fix v1.42.2: no hover tooltips on touch devices

- taps on tablets synthesized mousemove and popped the tooltip over the
  finger (user feedback item 5); _showTip gated by (hover: none)
- smoke_touch_tips.mjs (matchMedia shim); TESTING/CHANGELOG same-commit

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
+- [ ] No hover tooltips on touch (v1.42.2): on hover-less devices (tablets,
+      phones) taps never pop the room/device tooltip — the data lives in room
+      cards and long-press; desktop hover tooltips unchanged [auto]
 - [ ] Card font scales (v1.42.1): three sliders — space-level base (space
       dialog) plus per-room name and metrics sizes (room settings), 50–300%,
       multiplied together and on top of resize-k and kiosk multipliers; the