feat: translate OpportunityPrioritizer component to English

Complete Spanish-to-English translation of the OpportunityPrioritizer component:

Translation Keys Added (en.json & es.json):
- opportunityPrioritizer.title: Prioritized Opportunities
- opportunityPrioritizer.subtitle: Initiative count with context
- opportunityPrioritizer.totalSavingsIdentified: Total Savings
- opportunityPrioritizer.quickWins/assistance/optimization: Tier labels
- opportunityPrioritizer.startHere: START HERE badge
- opportunityPrioritizer.priority1: Priority #1
- opportunityPrioritizer.nextSteps: Next Steps
- opportunityPrioritizer.annualSavings/volume/timeline/months
- opportunityPrioritizer.allOpportunities: Section title
- opportunityPrioritizer.valueEffort: Value / Effort
- opportunityPrioritizer.methodology: Methodology note
- opportunityPrioritizer.tierLabels.{automate,assist,augment}
- opportunityPrioritizer.timelines.{automate,assist,augment}

Component Changes (OpportunityPrioritizer.tsx):
- Added useTranslation import and hook usage
- Replaced all hardcoded Spanish strings with t() calls
- Dynamic translation of tier labels and timelines
- Proper i18n for month ranges (inMonths with interpolation)

This completes the translation of all visible Spanish text in the
Roadmap tab's opportunity prioritization section.

https://claude.ai/code/session_c61d4539-cc2e-4386-8191-ec167cef65a5

frontend/locales/es.json

@@ -1804,5 +1804,41 @@
         }
       }
     }
+  },
+  "opportunityPrioritizer": {
+    "title": "Oportunidades Priorizadas",
+    "subtitle": "{{count}} iniciativas ordenadas por potencial de ahorro y factibilidad",
+    "whereAreOpportunities": "¿Dónde están las oportunidades?",
+    "totalSavingsIdentified": "Ahorro Total Identificado",
+    "annual": "anuales",
+    "quickWins": "Quick Wins (AUTOMATE)",
+    "assistance": "Asistencia (ASSIST)",
+    "optimization": "Optimización (AUGMENT)",
+    "inMonths": "en {{count}} meses",
+    "startHere": "EMPIEZA AQUÍ",
+    "priority1": "Prioridad #1",
+    "annualSavings": "Ahorro Anual",
+    "volume": "Volumen",
+    "timeline": "Timeline",
+    "months": "meses",
+    "nextSteps": "Próximos Pasos",
+    "allOpportunities": "Todas las Oportunidades Priorizadas",
+    "savings": "Ahorro",
+    "valueEffort": "Valor / Esfuerzo",
+    "value": "Valor",
+    "effort": "Esfuerzo",
+    "viewMore": "Ver {{count}} oportunidades más",
+    "methodology": "Metodología de priorización:",
+    "methodologyDescription": "Las oportunidades se ordenan por potencial de ahorro TCO (volumen × tasa de contención × diferencial CPI). La clasificación de tier AUTOMATE/ASSIST/AUGMENT se basa en el Agentic Readiness Score considerando predictibilidad (CV AHT), resolvibilidad (FCR + Transfer), volumen, calidad de datos y simplicidad del proceso.",
+    "tierLabels": {
+      "automate": "Automatizar",
+      "assist": "Asistir",
+      "augment": "Aumentar"
+    },
+    "timelines": {
+      "automate": "3-6 meses",
+      "assist": "6-9 meses",
+      "augment": "9-12 meses"
+    }
   }
 }