fix(bom): preserve resolved primary material

furniture-3d-system/src/server/services/bom-costing/bom-costing-processing.service.test.ts

@@ -218,7 +218,7 @@ const supportedV3AnalysisResult = {
   schemaVersion: 'competitor-analysis/v3' as const,
   structureBlueprint: {
     schemaVersion: 'structure-blueprint/v2' as const,
-    knowledgeVersion: 'structure-priors/2026-08-13-v8',
+    knowledgeVersion: 'structure-priors/2026-08-13-v9',
     supportStatus: 'SUPPORTED' as const,
     categorySkill: {
       selectedSkillId: 'TABLE',

furniture-3d-system/src/server/services/bom-costing/bom-costing-production-27.integration.test.ts

@@ -276,7 +276,7 @@ async function runStructurePipeline(orderedFixture: readonly ProductionWardrobe2
   }
   const checkpoint = readBomCostingStructureCheckpoint({
     kind: 'BOM_COSTING_STRUCTURE_CHECKPOINT',
-    version: 12,
+    version: 13,
     sourceSkuIds: snapshot.skus.map((sku) => sku.externalSkuId),
     blueprint,
     completedGroupKeys: [],

furniture-3d-system/src/server/services/bom-costing/bom-costing-structure-blueprint.test.ts

@@ -222,7 +222,7 @@ describe('BOM v7 结构蓝图与 SKU 展开', () => {
     const group = blueprint.structureGroups[0]!
     const checkpointValue = {
       kind: 'BOM_COSTING_STRUCTURE_CHECKPOINT',
-      version: 12,
+      version: 13,
       sourceSkuIds: ['sku-1'],
       blueprint,
       completedGroupKeys: [group.structureGroupKey],
@@ -307,7 +307,7 @@ describe('BOM v7 结构蓝图与 SKU 展开', () => {
     )
     const checkpoint = readBomCostingStructureCheckpoint({
       kind: 'BOM_COSTING_STRUCTURE_CHECKPOINT',
-      version: 12,
+      version: 13,
       sourceSkuIds: snapshot.skus.map((sku) => sku.externalSkuId),
       blueprint,
       completedGroupKeys: blueprint.structureGroups.map((group) => group.structureGroupKey),

furniture-3d-system/src/server/services/bom-costing/bom-costing-structure-blueprint.ts

@@ -140,9 +140,9 @@ const instantiationPayloadSchema = z.object({
 
 const BOM_COSTING_STRUCTURE_CHECKPOINT_KIND =
   'BOM_COSTING_STRUCTURE_CHECKPOINT' as const
-// Version 12 invalidates instantiated lines created before trusted slot
-// dimensions were preserved and axis-labelled evidence was parsed safely.
-const BOM_COSTING_STRUCTURE_CHECKPOINT_VERSION = 12 as const
+// Version 13 invalidates instantiated lines created before unrecognized
+// component material prose stopped shadowing a resolved primary cost family.
+const BOM_COSTING_STRUCTURE_CHECKPOINT_VERSION = 13 as const
 
 const bomCostingStructureCheckpointSchema = z.object({
   kind: z.literal(BOM_COSTING_STRUCTURE_CHECKPOINT_KIND),
@@ -954,6 +954,16 @@ function materialDescriptorFromRecords(records: readonly MaterialFactRecord[]) {
   )))
 }
 
+function materialDescriptorLayer(records: readonly MaterialFactRecord[]) {
+  const descriptors = records.flatMap((record) => (
+    materialDescriptorsFromText(materialFactText(record))
+  ))
+  return {
+    hasRecognizedDescriptor: descriptors.length > 0,
+    descriptor: selectSingleMaterialDescriptor(descriptors),
+  }
+}
+
 function explicitPrimaryMaterialDescriptor(input: {
   materialRecords: readonly MaterialFactRecord[]
   skuId: string
@@ -987,14 +997,16 @@ function resolvePhysicalMaterialDescriptor(input: {
   ))
   // A conflict at a higher-priority scope remains unknown; a broader fact or
   // model guess must not silently choose one side of that conflict.
-  if (skuSlotRecords.length > 0) return materialDescriptorFromRecords(skuSlotRecords)
+  const skuSlotMaterial = materialDescriptorLayer(skuSlotRecords)
+  if (skuSlotMaterial.hasRecognizedDescriptor) return skuSlotMaterial.descriptor
 
   const productExactSlotRecords = slotRecords.filter((record) => (
     !isBomCostingSkuSpecificFact(record, input.sku.externalSkuId) &&
     materialFactNamesConcreteComponent(record)
   ))
-  if (productExactSlotRecords.length > 0) {
-    return materialDescriptorFromRecords(productExactSlotRecords)
+  const productExactSlotMaterial = materialDescriptorLayer(productExactSlotRecords)
+  if (productExactSlotMaterial.hasRecognizedDescriptor) {
+    return productExactSlotMaterial.descriptor
   }
 
   if (canInheritPrimaryMaterial(input.slot)) {
@@ -1008,7 +1020,8 @@ function resolvePhysicalMaterialDescriptor(input: {
     if (costFamilyDescriptor) return costFamilyDescriptor
   }
 
-  if (slotRecords.length > 0) return materialDescriptorFromRecords(slotRecords)
+  const genericSlotMaterial = materialDescriptorLayer(slotRecords)
+  if (genericSlotMaterial.hasRecognizedDescriptor) return genericSlotMaterial.descriptor
   if (!canInheritPrimaryMaterial(input.slot)) return undefined
   return explicitPrimaryMaterialDescriptor({
     materialRecords: allMaterialRecords,

furniture-3d-system/src/server/services/bom-costing/bom-costing-structure-knowledge.ts

@@ -26,7 +26,7 @@ import {
 } from './category-skills'
 
 export const BOM_COSTING_STRUCTURE_KNOWLEDGE_VERSION =
-  'structure-priors/2026-08-13-v8' as const
+  'structure-priors/2026-08-13-v9' as const
 
 export type BomCostingStructureSlotPrior = BomCostingCategoryComponentDefinition
 

furniture-3d-system/src/server/services/bom-costing/test-fixtures/production-mobile-rattan-storage-rack-2.fixture.ts

@@ -148,6 +148,15 @@ export function buildProductionMobileRattanStorageRack2FactSnapshot(): BomCostin
             basis: 'SOURCE_TEXT',
             confidence: 0.99,
           },
+          {
+            factId: 'IMG_0039_fact_004',
+            kind: 'MATERIAL',
+            subject: '上层托盘及置物箱框体',
+            value: '表面呈棕色木纹外观',
+            relatedSkuIds: [],
+            basis: 'IMAGE',
+            confidence: 0.9,
+          },
           {
             factId: 'IMG_0039_fact_008',
             kind: 'STRUCTURE',