feat(supply): per-unit fit-out/cost-bearer/MAB/parking with object fallback (resolveUnitFacts)

- unit: add fitOutByLandlord, mieterausbaubeitragPerSqm, parkingSpots (parking = allocation from object pool)
- lib/unitFacts.resolveUnitFacts: single resolver (unit value ?? object value) used by scorer + card adapter
- matchSyncService: pre-market unit scored via resolved facts (fit-out, MAB, cost-bearer, parking allocation)
- matchCardAdapter: fit-out label/viability/investment via resolveUnitFacts
- UnitStructurePanel: consolidate ALL per-unit overrides into the one expandable row editor (price, availability, Ausbaustandard, Wer-baut-aus, MAB, parking allocation); show parking on row
- PreMarketUnitGrid/Panel: drop the duplicate per-unit fit-out select (now in the unit editor)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/domain/unit.ts

@@ -18,9 +18,12 @@ export interface PropertyUnit {
   available: boolean
   rentPricePerSqm?: number  // annual CHF/m²; falls back to property.rentPricePerSqm
   availableFrom?: string    // explicit availability date for a free unit (ISO); else derived from leases
-  // Unit-level fit-out override — falls back to property.hardFacts.fitOut when unset.
-  // Relevant for pre-market, where units of one property are matched individually.
+  // Unit-level overrides — fall back to property.hardFacts.* when unset.
+  // Relevant where units of one property are matched individually (pre-market, multi-unit).
   fitOut?: 'SHELL' | 'BASIC' | 'FULL' | 'PREMIUM'
+  fitOutByLandlord?: boolean          // wer trägt den Ausbau (Default: Objekt-Wert)
+  mieterausbaubeitragPerSqm?: number  // MAB der Einheit (Default: Objekt-Wert)
+  parkingSpots?: number               // aus dem Objekt-Pool zugeteilte Parkplätze
   leases?: Lease[]          // Mietverträge — current, historical, future
   /** @deprecated Use leases[].tenant.companyName */
   currentTenant?: string