Clear Layers

Steps

1. Resolve $DATA_ROOT and read config.json. Identify apply_target.path.
2. Backup the current target file to $DATA_ROOT/backups/<basename>.<timestamp>.bak.
3. Remove the entire <!-- style-switcher:start --> … <!-- style-switcher:end --> block (and the blank line preceding it, if present) from the target file. Leave everything else untouched.
4. Set active_layers: {} and active_recipe: null in config.json. Update applied_at to ISO-8601 now.
5. Append one JSON line to $DATA_ROOT/state/history.jsonl:

   {"ts":"<iso>","action":"clear-layers","target":"<path>"}
   

6. Confirm — print the target path and "no layers active".

Snippets in the library are not deleted. Use delete-snippet for that.