feat: add OI ranking data support and fix trader config update issues

- Add OI ranking data fetching and formatting for AI prompts
- Fix trader update not saving strategy_id, ai_model_id, initial_balance
- Fix AI API key not set for non-qwen/deepseek providers
- Add strategy_id to trader config API response
- Remove old trader from memory before reloading on update
- Clean up unused useTraderActions.ts

api/strategy.go

@@ -449,6 +449,16 @@ func (s *Server) handleStrategyTestRun(c *gin.Context) {
 		marketDataMap[coin.Symbol] = data
 	}
 
+	// Fetch quantitative data for each candidate coin
+	symbols := make([]string, 0, len(candidates))
+	for _, c := range candidates {
+		symbols = append(symbols, c.Symbol)
+	}
+	quantDataMap := engine.FetchQuantDataBatch(symbols)
+
+	// Fetch OI ranking data (market-wide position changes)
+	oiRankingData := engine.FetchOIRankingData()
+
 	// Build real context (for generating User Prompt)
 	testContext := &decision.Context{
 		CurrentTime:    time.Now().UTC().Format("2006-01-02 15:04:05 UTC"),
@@ -468,6 +478,8 @@ func (s *Server) handleStrategyTestRun(c *gin.Context) {
 		CandidateCoins: candidates,
 		PromptVariant:  req.PromptVariant,
 		MarketDataMap:  marketDataMap,
+		QuantDataMap:   quantDataMap,
+		OIRankingData:  oiRankingData,
 	}
 
 	// Build System Prompt