fix: persist host port and compat mode in config.toml

The host-side port mapping and seccomp compatibility-mode selections
were only used in-memory for docker run args and never written to
config.toml, so a re-run of the installer couldn't recover them as
form defaults (worse, the host port field silently defaulted to the
container's internal port). Add host_port and seccomp_unconfined to
[server] and decode them back via AppConfig.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

internal/tui/model.go

@@ -61,9 +61,11 @@ type ConfigValues struct {
 
 type AppConfig struct {
 	Server struct {
-		Port        int64  `toml:"port"`
-		Timeout     int64  `toml:"timeout_seconds"`
-		Environment string `toml:"environment"`
+		Port              int64  `toml:"port"`
+		HostPort          int64  `toml:"host_port"`
+		Timeout           int64  `toml:"timeout_seconds"`
+		Environment       string `toml:"environment"`
+		SeccompUnconfined bool   `toml:"seccomp_unconfined"`
 	} `toml:"server"`
 	Database struct {
 		Type     string `toml:"type"`
@@ -83,7 +85,8 @@ type AppConfig struct {
 func loadConfig() AppConfig {
 	var config AppConfig
 
-	config.Server.Port = 8081
+	config.Server.Port = containerAppPort
+	config.Server.HostPort = 8081
 	config.Server.Timeout = 30
 	config.Server.Environment = "production"
 
@@ -113,6 +116,11 @@ func InitialModel() Model {
 	s.Spinner = spinner.Dot
 	s.Style = SpinnerStyle
 
+	seccompDefault := "Não"
+	if cfg.Server.SeccompUnconfined {
+		seccompDefault = "Sim"
+	}
+
 	return Model{
 		currentStep: StepCheckDocker,
 		loginForm: NewFormStep("Login no Repositório Docker", []FormField{
@@ -175,7 +183,7 @@ func InitialModel() Model {
 				Id:          "port",
 				Label:       "Porta (host)",
 				Placeholder: "8081",
-				Default:     strconv.FormatInt(cfg.Server.Port, 10),
+				Default:     strconv.FormatInt(cfg.Server.HostPort, 10),
 				Type:        FieldTypeNumber,
 				CharLimit:   4,
 			},
@@ -197,7 +205,7 @@ func InitialModel() Model {
 			{
 				Id:      "seccomp_unconfined",
 				Label:   "Modo Compatibilidade (máquinas antigas)",
-				Default: "Não",
+				Default: seccompDefault,
 				Type:    FieldTypeSelect,
 				Options: []string{"Não", "Sim"},
 			},