Initial commit: Add project files

frontend/src/shared/ui/contracts/screenContract.ts

@@ -0,0 +1,30 @@
+export type StandardScreenState =
+  | 'READY' | 'LOADING' | 'EMPTY' | 'WARN' | 'ERROR'
+  | 'UNAUTHORIZED' | 'FORBIDDEN' | 'PARTIAL' | 'DIRTY'
+  | 'CONFLICT' | 'EXPIRED' | 'READONLY' | 'PROCESSING'
+
+export interface ScreenEvidenceContext {
+  asOf?: string
+  version?: string
+  datasetId?: string
+  modelVersion?: string
+  configVersion?: string
+  codeSha?: string
+  contractVersion?: string
+  evidenceHash?: string
+  projectionVersion?: string
+  watermark?: string
+  stale?: boolean
+  correlationId?: string
+  permission?: string
+  capabilityStatus?: string
+}
+
+export interface StandardScreenProps {
+  title: string
+  subtitle?: string
+  state?: StandardScreenState
+  evidence?: ScreenEvidenceContext
+  warning?: string
+  error?: Error | null
+}