fix: window minimum, stock spacing layout, sidebar width floor

Part A stages 1-3 of the GUI layout cleanup plan:

- Stage 1 (F1-F3): delete settingsControlWidth's redundant wrapper (the
  Border centre slot already stretches controls), truncate the config
  path label, and name the default window size so it can be asserted
  against. Settings no longer widens the window past what it asks for.
- Stage 2 (F4-F5): drop compactVBoxLayout for the stock
  layout.NewCustomPaddedVBoxLayout and a single derived rowOverlap()
  spacing, replacing three hand-tuned spacing constants.
- Stage 3 (F7): delete the inert 400px sidebar width floor; the Border
  left slot already renders it at content MinSize.

See docs/PLAN-gui-layout.md.

src/ui/settings_view.go

@@ -18,6 +18,7 @@ import (
 	"fyne.io/fyne/v2/canvas"
 	"fyne.io/fyne/v2/container"
 	"fyne.io/fyne/v2/dialog"
+	"fyne.io/fyne/v2/layout"
 	fynestorage "fyne.io/fyne/v2/storage"
 	"fyne.io/fyne/v2/theme"
 	"fyne.io/fyne/v2/widget"
@@ -27,14 +28,8 @@ import (
 // overlap policy") in full; the captions truncate, so a narrower width would
 // clip it. All rows share this width so their value controls stay aligned.
 const settingsLabelWidth float32 = 180
-const settingsControlWidth float32 = 330
 const projectRepositoryURL = "https://gitea.mixdep.ru/mix/gosentry"
 
-// settingsRowSpacing is the (negative) gap between rows of the settings form,
-// overlapping each control's built-in vertical padding so the column is tighter
-// and more compact, matching the condensed job details panel.
-const settingsRowSpacing float32 = -6
-
 func settingsView(w fyne.Window, svc *app.Service) fyne.CanvasObject {
 	store := svc.Store()
 	// updateSaveState compares the form to the saved config and enables Save only
@@ -245,13 +240,13 @@ func settingsView(w fyne.Window, svc *app.Service) fyne.CanvasObject {
 	// the read-only About block. Save spans the full width below both columns.
 	leftColumn := container.NewVBox(
 		settingsSection("Application",
-			settingsRow("Autostart", container.New(minWidthLayout{width: settingsControlWidth}, startOnLogin)),
+			settingsRow("Autostart", startOnLogin),
 			// Autostart status sits on its own row, aligned under the checkbox via an
 			// empty caption, so the Application section fits in a half-width column.
 			settingsRow("", autostartStatus),
-			settingsRow("Tray", container.New(minWidthLayout{width: settingsControlWidth}, minimizeToTray)),
-			settingsRow("Notifications", container.New(minWidthLayout{width: settingsControlWidth}, notifications)),
-			settingsRow("Theme", container.New(minWidthLayout{width: settingsControlWidth}, themeSelect)),
+			settingsRow("Tray", minimizeToTray),
+			settingsRow("Notifications", notifications),
+			settingsRow("Theme", themeSelect),
 		),
 		widget.NewSeparator(),
 		// Queue holds the execution mode and overlap policy comboboxes. Like
@@ -259,18 +254,22 @@ func settingsView(w fyne.Window, svc *app.Service) fyne.CanvasObject {
 		// layout) so the comboboxes keep a visible gap between them.
 		container.NewVBox(
 			widget.NewLabelWithStyle("Queue", fyne.TextAlignLeading, fyne.TextStyle{Bold: true}),
-			settingsRow("Execution mode", container.New(minWidthLayout{width: settingsControlWidth}, executionModeSelect)),
-			settingsRow("Default overlap policy", container.New(minWidthLayout{width: settingsControlWidth}, overlapPolicySelect)),
-			settingsRow("Default timeout (s)", container.New(minWidthLayout{width: settingsControlWidth}, defaultTimeout)),
+			settingsRow("Execution mode", executionModeSelect),
+			settingsRow("Default overlap policy", overlapPolicySelect),
+			settingsRow("Default timeout (s)", defaultTimeout),
 		),
 	)
+	// Truncating keeps a long config path from forcing the Settings tab's
+	// minimum width to track the path length instead of the layout itself.
+	configPathLabel := widget.NewLabel(store.Paths.ConfigPath)
+	configPathLabel.Truncation = fyne.TextTruncateClip
 	rightColumn := container.NewVBox(
 		// Storage holds editable entry fields. It uses the default VBox spacing
 		// (not the condensed section layout) so the entry boxes keep a visible
 		// gap between them instead of merging into one block.
 		container.NewVBox(
 			widget.NewLabelWithStyle("Storage", fyne.TextAlignLeading, fyne.TextStyle{Bold: true}),
-			settingsRow("Config JSON", widget.NewLabel(store.Paths.ConfigPath)),
+			settingsRow("Config JSON", configPathLabel),
 			settingsRow("Jobs file", container.NewBorder(nil, nil, nil, jobsFileBrowse, jobsFile)),
 			// Browse stays rightmost so it lines up with the Jobs file row
 			// above it; Open sits between it and the path it opens.
@@ -313,14 +312,14 @@ func settingsView(w fyne.Window, svc *app.Service) fyne.CanvasObject {
 }
 
 // settingsSection groups a bold header above its rows using the tight
-// settingsRowSpacing so a block of label rows reads as one compact unit. The
+// rowOverlap spacing so a block of label rows reads as one compact unit. The
 // caller keeps separators and entry-heavy sections in the surrounding VBox so
 // they retain the theme's normal spacing.
 func settingsSection(title string, rows ...fyne.CanvasObject) fyne.CanvasObject {
 	children := make([]fyne.CanvasObject, 0, len(rows)+1)
 	children = append(children, widget.NewLabelWithStyle(title, fyne.TextAlignLeading, fyne.TextStyle{Bold: true}))
 	children = append(children, rows...)
-	return container.New(compactVBoxLayout{spacing: settingsRowSpacing}, children...)
+	return container.New(layout.NewCustomPaddedVBoxLayout(rowOverlap()), children...)
 }
 
 func fyneVersion() string {