Add /config trial VPN generation for users (1 day default)

Users get Remnawave subscription via /config or inline button; TRIAL_USER_DAYS and panel lookup by Telegram ID.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/config/config.go

@@ -21,6 +21,7 @@ type Config struct {
 	RemnawaveSubscription      string
 	DatabaseURL                string
 	DefaultUserDays            int
+	TrialUserDays              int
 	DefaultExternalSquadUUID   string
 	DefaultInternalSquadUUIDs  []string
 }
@@ -69,13 +70,20 @@ func Load() (*Config, error) {
 		return nil, fmt.Errorf("DATABASE_URL не задан")
 	}
 
-	days := 30
+	days := 1
 	if v := strings.TrimSpace(os.Getenv("DEFAULT_USER_DAYS")); v != "" {
 		if d, err := strconv.Atoi(v); err == nil && d > 0 {
 			days = d
 		}
 	}
 
+	trialDays := days
+	if v := strings.TrimSpace(os.Getenv("TRIAL_USER_DAYS")); v != "" {
+		if d, err := strconv.Atoi(v); err == nil && d > 0 {
+			trialDays = d
+		}
+	}
+
 	var internalSquads []string
 	if v := strings.TrimSpace(os.Getenv("DEFAULT_INTERNAL_SQUAD_UUIDS")); v != "" {
 		for _, part := range strings.Split(v, ",") {
@@ -97,6 +105,7 @@ func Load() (*Config, error) {
 		RemnawaveSubscription:     subURL,
 		DatabaseURL:               dbURL,
 		DefaultUserDays:           days,
+		TrialUserDays:             trialDays,
 		DefaultExternalSquadUUID:  strings.TrimSpace(os.Getenv("DEFAULT_EXTERNAL_SQUAD_UUID")),
 		DefaultInternalSquadUUIDs: internalSquads,
 	}, nil