LazyRun v1.0.0: shortcut maker untuk executable dan PWA

- Fungsi A: shortcut dari file executable (ELF/AppImage/script)
- Fungsi B: shortcut PWA/URL dengan deteksi browser (native, /opt, Flatpak)
- Checkbox Menu Aplikasi / Desktop, desktop-only pakai NoDisplay=true
- List + uninstall + deteksi shortcut yang file .desktop-nya hilang
- Metadata ~/.config/lazyrun/shortcuts.json, refresh cache XDG/KDE
- AppImage + zsync update info via build.sh

internal/shortcut/desktop.go

@@ -0,0 +1,89 @@
+package shortcut
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"unicode"
+)
+
+// Entry adalah isi file .desktop yang dihasilkan LazyRun.
+type Entry struct {
+	Name       string
+	ExecArgs   []string // argv lengkap; tiap arg di-quote sesuai spec Exec
+	Icon       string   // path absolut atau nama ikon
+	Categories string   // sudah diakhiri ";" atau kosong
+	// NoDisplay menyembunyikan entry dari menu aplikasi. Dipakai kalau user
+	// hanya memilih Desktop: file tetap ada di applications/ sebagai sumber kebenaran.
+	NoDisplay bool
+}
+
+// Render menghasilkan isi file .desktop.
+func (e Entry) Render() string {
+	var b strings.Builder
+	b.WriteString("[Desktop Entry]\n")
+	b.WriteString("Type=Application\n")
+	fmt.Fprintf(&b, "Name=%s\n", escapeValue(e.Name))
+	fmt.Fprintf(&b, "Exec=%s\n", execArgs(e.ExecArgs))
+	if e.Icon != "" {
+		fmt.Fprintf(&b, "Icon=%s\n", escapeValue(e.Icon))
+	}
+	b.WriteString("Terminal=false\n")
+	if e.Categories != "" {
+		fmt.Fprintf(&b, "Categories=%s\n", escapeValue(e.Categories))
+	}
+	if e.NoDisplay {
+		b.WriteString("NoDisplay=true\n")
+	}
+	b.WriteString("Comment=Created by LazyRun\n")
+	return b.String()
+}
+
+// WriteDesktop menulis entry .desktop ke path.
+func WriteDesktop(path string, e Entry) error {
+	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
+		return err
+	}
+	return os.WriteFile(path, []byte(e.Render()), 0o644)
+}
+
+func execArgs(args []string) string {
+	quoted := make([]string, len(args))
+	for i, a := range args {
+		quoted[i] = execQuote(a)
+	}
+	return strings.Join(quoted, " ")
+}
+
+// execQuote mengutip satu argumen sesuai aturan field Exec (spec Desktop Entry).
+func execQuote(s string) string {
+	if s != "" && !strings.ContainsAny(s, " \t\n\"'\\><~|&;$*?#()`") {
+		return s
+	}
+	r := strings.NewReplacer("\\", "\\\\", "\"", "\\\"", "`", "\\`", "$", "\\$", "\n", "\\n")
+	return "\"" + r.Replace(s) + "\""
+}
+
+// escapeValue meng-escape nilai string biasa (Name, Icon, Categories).
+func escapeValue(s string) string {
+	r := strings.NewReplacer("\\", "\\\\", "\n", "\\n", "\r", "\\r", "\t", "\\t")
+	return r.Replace(s)
+}
+
+// slugify membuat nama file yang aman dari nama aplikasi.
+func slugify(name string) string {
+	var b strings.Builder
+	dash := false
+	for _, r := range strings.ToLower(name) {
+		switch {
+		case r >= 'a' && r <= 'z', r >= '0' && r <= '9', unicode.IsLetter(r), unicode.IsDigit(r):
+			b.WriteRune(r)
+			dash = false
+		case b.Len() > 0 && !dash:
+			b.WriteByte('-')
+			dash = true
+		}
+	}
+	return strings.Trim(b.String(), "-")
+}