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/icon/install.go

@@ -0,0 +1,82 @@
+// Package icon menyimpan ikon shortcut ke direktori ikon XDG.
+package icon
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"lazyrun/assets"
+	"lazyrun/internal/xdg"
+)
+
+var exts = []string{".png", ".svg", ".jpg", ".jpeg", ".xpm"}
+var nearbyNames = []string{"icon", "logo"}
+
+// Save memasang ikon untuk shortcut dan mengembalikan path absolutnya.
+// Urutan pilihan: ikon dari user, ikon di folder binary, lalu ikon default LazyRun.
+func Save(userIcon, nearbyDir, nearbyBase, slug string) (string, error) {
+	if userIcon != "" {
+		return fromFile(userIcon, slug)
+	}
+	for _, name := range append([]string{nearbyBase}, nearbyNames...) {
+		if name == "" {
+			continue
+		}
+		if p := findNearby(nearbyDir, name); p != "" {
+			return fromFile(p, slug)
+		}
+	}
+	return Default(slug)
+}
+
+// Default memasang ikon bawaan LazyRun.
+func Default(slug string) (string, error) {
+	return SaveBytes(assets.Icon, ".png", slug)
+}
+
+func findNearby(dir, base string) string {
+	base = strings.ToLower(base)
+	for _, ext := range exts {
+		p := filepath.Join(dir, base+ext)
+		if st, err := os.Stat(p); err == nil && !st.IsDir() {
+			return p
+		}
+	}
+	return ""
+}
+
+func fromFile(src, slug string) (string, error) {
+	data, err := os.ReadFile(src)
+	if err != nil {
+		return "", err
+	}
+	ext := strings.ToLower(filepath.Ext(src))
+	// ICO tidak dipakai desktop theme; pakai PNG di dalamnya kalau ada.
+	if ext == ".ico" {
+		png := largestPNGFromICO(data)
+		if png == nil {
+			return "", errors.New("this .ico has no PNG inside it, pick another icon")
+		}
+		return SaveBytes(png, ".png", slug)
+	}
+	return SaveBytes(data, ext, slug)
+}
+
+// SaveBytes menulis data ikon ke direktori ikon XDG.
+func SaveBytes(data []byte, ext, slug string) (string, error) {
+	if ext == "" {
+		ext = ".png"
+	}
+	if err := os.MkdirAll(xdg.IconsDir(), 0o755); err != nil {
+		return "", err
+	}
+	// shortcut: ikon disimpan apa adanya di hicolor/512x512 tanpa resize;
+	// desktop environment men-skalanya sendiri. Tambah resize kalau ikon kecil terlihat pecah.
+	dest := filepath.Join(xdg.IconsDir(), slug+ext)
+	return dest, os.WriteFile(dest, data, 0o644)
+}
+
+// IconBytes adalah ikon default LazyRun.
+func IconBytes() []byte { return assets.Icon }