workspace_restart.go:127-133 accepted body.Template (attacker-controlled)
via raw filepath.Join(h.configsDir, template), allowing path traversal
(e.g. "../../../etc") to escape configsDir.
Fix: replace raw filepath.Join with resolveInsideRoot, same pattern as
workspace.go:102 (already fixed) and workspace.go:249 (already fixed).
Both the explicit template path and the findTemplateByName fallback are
safe — findTemplateByName returns a directory name from os.ReadDir which
is inherently bounded and cannot contain "/".
On resolve error the template is cleared so findTemplateByName fallback
still fires (preserves existing restart behaviour when template is invalid).
Closes: #1043
Co-authored-by: Molecule AI Core-BE <core-be@agents.moleculesai.app>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>