Dialog: tombol tutup + Kembali, isi bisa di-scroll, ukuran mengikuti window

- Tombol X di kanan atas tiap dialog + tombol Back di modal pencarian ikon
- Isi dialog dibungkus scroll: Fyne tidak bisa mengecilkan dialog di bawah MinSize
  konten, jadi di layar ber-penskalaan besar tombol bawah tadinya bisa terpotong
- Ukuran dialog dibatasi 90% lebar / 85% tinggi window

internal/ui/dialog_executable.go

@@ -100,7 +100,8 @@ func (ui *app) showExecutableDialog() {
 		widget.NewFormItem(T("field_name"), nameEntry),
 		widget.NewFormItem(T("field_category"), category),
 	)
-	content := container.NewVBox(
+	content := container.NewVScroll(container.NewVBox(
+		closeRow(func() { d.Hide() }),
 		form,
 		widget.NewSeparator(),
 		sectionTitle(T("section_location")),
@@ -110,11 +111,10 @@ func (ui *app) showExecutableDialog() {
 		container.NewHBox(logoBox(newLogo(), 20), spacer(),
 			widget.NewButton(T("cancel"), func() { d.Hide() }),
 			install),
-	)
+	))
 
 	d = dialog.NewCustom(T("new_exec_title"), "", content, ui.win)
-	d.Resize(fyne.NewSize(560, 470))
-	d.Show()
+	showDialog(d, ui.win, 560, 520)
 }
 
 // pickFile membuka file picker dan mengirim path absolut ke onPick.

internal/ui/dialog_icon.go

@@ -49,10 +49,10 @@ func (ui *app) showIconSearch(query string, onPick func(icon.Result, []byte)) {
 
 	entry.OnSubmitted = func(string) { search() }
 	content := container.NewBorder(
-		entry,
+		container.NewVBox(closeRow(func() { d.Hide() }), entry),
 		container.NewBorder(nil, nil, status,
 			container.NewHBox(
-				widget.NewButton(T("cancel"), func() { d.Hide() }),
+				widget.NewButtonWithIcon(T("back"), theme.NavigateBackIcon(), func() { d.Hide() }),
 				widget.NewButtonWithIcon(T("search"), theme.SearchIcon(), search),
 			)),
 		nil, nil,
@@ -60,8 +60,7 @@ func (ui *app) showIconSearch(query string, onPick func(icon.Result, []byte)) {
 	)
 
 	d = dialog.NewCustom(T("icon_search_title"), "", content, ui.win)
-	d.Resize(fyne.NewSize(560, 460))
-	d.Show()
+	showDialog(d, ui.win, 560, 470)
 	search()
 }
 

internal/ui/dialog_webapp.go

@@ -5,7 +5,6 @@ import (
 	"path/filepath"
 	"strings"
 
-	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/container"
 	"fyne.io/fyne/v2/dialog"
 	"fyne.io/fyne/v2/theme"
@@ -106,7 +105,8 @@ func (ui *app) showWebAppDialog() {
 		widget.NewFormItem(T("field_icon"), container.NewBorder(nil, nil, nil,
 			container.NewHBox(onlineIcon, browseIcon), iconLabel)),
 	)
-	content := container.NewVBox(
+	content := container.NewVScroll(container.NewVBox(
+		closeRow(func() { d.Hide() }),
 		form,
 		widget.NewSeparator(),
 		sectionTitle(T("section_location")),
@@ -116,11 +116,10 @@ func (ui *app) showWebAppDialog() {
 		container.NewHBox(logoBox(newLogo(), 20), spacer(),
 			widget.NewButton(T("cancel"), func() { d.Hide() }),
 			install),
-	)
+	))
 
 	d = dialog.NewCustom(T("new_web_title"), "", content, ui.win)
-	d.Resize(fyne.NewSize(560, 470))
-	d.Show()
+	showDialog(d, ui.win, 560, 520)
 }
 
 func browserNames(list []browser.Browser) []string {

internal/ui/style.go

@@ -7,6 +7,7 @@ import (
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/canvas"
 	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/dialog"
 	"fyne.io/fyne/v2/layout"
 	"fyne.io/fyne/v2/storage"
 	"fyne.io/fyne/v2/theme"
@@ -118,5 +119,23 @@ func logoBox(image *canvas.Image, size float32) fyne.CanvasObject {
 	return container.NewGridWrap(fyne.NewSize(size, size), image)
 }
 
+// closeRow menempatkan tombol tutup di kanan atas isi dialog, supaya
+// selalu ada jalan keluar yang terlihat walau tombol bawah terpotong.
+func closeRow(hide func()) fyne.CanvasObject {
+	return container.NewHBox(spacer(), iconButton(theme.CancelIcon(), hide))
+}
+
+// showDialog menampilkan dialog dengan ukuran yang disesuaikan ke window.
+// Isi dialog sebaiknya dibungkus VScroll supaya MinSize-nya kecil (Fyne tidak
+// bisa mengecilkan dialog di bawah MinSize konten).
+func showDialog(d *dialog.CustomDialog, win fyne.Window, width, height float32) {
+	size := win.Canvas().Size()
+	d.Resize(fyne.NewSize(
+		fyne.Min(width, size.Width*0.9),
+		fyne.Min(height, size.Height*0.85),
+	))
+	d.Show()
+}
+
 // spacer adalah pengisi ruang kosong.
 func spacer() fyne.CanvasObject { return layout.NewSpacer() }