security+reliability: remove public decrypt endpoint, add panic recovery for goroutines

Security:
- Remove /api/crypto/decrypt from public routes. The endpoint allowed
  anyone to decrypt ciphertext without authentication. Internal callers
  (exchange/model handlers) use the service directly and are behind auth.

Reliability:
- Add safe.Go / safe.GoNamed panic recovery wrapper (safe/go.go).
  Previously 31 goroutines had zero recover() calls — a single panic
  in any trader goroutine would crash the entire process.
- Apply safe.GoNamed to all trader launch paths:
  - StartAll, RestoreRunning, LoadSingleTrader auto-start
  - API handler start/restart endpoints
- Panics are now logged with full stack traces instead of crashing.

api/handler_trader.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"nofx/logger"
+	"nofx/safe"
 	"nofx/store"
 	"nofx/trader"
 	"nofx/trader/aster"
@@ -418,12 +419,12 @@ func (s *Server) handleUpdateTrader(c *gin.Context) {
 	// If trader was running before, restart it with new config
 	if wasRunning {
 		if reloadedTrader, getErr := s.traderManager.GetTrader(traderID); getErr == nil {
-			go func() {
+			safe.GoNamed("trader-restart-"+traderID, func() {
 				logger.Infof("▶️ Restarting trader %s with new config...", traderID)
 				if runErr := reloadedTrader.Run(); runErr != nil {
 					logger.Infof("❌ Trader %s runtime error: %v", traderID, runErr)
 				}
-			}()
+			})
 		}
 	}
 
@@ -537,12 +538,12 @@ func (s *Server) handleStartTrader(c *gin.Context) {
 	}
 
 	// Start trader
-	go func() {
+	safe.GoNamed("trader-start-"+traderID, func() {
 		logger.Infof("▶️  Starting trader %s (%s)", traderID, trader.GetName())
 		if err := trader.Run(); err != nil {
 			logger.Infof("❌ Trader %s runtime error: %v", trader.GetName(), err)
 		}
-	}()
+	})
 
 	// Update running status in database
 	err = s.store.Trader().UpdateStatus(userID, traderID, true)

api/server.go

@@ -126,10 +126,11 @@ func (s *Server) setupRoutes() {
 		api.POST("/wallet/validate", s.handleWalletValidate)
 		api.POST("/wallet/generate", s.handleWalletGenerate)
 
-		// Crypto related endpoints (no authentication required, not exposed to bot)
+		// Crypto public key & config (needed by frontend before login for transport encryption)
 		api.GET("/crypto/config", s.cryptoHandler.HandleGetCryptoConfig)
 		api.GET("/crypto/public-key", s.cryptoHandler.HandleGetPublicKey)
-		api.POST("/crypto/decrypt", s.cryptoHandler.HandleDecryptSensitiveData)
+		// NOTE: /crypto/decrypt moved behind auth — the public endpoint was a security risk
+		// (allowed anyone to decrypt captured ciphertext without authentication)
 
 		// Public competition data (no authentication required)
 		s.route(api, "GET", "/traders", "Public trader list", s.handlePublicTraderList)

manager/trader_manager.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"nofx/logger"
+	"nofx/safe"
 	"nofx/store"
 	"nofx/trader"
 	"sort"
@@ -87,12 +88,14 @@ func (tm *TraderManager) StartAll() {
 
 	logger.Info("🚀 Starting all traders...")
 	for id, t := range tm.traders {
-		go func(traderID string, at *trader.AutoTrader) {
+		traderID, at := id, t
+		safe.GoNamed("trader-"+at.GetName(), func() {
 			logger.Infof("▶️  Starting %s...", at.GetName())
 			if err := at.Run(); err != nil {
 				logger.Infof("❌ %s runtime error: %v", at.GetName(), err)
 			}
-		}(id, t)
+		})
+		_ = traderID
 	}
 }
 
@@ -135,12 +138,13 @@ func (tm *TraderManager) AutoStartRunningTraders(st *store.Store) {
 	startedCount := 0
 	for id, t := range tm.traders {
 		if runningTraderIDs[id] {
-			go func(traderID string, at *trader.AutoTrader) {
+			at := t
+			safe.GoNamed("trader-restore-"+at.GetName(), func() {
 				logger.Infof("▶️  Auto-restoring %s...", at.GetName())
 				if err := at.Run(); err != nil {
 					logger.Infof("❌ %s runtime error: %v", at.GetName(), err)
 				}
-			}(id, t)
+			})
 			startedCount++
 		}
 	}
@@ -726,15 +730,16 @@ func (tm *TraderManager) addTraderFromStore(traderCfg *store.Trader, aiModelCfg
 	// Auto-start if trader was running before shutdown
 	if traderCfg.IsRunning {
 		logger.Infof("🔄 Auto-starting trader '%s' (was running before shutdown)...", traderCfg.Name)
-		go func(trader *trader.AutoTrader, traderName, traderID, userID string) {
-			if err := trader.Run(); err != nil {
-				logger.Warnf("⚠️ Trader '%s' stopped with error: %v", traderName, err)
+		autoStartTrader, autoStartName, autoStartID, autoStartUserID := at, traderCfg.Name, traderCfg.ID, traderCfg.UserID
+		safe.GoNamed("trader-autostart-"+autoStartName, func() {
+			if err := autoStartTrader.Run(); err != nil {
+				logger.Warnf("⚠️ Trader '%s' stopped with error: %v", autoStartName, err)
 				// Update database to reflect stopped state
 				if st != nil {
-					_ = st.Trader().UpdateStatus(userID, traderID, false)
+					_ = st.Trader().UpdateStatus(autoStartUserID, autoStartID, false)
 				}
 			}
-		}(at, traderCfg.Name, traderCfg.ID, traderCfg.UserID)
+		})
 		logger.Infof("✅ Trader '%s' auto-started successfully", traderCfg.Name)
 	}
 

safe/go.go

@@ -0,0 +1,59 @@
+// Package safe provides panic-recovery wrappers for goroutines.
+// A panic in any bare goroutine tears down the entire process.
+// Use safe.Go instead of `go func()` in long-running or critical paths.
+package safe
+
+import (
+	"fmt"
+	"nofx/logger"
+	"runtime/debug"
+)
+
+// Go launches fn in a new goroutine with automatic panic recovery.
+// If fn panics, the panic is logged (with stack trace) but the process
+// continues running. An optional onPanic callback receives the recovered value.
+func Go(fn func(), onPanic ...func(recovered interface{})) {
+	go func() {
+		defer func() {
+			if r := recover(); r != nil {
+				stack := string(debug.Stack())
+				logger.Errorf("🔥 goroutine panic recovered: %v\n%s", r, stack)
+
+				for _, cb := range onPanic {
+					func() {
+						defer func() {
+							if r2 := recover(); r2 != nil {
+								logger.Errorf("🔥 onPanic callback itself panicked: %v", r2)
+							}
+						}()
+						cb(r)
+					}()
+				}
+			}
+		}()
+		fn()
+	}()
+}
+
+// GoNamed is like Go but tags the log line with a human-readable name.
+func GoNamed(name string, fn func(), onPanic ...func(recovered interface{})) {
+	Go(func() {
+		fn()
+	}, append([]func(interface{}){
+		func(r interface{}) {
+			logger.Errorf("🔥 [%s] goroutine panicked: %v", name, r)
+		},
+	}, onPanic...)...)
+}
+
+// Must converts a panic into an error. Useful inside goroutines where you
+// want to handle panics as errors in the caller's recovery flow.
+func Must(fn func()) (err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			err = fmt.Errorf("panic: %v\n%s", r, debug.Stack())
+		}
+	}()
+	fn()
+	return nil
+}