Merge branch 'feature/claude-max-simulation-review' into release/custom-0.1.86

# Conflicts:
#	backend/cmd/server/VERSION

frontend/src/i18n/locales/en.ts

@@ -1191,6 +1191,14 @@ export default {
         enabled: 'Enabled',
         disabled: 'Disabled'
       },
+      claudeMaxSimulation: {
+        title: 'Claude Max Usage Simulation',
+        tooltip:
+          'When enabled, for Claude models without upstream cache-write usage, the system deterministically maps tokens to a small input plus 1h cache creation while keeping total tokens unchanged.',
+        enabled: 'Enabled (simulate 1h cache)',
+        disabled: 'Disabled',
+        hint: 'Only token categories in usage billing logs are adjusted. No per-request mapping state is persisted.'
+      },
       supportedScopes: {
         title: 'Supported Model Families',
         tooltip: 'Select the model families this group supports. Unchecked families will not be routed to this group.',