feat(cli): incident info --num + channel team/creator names (fc-event#1674)

Propagate fc-event#1674 through the generated layer by bumping go-flashduty to
the synced+regenerated spec, plus a cligen enhancement so the now-optional
incident_id stays back-compatible:

- incident info: new --num flag (server-side 6-char short-id lookup); incident_id
  relaxed to optional. Add an OPTIONAL positional mode to cligen (optionalArg +
  positional.Optional + optionalPositional map) so `incident info <id>` keeps
  working while `incident info --num CBE249` resolves and bare `incident info`
  (with --num) is valid; `incident info a b` still rejected.
- channel list/info: response help documents team_name + creator_name.

go-flashduty pinned to the chore/enrich-1674-spec commit (pseudo-version);
re-pin to the released version after go-flashduty#11 merges. Build + unit tests
(incl. gen_positional) pass.

Author: ysyneu

go.mod

@@ -3,7 +3,7 @@ module github.com/flashcatcloud/flashduty-cli
 go 1.25.1
 
 require (
-	github.com/flashcatcloud/go-flashduty v0.5.4-0.20260602051355-7583ebae5b07
+	github.com/flashcatcloud/go-flashduty v0.5.4-0.20260616041609-da82c4097dd1
 	github.com/mattn/go-runewidth v0.0.24
 	github.com/spf13/cobra v1.10.2
 	github.com/spf13/pflag v1.0.10

go.sum

@@ -1,8 +1,8 @@
 github.com/clipperhouse/uax29/v2 v2.2.0 h1:ChwIKnQN3kcZteTXMgb1wztSgaU+ZemkgWdohwgs8tY=
 github.com/clipperhouse/uax29/v2 v2.2.0/go.mod h1:EFJ2TJMRUaplDxHKj1qAEhCtQPW2tJSwu5BF98AuoVM=
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
-github.com/flashcatcloud/go-flashduty v0.5.4-0.20260602051355-7583ebae5b07 h1:bi1rOjR2OY+TovBGabtVOTcEQWlgzU9RfEwlJxU+3n8=
-github.com/flashcatcloud/go-flashduty v0.5.4-0.20260602051355-7583ebae5b07/go.mod h1:aA0RtZEs0AYOwwdNKdtVeD8YMOdnmVY1zAlVD+9Ovx8=
+github.com/flashcatcloud/go-flashduty v0.5.4-0.20260616041609-da82c4097dd1 h1:K/TceO2NHUPAB8Ew7p/7y6gGDjokNpHyd30uxi8FApc=
+github.com/flashcatcloud/go-flashduty v0.5.4-0.20260616041609-da82c4097dd1/go.mod h1:aA0RtZEs0AYOwwdNKdtVeD8YMOdnmVY1zAlVD+9Ovx8=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
 github.com/mattn/go-runewidth v0.0.24 h1:cpokDiIn0MGnhdHwuWnJBITySJ20QyNGnY2kR/ay2DU=

internal/cli/args.go

@@ -41,6 +41,24 @@ func requireExactArg(name string) cobra.PositionalArgs {
 	}
 }
 
+// optionalArg returns a positional argument validator that accepts zero or one
+// argument named name. It backs generated commands whose positional folds into
+// an OPTIONAL body field because the operation also accepts an alternative
+// lookup key via a flag (e.g. `incident info` takes either the <incident-id>
+// positional or --num). Extra arguments are rejected rather than silently
+// dropped:
+//
+//   - zero or one arg: ok
+//   - >1 args:         "expects at most one <name>. Usage: ..."
+func optionalArg(name string) cobra.PositionalArgs {
+	return func(cmd *cobra.Command, args []string) error {
+		if len(args) > 1 {
+			return fmt.Errorf("expects at most one %s. Usage: %s", name, cmd.UseLine())
+		}
+		return nil
+	}
+}
+
 // requireExactlyOneFlag validates that exactly one of the named flags is set.
 func requireExactlyOneFlag(cmd *cobra.Command, flagNames ...string) error {
 	set := 0

internal/cli/gen_positional_test.go

@@ -29,19 +29,26 @@ func TestGenPositionalUseLine(t *testing.T) {
 		t.Errorf("ack twin Args rejected one arg: %v", err)
 	}
 
+	// `incident info` pins incident_id as an OPTIONAL positional: the backend
+	// relaxed incident_id (a lookup may instead pass the 6-char num via --num), so
+	// the positional is 0-or-1. `info <id>` stays for back-compat; `info` alone
+	// (with --num) is valid; `info id1 id2` is still rejected.
 	info := genIncidentsInfoCmd()
-	if got := info.Use; got != "info <incident-id>" {
-		t.Errorf("info twin Use = %q, want %q", got, "info <incident-id>")
+	if got := info.Use; got != "info [<incident-id>]" {
+		t.Errorf("info twin Use = %q, want %q", got, "info [<incident-id>]")
 	}
 	if info.Args == nil {
 		t.Errorf("info twin has no Args validator")
 	}
-	if err := info.Args(info, nil); err == nil {
-		t.Errorf("info twin Args accepted zero args (want exactly one)")
+	if err := info.Args(info, nil); err != nil {
+		t.Errorf("info twin Args rejected zero args (want 0-or-1; --num path): %v", err)
 	}
 	if err := info.Args(info, []string{"id1"}); err != nil {
 		t.Errorf("info twin Args rejected one arg: %v", err)
 	}
+	if err := info.Args(info, []string{"id1", "id2"}); err == nil {
+		t.Errorf("info twin Args accepted two args (want at most one)")
+	}
 
 	// Override cases: merge pins target_incident_id (NOT source_incident_ids);
 	// war-room detail pins chat_id.