feat: add team CRUD commands (get, create, update, delete)

Add full team management CLI commands with both table and JSON output:

- team get: view team detail by --id, --name, or --ref-id
  Parallel /team/info + /team/infos for full metadata with member names
- team create: create team with --name, --description, --person-ids, --emails
- team update: update team by --id with any combination of fields
  Clear warning that --person-ids replaces the entire member list
- team delete: delete team with interactive confirmation prompt
  Supports --force to skip confirmation
- team list: enhanced with --limit, --orderby, --asc, --person-id flags

New shared helpers:
- WriteResultJSON: structured JSON for write operations
- confirmAction: interactive delete confirmation using cmd.InOrStdin()
- requireExactlyOneFlag: mutual exclusivity validator for identifier flags

Depends on flashduty-sdk feat/team-crud branch.

Author: debidong

go.mod

@@ -16,3 +16,5 @@ require (
 	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/sys v0.43.0 // indirect
 )
+
+replace github.com/flashcatcloud/flashduty-sdk => ../flashduty-sdk

go.sum

@@ -1,8 +1,4 @@
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
-github.com/flashcatcloud/flashduty-sdk v0.8.1-0.20260513114317-7c106c52bd36 h1:yrY7iNBkZrcj6qRZsXwCzMTXjKKzDRGlca/QRfNqiZI=
-github.com/flashcatcloud/flashduty-sdk v0.8.1-0.20260513114317-7c106c52bd36/go.mod h1:dG4eJfdZaj4jNBMwEexbfK/3PmcIMhNeJ88L/DcZzUY=
-github.com/flashcatcloud/flashduty-sdk v0.8.1-0.20260513121733-bf978e2213f5 h1:AwVNa+CrGqSl60Pq2RQKRV+layS5coJQx01Np+34HD4=
-github.com/flashcatcloud/flashduty-sdk v0.8.1-0.20260513121733-bf978e2213f5/go.mod h1:dG4eJfdZaj4jNBMwEexbfK/3PmcIMhNeJ88L/DcZzUY=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=

internal/cli/args.go

@@ -1,10 +1,13 @@
 package cli
 
 import (
+	"bufio"
 	"fmt"
+	"os"
 	"strings"
 
 	"github.com/spf13/cobra"
+	"golang.org/x/term"
 )
 
 // requireArgs returns a positional argument validator that produces descriptive
@@ -20,3 +23,39 @@ func requireArgs(argNames ...string) cobra.PositionalArgs {
 		return nil
 	}
 }
+
+// requireExactlyOneFlag validates that exactly one of the named flags is set.
+func requireExactlyOneFlag(cmd *cobra.Command, flagNames ...string) error {
+	set := 0
+	for _, name := range flagNames {
+		if cmd.Flags().Changed(name) {
+			set++
+		}
+	}
+	if set != 1 {
+		return fmt.Errorf("exactly one of --%s must be specified", strings.Join(flagNames, ", --"))
+	}
+	return nil
+}
+
+// confirmAction prompts the user for confirmation in interactive terminals.
+// Returns true if the user confirms, or if running in non-interactive / JSON / --force mode.
+func confirmAction(cmd *cobra.Command, message string) bool {
+	if flagJSON {
+		return true
+	}
+	force, _ := cmd.Flags().GetBool("force")
+	if force {
+		return true
+	}
+	if !term.IsTerminal(int(os.Stdin.Fd())) {
+		return true
+	}
+	_, _ = fmt.Fprintf(cmd.OutOrStdout(), "%s [y/N]: ", message)
+	scanner := bufio.NewScanner(cmd.InOrStdin())
+	if scanner.Scan() {
+		answer := strings.TrimSpace(strings.ToLower(scanner.Text()))
+		return answer == "y" || answer == "yes"
+	}
+	return false
+}

internal/cli/command.go

@@ -1,6 +1,7 @@
 package cli
 
 import (
+	"encoding/json"
 	"fmt"
 	"io"
 
@@ -64,3 +65,18 @@ func (ctx *RunContext) PrintTotal(items any, cols []output.Column, total int) er
 func (ctx *RunContext) WriteResult(message string) {
 	writeResult(ctx.Writer, message)
 }
+
+// WriteResultJSON outputs structured data as JSON in --json mode,
+// or a human-readable message in table mode.
+func (ctx *RunContext) WriteResultJSON(data any, humanMessage string) error {
+	if ctx.JSON {
+		out, err := json.MarshalIndent(data, "", "  ")
+		if err != nil {
+			return fmt.Errorf("failed to marshal JSON: %w", err)
+		}
+		_, _ = fmt.Fprintln(ctx.Writer, string(out))
+		return nil
+	}
+	_, _ = fmt.Fprintln(ctx.Writer, humanMessage)
+	return nil
+}

internal/cli/command_test.go

@@ -215,6 +215,19 @@ func (m *mockClient) CancelStatusPageMigration(context.Context, string) error {
 	return fmt.Errorf("mockClient: CancelStatusPageMigration not implemented")
 }
 
+// Phase 5: Team Management
+func (m *mockClient) GetTeamInfo(context.Context, *flashduty.TeamGetInput) (*flashduty.TeamItem, error) {
+	return nil, fmt.Errorf("mockClient: GetTeamInfo not implemented")
+}
+
+func (m *mockClient) UpsertTeam(context.Context, *flashduty.TeamUpsertInput) (*flashduty.TeamUpsertOutput, error) {
+	return nil, fmt.Errorf("mockClient: UpsertTeam not implemented")
+}
+
+func (m *mockClient) DeleteTeam(context.Context, *flashduty.TeamDeleteInput) error {
+	return fmt.Errorf("mockClient: DeleteTeam not implemented")
+}
+
 // saveAndResetGlobals saves the current state of all global vars that commands
 // mutate, resets them to safe defaults, and returns a restore function for
 // t.Cleanup.

internal/cli/root.go

@@ -80,6 +80,11 @@ type flashdutyClient interface {
 	StartStatusPageEmailSubscriberMigration(ctx context.Context, input *flashduty.StartStatusPageEmailSubscriberMigrationInput) (*flashduty.StartStatusPageMigrationOutput, error)
 	GetStatusPageMigrationStatus(ctx context.Context, jobID string) (*flashduty.StatusPageMigrationJob, error)
 	CancelStatusPageMigration(ctx context.Context, jobID string) error
+
+	// === PHASE 5: Team Management ===
+	GetTeamInfo(ctx context.Context, input *flashduty.TeamGetInput) (*flashduty.TeamItem, error)
+	UpsertTeam(ctx context.Context, input *flashduty.TeamUpsertInput) (*flashduty.TeamUpsertOutput, error)
+	DeleteTeam(ctx context.Context, input *flashduty.TeamDeleteInput) error
 }
 
 // newClientFn creates a flashdutyClient. Override in tests to inject a mock.