feat: 添加IP竞速拨号器与IP偏好设置，连接状态显示域名与实际IP

- 新增竞速拨号器(racedial.go)：域名连接时并行解析所有A/AAAA记录，
  同时对所有IP发起TCP连接，第一个成功的胜出，确保选择延迟最低的地址
- ServerProfile新增IPPreference字段(auto/v4/v6)，支持用户指定IP版本偏好
- 填写服务器IP时跳过域名解析直接使用IP，顺序failover
- 连接成功后状态栏显示「已连接 (域名 -> 实际IP)」
- DB迁移v6：server_profiles表添加ip_preference列
- WebSocket拨号与HTTP登录均使用竞速拨号器
- 补充中英文i18n翻译

internal/ui/app.go

@@ -35,32 +35,32 @@ type App struct {
 	listSelectedIndex int
 
 	// UI widgets
-	profileSelect *widget.Select
-	stateLabel    *widget.Label
-	ipLabel       *widget.Label
-	ip6Label      *widget.Label
-	uptimeLabel   *widget.Label
-	rxV4Label     *widget.Label
-	txV4Label     *widget.Label
-	rxV6Label     *widget.Label
-	txV6Label     *widget.Label
-	rxTotalLabel  *widget.Label
-	txTotalLabel  *widget.Label
+	profileSelect    *widget.Select
+	stateLabel       *widget.Label
+	ipLabel          *widget.Label
+	ip6Label         *widget.Label
+	uptimeLabel      *widget.Label
+	rxV4Label        *widget.Label
+	txV4Label        *widget.Label
+	rxV6Label        *widget.Label
+	txV6Label        *widget.Label
+	rxTotalLabel     *widget.Label
+	txTotalLabel     *widget.Label
 	routingModeLabel *widget.Label
 	cidrV4Label      *widget.Label
 	cidrV6Label      *widget.Label
 	refreshCIDRBtn   *widget.Button
-	connectBtn    *widget.Button
-	disconnectBtn *widget.Button
+	connectBtn       *widget.Button
+	disconnectBtn    *widget.Button
 
 	// State
-	mu              sync.Mutex
-	ipcClient       *ipc.Client
-	profiles        []model.ServerProfile
-	currentProfile  *model.ServerProfile
+	mu               sync.Mutex
+	ipcClient        *ipc.Client
+	profiles         []model.ServerProfile
+	currentProfile   *model.ServerProfile
 	defaultProfileID int64
-	langSetting     string
-	windowHidden    bool
+	langSetting      string
+	windowHidden     bool
 }
 
 // Run initialises and starts the GUI application.
@@ -328,17 +328,17 @@ func (a *App) onResetDB() {
 			// Reset UI state.
 			a.currentProfile = nil
 			a.loadProfiles()
-		a.stateLabel.SetText(i18n.T("StateDisconnected"))
-		a.ipLabel.SetText(i18n.T("IpNone"))
-		a.ip6Label.SetText(i18n.T("Ip6None"))
-		a.uptimeLabel.SetText(i18n.T("UptimeNone"))
-		a.rxV4Label.SetText(i18n.T("RxV4Zero"))
-		a.txV4Label.SetText(i18n.T("TxV4Zero"))
-		a.rxV6Label.SetText(i18n.T("RxV6Zero"))
-		a.txV6Label.SetText(i18n.T("TxV6Zero"))
-		a.rxTotalLabel.SetText(i18n.T("RxTotalZero"))
-		a.txTotalLabel.SetText(i18n.T("TxTotalZero"))
-		a.setConnButtons(true, false)
+			a.stateLabel.SetText(i18n.T("StateDisconnected"))
+			a.ipLabel.SetText(i18n.T("IpNone"))
+			a.ip6Label.SetText(i18n.T("Ip6None"))
+			a.uptimeLabel.SetText(i18n.T("UptimeNone"))
+			a.rxV4Label.SetText(i18n.T("RxV4Zero"))
+			a.txV4Label.SetText(i18n.T("TxV4Zero"))
+			a.rxV6Label.SetText(i18n.T("RxV6Zero"))
+			a.txV6Label.SetText(i18n.T("TxV6Zero"))
+			a.rxTotalLabel.SetText(i18n.T("RxTotalZero"))
+			a.txTotalLabel.SetText(i18n.T("TxTotalZero"))
+			a.setConnButtons(true, false)
 		}, a.window).Show()
 }
 

internal/ui/daemon.go

@@ -86,5 +86,3 @@ func ensureDaemon() (*ipc.Client, error) {
 	}
 	return nil, fmt.Errorf("daemon did not become reachable (check %s)", logFile)
 }
-
-

internal/ui/elevation_darwin.go

@@ -29,7 +29,7 @@ func launchElevated(exe, daemonBin, home string, uid, gid int) error {
 }
 
 // shellQuote wraps a string in single quotes for shell safety.
-// Embedded single quotes are escaped using the '\'' pattern.
+// Embedded single quotes are escaped using the '\” pattern.
 func shellQuote(s string) string {
 	result := "'"
 	for _, r := range s {

internal/ui/profile.go

@@ -25,6 +25,8 @@ var (
 	protoCodes = []string{"wss", "ws"}
 
 	fetchTimingCodes = []string{string(model.FetchBefore), string(model.FetchAfter)}
+
+	ipPrefCodes = []string{string(model.IPPrefAuto), string(model.IPPrefV4), string(model.IPPrefV6)}
 )
 
 func authModeLabels() []string {
@@ -43,6 +45,10 @@ func fetchTimingLabels() []string {
 	return []string{i18n.T("FetchTimingBefore"), i18n.T("FetchTimingAfter")}
 }
 
+func ipPrefLabels() []string {
+	return []string{i18n.T("IPPrefAuto"), i18n.T("IPPrefV4"), i18n.T("IPPrefV6")}
+}
+
 // codeIndex returns the position of code in codes, or 0 if not found.
 func codeIndex(codes []string, code string) int {
 	for i, c := range codes {
@@ -63,14 +69,14 @@ func selectedCode(codes []string, idx int) string {
 
 // urlEntryRow holds the widgets for a single CIDR URL source row.
 type urlEntryRow struct {
-	urlEntry    *widget.Entry
+	urlEntry     *widget.Entry
 	timingSelect *widget.Select
-	container   *fyne.Container
+	container    *fyne.Container
 }
 
 // cidrURLList manages a dynamic list of CIDR URL source rows.
 type cidrURLList struct {
-	rows   []*urlEntryRow
+	rows      []*urlEntryRow
 	container *fyne.Container
 	parent    fyne.Window
 }
@@ -198,6 +204,7 @@ func (a *App) showProfileDialog(editing *model.ServerProfile) {
 
 	authSelect := widget.NewSelect(authModeLabels(), nil)
 	routeSelect := widget.NewSelect(routeModeLabels(), nil)
+	ipPrefSelect := widget.NewSelect(ipPrefLabels(), nil)
 
 	cidrV4Entry := widget.NewMultiLineEntry()
 	cidrV4Entry.Wrapping = fyne.TextWrapOff
@@ -300,6 +307,7 @@ func (a *App) showProfileDialog(editing *model.ServerProfile) {
 		userEntry.SetText(editing.Username)
 		authSelect.SetSelectedIndex(codeIndex(authCodes, string(editing.AuthMode)))
 		routeSelect.SetSelectedIndex(codeIndex(routeCodes, string(editing.RoutingMode)))
+		ipPrefSelect.SetSelectedIndex(codeIndex(ipPrefCodes, editing.IPPreference))
 		cidrV4Entry.SetText(editing.CIDRV4)
 		cidrV6Entry.SetText(editing.CIDRV6)
 		v4URLList.loadFromJSON(editing.CIDRV4URLs)
@@ -316,6 +324,7 @@ func (a *App) showProfileDialog(editing *model.ServerProfile) {
 		pathEntry.SetText("/ws")
 		authSelect.SetSelectedIndex(codeIndex(authCodes, string(model.AuthModeBoth)))
 		routeSelect.SetSelectedIndex(codeIndex(routeCodes, string(model.RoutingFull)))
+		ipPrefSelect.SetSelectedIndex(0) // auto
 		mtuEntry.SetText("0")
 	}
 
@@ -349,9 +358,10 @@ func (a *App) showProfileDialog(editing *model.ServerProfile) {
 			container.NewVBox(widget.NewLabel(i18n.T("FieldPassword")), passEntry),
 		),
 
-		container.NewGridWithColumns(2,
+		container.NewGridWithColumns(3,
 			container.NewVBox(widget.NewLabel(i18n.T("FieldAuthMode")), authSelect),
 			container.NewVBox(widget.NewLabel(i18n.T("FieldRoutingMode")), routeSelect),
+			container.NewVBox(widget.NewLabel(i18n.T("FieldIPPreference")), ipPrefSelect),
 		),
 
 		cidrSection,
@@ -394,7 +404,8 @@ func (a *App) showProfileDialog(editing *model.ServerProfile) {
 			mtuEntry.Text,
 			tlsCaPEMEntry.Text, tlsCaPathEntry.Text,
 			tlsPinnedHashEntry.Text, tlsInsecureCheck.Checked,
-			isNew) {
+			isNew,
+			selectedCode(ipPrefCodes, ipPrefSelect.SelectedIndex())) {
 			profileWin.Close()
 		}
 	})
@@ -414,7 +425,8 @@ func (a *App) showProfileDialog(editing *model.ServerProfile) {
 func (a *App) saveProfile(editing *model.ServerProfile,
 	name, protocol, host, ips, portStr, pathStr, user, password, authMode, routeMode,
 	cidrV4, cidrV6, cidrV4URLs, cidrV6URLs, mtuStr,
-	tlsCaPEM, tlsCaPath, tlsPinnedHash string, tlsInsecure, isNew bool) bool {
+	tlsCaPEM, tlsCaPath, tlsPinnedHash string, tlsInsecure, isNew bool,
+	ipPreference string) bool {
 	if name == "" || host == "" || user == "" {
 		showError(i18n.T("DlgValidationTitle"), i18n.T("DlgValidationMsg"), a.window)
 		return false
@@ -454,6 +466,7 @@ func (a *App) saveProfile(editing *model.ServerProfile,
 			TLSCAPath:     tlsCaPath,
 			TLSInsecure:   tlsInsecure,
 			TLSPinnedHash: tlsPinnedHash,
+			IPPreference:  ipPreference,
 		}
 		id, err := a.db.CreateProfile(p)
 		if err != nil {
@@ -486,6 +499,7 @@ func (a *App) saveProfile(editing *model.ServerProfile,
 		editing.TLSCAPath = tlsCaPath
 		editing.TLSInsecure = tlsInsecure
 		editing.TLSPinnedHash = tlsPinnedHash
+		editing.IPPreference = ipPreference
 		if err := a.db.UpdateProfile(editing); err != nil {
 			showError(i18n.T("DlgSaveError"), err.Error(), a.window)
 			return false

internal/ui/tray.go

@@ -46,20 +46,20 @@ func (a *App) setupTray() {
 		autoItem, enItem, zhItem,
 	)
 
-		connectItem := fyne.NewMenuItem(i18n.T("TrayConnect"), func() {
-			a.onConnect()
-		})
-		disconnectItem := fyne.NewMenuItem(i18n.T("TrayDisconnect"), func() {
-			a.onDisconnect()
-		})
-		if a.connectBtn != nil {
-			connectItem.Disabled = a.connectBtn.Disabled()
-		}
-		if a.disconnectBtn != nil {
-			disconnectItem.Disabled = a.disconnectBtn.Disabled()
-		}
+	connectItem := fyne.NewMenuItem(i18n.T("TrayConnect"), func() {
+		a.onConnect()
+	})
+	disconnectItem := fyne.NewMenuItem(i18n.T("TrayDisconnect"), func() {
+		a.onDisconnect()
+	})
+	if a.connectBtn != nil {
+		connectItem.Disabled = a.connectBtn.Disabled()
+	}
+	if a.disconnectBtn != nil {
+		disconnectItem.Disabled = a.disconnectBtn.Disabled()
+	}
 
-		menu := fyne.NewMenu(i18n.T("WindowTitle"),
+	menu := fyne.NewMenu(i18n.T("WindowTitle"),
 		fyne.NewMenuItem(i18n.T("TrayShowWindow"), func() {
 			a.windowHidden = false
 			activateApp()
@@ -67,9 +67,9 @@ func (a *App) setupTray() {
 			a.window.Show()
 			a.window.RequestFocus()
 		}),
-			fyne.NewMenuItemSeparator(),
-			connectItem,
-			disconnectItem,
+		fyne.NewMenuItemSeparator(),
+		connectItem,
+		disconnectItem,
 		fyne.NewMenuItemSeparator(),
 		langItem,
 		fyne.NewMenuItemSeparator(),

internal/ui/view.go

@@ -215,6 +215,7 @@ func (a *App) onConnect() {
 			TLSCAPath:     p.TLSCAPath,
 			TLSInsecure:   p.TLSInsecure,
 			TLSPinnedHash: p.TLSPinnedHash,
+			IPPreference:  p.IPPreference,
 		}
 		if err := ipc.SendStart(client, cfg); err != nil {
 			fyne.Do(func() {
@@ -428,6 +429,9 @@ func (a *App) applyStats(s stats.Snapshot) {
 		stepLabel := connectStepLabel(s.ConnectStep)
 		if stepLabel != "" {
 			a.stateLabel.SetText(i18n.T("StateConnected") + " (" + stepLabel + ")")
+		} else if s.ServerHost != "" && s.ConnectedIP != "" {
+			a.stateLabel.SetText(fmt.Sprintf("%s (%s -> %s)",
+				i18n.T("StateConnected"), s.ServerHost, s.ConnectedIP))
 		} else {
 			a.stateLabel.SetText(i18n.T("StateConnected"))
 		}