterial, previewColorForEntry, forEachMeshMaterial, type MeshRegistryEntry } from './cadUtils'
 import { fetchMaterialPBR, type MaterialPBRMap } from '../../api/assetLibraries'
 import { useGeometryMerge } from './useGeometryMerge'
+import WebGLErrorBoundary from './WebGLErrorBoundary'
 
 type ViewMode = 'solid' | 'wireframe'
 type LightPreset = 'studio' | 'warehouse' | 'sunset' | 'park' | 'city'
@@ -518,6 +519,7 @@ export default function InlineCadViewer({
 
         {/* ── Canvas area ── */}
         <div className="flex-1 relative" onClick={(e) => e.stopPropagation()}>
+          <WebGLErrorBoundary>
           <Canvas
             gl={{ powerPreference: 'high-performance', antialias: true }}
             dpr={[1, 1.5]}
@@ -571,6 +573,7 @@ export default function InlineCadViewer({
             <OrbitControls ref={controlsRef} makeDefault />
             <CameraAutoFit sceneRef={sceneRef} controlsRef={controlsRef} fitTrigger={fitTrigger} />
           </Canvas>
+          </WebGLErrorBoundary>
 
           {/* Material assignment panel */}
           {pinnedPart && (