Function compute_target_path 

pub fn compute_target_path(
    rule: &RedirectionRule,
    rel_key: &str,
) -> Option<PathBuf>

Computes the full target path for a redirected file. Returns None if the rule has no target configured, there’s nothing to compute a path against.

• Literal glob: target is the replacement/write file, used as-is.
• Wildcard glob: preserves the relative sub-directory structure below the rule’s fixed prefix, via [crate::matched_suffix], the same computation HookConfig::resolve uses. Exactly one implementation, so a file written via HookResolver::resolve_path_for_write and one probed via HookResolver::resolve_path or HookResolver::resolve_path_for_delete land at the same path for the same rel_key.