* feat: enforce strategy limits to prevent token overflow
* fix: tune token limits after real-world testing
- Relax kline max 20→30, timeframes 3→4 (tested ~41K tokens, safe under 131K)
- Restore ranking limits to original [5,10,15,20] options (only ~1.5K token impact)
- Add static coins limit (max 3) with toast notification
- Add timeframe limit toast when exceeding 4
- Log SSE token usage (prompt/completion/total) from API response
- Fix nil logger crash in claw402 data client (engine.go)
* feat: add token estimation functionality for strategy configurations
* feat: add discard changes button in Strategy Studio for unsaved modifications
* feat: retain selected strategy after saving in Strategy Studio
* feat: enhance strategy display in Strategy Studio with improved layout and sorting of token limits
* refactor: improve layout and styling of stats display in CompetitionPage
* refactor: replace select elements with NofxSelect component for improved consistency in strategy configuration forms
* style: update NofxSelect component to use smaller text size for improved readability
* feat: implement token overflow handling in strategy updates and UI
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Co-authored-by: Dean <afei.wuhao@gmail.com>
