feat(supply): unit-centric fit-out & overview — per-unit fit-out, editable demand budget, multi-unit price/availability

- domain/unit: optional per-unit fitOut override (falls back to property.hardFacts.fitOut)
- matchSyncService: pre-market unit scored with its own fitOut; matchCardAdapter prefers unit fitOut
- PreMarketUnitGrid/PreMarketPanel: per-unit Ausbaustandard override in the release list (default "Wie Objekt")
- PropertyDetailOverview: edit/read "Wer baut aus?" for existing listings (SHELL/BASIC), central FIT_OUT_LABELS
- Phase 1 unit-centric overview: header shows area+count, price as range, "Verfügbar ab → pro Einheit"; unit table shows per-unit price + availability; "Objekt & Lage" labels marked as object-defaults for multi-unit
- NeedExtendedRequirements: "Eigenes Ausbaubudget" only shown when min fit-out set + clearer helper text
- UnitStructurePanel: spin-off prefill carries fitOutByLandlord

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

src/features/matching/matchCardAdapter.ts

@@ -152,28 +152,29 @@ export function buildMatchCardViewModel(
     preMarketUnit: unit,
     preMarketAllUnits: property?.units,
     fitOutLabel: (() => {
-      const fitOut = property?.hardFacts?.fitOut
+      // Einheit-Ausbau hat Vorrang vor dem Objekt-Ausbau (Pre-Market)
+      const fitOut = unit?.fitOut ?? property?.hardFacts?.fitOut
       if (!fitOut) return undefined
       const LABELS: Record<string, string> = { SHELL: 'Rohbau', BASIC: 'Basisausbau', FULL: 'Vollausbau', PREMIUM: 'Premiumausbau' }
-      const mab = property.hardFacts?.mieterausbaubeitragPerSqm
+      const mab = property?.hardFacts?.mieterausbaubeitragPerSqm
       if (fitOut === 'FULL' || fitOut === 'PREMIUM') return `${LABELS[fitOut]} — bezugsfertig`
       if (mab) return `${LABELS[fitOut]} + CHF ${mab} MAB`
       return LABELS[fitOut] ?? fitOut
     })(),
     fitOutViable: (() => {
-      const fitOut = property?.hardFacts?.fitOut
+      const fitOut = unit?.fitOut ?? property?.hardFacts?.fitOut
       if (!fitOut) return undefined
       if (fitOut === 'FULL' || fitOut === 'PREMIUM') return true
-      const mab = property.hardFacts?.mieterausbaubeitragPerSqm ?? 0
+      const mab = property?.hardFacts?.mieterausbaubeitragPerSqm ?? 0
       if (fitOut === 'BASIC' && mab >= 150) return true
       if (fitOut === 'SHELL' && mab >= 350) return true
       return undefined
     })(),
     fitOutInvestment: (() => {
-      const fitOut = property?.hardFacts?.fitOut
+      const fitOut = unit?.fitOut ?? property?.hardFacts?.fitOut
       if (!fitOut || fitOut === 'FULL' || fitOut === 'PREMIUM') return undefined
-      const mab = property.hardFacts?.mieterausbaubeitragPerSqm ?? 0
-      const area = property.areaSqm ?? 0
+      const mab = property?.hardFacts?.mieterausbaubeitragPerSqm ?? 0
+      const area = unit?.areaSqm ?? property?.areaSqm ?? 0
       return calcFitOutInvestment(fitOut, area, mab, 0) ?? undefined
     })(),
     isDivisible: property?.units ? property.units.length > 1 : false,