Remove frontend badge/tooltip and backend counting/query infrastructure
for client affinity. Core client affinity scheduling logic is preserved.
Removed:
- GatewayCache injection in AccountHandler
- GetAccountAffinityCount/Batch/Clients methods and interface
- AffinityClientInfo struct and ClientAffinityTTL function
- /affinity-clients API endpoint and route
- Reverse index (account_affinity:*) Lua scripts
- Frontend blue badge, tooltip, and lazy-load logic
- affinity_client_count field from types and response
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>