Persist recent KeePassGO vault list

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/json"
 	"errors"
 	"flag"
 	"fmt"
@@ -164,6 +165,7 @@ type ui struct {
 	lifecycleMode        string
 	keyboardFocus        focusID
 	defaultSaveAsPath    string
+	recentVaultsPath     string
 	editingEntry         bool
 	recentVaults         []string
 }
@@ -241,6 +243,7 @@ func newUIWithState(mode string, sess appstate.CurrentSession) *ui {
 		selectedHistoryIndex: -1,
 		lifecycleMode:        "local",
 		defaultSaveAsPath:    defaultSaveAsPath(),
+		recentVaultsPath:     defaultRecentVaultsPath(),
 	}
 	u.state.Session = sess
 	u.phoneSplit.Value = 0.46
@@ -249,6 +252,7 @@ func newUIWithState(mode string, sess appstate.CurrentSession) *ui {
 	u.copyIcon, _ = widget.NewIcon(icons.ContentContentCopy)
 	u.passwordProfile.SetText("strong")
 	u.keyboardFocus = focusSearch
+	u.loadRecentVaults()
 	u.filter()
 	return u
 }
@@ -274,6 +278,14 @@ func defaultSaveAsPath() string {
 	return filepath.Join(cacheDir, "keepassgo", "vault.kdbx")
 }
 
+func defaultRecentVaultsPath() string {
+	configDir, err := os.UserConfigDir()
+	if err != nil || strings.TrimSpace(configDir) == "" {
+		configDir = os.TempDir()
+	}
+	return filepath.Join(configDir, "keepassgo", "recent-vaults.json")
+}
+
 func (u *ui) selectedAttachmentItems() []attachmentItem {
 	item, ok := u.selectedEntry()
 	if !ok || len(item.Attachments) == 0 {
@@ -561,6 +573,52 @@ func (u *ui) noteRecentVault(path string) {
 	if len(u.recentVaultClicks) < len(u.recentVaults) {
 		u.recentVaultClicks = make([]widget.Clickable, len(u.recentVaults))
 	}
+	u.saveRecentVaults()
+}
+
+func (u *ui) loadRecentVaults() {
+	if strings.TrimSpace(u.recentVaultsPath) == "" {
+		return
+	}
+	content, err := os.ReadFile(u.recentVaultsPath)
+	if err != nil {
+		return
+	}
+	var paths []string
+	if err := json.Unmarshal(content, &paths); err != nil {
+		return
+	}
+	filtered := make([]string, 0, len(paths))
+	seen := map[string]bool{}
+	for _, path := range paths {
+		path = strings.TrimSpace(path)
+		if path == "" || seen[path] {
+			continue
+		}
+		seen[path] = true
+		filtered = append(filtered, path)
+		if len(filtered) == 6 {
+			break
+		}
+	}
+	u.recentVaults = filtered
+	if len(u.recentVaultClicks) < len(u.recentVaults) {
+		u.recentVaultClicks = make([]widget.Clickable, len(u.recentVaults))
+	}
+}
+
+func (u *ui) saveRecentVaults() {
+	if strings.TrimSpace(u.recentVaultsPath) == "" {
+		return
+	}
+	if err := os.MkdirAll(filepath.Dir(u.recentVaultsPath), 0o700); err != nil {
+		return
+	}
+	content, err := json.MarshalIndent(u.recentVaults, "", "  ")
+	if err != nil {
+		return
+	}
+	_ = os.WriteFile(u.recentVaultsPath, content, 0o600)
 }
 
 func (u *ui) hiddenVaultRoot() string {

main_test.go

@@ -1732,6 +1732,7 @@ func TestUINoteRecentVaultDeduplicatesAndOrdersMostRecentFirst(t *testing.T) {
 	t.Parallel()
 
 	u := newUIWithSession("desktop", &session.Manager{})
+	u.recentVaultsPath = filepath.Join(t.TempDir(), "recent-vaults.json")
 	u.noteRecentVault("/tmp/one.kdbx")
 	u.noteRecentVault("/tmp/two.kdbx")
 	u.noteRecentVault("/tmp/one.kdbx")
@@ -1741,6 +1742,24 @@ func TestUINoteRecentVaultDeduplicatesAndOrdersMostRecentFirst(t *testing.T) {
 	}
 }
 
+func TestUILoadsRecentVaultsFromPersistedConfig(t *testing.T) {
+	t.Parallel()
+
+	configPath := filepath.Join(t.TempDir(), "recent-vaults.json")
+	first := newUIWithSession("desktop", &session.Manager{})
+	first.recentVaultsPath = configPath
+	first.noteRecentVault("/tmp/one.kdbx")
+	first.noteRecentVault("/tmp/two.kdbx")
+
+	second := newUIWithSession("desktop", &session.Manager{})
+	second.recentVaultsPath = configPath
+	second.loadRecentVaults()
+
+	if got := second.recentVaults; !slices.Equal(got, []string{"/tmp/two.kdbx", "/tmp/one.kdbx"}) {
+		t.Fatalf("recentVaults after reload = %v, want [/tmp/two.kdbx /tmp/one.kdbx]", got)
+	}
+}
+
 func TestUICopyActionsWriteExpectedClipboardContentsAndSanitizedFeedback(t *testing.T) {
 	t.Parallel()