feat: unify NofxOS data provider and fix language consistency

- Add unified NofxOS API key configuration in IndicatorEditor
- Add language field to StrategyConfig for consistent prompt generation
- Auto-update prompt sections when interface language changes
- Remove scattered URL inputs from CoinSourceEditor and IndicatorEditor
- Create nofxos provider package with formatted data output
- Update kernel engine to use config-based language setting

api/server.go

@@ -406,7 +406,7 @@ type CreateTraderRequest struct {
 	CustomPrompt         string `json:"custom_prompt"`
 	OverrideBasePrompt   bool   `json:"override_base_prompt"`
 	SystemPromptTemplate string `json:"system_prompt_template"` // System prompt template name
-	UseCoinPool          bool   `json:"use_coin_pool"`
+	UseAI500             bool   `json:"use_ai500"`
 	UseOITop             bool   `json:"use_oi_top"`
 }
 
@@ -666,7 +666,7 @@ func (s *Server) handleCreateTrader(c *gin.Context) {
 		BTCETHLeverage:       btcEthLeverage,
 		AltcoinLeverage:      altcoinLeverage,
 		TradingSymbols:       req.TradingSymbols,
-		UseCoinPool:          req.UseCoinPool,
+		UseAI500:             req.UseAI500,
 		UseOITop:             req.UseOITop,
 		CustomPrompt:         req.CustomPrompt,
 		OverrideBasePrompt:   req.OverrideBasePrompt,
@@ -2049,7 +2049,7 @@ func (s *Server) handleGetTraderConfig(c *gin.Context) {
 		"custom_prompt":         traderConfig.CustomPrompt,
 		"override_base_prompt":  traderConfig.OverrideBasePrompt,
 		"is_cross_margin":       traderConfig.IsCrossMargin,
-		"use_coin_pool":         traderConfig.UseCoinPool,
+		"use_ai500":             traderConfig.UseAI500,
 		"use_oi_top":            traderConfig.UseOITop,
 		"is_running":            isRunning,
 	}