claude-code: undo a home removal through the mesh

A removal kept its copy but nothing could put it back without a shell on
the machine. claude_code_home_restore puts a kept copy back when nothing is
at its path and the copy matches the digests recorded at removal;
claude_code_home_removed lists what is kept.

modules/claude-code/README.md

@@ -78,7 +78,11 @@ operator account's own `~/.claude` on those nodes):
   removing it is the person's act, and this tool is that act made explicit. `why` is required; what the
   mesh placed is refused (its `_unregister` owns it), and so is a symbolic link. A copy is kept first in
   the module's state, `removed-from-home/<date>/<time>-<kind>-<name>/`, with a `removal.json` note, and
-  the removal and its reason are appended to `removed-from-home/removed.log`; the answer names the copy.
+  the removal and its reason are appended to `removed-from-home/removed.log`; the answer names the copy;
+- `claude_code_home_removed`: every kept removal, newest first, with its `keptAt` and whether it was put back;
+- `claude_code_home_restore` (`kept`): puts a removal's copy back at its path — refused when something is
+  there now, or when the copy is not, file by file, what its `removal.json` digests say was removed.
+  Logged to `removed.log` and the journal; the copy stays, marked with a `restored.json`.
 
 A new session takes a change; a running one at `/reload-plugins`.