fix v1.31.1: room card interactions no longer feed the active markup tool

- _markupClick ignores clicks originating from .roomlabel/.rlhandle
  (composedPath) and anything during an active drag/resize
- smoke_card_tool_conflict.mjs (draw/delroom/handle/during-resize +
  normal stage click still works); TESTING/CHANGELOG same-commit

docs/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## v1.31.1 — 2026-07-22
+- Plan editor: interacting with a room card (drag, corner-resize or a plain
+  click) no longer leaks into the active markup tool — previously the click
+  after a resize could add an outline point, pick a merge/split room or even
+  prompt to delete the room under the card.
+
 ## v1.31.0 — 2026-07-22 (room cards)
 - Room labels grew into **room cards**: the name on top, and an optional
   smaller metrics line below — temperature, humidity, average Zigbee signal

docs/TESTING.md

@@ -140,6 +140,9 @@ Run the *core flows* (marked ★ below) in each environment at least once per mi
       (explicit ripple color still wins); off/white lights unchanged [auto]
 - [ ] Alarm pulse (v1.27.0): leak/smoke/gas/CO/siren in 'on' pulse a red ring over any
       display mode; clears on 'off'; unavailable never alarms [auto]; reduced-motion static
+- [ ] Card vs tool conflict (v1.31.1): in the Plan editor, dragging/resizing or
+      clicking a room card never feeds the active tool (no draw point, no
+      delete-room confirm, no merge/split pick); clicks past the card work [auto]
 - [ ] Room cards (v1.31.0): with metrics enabled in space settings (4
       checkboxes: temperature, humidity, avg Zigbee, lights) the room name gets
       a smaller metrics line under it; lights show On/Off or "1 of 3" when