fix: file type handling on Enter - extensions checked before executable bit

- Reorder Category() to check known extensions (text, config, image,
  pdf, audio, video, archive) before the executable bit check.
  Fixes video/audio/image files with executable bit being opened in
  editor instead of system default application.
- Remove 'executable' from isEditableEntry() - executables are now
  launched via handleExecute() instead of opened in Neovim.
- Add handleExecute() method that runs executable files in the
  terminal via tea.ExecProcess.
- Update handleOpenSelected() to route: text/config -> editor,
  executable -> launch, everything else -> system default (xdg-open).
- Bump version to v0.2.1

internal/ui/model.go

@@ -23,7 +23,7 @@ import (
 	"vcom/internal/theme"
 )
 
-const version = "v0.2.0"
+const version = "v0.2.1"
 
 type modalKind int
 
@@ -51,6 +51,7 @@ const (
 	opEdit
 	opView
 	opArchive
+	opExecute
 )
 
 type pendingOperation struct {
@@ -353,6 +354,9 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		case opView:
 			m.status = "Viewer closed"
 			return m, enableMouseCmd()
+		case opExecute:
+			m.status = "Executable closed"
+			return m, tea.Batch(m.loadPreviewCmd(), enableMouseCmd())
 		}
 
 		leftSelection := selectedName(&m.left)
@@ -1440,10 +1444,14 @@ func (m *Model) handleOpenSelected() (tea.Model, tea.Cmd) {
 		return m, m.loadPreviewCmd()
 	}
 
-	if isEditableEntry(selected) {
+	switch selected.Category() {
+	case "text", "config":
 		return m.handleEdit()
+	case "executable":
+		return m.handleExecute(selected)
+	default:
+		return m.handleOpenExternal()
 	}
-	return m.handleOpenExternal()
 }
 
 func (m *Model) goParent() error {
@@ -1769,6 +1777,16 @@ func (m *Model) handleEdit() (tea.Model, tea.Cmd) {
 	})
 }
 
+func (m *Model) handleExecute(entry vfs.Entry) (tea.Model, tea.Cmd) {
+	m.cleanupImageOverlay()
+	cmd := exec.Command(entry.Path)
+	cmd.Dir = filepath.Dir(entry.Path)
+	m.status = fmt.Sprintf("Executing %s", entry.DisplayName())
+	return m, tea.ExecProcess(cmd, func(err error) tea.Msg {
+		return opMsg{kind: opExecute, sourcePath: entry.Path, err: err}
+	})
+}
+
 func (m *Model) handleMouse(msg tea.MouseMsg) (tea.Model, tea.Cmd) {
 	if m.viewMode {
 		switch {
@@ -4242,7 +4260,7 @@ func paneIndexFromMouse(localY int, height int, pane *BrowserPane) (int, bool) {
 
 func isEditableEntry(entry vfs.Entry) bool {
 	switch entry.Category() {
-	case "text", "config", "executable":
+	case "text", "config":
 		return true
 	default:
 		return false