Tooltip hint, loading bar, edit shortcut, export/import .lazy

- Keterangan tombol saat hover: baris hint di footer window dan di dalam dialog
  (bukan popup: overlay Fyne menelan klik pertama, tombol jadi perlu 2x klik)
- Dialog proses sekarang pakai progress bar berjalan (bukan spinner diam)
- Tombol edit per shortcut: ganti binary/URL, ikon (file/online), nama, kategori,
  dan lokasi; berkas .desktop + salinan Desktop ditulis ulang, berkas lama dibuang,
  jenis aplikasi dideteksi ulang, binary lama dihapus kalau nama berubah
- Export/Import daftar shortcut ke berkas SQLite .lazy (driver murni Go modernc),
  skema + meta format versi, impor tidak menimpa shortcut yang sudah ada
- Tes: detect kind, edit (rename/ganti binary/ikon/target), db roundtrip, merge impor,
  tooltip (hint muncul/hilang + klik tetap sampai ke tombol), semua paket hijau
- README: bagian backup + hint tombol

internal/db/db_test.go

@@ -0,0 +1,111 @@
+package db
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"lazyrun/internal/store"
+)
+
+func sampleItems() []store.Shortcut {
+	return []store.Shortcut{
+		{
+			Slug:        "winbox",
+			Name:        "Winbox",
+			Type:        store.TypeExecutable,
+			Kind:        "windows",
+			ExecArgs:    []string{"/usr/bin/wine", "/home/u/.local/bin/winbox"},
+			Categories:  "Network;",
+			BinaryPath:  "/home/u/.local/bin/winbox",
+			IconPath:    "/home/u/.local/share/icons/winbox.png",
+			IconSource:  "search:winbox",
+			DesktopPath: "/home/u/.local/share/applications/winbox.desktop",
+			Targets:     store.Targets{Menu: true, Desktop: true},
+			InstalledAt: time.Date(2026, 10, 13, 10, 0, 0, 0, time.UTC),
+		},
+		{
+			Slug:            "whatsapp-web",
+			Name:            "WhatsApp Web",
+			Type:            store.TypeWebApp,
+			Kind:            "pwa",
+			URL:             "https://web.whatsapp.com",
+			Browser:         "flatpak run org.chromium.Chromium",
+			ExecArgs:        []string{"flatpak", "run", "org.chromium.Chromium", "--app=https://web.whatsapp.com"},
+			Categories:      "Network;WebBrowser;",
+			DesktopPath:     "/home/u/.local/share/applications/whatsapp-web.desktop",
+			DesktopCopyPath: "/home/u/Desktop/whatsapp-web.desktop",
+			Targets:         store.Targets{Menu: true},
+			InstalledAt:     time.Date(2026, 10, 13, 10, 5, 0, 0, time.UTC),
+		},
+	}
+}
+
+func TestExportImportRoundtrip(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "db.lazy")
+	items := sampleItems()
+
+	if err := Export(path, "1.2.0", items); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := os.Stat(path); err != nil {
+		t.Fatalf("berkas ekspor tidak ada: %v", err)
+	}
+
+	got, err := Import(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(got) != len(items) {
+		t.Fatalf("impor %d item, mau %d", len(got), len(items))
+	}
+
+	// urutan hasil impor berdasarkan nama: WhatsApp Web lalu Winbox
+	web, exe := got[0], got[1]
+	if web.Slug != "whatsapp-web" || web.URL != "https://web.whatsapp.com" || !web.Targets.Menu || web.Targets.Desktop {
+		t.Errorf("data webapp tidak utuh: %+v", web)
+	}
+	if exe.Slug != "winbox" || exe.Kind != "windows" || len(exe.ExecArgs) != 2 || exe.ExecArgs[0] != "/usr/bin/wine" {
+		t.Errorf("data executable tidak utuh: %+v", exe)
+	}
+	if exe.Categories != "Network;" || !exe.Targets.Desktop {
+		t.Errorf("kategori/target hilang: %+v", exe)
+	}
+	if !exe.InstalledAt.Equal(items[0].InstalledAt) {
+		t.Errorf("installed_at berubah: %v", exe.InstalledAt)
+	}
+}
+
+func TestExportOverwritesOldFile(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "db.lazy")
+	if err := os.WriteFile(path, []byte("bukan sqlite"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	if err := Export(path, "1.2.0", sampleItems()[:1]); err != nil {
+		t.Fatal(err)
+	}
+	items, err := Import(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(items) != 1 {
+		t.Errorf("isi setelah timpa: %d item", len(items))
+	}
+}
+
+func TestImportRejectsForeignFile(t *testing.T) {
+	dir := t.TempDir()
+
+	plain := filepath.Join(dir, "catatan.lazy")
+	if err := os.WriteFile(plain, []byte("halo dunia"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := Import(plain); err == nil {
+		t.Error("berkas bukan SQLite harus ditolak")
+	}
+
+	if _, err := Import(filepath.Join(dir, "tidak-ada.lazy")); err == nil {
+		t.Error("berkas tidak ada harus error")
+	}
+}