fix: Parse rig/name format in crew commands

All crew commands now accept "rig/name" syntax (e.g., "beads/emma")
in addition to requiring --rig flag. The rig is extracted from the
first path component.

Affected commands:
- gt crew at
- gt crew restart
- gt crew refresh
- gt crew remove
- gt crew rename
- gt crew status
- gt crew pristine

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

internal/cmd/crew_lifecycle.go

@@ -15,6 +15,13 @@ import (
 
 func runCrewRemove(cmd *cobra.Command, args []string) error {
 	name := args[0]
+	// Parse rig/name format (e.g., "beads/emma" -> rig=beads, name=emma)
+	if rig, crewName, ok := parseRigSlashName(name); ok {
+		if crewRig == "" {
+			crewRig = rig
+		}
+		name = crewName
+	}
 
 	crewMgr, r, err := getCrewManager(crewRig)
 	if err != nil {
@@ -59,6 +66,13 @@ func runCrewRemove(cmd *cobra.Command, args []string) error {
 
 func runCrewRefresh(cmd *cobra.Command, args []string) error {
 	name := args[0]
+	// Parse rig/name format (e.g., "beads/emma" -> rig=beads, name=emma)
+	if rig, crewName, ok := parseRigSlashName(name); ok {
+		if crewRig == "" {
+			crewRig = rig
+		}
+		name = crewName
+	}
 
 	crewMgr, r, err := getCrewManager(crewRig)
 	if err != nil {
@@ -143,6 +157,13 @@ func runCrewRefresh(cmd *cobra.Command, args []string) error {
 
 func runCrewRestart(cmd *cobra.Command, args []string) error {
 	name := args[0]
+	// Parse rig/name format (e.g., "beads/emma" -> rig=beads, name=emma)
+	if rig, crewName, ok := parseRigSlashName(name); ok {
+		if crewRig == "" {
+			crewRig = rig
+		}
+		name = crewName
+	}
 
 	crewMgr, r, err := getCrewManager(crewRig)
 	if err != nil {