ZhouYongyou f1e981b207 fix(decision+trader): limit candidate coins & fix news collection ...

## Changes

### 1. decision/engine.go
- Fix calculateMaxCandidates to enforce proper limits (was returning all candidates)
- Dynamic limits based on position count:
  * 0 positions: max 30 candidates
  * 1 position: max 25 candidates
  * 2 positions: max 20 candidates
  * 3+ positions: max 15 candidates
- Prevents Prompt bloat when users configure many coins

### 2. trader/auto_trader.go
- Fix news collection to use actual positions + candidates (was hardcoded to BTC only)
- Add extractNewsSymbols() helper function
- Collect news for:
  * All current positions (highest priority)
  * Top 5 candidate coins
  * Always include BTC (market indicator)
  * Max 10 coins total (avoid excessive API calls)
- Properly convert symbols for news API (lowercase, remove USDT suffix)

## Impact
- Prevents excessive market data fetching
- Makes news feature actually useful (was only fetching BTC news)
- Better resource utilization

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

2025-11-05 00:23:04 +08:00

..

aster_trader.go

fix: 修復5個關鍵交易bug（保證金計算、部分平倉統計、止損止盈分離、雙向持倉）

2025-11-04 18:36:39 +08:00

auto_trader.go

fix(decision+trader): limit candidate coins & fix news collection

2025-11-05 00:23:04 +08:00

binance_futures.go

fix: 自動處理小額倉位，添加三層防護機制

2025-11-04 21:53:55 +08:00

hyperliquid_trader.go

fix(hyperliquid): use Withdrawable field as primary source for available balance

2025-11-04 22:20:59 +08:00

interface.go

fix: 修復5個關鍵交易bug（保證金計算、部分平倉統計、止損止盈分離、雙向持倉）

2025-11-04 18:36:39 +08:00