Fix missing config handling and auto-restart after setup

cmd/qfs/main.go

@@ -2,8 +2,10 @@ package main
 
 import (
 	"context"
+	"errors"
 	"flag"
 	"fmt"
+	"io/fs"
 	"log/slog"
 	"net/http"
 	"os"
@@ -88,7 +90,7 @@ func main() {
 	// Load config for server settings (optional)
 	cfg, err := config.Load(*configPath)
 	if err != nil {
-		if os.IsNotExist(err) {
+		if errors.Is(err, fs.ErrNotExist) {
 			// Use defaults if config file doesn't exist
 			slog.Info("config file not found, using defaults", "path", *configPath)
 			cfg = &config.Config{}

internal/handlers/setup.go

@@ -203,10 +203,11 @@ func (h *SetupHandler) SaveConnection(c *gin.Context) {
 	}
 
 	// Always restart to properly initialize all services with the new connection
+	restartRequired := h.restartSig == nil
 	c.JSON(http.StatusOK, gin.H{
 		"success":          true,
-		"message":          "Settings saved. Please restart the application to apply changes.",
-		"restart_required": true,
+		"message":          "Settings saved.",
+		"restart_required": restartRequired,
 	})
 
 	// Signal restart after response is sent (if restart signal is configured)

web/templates/setup.html

@@ -158,6 +158,16 @@
             }, 1000); // Check every second
         }
 
+        async function requestRestartAndWait() {
+            showStatus('Перезапуск приложения...', 'info');
+            try {
+                await fetch('/api/restart', { method: 'POST' });
+            } catch (e) {
+                // Ignore network errors here: restart may break connection immediately.
+            }
+            checkServerReady();
+        }
+
         document.getElementById('setup-form').addEventListener('submit', async function(e) {
             e.preventDefault();
             showStatus('Сохранение настроек...', 'info');
@@ -176,9 +186,8 @@
 
                     // Check if restart is required
                     if (data.restart_required) {
-                        // In normal mode, restart must be done manually
                         setTimeout(() => {
-                            showStatus('⚠️ Пожалуйста, перезапустите приложение вручную для применения изменений', 'warning');
+                            requestRestartAndWait();
                         }, 2000);
                     } else {
                         // In setup mode, auto-restart is happening