Make live signal reads non-mutating

frontend/src/components/ui/ScoreCard.tsx

@@ -5,7 +5,7 @@ import type { DimensionScoreDetail, CompositeBreakdown } from '../../lib/types';
 interface ScoreCardProps {
   compositeScore: number | null;
   dimensions: DimensionScoreDetail[];
-  compositeBreakdown?: CompositeBreakdown;
+  compositeBreakdown?: CompositeBreakdown | null;
   /** Hide the composite ring/header when the composite is shown elsewhere
    *  (e.g. the Standing matrix) and this card only carries the dimension detail. */
   showComposite?: boolean;

frontend/src/lib/types.ts

@@ -96,7 +96,7 @@ export interface ScoreResponse {
   dimensions: DimensionScoreDetail[];
   missing_dimensions: string[];
   computed_at: string | null;
-  composite_breakdown?: CompositeBreakdown;
+  composite_breakdown?: CompositeBreakdown | null;
 }
 
 export interface DimensionScoreDetail {
@@ -104,12 +104,13 @@ export interface DimensionScoreDetail {
   score: number;
   is_stale: boolean;
   computed_at: string | null;
-  breakdown?: ScoreBreakdown;
+  breakdown?: ScoreBreakdown | null;
 }
 
 export interface RankingEntry {
   symbol: string;
   composite_score: number;
+  composite_stale: boolean;
   dimensions: DimensionScoreDetail[];
 }
 
@@ -140,9 +141,18 @@ export interface TradeSetup {
   evaluated_at: string | null;
   current_price: number | null;
   momentum_percentile?: number | null;
+  context_as_of?: TradeSetupContextAsOf | null;
   recommendation_summary?: RecommendationSummary;
 }
 
+export interface TradeSetupContextAsOf {
+  setup_detected_at: string;
+  score_computed_at: string | null;
+  sentiment_at: string | null;
+  price_date: string | null;
+  price_updated_at: string | null;
+}
+
 // Performance / outcome statistics
 export interface OutcomeBucketStats {
   total: number;