fix: clear stale search criteria on text edit, fix Zürich false-positive, improve cost breakdown and fit-out labels

- AISearch: clear parsed criteria when user manually edits text input so stale locations (e.g. Zürich) no longer persist after retyping
- needParser: fix ZURICH_SIGNALS substring bug — "kreis N" now uses word-boundary regex so "umkreis 22" no longer matches "kreis 2"
- CompareTableBody: row 9 shows full cost breakdown (Miete + NK + amortised fit-out) using FITOUT_AMORTIZATION_YEARS from constants
- FitOutCostPanel: replace local AMORTIZATION_YEARS with FITOUT_AMORTIZATION_YEARS from constants.ts (single source of truth)
- constants.ts: add FITOUT_AMORTIZATION_YEARS = 5 — change here to affect all cost calculations
- PropertyIntelligenceCard: translate raw fitOut enum to German labels (Rohbau/Grundausbau/Vollausbau/Premium-Ausbau) with explanatory tooltips; add tooltip on contract duration chip

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

src/components/match-detail/FitOutCostPanel.tsx

@@ -2,12 +2,13 @@ import { Box, Chip, Paper, Typography } from '@mui/material'
 import { HardHat } from 'lucide-react'
 import { calcFitOutInvestment } from '../../lib/fitOutUtils'
 import { DS_TEXT, DS_SURFACE, DS_BORDER } from '../../lib/ds'
+import { FITOUT_AMORTIZATION_YEARS } from '../../lib/constants'
 
 const FIT_OUT_LABELS: Record<string, string> = {
   SHELL: 'Rohbau', BASIC: 'Basisausbau', FULL: 'Vollausbau', PREMIUM: 'Premiumausbau',
 }
 
-const AMORTIZATION_YEARS = 5
+const AMORTIZATION_YEARS = FITOUT_AMORTIZATION_YEARS
 const READY_TO_MOVE_IN = new Set(['FULL', 'PREMIUM'])
 
 interface Props {
@@ -69,7 +70,7 @@ export function FitOutCostPanel({ fitOut, areaSqm, mabPerSqm, rentPricePerSqm, t
   const isWarning = !isReadyToMoveIn && totalPerYear.max > rentPerYear * 1.3
   const disclaimer = isReadyToMoveIn
     ? null
-    : 'Ausbaukosten nach CRB/BKP-Normen, amortisiert über 5 Jahre. Tatsächliche Kosten je nach Ausbauumfang.'
+    : `Ausbaukosten nach CRB/BKP-Normen, amortisiert über ${AMORTIZATION_YEARS} Jahre. Tatsächliche Kosten je nach Ausbauumfang.`
 
   return (
     <Paper sx={{ p: 2.5 }}>