Canvas · Graphs and boards: Tab keeps a topic's words; the untested rules tested

Tab in a mind map topic being rewritten keeps the words and hands focus
back to the map; it asks for no child while the field is open, and the
map's keys wait for the field. Tests cover a new wire into a wired input
replacing the old, a connector released on its own shape linking
nothing, and a deleted whiteboard shape taking its links with it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

TASKS.md

@@ -378,3 +378,4 @@ Per-component lines live in `tasks/`. Tags there:
 | T32b | 1 | FAIL | handles drawn for a multi-selection fell through to a marquee; the palette ran past a 280px box; an open pen path outlived the tool |
 | T32b | 2 | PASS | |
 | T32c | 1 | PASS | |
+| T32d | 1 | FAIL | Tab in a mind map's rename field added a topic; the replaced wire, the connector released on its own shape and a deleted shape's links went untested |