feat: unit-first architecture — floor + street as primary card title

Every VERIFIED_PORTFOLIO property now has explicit units in mock data
(added to prop-002, prop-008, prop-009, prop-010, prop-011, prop-014).

PropertyUnit extracted to domain/unit.ts with formatFloorLabel,
formatUnitTitle, formatMultiUnitFloors helpers; re-exported from
property.ts so all existing imports are unaffected.

Cards now show floor + street as the primary title:
- Specific unit match: "1.OG Nord · Zollstrasse 12"
- Multi-unit (whole building): "1.OG–3.OG · Zollstrasse 12"
- EG retail: "EG Verkauf · Löwenplatz 3"
Building name (e.g. "Bürofläche Zollstrasse 12") appears as subtitle.
Both IntelligenceMatchCard (grid) and MatchCardCompact (list) updated.

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

src/features/matching/matchCardAdapter.ts

@@ -11,6 +11,7 @@ import type {
   MatchCardReason,
 } from '../../components/match-card/MatchCardViewModel'
 import { getCityIntelligence } from '../../lib/locationIntelligence'
+import { formatUnitTitle, formatMultiUnitFloors } from '../../domain/unit'
 
 const HARD_CRITERIA = new Set(['area', 'location', 'budget', 'timing'])
 
@@ -50,8 +51,22 @@ export function buildMatchCardViewModel(
     ? `${city}${district ? `, ${district}` : ''}`
     : signal?.locationHint ?? '–'
 
-  // For PRE-MARKET: title comes from unit if available, then signal, then property
+  // Unit-first title: specific unit → floor range of all units → signal → property
+  let cardTitle: string
+  let propertySubtitle: string | undefined
 
+  if (unit && property?.address) {
+    cardTitle = formatUnitTitle(unit, property.address)
+    propertySubtitle = property.title
+  } else if (signal?.title) {
+    cardTitle = signal.title
+  } else if (property?.units && property.units.length > 0 && property.address) {
+    const floorRange = formatMultiUnitFloors(property.units)
+    cardTitle = `${floorRange} · ${property.address.street} ${property.address.houseNumber}`
+    propertySubtitle = property.title
+  } else {
+    cardTitle = property?.title ?? signal?.companyName ?? signal?.locationHint ?? '–'
+  }
 
   const availabilityLabel =
     property?.availabilityDate ??
@@ -74,12 +89,8 @@ export function buildMatchCardViewModel(
 
   return {
     id: result.matchId,
-    title:
-      signal?.title ??
-      property?.title ??
-      signal?.companyName ??
-      signal?.locationHint ??
-      '–',
+    title: cardTitle,
+    propertySubtitle,
     resultType,
     assetType: property?.assetType,
     matchScore,