Path composer: let the / key type like any character

The hop entry silently swallowed "/" — a reservation left from an earlier
design that no longer does anything (path specs use commas, and the entry
filters suggestions by name or hex). Drop the special case so "/" types
like any other printable character, e.g. to filter a name that contains one.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

meshterm/ui/path_composer.py

@@ -541,7 +541,7 @@ class PathComposerScreen(Screen):
                 self._hops.pop(self._cursor - 1)
                 self._cursor -= 1
             self._index = 0
-        elif action == "text" and data.isprintable() and data not in ("/",):
+        elif action == "text" and data.isprintable():
             if not data.isspace() or self._entry:  # never begin the entry with a space
                 self._entry += data
                 self._index = 0