fix: finanzplan scenario selector — load from API, no hardcoded UUID

Replaces the FM-name-based 'wandeldarlehen' hack with a proper scenario
picker. Scenarios are fetched from /api/finanzplan, default is selected
automatically. Dropdown appears when multiple scenarios exist.

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

pitch-deck/components/slides/FinanzplanSlide.tsx

@@ -61,8 +61,12 @@ function formatCell(v: number | undefined): string {
   return Math.round(v).toLocaleString('de-DE', { maximumFractionDigits: 0 })
 }
 
+interface FpScenario { id: string; name: string; is_default: boolean }
+
 export default function FinanzplanSlide({ lang, investorId, preferredScenarioId }: FinanzplanSlideProps) {
   const [sheets, setSheets] = useState<SheetMeta[]>([])
+  const [scenarios, setScenarios] = useState<FpScenario[]>([])
+  const [selectedScenarioId, setSelectedScenarioId] = useState<string>('')
   const [activeSheet, setActiveSheet] = useState<string>('personalkosten')
   const [rows, setRows] = useState<SheetRow[]>([])
   const [loading, setLoading] = useState(false)
@@ -77,19 +81,26 @@ export default function FinanzplanSlide({ lang, investorId, preferredScenarioId
     [fm.activeResults],
   )
 
-  // Determine fp_scenario_id from the active FM scenario name
-  const fpScenarioParam = fm.activeScenario?.name?.toLowerCase().includes('wandeldarlehen')
-    ? '?scenarioId=c0000000-0000-0000-0000-000000000200'
-    : ''
-
-  // Load sheet list
+  // Load sheet list + scenarios
   useEffect(() => {
     fetch('/api/finanzplan', { cache: 'no-store' })
       .then(r => r.json())
-      .then(data => setSheets(data.sheets || []))
+      .then(data => {
+        setSheets(data.sheets || [])
+        const scens: FpScenario[] = data.scenarios || []
+        setScenarios(scens)
+        // Pick default scenario on first load
+        if (!selectedScenarioId) {
+          const def = scens.find(s => s.is_default) ?? scens[0]
+          if (def) setSelectedScenarioId(def.id)
+        }
+      })
       .catch(() => {})
+  // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [])
 
+  const scenarioParam = selectedScenarioId ? `?scenarioId=${selectedScenarioId}` : ''
+
   // Load sheet data
   const loadSheet = useCallback(async (name: string) => {
     if (name === 'kpis' || name === 'charts') {
@@ -99,12 +110,12 @@ export default function FinanzplanSlide({ lang, investorId, preferredScenarioId
     }
     setLoading(true)
     try {
-      const r = await fetch(`/api/finanzplan/${name}${fpScenarioParam}`, { cache: 'no-store' })
+      const r = await fetch(`/api/finanzplan/${name}${scenarioParam}`, { cache: 'no-store' })
       const data = await r.json()
       setRows(data.rows || [])
     } catch { /* ignore */ }
     setLoading(false)
-  }, [fpScenarioParam])
+  }, [scenarioParam])
 
   useEffect(() => { loadSheet(activeSheet) }, [activeSheet, loadSheet])
 
@@ -112,7 +123,7 @@ export default function FinanzplanSlide({ lang, investorId, preferredScenarioId
   const handleCompute = async () => {
     setComputing(true)
     try {
-      await fetch('/api/finanzplan/compute', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: '{}' })
+      await fetch('/api/finanzplan/compute', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ scenarioId: selectedScenarioId || undefined }) })
       await loadSheet(activeSheet)
     } catch { /* ignore */ }
     setComputing(false)
@@ -182,6 +193,17 @@ export default function FinanzplanSlide({ lang, investorId, preferredScenarioId
           </button>
         ))}
         <div className="flex-1" />
+        {scenarios.length > 1 && (
+          <select
+            value={selectedScenarioId}
+            onChange={e => setSelectedScenarioId(e.target.value)}
+            className="text-[10px] bg-white/[0.06] text-white/60 border border-white/10 rounded-lg px-2 py-1.5 mr-2"
+          >
+            {scenarios.map(s => (
+              <option key={s.id} value={s.id}>{s.name}{s.is_default ? ' ★' : ''}</option>
+            ))}
+          </select>
+        )}
         <button
           onClick={handleCompute}
           disabled={computing}