feat v1.23.0: doors & windows with live open/lock state

New markup tool 'Opening': click a wall — the opening snaps onto the nearest DERIVED
room wall (v1.19.0 model: openings keep absolute coords, so room edits never break
them) and takes its angle. Dialog: type, length in real cm (door 90 / window 120 —
per-space scale makes it honest), contact sensor (invertible), lock (doors).
Rendering after easy-floorplan (MIT): hinged leaf + swing arc drawing on via
stroke-dashoffset; window = two casements. No sensor → static plan defaults (door
open, window closed); unavailable freezes the default (pure openingAmount, tested).
Lock: padlock badge (green locked / orange unlocked / grey unknown); the lock is
never toggled from the plan — clicking shows an info card with both states.
snapToWall + openingAmount in logic.ts; space.openings validated server-side.
+2 tests (76). Verified live on the dacha (real TTLock + TRV window sensor).

docs/TESTING.md

@@ -209,3 +209,17 @@ require hands on real hardware — they remain for the human pass.
 - [ ] Unknown `space` → tidy error card [auto]
 - [ ] `show_button: false` hides the footer
 - [ ] Full card honours `#space=<id>` on load and on hashchange; invalid id ignored [auto]
+
+## Doors & windows (v1.23.0)
+
+- [ ] Markup → "Opening": a click away from any wall shows a toast; near a wall — the dialog
+- [ ] A door placed on a wall renders jambs + leaf + swing arc at the wall's angle; length in cm
+      matches the ruler/scale of the space
+- [ ] Bind a contact sensor: open → leaf swings and the arc draws on in the accent colour;
+      closed → leaf lies along the wall, arc hidden; invert flips this
+- [ ] Sensor unavailable → the opening freezes at its static default (door open / window closed)
+- [ ] A door with a lock shows the padlock badge: green locked / orange unlocked / grey unknown
+- [ ] Clicking an opening (or the padlock) in view mode opens the info card with both states;
+      the lock can NOT be toggled from the plan
+- [ ] Flip toggles mirror the hinge side and the swing side
+- [ ] Click an existing opening with the tool → edit dialog; Delete removes it