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.

src/styles.ts

@@ -383,6 +383,21 @@ export const cardStyles = css`
       gap: 0.25em;
       font-size: calc(1em * var(--rl-name, 1));
     }
+    /* Switching spaces by swipe or on the kiosk carousel: the plan flies out
+       the way the finger went and the next one arrives from the other side. */
+    @keyframes hp-slide-left {
+      0%   { transform: translateX(22%); opacity: 0; }
+      100% { transform: translateX(0);   opacity: 1; }
+    }
+    @keyframes hp-slide-right {
+      0%   { transform: translateX(-22%); opacity: 0; }
+      100% { transform: translateX(0);    opacity: 1; }
+    }
+    .zoomwrap.slide-left  { animation: hp-slide-left 0.26s cubic-bezier(0.22, 0.61, 0.36, 1); }
+    .zoomwrap.slide-right { animation: hp-slide-right 0.26s cubic-bezier(0.22, 0.61, 0.36, 1); }
+    @media (prefers-reduced-motion: reduce) {
+      .zoomwrap.slide-left, .zoomwrap.slide-right { animation: none; }
+    }
     .rlgearbtn {
       display: inline-flex;
       align-items: center;
@@ -402,7 +417,8 @@ export const cardStyles = css`
       opacity: 0.92;
       box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
     }
-    .rlgearbtn:hover { opacity: 1; }
+    .rlgearbtn { transition: opacity 0.15s, filter 0.15s; }
+    .rlgearbtn:hover { opacity: 1; filter: brightness(1.18); }
     .rlgearbtn ha-icon { --mdc-icon-size: 14px; display: inline-flex; }
     .rlgear {
       --mdc-icon-size: 0.9em;