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/domain/property.ts

@@ -4,6 +4,9 @@ import type {
 } from './enums'
 import { AvailabilityStatus as AS } from './enums'
 
+// Re-export unit types so all existing imports from 'property' continue to work
+export type { PropertyUnit, UnitBundle, UnitNeedMatch } from './unit'
+
 // ── Location / Address ────────────────────────────────────────────────────────
 
 export interface Location {
@@ -83,49 +86,6 @@ export interface SoftFactors {
   infrastructureNotes?: string
 }
 
-// ── Floor / Unit structure ────────────────────────────────────────────────────
-
-export interface PropertyUnit {
-  id: string
-  propertyId?: string       // FK to parent Property (set when stored independently)
-  floorLevel: number        // 0=EG, 1=1.OG, -1=UG
-  unitLabel?: string        // e.g. "Ost", "West", "Einheit A"
-  areaSqm: number
-  available: boolean
-  rentPricePerSqm?: number
-  currentTenant?: string
-  leaseTerm?: string
-  leaseEndDate?: string
-  // Flexible letting
-  isFlexible?: boolean      // can be partially leased (Teilfläche)
-  minLettableSqm?: number   // minimum area that can be leased standalone
-  offeredSqm?: number       // currently offered area (≤ areaSqm); undefined = full unit
-  // Unit-level pre-market release
-  schattenmarktRelease?: {
-    enabled: boolean
-    availableFrom?: string  // ISO date; overrides property-level leaseEndDate for this unit
-  }
-}
-
-// A bundle groups multiple free units for a combined offer
-export interface UnitBundle {
-  unitIds: string[]
-  combinedSqm: number
-  label: string             // e.g. "1.OG + 2.OG"
-}
-
-// Result of unit-level need matching
-export interface UnitNeedMatch {
-  needId: string
-  tenantName: string
-  tenantCompany?: string
-  requiredSqmMin: number
-  requiredSqmMax: number
-  matchScore: number
-  matchType: 'exact' | 'partial' | 'bundle'  // how the unit satisfies the need
-  suggestedSqm?: number     // for partial: how much of the unit to offer
-}
-
 // ── Property ──────────────────────────────────────────────────────────────────
 
 export interface Property {