v1.49.0: content-fit zoom, swipe animation, wording, and the v1.47.0 review

Owner's batch:
- zoom now opens on what is DRAWN (rooms + 5% margin) for spaces with no
  background image; with one the image is the plan and still fits whole. A small
  plan on the square canvas no longer opens as a speck.
- swiping between spaces, and the kiosk carousel, slide sideways; honours
  prefers-reduced-motion.
- the room settings button reads 'Room settings' and lightens on hover.
- 'curation' is filtering everywhere: UI strings, docs, code.

Checked the yard while I was there: its drawing sits off-centre because it was
drawn that way — before the migration x spanned 0.12..0.54 with 0.12 and 0.46 of
margin. The migration added 0.1465 on each side, symmetrically. Content-fit zoom
makes it moot anyway.

From the v1.47.0 review:
- HP-1470-02: the picker let you delete the plan you had just selected — it is
  not in the stored config yet, so the server rightly called it free, and the
  save then stored a url with no file. The button is disabled, and since two
  clients can do this in either order, config/set now verifies every internal
  plan url against the disk under the write lock and answers .
  External and legacy urls are not ours to police.
- HP-1470-01: growth is bounded at the door rather than by deleting old files —
  that mistake cost real plans twice. check_quota refuses an upload that would
  push the store past 256 MB / 200 plans (1 GB / 1000 attachments) or leave less
  than 512 MB free. The plan list is capped at 60 newest with a total, and
  thumbnails load lazily.
- HP-1470-03: picking a saved plan waited for nothing and stored a fallback
  ratio when the signature had not arrived — a square plan came out stretched.
  It waits for the signature, binds the result to the dialog that asked, and the
  dialog preview is signed too.
- report §5: the last lifecycle comments still described age-based collection.

Not released yet — the owner asked for a release once the batch is done.

tests_backend/test_ha_websocket.py

@@ -1161,3 +1161,49 @@ async def test_stored_plans_can_be_listed_and_deleted_on_request(
     )
     bad = await client.receive_json()
     assert not bad["success"] and bad["error"]["code"] == "invalid_name"
+
+
+async def test_config_set_refuses_a_plan_that_no_longer_exists(
+    hass: HomeAssistant, hass_ws_client: WebSocketGenerator
+) -> None:
+    """HP-1470-02: a stored internal plan url must name a file that exists.
+
+    The card can pick a plan and delete it from the same dialog, and two clients
+    can do the same in either order. The lock serialises them; it says nothing
+    about whether the file survived, so the check has to be here.
+    """
+    await _setup(hass)
+    client = await hass_ws_client(hass)
+
+    url, name = await _upload(client, "x1", b"PLAN", ext="png")
+    await client.send_json_auto_id({"type": "houseplan/plans/delete", "name": name})
+    assert (await client.receive_json())["result"]["removed"] is True
+
+    resp = await _save(client, await _cfg([{"id": "x1", "plan_url": url}]), 0)
+    assert not resp["success"] and resp["error"]["code"] == "missing_plan"
+
+    # an external or legacy url is the user's business, not ours to verify
+    assert (await _save(client, await _cfg([{"id": "x1", "plan_url": "/local/mine.png"}]), 0))["success"]
+
+
+async def test_uploads_are_bounded_by_a_store_quota(
+    hass: HomeAssistant, hass_ws_client: WebSocketGenerator, monkeypatch
+) -> None:
+    """HP-1470-01: nothing is deleted for being old, so growth stops at the door."""
+    from custom_components.houseplan import websocket_api as wsapi
+
+    await _setup(hass)
+    client = await hass_ws_client(hass)
+    monkeypatch.setattr(wsapi, "MAX_PLANS_FILES", 2)
+
+    await _upload(client, "q1", b"one")
+    await _upload(client, "q1", b"two")
+
+    import base64
+
+    await client.send_json_auto_id({
+        "type": "houseplan/plan/set", "space_id": "q1", "ext": "png",
+        "data": base64.b64encode(b"three").decode(),
+    })
+    resp = await client.receive_json()
+    assert not resp["success"] and resp["error"]["code"] == "too_many_files"