Street Level: a landed link, a replaced photo and a retired lookup keep their state

- A link's photo step compares with the navigation token its own restore
  flight owned, so a navigation after the flight landed (while the layers
  still load) keeps the camera.
- A request that switches the source keeps the open photo up until it is
  replaced (holdViewer), so EXPAND stays across sources.
- A lookup given up while it looked leaves the open photo and the panel as
  they were, also when it found nothing or failed.
- A failed replacement shows its error inside the expanded viewer.
- A replacing lookup stops a playing Mapillary sequence before the found
  photo opens.
- The action refuses coordinates outside the globe, keeps a name given with
  coordinates as its label, and fly: false keeps the camera only for
  coordinates (its test-only entity and query branches are gone).
- Numbered entities carry their label; a view's street-level point is a pair.
- Mapillary's nearest search always asks for 50 m and 100 images.
- Tests: the lifecycle reproductions, PLAY on replacement, out-of-range
  coordinates, half a point, and the named label; three layer tests share
  enabledLayer; the second payload digest is gone.
- Docs: the tool count, the panel freshness rule, armed: false, the photo
  replacement, the browser-gate comment and a shorter changelog fragment.

changelog.d/1113-show-street-level.md

@@ -1,40 +1,15 @@
 - "Show me X on Street View" (or on Mapillary, KartaView or Panoramax): a
   `show_street_level` voice and typed action flies to the place, switches to
   Google 3D when the source needs it, lights that source in Street Level,
-  turns the layer on and opens the nearest photo, reporting which step failed.
-  Views and share links carry the same request (`street_level`, `sl=`), so
-  `show_in_gods_eye_view` and a link can open a panorama at a place. Street
-  View lookups from a geocoded place search up to 250 m; clicks keep 50 m. A
-  plain link with `sl=google` arms Street View and leaves the billed load to a
-  press of OPEN GOOGLE STREET VIEW, which aims at the view centre again once
-  the visitor has moved more than 1 km away; embedded views open it, and the
-  God's Eye View panel only for a result issued in the last five minutes. On
-  a phone, a photo that opens or a link that arms opens the Cameras sheet;
-  in cockpit, clean view, recording or scene playback the action says the
-  panel is hidden instead of loading a photo nobody sees. Embedded photos
-  remain available over the clean globe. Mapillary's
-  nearest-photo search asks for 100 photos, so the nearest and the filter's
-  pick come from the spot's photos rather than an arbitrary eight. The source the
-  action lights stays lit like a chip click. An unavailable map stack now
-  reports the controller's own reason instead of always asking for a Cesium
-  ion token. When nothing is found and a 360°, flat or SINCE filter the source
-  honours is on, the answer names the filter. Cancelled lookups clear their
-  loading state over an existing photo and release their caller abort listeners.
-  Embedded photos show loading errors inside the overlay, and the OPEN prompt
-  uses the recipient's selected language. A link's photos never save its
-  layers as the recipient's preferences, and a link pasted into an open tab
-  opens or arms them too. With no place named, the action looks under the
-  screen centre as OPEN does; an armed OPEN aimed at the sky opens nothing; a
-  failing source is reported as an error, not as missing imagery; and
-  Mapillary's nearest search gives up after 12 seconds. On a phone the panel
-  scrolls into view, and in embed mode EXPAND stays open while cockpit,
-  recording and scene playback hide the photo. The action checks again after
-  every wait: a navigation or a drag of the globe, or a mode that hides the
-  panel, stops it before a photo loads for a place the user left or in a
-  panel nobody sees, also between finding a photo and loading it. A request
-  that finds nothing closes the previous photo, and one that finds a photo
-  replaces it in place, so EXPAND stays. A link whose restore flight the
-  visitor interrupted, or a posted view the user overtook, leaves their
-  camera and photo alone, and a photo found but not loaded keeps its error.
-  Mapillary's timeout message is translated. The panel's later results open a billed photo only when they are
-  fresh too (Said Turksever, @asturksever, #1113).
+  turns the layer on and opens the nearest photo, saying which step failed.
+  With no place named it looks under the screen centre, as OPEN does. Views
+  and share links carry the same request (`street_level`, `sl=`). A plain
+  `sl=google` link never loads a billed panorama by itself: it arms Street
+  View and leaves the load to OPEN GOOGLE STREET VIEW; embedded views open it,
+  and so does the God's Eye View panel for a result issued in the last five
+  minutes. A request stops when the user navigates or hides the panel before
+  its photo loads; a new photo replaces the open one in place, so EXPAND
+  stays. When nothing is found and a 360°, flat or SINCE filter is on, the
+  answer names the filter. An unavailable map stack now reports the
+  controller's own reason instead of always asking for a Cesium ion token
+  (Said Turksever, @asturksever, #1113).