feat: add auto trigger CD on quota reset

[Achilng]

Summary

• Add auto_trigger_cd config option that automatically sends a minimal message to Claude API when quota resets,
  pre-starting the 5-hour cooldown timer to reduce wait time when quota is later exhausted
• Trigger CD for cookies whose session/weekly quota windows expire, and freshly added cookies with no active session
  window
• Use cheapest model (claude-haiku-4-5-20251001) with max_tokens=1 to minimize quota impact

How it works

Claude's 5h session quota timer starts from the first message sent, not when quota runs out. By sending a trigger
message right when quota resets (or when a new cookie is added), the next 5h window starts immediately — reducing
effective wait time from hours to minutes.

Changes

• src/config/clewdr_config.rs: Add auto_trigger_cd boolean config field (default: false)
• src/services/cd_scheduler.rs: New independent background scheduler (60s polling) that detects expired quota
  windows via usage API and triggers CD
• src/claude_code_state/chat.rs: Add trigger_cd() method that authenticates and sends a minimal request
• src/router.rs: Spawn scheduler after CookieActorHandle creation
• src/services/mod.rs: Register new module
• Frontend: Add auto_trigger_cd toggle in Config UI with en/zh translations

[LeenHawk]

You don't understand.... You could ask /usage to api.anthropic.com or https://claude.ai/settings/usage , then you don't need to send message to /message

[Achilng]

My implementation already uses fetch_usage_metrics(), which internally calls api.anthropic.com/api/oauth/usage to detect quota resets. The call to /v1/messages is only used to trigger the cooldown timer after a reset is detected, querying /usage alone does not start the 5-hour countdown.

[LeenHawk]

My implementation already uses fetch_usage_metrics(), which internally calls api.anthropic.com/api/oauth/usage to detect quota resets. The call to /v1/messages is only used to trigger the cooldown timer after a reset is detected, querying /usage alone does not start the 5-hour countdown.

you don't need to send a message to make a credential healthy!