feat: Complete frontend i18n implementation for dashboard components

- Updated TypeScript types to support reasoning_data field
- Integrated useReasoningTranslation hook in all dashboard components:
  * ActionQueueCard: Translates PO reasoning_data and UI text
  * ProductionTimelineCard: Translates batch reasoning_data and UI text
  * OrchestrationSummaryCard: Translates all hardcoded English text
  * HealthStatusCard: Translates all hardcoded English text
- Added missing translation keys to all language files (EN, ES, EU):
  * health_status: never, critical_issues, actions_needed
  * action_queue: total, critical, important
  * orchestration_summary: ready_to_plan, run_info, took, show_more/less
  * production_timeline: Complete rebuild with new keys
- Components now support fallback for deprecated text fields
- Full multilingual support: English, Spanish, Basque

Dashboard is now fully translatable and will display reasoning in user's language.

frontend/src/api/hooks/newDashboard.ts

@@ -81,8 +81,9 @@ export interface ActionItem {
   urgency: 'critical' | 'important' | 'normal';
   title: string;
   subtitle: string;
-  reasoning: string;
-  consequence: string;
+  reasoning?: string; // Deprecated: Use reasoning_data instead
+  consequence?: string; // Deprecated: Use reasoning_data instead
+  reasoning_data?: any; // Structured reasoning data for i18n translation
   amount?: number;
   currency?: string;
   actions: ActionButton[];
@@ -111,7 +112,8 @@ export interface ProductionTimelineItem {
   progress: number;
   readyBy: string | null;
   priority: string;
-  reasoning: string;
+  reasoning?: string; // Deprecated: Use reasoning_data instead
+  reasoning_data?: any; // Structured reasoning data for i18n translation
 }
 
 export interface ProductionTimeline {