feat(calendar): add create-calendar command

internal/cmd/calendar.go

@@ -3,6 +3,7 @@ package cmd
 type CalendarCmd struct {
 	Calendars       CalendarCalendarsCmd       `cmd:"" name:"calendars" help:"List calendars"`
 	Subscribe       CalendarSubscribeCmd       `cmd:"" name:"subscribe" aliases:"sub,add-calendar" help:"Add a calendar to your calendar list"`
+	CreateCalendar  CalendarCreateCalendarCmd  `cmd:"" name:"create-calendar" aliases:"new-calendar" help:"Create a new secondary calendar"`
 	ACL             CalendarAclCmd             `cmd:"" name:"acl" aliases:"permissions,perms" help:"List calendar ACL"`
 	Alias           CalendarAliasCmd           `cmd:"" name:"alias" help:"Manage calendar aliases"`
 	Events          CalendarEventsCmd          `cmd:"" name:"events" aliases:"list,ls" help:"List events from a calendar or all calendars"`

internal/cmd/calendar_create_calendar.go

@@ -0,0 +1,70 @@
+package cmd
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"strings"
+
+	"google.golang.org/api/calendar/v3"
+
+	"github.com/steipete/gogcli/internal/outfmt"
+	"github.com/steipete/gogcli/internal/ui"
+)
+
+type CalendarCreateCalendarCmd struct {
+	Summary     string `arg:"" name:"summary" help:"Calendar display name"`
+	Description string `name:"description" help:"Calendar description"`
+	TimeZone    string `name:"timezone" aliases:"tz" help:"IANA timezone (e.g., America/New_York)"`
+	Location    string `name:"location" help:"Calendar location"`
+}
+
+func (c *CalendarCreateCalendarCmd) Run(ctx context.Context, flags *RootFlags) error {
+	u := ui.FromContext(ctx)
+	summary := strings.TrimSpace(c.Summary)
+	if summary == "" {
+		return usage("required: calendar name (positional argument)")
+	}
+
+	account, err := requireAccount(flags)
+	if err != nil {
+		return err
+	}
+
+	svc, err := newCalendarService(ctx, account)
+	if err != nil {
+		return err
+	}
+
+	cal := &calendar.Calendar{
+		Summary:     summary,
+		Description: strings.TrimSpace(c.Description),
+		TimeZone:    strings.TrimSpace(c.TimeZone),
+		Location:    strings.TrimSpace(c.Location),
+	}
+
+	if dryRunErr := dryRunExit(ctx, flags, "calendar.create-calendar", map[string]any{
+		"calendar": cal,
+	}); dryRunErr != nil {
+		return dryRunErr
+	}
+
+	created, err := svc.Calendars.Insert(cal).Context(ctx).Do()
+	if err != nil {
+		return fmt.Errorf("create calendar: %w", err)
+	}
+
+	if outfmt.IsJSON(ctx) {
+		return outfmt.WriteJSON(ctx, os.Stdout, map[string]any{"calendar": created})
+	}
+
+	u.Out().Printf("id\t%s", created.Id)
+	u.Out().Printf("summary\t%s", created.Summary)
+	if created.TimeZone != "" {
+		u.Out().Printf("timezone\t%s", created.TimeZone)
+	}
+	if created.Description != "" {
+		u.Out().Printf("description\t%s", created.Description)
+	}
+	return nil
+}