feat(cli): add archive command for cross-host data transport (#610)

* feat(cli): add archive command for cross-host data transport
* fix(archive): correct flat-layout path and entry-count wording
* refactor(archive): rename BuildArchive to WriteArchive

browser/chromium/archive_test.go

@@ -0,0 +1,88 @@
+package chromium
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/moond4rk/hackbrowserdata/types"
+)
+
+func TestArchiveSources_ForwardSlashLayout(t *testing.T) {
+	udd := t.TempDir()
+	networkDir := filepath.Join(udd, "Default", "Network")
+	if err := os.MkdirAll(networkDir, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(udd, "Default", "Preferences"), []byte("{}"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(networkDir, "Cookies"), []byte("x"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(udd, "Local State"), []byte("{}"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+
+	b, err := NewBrowser(types.BrowserConfig{Key: "chrome", Name: "chrome", Kind: types.Chromium, UserDataDir: udd})
+	if err != nil || b == nil {
+		t.Fatalf("NewBrowser: b=%v err=%v", b, err)
+	}
+
+	srcs := b.ArchiveSources([]types.Category{types.Cookie})
+
+	var gotCookie, gotMarker, gotLocalState bool
+	for _, s := range srcs {
+		if strings.Contains(s.LayoutRel, `\`) {
+			t.Errorf("LayoutRel must be forward-slash, got %q", s.LayoutRel)
+		}
+		switch s.LayoutRel {
+		case "Default/Network/Cookies":
+			gotCookie = true
+		case "Default/Preferences":
+			gotMarker = true
+		case "Local State":
+			gotLocalState = true
+		}
+	}
+	if !gotCookie {
+		t.Errorf("missing Cookies entry with layout path, got %+v", srcs)
+	}
+	if !gotMarker {
+		t.Errorf("missing Preferences marker entry (needed for restore profile discovery), got %+v", srcs)
+	}
+	if !gotLocalState {
+		t.Errorf("missing Local State entry (User Data root file), got %+v", srcs)
+	}
+}
+
+func TestArchiveSources_FlatLayoutNoExtraLevel(t *testing.T) {
+	// Flat-layout install: data lives directly under UserDataDir with no Default/ subdir, so
+	// discoverProfiles falls back to UserDataDir itself as the profile (profileDir == root).
+	udd := t.TempDir()
+	if err := os.WriteFile(filepath.Join(udd, "History"), []byte("x"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+
+	b, err := NewBrowser(types.BrowserConfig{Key: "opera", Name: "opera", Kind: types.Chromium, UserDataDir: udd})
+	if err != nil || b == nil {
+		t.Fatalf("NewBrowser: b=%v err=%v", b, err)
+	}
+
+	srcs := b.ArchiveSources([]types.Category{types.History})
+
+	phantom := filepath.Base(udd) + "/"
+	var gotHistory bool
+	for _, s := range srcs {
+		if strings.HasPrefix(s.LayoutRel, phantom) {
+			t.Errorf("flat layout must not insert a %q level, got %q", phantom, s.LayoutRel)
+		}
+		if s.LayoutRel == "History" {
+			gotHistory = true
+		}
+	}
+	if !gotHistory {
+		t.Errorf("expected History at archive root, got %+v", srcs)
+	}
+}