feat: remove EXTERNAL_MARKET result type entirely

All external market properties now surface as VERIFIED_PORTFOLIO.
Removes the type from enums, domain types, mock data, matching engine,
components, hooks, and tests — zero user-visible distinction remains.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/domain/enums.ts

@@ -14,7 +14,6 @@ export type AssetType = typeof AssetType[keyof typeof AssetType]
 // ── Result Types ──────────────────────────────────────────────────────────────
 export const ResultType = {
   VERIFIED_PORTFOLIO: 'VERIFIED_PORTFOLIO',
-  EXTERNAL_MARKET: 'EXTERNAL_MARKET',
   MAISON_WORK: 'MAISON_WORK',
   FUTURE_AVAILABILITY: 'FUTURE_AVAILABILITY',
 } as const

src/domain/pipeline.ts

@@ -5,7 +5,7 @@ export interface PipelineItem {
   title: string
   location: string
   matchScore: number
-  resultType: 'VERIFIED_PORTFOLIO' | 'EXTERNAL_MARKET' | 'MAISON_WORK' | 'FUTURE_AVAILABILITY'
+  resultType: 'VERIFIED_PORTFOLIO' | 'MAISON_WORK' | 'FUTURE_AVAILABILITY'
   stage: PipelineStage
   // Source match reference — used for navigating back to the detail page
   matchId?: string

src/domain/scoring.ts

@@ -42,7 +42,6 @@ export const DATA_QUALITY_MODIFIER = {
 export const CONFIDENCE_MODIFIER = {
   VERIFIED_HIGH:       +3,  // VERIFIED_PORTFOLIO + confidenceScore >= 0.80
   VERIFIED_MEDIUM:      0,  // VERIFIED_PORTFOLIO + confidenceScore < 0.80
-  EXTERNAL_MARKET:     -3,  // EXTERNAL_MARKET result type
   MAISON_WORK:         -2,  // MAISON_WORK — Maison Work API (slightly more trusted than scraped market)
   FUTURE_AVAILABILITY: -15, // FUTURE_AVAILABILITY — never treat as confirmed availability
   LOW_CONFIDENCE:      -10, // confidenceScore < 0.50 (stacks with above)

src/domain/unifiedResult.ts

@@ -15,14 +15,7 @@ interface UnifiedResultBase {
 }
 
 export interface VerifiedPortfolioResult extends UnifiedResultBase {
-  resultType: 'VERIFIED_PORTFOLIO'
-  property: Property
-  match: Match
-  unit?: PropertyUnit    // specific unit this match refers to
-}
-
-export interface ExternalMarketResult extends UnifiedResultBase {
-  resultType: 'EXTERNAL_MARKET' | 'MAISON_WORK'
+  resultType: 'VERIFIED_PORTFOLIO' | 'MAISON_WORK'
   property: Property
   match: Match
   unit?: PropertyUnit    // specific unit this match refers to
@@ -38,5 +31,4 @@ export interface FutureAvailabilityResult extends UnifiedResultBase {
 
 export type UnifiedMatchResult =
   | VerifiedPortfolioResult
-  | ExternalMarketResult
   | FutureAvailabilityResult