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

.env

@@ -97,15 +97,15 @@ TAKE_PROFIT_1_PERCENT=0.7
 
 # Take Profit 1 Size: What % of position to close at TP1
 # Example: 50 = close 50% of position
-TAKE_PROFIT_1_SIZE_PERCENT=50
+TAKE_PROFIT_1_SIZE_PERCENT=75
 
 # Take Profit 2: Close remaining 50% at this profit level
 # Example: +1.5% on 10x = +15% account gain
-TAKE_PROFIT_2_PERCENT=1.5
+TAKE_PROFIT_2_PERCENT=1.1
 
 # Take Profit 2 Size: What % of remaining position to close at TP2
 # Example: 100 = close all remaining position
-TAKE_PROFIT_2_SIZE_PERCENT=50
+TAKE_PROFIT_2_SIZE_PERCENT=80
 
 # Emergency Stop: Hard stop if this level is breached
 # Example: -2.0% on 10x = -20% account loss (rare but protects from flash crashes)
@@ -113,13 +113,13 @@ EMERGENCY_STOP_PERCENT=-2
 
 # Dynamic stop-loss adjustments
 # Move SL to breakeven when profit reaches this level
-BREAKEVEN_TRIGGER_PERCENT=0.7
+BREAKEVEN_TRIGGER_PERCENT=0.3
 
 # Lock in profit when price reaches this level
-PROFIT_LOCK_TRIGGER_PERCENT=1.2
+PROFIT_LOCK_TRIGGER_PERCENT=1
 
 # How much profit to lock (move SL to this profit level)
-PROFIT_LOCK_PERCENT=0.2
+PROFIT_LOCK_PERCENT=0.6
 
 # Risk limits
 # Stop trading if daily loss exceeds this amount (USD)
@@ -348,3 +348,7 @@ NEW_RELIC_LICENSE_KEY=
 # - v4/QUICKREF_PHASE2.md - Quick reference
 # - TRADING_BOT_V4_MANUAL.md - Complete manual
 # - PHASE_2_COMPLETE_REPORT.md - Feature summary
+
+USE_TRAILING_STOP=true
+TRAILING_STOP_PERCENT=0.3
+TRAILING_STOP_ACTIVATION=0.5