feat v1.28.0: sub-area rooms — manual device placement without an HA area (issue #3)

- area-less rooms appear in the marker room list ('no area, manual'); markers
  store room_id and land at the room centre; dialog reopen restores the choice
- pure parseRoomRef (space#area / space#@roomId) + unit tests; backend schema
- ROADMAP phase 11 closed; TESTING.md row; smoke_subarea.mjs

docs/CHANGELOG.md

@@ -1,5 +1,15 @@
 # Changelog
 
+## v1.28.0 — 2026-07-21 (sub-area rooms: manual placement without an HA area; issue #3)
+- **Devices can now be placed into rooms that have no Home Assistant area.**
+  The marker dialog's room list includes area-less rooms (marked "no area,
+  manual"); pick one and the device/virtual marker lands at its centre. The
+  marker stores `room_id`, so the choice survives edits and re-opens. The
+  laundry-cupboard case from issue #3: a decorative room inside a larger area
+  can now hold its own door sensor and light.
+- Room reference parsing extracted as pure `parseRoomRef` (`space#area` /
+  `space#@roomId`), unit-tested; backend schema for `room_id`.
+
 ## v1.27.0 — 2026-07-21 (RGB light colors + alarm pulse; issue #3)
 - **RGB lights show their actual color**: an "on" light with a color tints its
   bulb icon, glow and — unless a custom ripple color is set — its presence ripple.

docs/ROADMAP.md

@@ -74,12 +74,12 @@ Track progress in `custom_components/houseplan/quality_scale.yaml` (done/exempt
 - [ ] GitHub: issue templates, discussions on, CONTRIBUTING.md (build/test in 5 minutes).
 - [ ] Semantic versioning discipline; keep release notes user-facing (they show in HACS).
 
-## Phase 11 — UX modes redesign (approved, see docs/UX-MODES.md)
+## Phase 11 — UX modes redesign ✅ DONE (v1.25.0–v1.28.0, see docs/UX-MODES.md)
 
-Three-tab interaction model (View / Plan / Devices): view mode is display-only —
-no dragging or editing; all editing splits between a Plan tab and a Devices tab.
-Deprecates "drag anywhere" and view-mode opening drag. Follow-ups from issue #3:
-state-reflecting icons, value display, RGB light colors, alarm visuals, sub-area rooms.
+Shipped: the three-tab interaction model (View / Plan / Devices, v1.25.0),
+state-reflecting icons + value display (v1.26.0), RGB light colors + alarm pulse
+(v1.27.0), sub-area rooms (v1.28.0). Remaining backlog from issue #3: music
+notes for players, directional TV ripples (not planned).
 
 ## Explicit non-goals (for now)
 

docs/TESTING.md

@@ -139,6 +139,9 @@ Run the *core flows* (marked ★ below) in each environment at least once per mi
 - [ ] Open via info card → Edit; all fields persist (name, icon, model, link, description)
 - [ ] Rebind to another device/entity/helper: search filters; already-placed candidates excluded; old position cleaned up [auto backend]
 - [ ] Virtual device: requires name; room required; renders dashed
+- [ ] Sub-area rooms (v1.28.0): a room WITHOUT an HA area appears in the marker
+      room list ("no area, manual"); a device placed there lands at its centre,
+      the marker stores room_id, reopening the dialog restores the choice [auto]
 - [ ] Room override moves the icon to the room center
 - [ ] Tap-action override select (default/info/more-info/toggle) saves and applies
 - [ ] PDF/manual upload: ok path; >50 MB → readable error; .exe → bad-ext error [auto backend]; traversal names sanitized [auto backend]