feat(ui): toggle httpLog per-forward in add/edit wizard

Adds an HTTP-log enable toggle to the wizard's confirmation step so
users can flip httpLog on a forward without editing YAML by hand.

Behaviour:
- 'h' on the confirmation step toggles HTTPLog when not focused on
  the alias text input. When focus is on alias, 'h' is treated as
  text so users can still type aliases like 'host' or 'http-proxy'.
- The confirmation summary shows '[x] enabled' or '[ ] disabled'.
- New forwards: toggle on -> &HTTPLogSpec{Enabled: true}; off -> nil.
- Edit mode: pre-populates the toggle from the existing forward and
  preserves any advanced HTTPLog fields the user had configured in
  YAML (logFile, includeHeaders, maxBodySize, filterPath) by copying
  the original spec on save. Toggling off discards the advanced
  fields (consistent with 'absent in YAML = disabled').

State changes:
- ForwardStatus gains *config.HTTPLogSpec so the wizard can see the
  full original spec on edit.
- AddWizardState gains httpLog bool + httpLogOriginal *HTTPLogSpec.

Three new tests:
- TestHandleAddWizardKeys_HToggleHTTPLog
- TestHandleAddWizardKeys_HOnAliasFocusIsTextInput
- TestEditPrefill_PreservesHTTPLog

internal/ui/wizard_state.go

@@ -3,6 +3,7 @@ package ui
 import (
 	"strings"
 
+	"github.com/lukaszraczylo/kportal/internal/config"
 	"github.com/lukaszraczylo/kportal/internal/k8s"
 )
 
@@ -110,6 +111,7 @@ func (r ResourceType) Description() string {
 // AddWizardState maintains the state for the add port forward wizard
 type AddWizardState struct {
 	error                error
+	httpLogOriginal      *config.HTTPLogSpec
 	resourceValue        string
 	originalID           string
 	portCheckMsg         string
@@ -119,16 +121,16 @@ type AddWizardState struct {
 	selector             string
 	selectedContext      string
 	selectedNamespace    string
-	pods                 []k8s.PodInfo
-	contexts             []string
+	services             []k8s.ServiceInfo
 	detectedPorts        []k8s.PortInfo
 	matchingPods         []k8s.PodInfo
-	services             []k8s.ServiceInfo
+	contexts             []string
 	namespaces           []string
-	scrollOffset         int
+	pods                 []k8s.PodInfo
+	localPort            int
 	selectedResourceType ResourceType
 	step                 AddWizardStep
-	localPort            int
+	scrollOffset         int
 	cursor               int
 	remotePort           int
 	inputMode            InputMode
@@ -136,6 +138,7 @@ type AddWizardState struct {
 	portAvailable        bool
 	isEditing            bool
 	loading              bool
+	httpLog              bool
 }
 
 // newAddWizardState creates a new add wizard state initialized to the first step