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/api/materials.ts

@@ -87,3 +87,37 @@ export async function seedAliases(): Promise<{ inserted: number; total: number }
   const res = await api.post<{ inserted: number; total: number }>('/materials/seed-aliases')
   return res.data
 }
+
+// --- Material check / batch alias ---
+
+export interface MaterialSuggestion {
+  id: string
+  name: string
+  schaeffler_code: string
+}
+
+export interface UnmappedMaterial {
+  raw_name: string
+  suggestions: MaterialSuggestion[]
+}
+
+export interface UnmappedMaterialCheck {
+  unmapped: UnmappedMaterial[]
+  total_materials: number
+  mapped_count: number
+}
+
+export async function checkOrderMaterials(orderId: string): Promise<UnmappedMaterialCheck> {
+  const res = await api.get<UnmappedMaterialCheck>(`/orders/${orderId}/check-materials`)
+  return res.data
+}
+
+export async function batchCreateAliases(
+  mappings: Array<{ alias: string; material_id: string }>
+): Promise<{ created: number; skipped: number }> {
+  const res = await api.post<{ created: number; skipped: number }>(
+    '/materials/batch-aliases',
+    { mappings }
+  )
+  return res.data
+}