Fix CLI mismatches from bd-2fs7 (wisp->ephemeral) (gt-pu1t5)

bd-2fs7 moved wisp/pour under bd mol, but gastown was not updated.
This caused handoff failures - gt mail send errored with 'unknown flag: --wisp'.

Changes:
- router.go: --wisp -> --ephemeral for bd create
- patrol_helpers.go: bd wisp create -> bd mol wisp create
- wisp_check.go: bd wisp gc -> bd mol wisp gc

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

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

internal/cmd/patrol_helpers.go

@@ -117,7 +117,7 @@ func autoSpawnPatrol(cfg PatrolConfig) (string, error) {
 	}
 
 	// Create the patrol wisp
-	cmdSpawn := exec.Command("bd", "--no-daemon", "wisp", "create", protoID, "--actor", cfg.RoleName)
+	cmdSpawn := exec.Command("bd", "--no-daemon", "mol", "wisp", "create", protoID, "--actor", cfg.RoleName)
 	cmdSpawn.Dir = cfg.BeadsDir
 	var stdoutSpawn, stderrSpawn bytes.Buffer
 	cmdSpawn.Stdout = &stdoutSpawn