Add configurable minimum quality score setting

- Added minQualityScore to TradingConfig (default: 60)
- Updated settings UI with slider control (0-100, step 5)
- Updated check-risk endpoint to use config value
- Made scoreSignalQuality function accept minScore parameter
- Updated API to read/write MIN_QUALITY_SCORE env variable
- Allows users to adjust quality threshold from settings page

app/api/trading/check-risk/route.ts

@@ -153,7 +153,8 @@ export async function POST(request: NextRequest): Promise<NextResponse<RiskCheck
         rsi: body.rsi || 0,
         volumeRatio: body.volumeRatio || 0,
         pricePosition: body.pricePosition || 0,
-        direction: body.direction
+        direction: body.direction,
+        minScore: config.minQualityScore // Use config value
       })
       
       if (!qualityScore.passed) {
@@ -229,6 +230,7 @@ function scoreSignalQuality(params: {
   volumeRatio: number
   pricePosition: number
   direction: 'long' | 'short'
+  minScore?: number // Configurable minimum score threshold
 }): SignalQualityResult {
   let score = 50 // Base score
   const reasons: string[] = []
@@ -307,7 +309,7 @@ function scoreSignalQuality(params: {
     }
   }
 
-  const minScore = 60 // Require 60+ to pass
+  const minScore = params.minScore ?? 60 // Use config value or default to 60
   return {
     passed: score >= minScore,
     score,