fix: Handle both economy_cpi and economy_costs dimension IDs

- CPI sync now searches for both IDs (backend uses economy_costs,
  frontend fallback uses economy_cpi)
- DimensionAnalysisTab causal analysis recognizes both IDs
- Ensures consistency across fresh data, cached data, and fallback paths

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/components/tabs/DimensionAnalysisTab.tsx

@@ -311,6 +311,7 @@ function generateCausalAnalysis(
       break;
 
     case 'economy_cpi':
+    case 'economy_costs':  // También manejar el ID del backend
       // Análisis de CPI
       if (CPI > 3.5) {
         const excessCPI = CPI - CPI_TCO;