feat: support claude opus 5

ui/src/lib/model-catalogs.ts

@@ -982,6 +982,18 @@ export const MODEL_CATALOGS: Record<string, ProviderCatalog> = {
           haiku: 'claude-haiku-4-5-20251001',
         },
       },
+      {
+        id: 'claude-opus-5',
+        name: 'Claude Opus 5',
+        description: 'Latest premium model',
+        extendedContext: true,
+        presetMapping: {
+          default: 'claude-opus-5',
+          opus: 'claude-opus-5',
+          sonnet: 'claude-sonnet-5',
+          haiku: 'claude-haiku-4-5-20251001',
+        },
+      },
       {
         id: 'claude-opus-4-8',
         name: 'Claude Opus 4.8',