Add full custom timeframe selection support

CUSTOM TIMEFRAME FEATURES:
- Superior screenshot API now accepts 'timeframes' array parameter
- Automatically detects custom vs preset timeframe selections
- Maintains superior parallel capture for ANY manual selection
- Full backwards compatibility with existing preset system

API USAGE:
POST /api/superior-screenshot
{
  "timeframes": ["5m", "1h", "1D"],  // Your exact selection
  "symbol": "SOLUSD",
  "layouts": ["ai", "diy"]
}

TESTING TOOLS:
- test-custom-timeframes.js: Logic demonstration
- test-custom-api-practical.js: Real API testing scenarios

ANSWER: YES - Any manual timeframe selection is fully respected!
Whether 1 timeframe or 10, preset or custom - all use parallel capture.

app/api/superior-screenshot/route.js

@@ -12,7 +12,8 @@ export async function POST(request) {
       symbol: body.symbol || 'SOLUSD',
       preset: body.preset || 'scalp',
       layouts: body.layouts || ['ai', 'diy'],
-      analyze: body.analyze === true
+      analyze: body.analyze === true,
+      customTimeframes: body.timeframes // Support for custom timeframe arrays
     }
 
     console.log('📋 Superior Config:', config)
@@ -45,8 +46,21 @@ export async function POST(request) {
       ]
     }
 
-    // Get timeframes for the selected preset
-    const selectedTimeframes = TRADING_PRESETS[config.preset] || TRADING_PRESETS['scalp']
+    // Get timeframes for the selected preset or use custom timeframes
+    let selectedTimeframes
+    
+    if (config.customTimeframes && Array.isArray(config.customTimeframes)) {
+      // Custom timeframes provided - convert to our format
+      selectedTimeframes = config.customTimeframes.map(tf => ({
+        name: tf,
+        tv: tf
+      }))
+      console.log(`🎯 Using CUSTOM timeframes: [${config.customTimeframes.join(', ')}]`)
+    } else {
+      // Use preset timeframes
+      selectedTimeframes = TRADING_PRESETS[config.preset] || TRADING_PRESETS['scalp']
+      console.log(`🎯 Using ${config.preset.toUpperCase()} preset: [${selectedTimeframes.map(tf => tf.name).join(', ')}]`)
+    }
 
     // For single timeframe compatibility
     if (body.timeframe) {
@@ -156,7 +170,8 @@ export async function POST(request) {
       success: true,
       mode: 'parallel',
       symbol: config.symbol,
-      preset: config.preset,
+      preset: config.customTimeframes ? 'custom' : config.preset,
+      customTimeframes: config.customTimeframes || null,
       duration: duration,
       totalScreenshots: totalScreenshots,
       successfulTimeframes: successful.length,
@@ -186,15 +201,24 @@ export async function GET() {
       'scalp': '3 timeframes (5m, 15m, 30m) - Scalping strategy',
       'day-trading': '2 timeframes (1h, 2h) - Day trading strategy', 
       'swing-trading': '2 timeframes (4h, 1D) - Swing trading strategy',
-      'extended': '9 timeframes (1m-1D) - Comprehensive analysis'
+      'extended': '9 timeframes (1m-1D) - Comprehensive analysis',
+      'custom': 'Any timeframes you specify in the timeframes array'
+    },
+    parameters: {
+      symbol: 'Trading symbol (default: SOLUSD)',
+      preset: 'Trading preset (scalp/day-trading/swing-trading/extended)',
+      timeframes: 'Array of custom timeframes (overrides preset) - e.g. ["5m", "1h", "1D"]',
+      layouts: 'Screenshot layouts (default: ["ai", "diy"])',
+      analyze: 'Whether to run AI analysis (default: false)'
     },
     features: [
       'Parallel multi-timeframe capture',
       'Intelligent preset detection',
+      'Custom timeframe arrays fully supported',
       'Single timeframe compatibility',
       'Proven efficiency (100% success rate)',
       'API-managed browser sessions',
-      'No hardcoded 7-timeframe limitation'
+      'Respects ANY manual timeframe selection'
     ]
   })
 }