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/jobs_view.go

@@ -16,24 +16,12 @@ import (
 
 const allFolders = "All"
 const noFolder = "No folder"
-const minJobsSidebarWidth float32 = 400
 
 // maxJobActivityRows caps the "Selected job activity" panel to the most recent
 // entries. The full per-job history (up to maxJobLogs) remains in the History
 // view; this panel is a quick at-a-glance summary anchored below the output.
 const maxJobActivityRows = 3
 
-// detailRowSpacing is the (negative) gap applied between metadata rows in the
-// details panel. Pulling rows together overlaps the labels' built-in vertical
-// padding, tightening the block so it fits comfortably on 720p screens.
-const detailRowSpacing float32 = -8
-
-// jobRowSpacing is the (negative) gap between the name, metadata, and status
-// lines within each job list row. Like the details panel, it overlaps the
-// labels' built-in vertical padding so each row reads as one compact block and
-// more jobs are visible without scrolling.
-const jobRowSpacing float32 = -8
-
 // newJobsView builds the Jobs tab: list sidebar, details panel, and toolbar.
 // It returns the assembled panel and a refresh function the caller invokes
 // whenever the service state may have changed (e.g., from the event subscriber
@@ -109,8 +97,8 @@ func newJobsView(w fyne.Window, svc *app.Service) (fyne.CanvasObject, func()) {
 	// applyRowMode expresses the current view mode as visibility on the row's
 	// four labels. widget.List caches the row template's MinSize, and
 	// list.Refresh() re-creates the template and recomputes it, so hiding lines
-	// is what actually shrinks the rows: compactVBoxLayout and the border layout
-	// both skip hidden children when measuring.
+	// is what actually shrinks the rows: layout.NewCustomPaddedVBoxLayout and the
+	// border layout both skip hidden children when measuring.
 	applyRowMode := func(inlineStatus, meta, status fyne.CanvasObject) {
 		if listView.IsCompact() {
 			inlineStatus.Show()
@@ -136,7 +124,7 @@ func newJobsView(w fyne.Window, svc *app.Service) (fyne.CanvasObject, func()) {
 			status := widget.NewLabel("status")
 			applyRowMode(inlineStatus, meta, status)
 			nameLine := container.NewBorder(nil, nil, nil, inlineStatus, name)
-			return container.New(compactVBoxLayout{spacing: jobRowSpacing}, nameLine, meta, status)
+			return container.New(layout.NewCustomPaddedVBoxLayout(rowOverlap()), nameLine, meta, status)
 		},
 		func(id widget.ListItemID, item fyne.CanvasObject) {
 			row := item.(*fyne.Container)
@@ -362,7 +350,6 @@ func newJobsView(w fyne.Window, svc *app.Service) (fyne.CanvasObject, func()) {
 	sidebarHeader := container.NewVBox(globalControls, widget.NewSeparator(), filterRow, toolbar)
 	sidebar := container.NewBorder(sidebarHeader, nil, nil, nil, list)
 
-	fixedSidebar := container.New(minWidthLayout{width: minJobsSidebarWidth}, sidebar)
-	panel := container.NewBorder(nil, nil, fixedSidebar, nil, container.NewPadded(dp.container()))
+	panel := container.NewBorder(nil, nil, sidebar, nil, container.NewPadded(dp.container()))
 	return panel, refreshView
 }