fix(calendar): support ISO 8601 time format and add 'list' alias

- Add parsing for ISO 8601 datetime with numeric timezone without colon
  (e.g., 2026-01-09T16:38:41-0800), which is the format produced by
  macOS `date +%Y-%m-%dT%H:%M:%S%z`
- Add 'list' as an alias for 'events' subcommand for more intuitive CLI
  usage (gog calendar list instead of gog calendar events)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: salmonumbrella

internal/cmd/calendar.go

@@ -13,7 +13,7 @@ import (
 type CalendarCmd struct {
 	Calendars       CalendarCalendarsCmd       `cmd:"" name:"calendars" help:"List calendars"`
 	ACL             CalendarAclCmd             `cmd:"" name:"acl" help:"List calendar ACL"`
-	Events          CalendarEventsCmd          `cmd:"" name:"events" help:"List events from a calendar or all calendars"`
+	Events          CalendarEventsCmd          `cmd:"" name:"events" aliases:"list" help:"List events from a calendar or all calendars"`
 	Event           CalendarEventCmd           `cmd:"" name:"event" help:"Get event"`
 	Create          CalendarCreateCmd          `cmd:"" name:"create" help:"Create an event"`
 	Update          CalendarUpdateCmd          `cmd:"" name:"update" help:"Update an event"`

internal/cmd/time_helpers.go

@@ -130,6 +130,7 @@ func ResolveTimeRangeWithDefaults(ctx context.Context, svc *calendar.Service, fl
 
 // parseTimeExpr parses a time expression which can be:
 // - RFC3339: 2026-01-05T14:00:00-08:00
+// - ISO 8601 with numeric timezone: 2026-01-05T14:00:00-0800 (no colon)
 // - Date only: 2026-01-05 (interpreted as start of day in user's timezone)
 // - Relative: today, tomorrow, monday, next tuesday
 func parseTimeExpr(expr string, now time.Time, loc *time.Location) (time.Time, error) {
@@ -140,6 +141,12 @@ func parseTimeExpr(expr string, now time.Time, loc *time.Location) (time.Time, e
 		return t, nil
 	}
 
+	// Try ISO 8601 with numeric timezone without colon (e.g., -0800)
+	// This is what macOS `date +%Y-%m-%dT%H:%M:%S%z` produces
+	if t, err := time.Parse("2006-01-02T15:04:05-0700", expr); err == nil {
+		return t, nil
+	}
+
 	// Now lowercase for relative expressions
 	exprLower := strings.ToLower(expr)
 

internal/cmd/time_helpers_test.go

@@ -44,6 +44,19 @@ func TestParseTimeExprMore(t *testing.T) {
 		t.Fatalf("expected UTC location, got %v", parsed.Location())
 	}
 
+	// Test ISO 8601 with numeric timezone without colon (macOS date +%z format)
+	parsed, err = parseTimeExpr("2025-01-09T16:38:41-0800", now, loc)
+	if err != nil {
+		t.Fatalf("parseTimeExpr iso8601 numeric tz: %v", err)
+	}
+	if parsed.Hour() != 16 || parsed.Minute() != 38 || parsed.Second() != 41 {
+		t.Fatalf("unexpected iso8601 numeric tz time: %v", parsed)
+	}
+	_, offset := parsed.Zone()
+	if offset != -8*3600 {
+		t.Fatalf("unexpected iso8601 numeric tz offset: %d", offset)
+	}
+
 	parsed, err = parseTimeExpr("yesterday", now, loc)
 	if err != nil {
 		t.Fatalf("parseTimeExpr yesterday: %v", err)