feat: F008 AI need builder — smart parse, criteria review, follow-up & weighting

Domain: ParsedNeedCriteria, FollowUpQuestion, ParseNeedResult, NeedBuilderStep, WEIGHTING_KEYS/LABELS. Services: weightingService (asset-type profiles), aiService extended with parseNeed (keyword extraction mock, 1.4s delay) and generateFollowUpQuestions. Components: NeedBuilderProgress, NeedInput, ConfidenceFieldBadge, ExtractedFieldRow, CriteriaReviewPanel, FollowUpQuestionCard, FollowUpPanel, WeightingEditor, NeedCardPreview, NeedBuilderErrorState. Page: AINeedBuilderPage replaces AISearch with 4-step flow (input → review → weighting → save).

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

src/domain/needBuilder.ts

@@ -0,0 +1,69 @@
+import type { AssetType } from './enums'
+
+export interface ParsedNeedCriteria {
+  assetType?: AssetType
+  areaRange?: { min: number; max: number }
+  preferredLocations?: string[]
+  budgetRange?: { maxPerSqm: number; maxMonthlyTotal?: number; currency: string }
+  timing?: { earliestMoveIn: string; latestMoveIn?: string; contractDurationMonths?: number; flexibleTiming: boolean }
+  mustHaveCriteria?: string[]
+  softFactors?: { minPrestige?: number; requireParking?: boolean; maxPublicTransportMinutes?: number; requireHighVisibility?: boolean }
+  infrastructureRequirements?: string[]
+  accessibilityRequirements?: string[]
+  prestigeImportance?: 'LOW' | 'MEDIUM' | 'HIGH'
+  flexibilityNeed?: 'LOW' | 'MEDIUM' | 'HIGH'
+  expansionPotential?: boolean
+  parkingNeed?: boolean
+  visibilityNeed?: 'LOW' | 'MEDIUM' | 'HIGH'
+  footfallNeed?: 'LOW' | 'MEDIUM' | 'HIGH'
+  companyName?: string
+  notes?: string
+}
+
+export interface FollowUpQuestion {
+  id: string
+  questionText: string
+  targetField: string
+  reason: string
+  suggestedAnswerOptions?: string[]
+  importance: 'required' | 'recommended' | 'optional'
+}
+
+export interface ParseNeedResult {
+  extractedCriteria: ParsedNeedCriteria
+  confidenceByField: Record<string, number>
+  missingFields: string[]
+  assumptions: string[]
+  suggestedWeights: Record<string, number>
+  followUpQuestionCandidates: FollowUpQuestion[]
+  rawSummary: string
+  promptVersion: string
+  schemaVersion: string
+}
+
+export const NeedBuilderStep = {
+  IDLE: 'idle',
+  PARSING: 'parsing',
+  PARSED_REQUIRES_REVIEW: 'parsed_requires_review',
+  CLARIFICATION_REQUIRED: 'clarification_required',
+  WEIGHTING_REVIEW: 'weighting_review',
+  READY_TO_SAVE: 'ready_to_save',
+  SAVING: 'saving',
+  SAVED: 'saved',
+  ERROR: 'error',
+} as const
+export type NeedBuilderStep = typeof NeedBuilderStep[keyof typeof NeedBuilderStep]
+
+export const WEIGHTING_KEYS = ['area', 'location', 'budget', 'timing', 'prestige', 'accessibility', 'expansionPotential', 'flexibility'] as const
+export type WeightingKey = typeof WEIGHTING_KEYS[number]
+
+export const WEIGHTING_LABELS: Record<WeightingKey, string> = {
+  area: 'Fläche',
+  location: 'Standort',
+  budget: 'Budget',
+  timing: 'Verfügbarkeit',
+  prestige: 'Prestige',
+  accessibility: 'Erreichbarkeit',
+  expansionPotential: 'Expansionspotenzial',
+  flexibility: 'Flexibilität',
+}