all: apply golangci-lint 2.9.0 fixes

Fix issues found by the upgraded golangci-lint:
- wsl_v5: add required whitespace in CLI files
- staticcheck SA4006: replace new(var.Field) with &localVar
  pattern since staticcheck does not recognize Go 1.26
  new(value) as a use of the variable
- staticcheck SA5011: use t.Fatal instead of t.Error for
  nil guard checks so execution stops
- unused: remove dead ptrTo helper function

cmd/headscale/cli/api_key.go

@@ -71,6 +71,7 @@ var listAPIKeys = &cobra.Command{
 		tableData := pterm.TableData{
 			{"ID", "Prefix", "Expiration", "Created"},
 		}
+
 		for _, key := range response.GetApiKeys() {
 			expiration := "-"
 
@@ -84,8 +85,8 @@ var listAPIKeys = &cobra.Command{
 				expiration,
 				key.GetCreatedAt().AsTime().Format(HeadscaleDateTimeFormat),
 			})
-
 		}
+
 		err = pterm.DefaultTable.WithHasHeader().WithData(tableData).Render()
 		if err != nil {
 			ErrorOutput(

cmd/headscale/cli/health.go

@@ -15,6 +15,7 @@ var healthCmd = &cobra.Command{
 	Long:  "Check the health of the Headscale server. This command will return an exit code of 0 if the server is healthy, or 1 if it is not.",
 	Run: func(cmd *cobra.Command, args []string) {
 		output, _ := cmd.Flags().GetString("output")
+
 		ctx, client, conn, cancel := newHeadscaleCLIWithConfig()
 		defer cancel()
 		defer conn.Close()

cmd/headscale/cli/nodes.go

@@ -105,6 +105,7 @@ var registerNodeCmd = &cobra.Command{
 	Short: "Registers a node to your network",
 	Run: func(cmd *cobra.Command, args []string) {
 		output, _ := cmd.Flags().GetString("output")
+
 		user, err := cmd.Flags().GetString("user")
 		if err != nil {
 			ErrorOutput(err, fmt.Sprintf("Error getting user: %s", err), output)
@@ -152,6 +153,7 @@ var listNodesCmd = &cobra.Command{
 	Aliases: []string{"ls", "show"},
 	Run: func(cmd *cobra.Command, args []string) {
 		output, _ := cmd.Flags().GetString("output")
+
 		user, err := cmd.Flags().GetString("user")
 		if err != nil {
 			ErrorOutput(err, fmt.Sprintf("Error getting user: %s", err), output)
@@ -200,6 +202,7 @@ var listNodeRoutesCmd = &cobra.Command{
 	Aliases: []string{"lsr", "routes"},
 	Run: func(cmd *cobra.Command, args []string) {
 		output, _ := cmd.Flags().GetString("output")
+
 		identifier, err := cmd.Flags().GetUint64("identifier")
 		if err != nil {
 			ErrorOutput(
@@ -283,7 +286,9 @@ var expireNodeCmd = &cobra.Command{
 
 			return
 		}
+
 		now := time.Now()
+
 		expiryTime := now
 		if expiry != "" {
 			expiryTime, err = time.Parse(time.RFC3339, expiry)
@@ -350,6 +355,7 @@ var renameNodeCmd = &cobra.Command{
 		if len(args) > 0 {
 			newName = args[0]
 		}
+
 		request := &v1.RenameNodeRequest{
 			NodeId:  identifier,
 			NewName: newName,
@@ -409,6 +415,7 @@ var deleteNodeCmd = &cobra.Command{
 		}
 
 		confirm := false
+
 		force, _ := cmd.Flags().GetBool("force")
 		if !force {
 			confirm = util.YesNo(fmt.Sprintf(
@@ -424,6 +431,7 @@ var deleteNodeCmd = &cobra.Command{
 
 				return
 			}
+
 			if err != nil {
 				ErrorOutput(
 					err,
@@ -431,6 +439,7 @@ var deleteNodeCmd = &cobra.Command{
 					output,
 				)
 			}
+
 			SuccessOutput(
 				map[string]string{"Result": "Node deleted"},
 				"Node deleted",
@@ -659,6 +668,7 @@ var tagCmd = &cobra.Command{
 	Aliases: []string{"tags", "t"},
 	Run: func(cmd *cobra.Command, args []string) {
 		output, _ := cmd.Flags().GetString("output")
+
 		ctx, client, conn, cancel := newHeadscaleCLIWithConfig()
 		defer cancel()
 		defer conn.Close()
@@ -672,6 +682,7 @@ var tagCmd = &cobra.Command{
 				output,
 			)
 		}
+
 		tagsToSet, err := cmd.Flags().GetStringSlice("tags")
 		if err != nil {
 			ErrorOutput(
@@ -686,6 +697,7 @@ var tagCmd = &cobra.Command{
 			NodeId: identifier,
 			Tags:   tagsToSet,
 		}
+
 		resp, err := client.SetTags(ctx, request)
 		if err != nil {
 			ErrorOutput(
@@ -710,6 +722,7 @@ var approveRoutesCmd = &cobra.Command{
 	Short: "Manage the approved routes of a node",
 	Run: func(cmd *cobra.Command, args []string) {
 		output, _ := cmd.Flags().GetString("output")
+
 		ctx, client, conn, cancel := newHeadscaleCLIWithConfig()
 		defer cancel()
 		defer conn.Close()
@@ -723,6 +736,7 @@ var approveRoutesCmd = &cobra.Command{
 				output,
 			)
 		}
+
 		routes, err := cmd.Flags().GetStringSlice("routes")
 		if err != nil {
 			ErrorOutput(
@@ -737,6 +751,7 @@ var approveRoutesCmd = &cobra.Command{
 			NodeId: identifier,
 			Routes: routes,
 		}
+
 		resp, err := client.SetApprovedRoutes(ctx, request)
 		if err != nil {
 			ErrorOutput(

cmd/headscale/cli/policy.go

@@ -56,9 +56,12 @@ var getPolicy = &cobra.Command{
 	Aliases: []string{"show", "view", "fetch"},
 	Run: func(cmd *cobra.Command, args []string) {
 		output, _ := cmd.Flags().GetString("output")
+
 		var policy string
+
 		if bypass, _ := cmd.Flags().GetBool(bypassFlag); bypass {
 			confirm := false
+
 			force, _ := cmd.Flags().GetBool("force")
 			if !force {
 				confirm = util.YesNo("DO NOT run this command if an instance of headscale is running, are you sure headscale is not running?")
@@ -134,6 +137,7 @@ var setPolicy = &cobra.Command{
 
 		if bypass, _ := cmd.Flags().GetBool(bypassFlag); bypass {
 			confirm := false
+
 			force, _ := cmd.Flags().GetBool("force")
 			if !force {
 				confirm = util.YesNo("DO NOT run this command if an instance of headscale is running, are you sure headscale is not running?")

cmd/headscale/cli/preauthkeys.go

@@ -80,6 +80,7 @@ var listPreAuthKeys = &cobra.Command{
 				"Owner",
 			},
 		}
+
 		for _, key := range response.GetPreAuthKeys() {
 			expiration := "-"
 			if key.GetExpiration() != nil {
@@ -105,8 +106,8 @@ var listPreAuthKeys = &cobra.Command{
 				key.GetCreatedAt().AsTime().Format("2006-01-02 15:04:05"),
 				owner,
 			})
-
 		}
+
 		err = pterm.DefaultTable.WithHasHeader().WithData(tableData).Render()
 		if err != nil {
 			ErrorOutput(

cmd/headscale/cli/users.go

@@ -112,10 +112,12 @@ var createUserCmd = &cobra.Command{
 					output,
 				)
 			}
+
 			request.PictureUrl = pictureURL
 		}
 
 		log.Trace().Interface(zf.Request, request).Msg("sending CreateUser request")
+
 		response, err := client.CreateUser(ctx, request)
 		if err != nil {
 			ErrorOutput(
@@ -167,6 +169,7 @@ var destroyUserCmd = &cobra.Command{
 		user := users.GetUsers()[0]
 
 		confirm := false
+
 		force, _ := cmd.Flags().GetBool("force")
 		if !force {
 			confirm = util.YesNo(fmt.Sprintf(
@@ -186,6 +189,7 @@ var destroyUserCmd = &cobra.Command{
 					output,
 				)
 			}
+
 			SuccessOutput(response, "User destroyed", output)
 		} else {
 			SuccessOutput(map[string]string{"Result": "User not destroyed"}, "User not destroyed", output)
@@ -246,6 +250,7 @@ var listUsersCmd = &cobra.Command{
 				},
 			)
 		}
+
 		err = pterm.DefaultTable.WithHasHeader().WithData(tableData).Render()
 		if err != nil {
 			ErrorOutput(