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

config/trading.ts

@@ -26,6 +26,11 @@ export interface TradingConfig {
   profitLockTriggerPercent: number // When to lock in profit
   profitLockPercent: number // How much profit to lock
   
+  // Trailing stop for runner (after TP2)
+  useTrailingStop: boolean // Enable trailing stop for remaining position
+  trailingStopPercent: number // Trail by this % below peak
+  trailingStopActivation: number // Activate when runner profits exceed this %
+  
   // DEX specific
   priceCheckIntervalMs: number // How often to check prices
   slippageTolerance: number // Max acceptable slippage (%)
@@ -70,10 +75,15 @@ export const DEFAULT_TRADING_CONFIG: TradingConfig = {
   hardStopPercent: -2.5, // Hard stop (TRIGGER_MARKET)
   
   // Dynamic adjustments
-  breakEvenTriggerPercent: 0.4, // Move SL to breakeven at +0.4%
+  breakEvenTriggerPercent: 0.4, // Move SL to this profit level after TP1 hits
   profitLockTriggerPercent: 1.0, // Lock profit at +1.0%
   profitLockPercent: 0.4, // Lock +0.4% profit
   
+  // Trailing stop for runner (after TP2)
+  useTrailingStop: true, // Enable trailing stop for remaining position after TP2
+  trailingStopPercent: 0.3, // Trail by 0.3% below peak price
+  trailingStopActivation: 0.5, // Activate trailing when runner is +0.5% in profit
+  
   // DEX settings
   priceCheckIntervalMs: 2000, // Check every 2 seconds
   slippageTolerance: 1.0, // 1% max slippage on market orders
@@ -86,8 +96,8 @@ export const DEFAULT_TRADING_CONFIG: TradingConfig = {
   // Execution
   useMarketOrders: true, // Use market orders for reliable fills
   confirmationTimeout: 30000, // 30 seconds max wait
-  takeProfit1SizePercent: 75,
-  takeProfit2SizePercent: 100,
+  takeProfit1SizePercent: 75, // Close 75% at TP1 to lock in profit
+  takeProfit2SizePercent: 100, // Close remaining 25% at TP2
 }
 
 // Supported markets on Drift Protocol
@@ -200,6 +210,24 @@ export function getConfigFromEnv(): Partial<TradingConfig> {
     takeProfit2SizePercent: process.env.TAKE_PROFIT_2_SIZE_PERCENT
       ? parseFloat(process.env.TAKE_PROFIT_2_SIZE_PERCENT)
       : undefined,
+    breakEvenTriggerPercent: process.env.BREAKEVEN_TRIGGER_PERCENT
+      ? parseFloat(process.env.BREAKEVEN_TRIGGER_PERCENT)
+      : undefined,
+    profitLockTriggerPercent: process.env.PROFIT_LOCK_TRIGGER_PERCENT
+      ? parseFloat(process.env.PROFIT_LOCK_TRIGGER_PERCENT)
+      : undefined,
+    profitLockPercent: process.env.PROFIT_LOCK_PERCENT
+      ? parseFloat(process.env.PROFIT_LOCK_PERCENT)
+      : undefined,
+    useTrailingStop: process.env.USE_TRAILING_STOP
+      ? process.env.USE_TRAILING_STOP === 'true'
+      : undefined,
+    trailingStopPercent: process.env.TRAILING_STOP_PERCENT
+      ? parseFloat(process.env.TRAILING_STOP_PERCENT)
+      : undefined,
+    trailingStopActivation: process.env.TRAILING_STOP_ACTIVATION
+      ? parseFloat(process.env.TRAILING_STOP_ACTIVATION)
+      : undefined,
     maxDailyDrawdown: process.env.MAX_DAILY_DRAWDOWN 
       ? parseFloat(process.env.MAX_DAILY_DRAWDOWN) 
       : undefined,