Add trailing stop feature for runner position + fix settings persistence

- Implemented trailing stop logic in Position Manager for remaining position after TP2
- Added new ActiveTrade fields: tp2Hit, trailingStopActive, peakPrice
- New config settings: useTrailingStop, trailingStopPercent, trailingStopActivation
- Added trailing stop UI section in settings page with explanations
- Fixed env file parsing regex to support numbers in variable names (A-Z0-9_)
- Settings now persist correctly across container restarts
- Added back arrow navigation on settings page
- Updated all API endpoints and test files with new fields
- Trailing stop activates when runner reaches configured profit level
- SL trails below peak price by configurable percentage

app/api/settings/route.ts

@@ -19,7 +19,7 @@ function parseEnvFile(): Record<string, string> {
       // Skip comments and empty lines
       if (line.trim().startsWith('#') || !line.trim()) return
       
-      const match = line.match(/^([A-Z_]+)=(.*)$/)
+      const match = line.match(/^([A-Z0-9_]+)=(.*)$/)
       if (match) {
         env[match[1]] = match[2]
       }
@@ -73,6 +73,9 @@ export async function GET() {
       BREAKEVEN_TRIGGER_PERCENT: parseFloat(env.BREAKEVEN_TRIGGER_PERCENT || '0.4'),
       PROFIT_LOCK_TRIGGER_PERCENT: parseFloat(env.PROFIT_LOCK_TRIGGER_PERCENT || '1.0'),
       PROFIT_LOCK_PERCENT: parseFloat(env.PROFIT_LOCK_PERCENT || '0.4'),
+      USE_TRAILING_STOP: env.USE_TRAILING_STOP === 'true' || env.USE_TRAILING_STOP === undefined,
+      TRAILING_STOP_PERCENT: parseFloat(env.TRAILING_STOP_PERCENT || '0.3'),
+      TRAILING_STOP_ACTIVATION: parseFloat(env.TRAILING_STOP_ACTIVATION || '0.5'),
       MAX_DAILY_DRAWDOWN: parseFloat(env.MAX_DAILY_DRAWDOWN || '-50'),
       MAX_TRADES_PER_HOUR: parseInt(env.MAX_TRADES_PER_HOUR || '6'),
       MIN_TIME_BETWEEN_TRADES: parseInt(env.MIN_TIME_BETWEEN_TRADES || '600'),
@@ -106,6 +109,9 @@ export async function POST(request: NextRequest) {
       BREAKEVEN_TRIGGER_PERCENT: settings.BREAKEVEN_TRIGGER_PERCENT.toString(),
       PROFIT_LOCK_TRIGGER_PERCENT: settings.PROFIT_LOCK_TRIGGER_PERCENT.toString(),
       PROFIT_LOCK_PERCENT: settings.PROFIT_LOCK_PERCENT.toString(),
+      USE_TRAILING_STOP: settings.USE_TRAILING_STOP.toString(),
+      TRAILING_STOP_PERCENT: settings.TRAILING_STOP_PERCENT.toString(),
+      TRAILING_STOP_ACTIVATION: settings.TRAILING_STOP_ACTIVATION.toString(),
       MAX_DAILY_DRAWDOWN: settings.MAX_DAILY_DRAWDOWN.toString(),
       MAX_TRADES_PER_HOUR: settings.MAX_TRADES_PER_HOUR.toString(),
       MIN_TIME_BETWEEN_TRADES: settings.MIN_TIME_BETWEEN_TRADES.toString(),

app/api/trading/execute/route.ts

@@ -198,11 +198,14 @@ export async function POST(request: NextRequest): Promise<NextResponse<ExecuteTr
       emergencyStopPrice,
       currentSize: positionSizeUSD,
       tp1Hit: false,
+      tp2Hit: false,
       slMovedToBreakeven: false,
       slMovedToProfit: false,
+      trailingStopActive: false,
       realizedPnL: 0,
       unrealizedPnL: 0,
       peakPnL: 0,
+      peakPrice: entryPrice,
       priceCheckCount: 0,
       lastPrice: entryPrice,
       lastUpdateTime: Date.now(),

app/api/trading/test-db/route.ts

@@ -170,11 +170,14 @@ export async function POST(request: NextRequest): Promise<NextResponse<TestTrade
       emergencyStopPrice,
       currentSize: positionSizeUSD,
       tp1Hit: false,
+      tp2Hit: false,
       slMovedToBreakeven: false,
       slMovedToProfit: false,
+      trailingStopActive: false,
       realizedPnL: 0,
       unrealizedPnL: 0,
       peakPnL: 0,
+      peakPrice: entryPrice,
       priceCheckCount: 0,
       lastPrice: entryPrice,
       lastUpdateTime: Date.now(),

app/api/trading/test/route.ts

@@ -169,11 +169,14 @@ export async function POST(request: NextRequest): Promise<NextResponse<TestTrade
       emergencyStopPrice,
       currentSize: positionSizeUSD,
       tp1Hit: false,
+      tp2Hit: false,
       slMovedToBreakeven: false,
       slMovedToProfit: false,
+      trailingStopActive: false,
       realizedPnL: 0,
       unrealizedPnL: 0,
       peakPnL: 0,
+      peakPrice: entryPrice,
       priceCheckCount: 0,
       lastPrice: entryPrice,
       lastUpdateTime: Date.now(),