feat: add retroactive position analysis functionality

New Features:
- 🔍 ANALYZE button to generate AI reasoning for existing positions
- Retroactive AI analysis API endpoint for positions opened outside automation
- Enhanced reasoning display with RETROACTIVE indicator
- Smart position analysis that handles missing stop loss data

- /api/automation/analyze-position endpoint for retroactive analysis
- analyzeExistingPosition() function in automation-v2 UI
- Automatic estimation of stop loss when not visible in position data
- Enhanced AI reasoning panel with retroactive analysis support

- Analyzes entry strategy, risk management, and leverage calculations
- Generates detailed AI reasoning for existing positions
- Shows estimated vs actual stop loss levels
- Calculates risk/reward ratios and leverage estimates
- Displays position status (profitable/underwater) with safety metrics

- RETROACTIVE badge for analyzed existing positions
- Blue 🔍 ANALYZE button in automation controls
- Enhanced reasoning display with position-specific insights
- Comprehensive execution details with estimated vs actual data

Now users can see AI reasoning for any existing position, not just new automation trades!

app/automation-v2/page.js

@@ -260,6 +260,44 @@ export default function AutomationPageV2() {
     }
   }
 
+  const analyzeExistingPosition = async () => {
+    console.log('🔍 Analyzing existing position...')
+    setLoading(true)
+    try {
+      // First get the current position data
+      const positionResponse = await fetch('/api/automation/position-monitor')
+      const positionData = await positionResponse.json()
+      
+      if (positionData.success && positionData.monitor.hasPosition) {
+        // Analyze the existing position
+        const response = await fetch('/api/automation/analyze-position', {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({
+            action: 'analyze_existing_position',
+            positionData: positionData.monitor.position
+          })
+        })
+        
+        const data = await response.json()
+        
+        if (data.success) {
+          console.log('✅ Position analysis generated successfully')
+          fetchStatus() // Refresh to show the analysis
+        } else {
+          console.error('Failed to analyze position:', data.error)
+        }
+      } else {
+        console.log('ℹ️ No position found to analyze')
+        alert('No active position found to analyze')
+      }
+    } catch (error) {
+      console.error('Position analysis error:', error)
+    } finally {
+      setLoading(false)
+    }
+  }
+
   return (
     <div className="space-y-6">
       <div className="grid grid-cols-1 xl:grid-cols-3 gap-6">
@@ -296,6 +334,14 @@ export default function AutomationPageV2() {
                     >
                       🧪 TEST AI
                     </button>
+                    <button
+                      onClick={analyzeExistingPosition}
+                      disabled={loading}
+                      className="px-4 py-3 bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors disabled:opacity-50 font-semibold border-2 border-blue-500"
+                      title="Analyze Current Position - Generate AI reasoning for existing position"
+                    >
+                      🔍 ANALYZE
+                    </button>
                   </>
                 ) : (
                   <button
@@ -572,6 +618,11 @@ export default function AutomationPageV2() {
                       }`}>
                         {status.lastDecision.recommendation || 'HOLD'}
                       </div>
+                      {status.lastDecision.isRetrospective && (
+                        <div className="px-2 py-1 rounded-full text-xs font-bold bg-orange-500/20 text-orange-300 border border-orange-500/30">
+                          📊 RETROACTIVE
+                        </div>
+                      )}
                       <div className="flex items-center space-x-2">
                         <span className="text-gray-400 text-sm">Confidence:</span>
                         <div className={`px-2 py-1 rounded text-sm font-bold ${