home-assistant: document HA app layer + Great Room virtual remote

Captures the home.vino.network app-layer knowledge that lived nowhere:
Lovelace storage-mode editing over the WS API, the Great Room AV topology
(Samsung Frame + HDMI matrix + Denon AVR audio + set_mode scripts), and the
bespoke great-room-remote-card (context-aware control target + volume, Samsung
KEY_* gotcha, iPhone no-scroll layout, deploy flow). Infra/access stays owned
by the fritzlab skill.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

reference/home-assistant.md

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+# Home Assistant (app layer)
+
+<scope>Dashboards (Lovelace), the Great Room AV stack, and household automations on `home.vino.network`. Access/SSH/API/Z-Wave infra is owned by the **fritzlab** skill [[home-assistant]] (`reference/home-assistant.md`). Token: `HA_ACCESS_TOKEN` in `~/code/git/code.fritzlab.net/fritzlab/k8s-manager/.env`.</scope>
+
+<lovelace>
+## Editing dashboards (Lovelace)
+Both dashboards (`Overview` url_path `lovelace`, `Map`) are **storage mode** (UI-managed), not YAML — no file to edit. Drive over the WS API:
+- Read: `{"type":"lovelace/config"}` (no `url_path` = default `Overview`) → full config (`views[]`).
+- Write: `{"type":"lovelace/config/save","config":<whole config>}` — **whole-config read-modify-write**, not per-view. Always back up the fetched config first; a bad save replaces every view.
+- Views use `subview: true` for the per-device remotes (reached by nav, not the top tab bar). Card commands: copy a *proven* button from a working view rather than guessing service/command strings.
+- No HACS, no custom themes (`frontend/get_themes` empty). Custom Lovelace cards: drop the JS in `/config/www/` (root-owned → `ssh -4 … sudo tee`), register via `{"type":"lovelace/resources/create","res_type":"module","url":"/local/<file>.js?v=N"}`. Served at `https://home.vino.network/local/<file>.js`. Browser caches resources — bump `?v=` and hard-refresh (mobile app: restart) to pick up changes.
+</lovelace>
+
+<great-room-av>
+## Great Room TV / AV topology
+TV = **Samsung Frame** (`media_player.the_frame_tv` power+vol+source `['TV','HDMI']`; `remote.the_frame_tv` needs Samsung `KEY_*` codes — see <great-room-remote-card>). WoL power-on MAC `C8:A6:EF:AE:E5:FA` via `script.turn_on_great_room_tv_2`.
+
+Sources feed an **HDMI matrix**; `select.hdmi_matrix_vino_network_output_1` (named "Great Room TV") = current TV input, `..._output_3` = speakers. Options incl. `Roku-Ultra`, `Roku-3`, `FireTvStick`, `From-GR-AVR`, `Kiosk1/2`.
+
+**Matrix-source audio is the Denon AVR**, not the TV: zones `media_player.great_room` (+ `media_player.kitchen`), source `HDMI Matrix`; volume = `media_player.great_room`, and the TV's own speaker is set near-mute by the building block. TV-direct audio = the TV itself (the remote card's volume is context-aware — see <great-room-remote-card>).
+
+Source switching = `script.set_mode_great_room_*`:
+- `movie` → Roku Ultra (alias `set-mode-great-room-roku-ultra`), `roku_3`, `fire_tv_stick`, `music`, `camera_scanner`.
+- Each sets both matrix outputs then runs `script.building_block_set_great_room_to_hdmi_matrix` (TV→HDMI, AVR zones on, vol 0.55, ALL ZONE STEREO).
+
+Source devices: Roku (`remote.roku_ultra`/`roku_3`, commands **lowercase** `home/back/up/down/left/right/select/info`); Fire TV (`remote.fire_tv_stick`, commands **UPPERCASE** `HOME/BACK/UP/DOWN/LEFT/RIGHT/CENTER/INFO/MENU`). App shortcuts via `media_player.select_source` (Roku Plex source = `Plex - Free Movies & TV`).
+</great-room-av>
+
+<remotes>
+## Virtual remotes (Lovelace subviews, Overview dashboard)
+- `great-room-tv-remote` — **the main one.** A bespoke custom card `custom:great-room-remote-card`: plus-shaped D-pad, context-aware volume, source pills (set_mode scripts), apps/playback, power toggle. Fits an iPhone with no scrolling; details in <great-room-remote-card>.
+- `roku-ultra-remote`, `roku-3-remote`, `fire-tv-stick-remote` — older stock single-device remotes (still present).
+
+URL: `https://home.vino.network/lovelace/great-room-tv-remote`. Launcher: a "Great Room TV" navigate-button under the **Virtual Remotes** heading on the `kitchen_greatroom` view (subviews aren't in the tab bar, so they need a navigate-button entry point).
+
+<great-room-remote-card>
+Source-of-truth: `~/code/git/code.fritzlab.net/dfritz/great-room-remote-card/great-room-remote-card.js` (vanilla custom element, no build step; NOT yet a git remote). Deployed copy → HA `/config/www/great-room-remote-card.js`, resource `/local/great-room-remote-card.js?v=N`. Robust layout: plus-shaped CSS-grid D-pad (no abspos) with Back/Home/Info column beside it, wrapping grids, single delegated click handler. Fits an iPhone with no scroll (~630px, ≤660 budget); apps row collapses in TV mode.
+**Control target is explicit + visible** (a "Controlling: X" line + a `[Follow source] | [TV]` toggle):
+- *Follow source* (default): D-pad/transport/apps drive the device the matrix is on (Roku `select`/lowercase, Fire TV `CENTER`/UPPERCASE). Falls back to TV when the matrix state isn't a known source (e.g. `Viewport16`).
+- *TV*: forces `remote.the_frame_tv`. One-tap fallback if a source device (asleep Roku → "Error communicating with Roku API") doesn't respond. **Samsung `samsungtv` integration needs `KEY_*` codes** (`KEY_UP/DOWN/LEFT/RIGHT/ENTER/RETURN/HOME/INFO`, `KEY_VOLUP/VOLDOWN`) — lowercase words return HTTP 200 but the TV silently ignores them (this is why the original lowercase remote never actually drove the TV).
+- Tapping a source pill switches the matrix (`set_mode` script) and snaps target back to Follow source.
+**Volume/mute are context-aware too** (per-profile `volume` entity): TV target → `media_player.the_frame_tv` (Samsung supports `volume_set`); source target → `media_player.great_room` (Denon AVR zone, the audio path for matrix sources). The slider uses a timestamp guard (not `activeElement`) so frequent `hass` updates don't snap the thumb back mid-drag on iOS. Frame TV can't launch apps via `select_source` (source_list only `['TV','HDMI']`), so apps only show for Roku/Fire. All entities/commands live in `DEFAULTS` (config-overridable).
+**Deploy after edit:** `node --check` then `cat …js | ssh -4 home-assistant.vino.network 'sudo tee /config/www/great-room-remote-card.js'`, bump resource `?v=` (WS `lovelace/resources/update`, resource_id `7ee4fcac14ea4a3b9ef76c0625a89721`), hard-refresh.
+</great-room-remote-card>
+</remotes>