The main timeline is the only time control; the Weather panel shows its frame time

The Weather panel kept a second time transport of its own: a slider, step
buttons, Latest and Play, backed by a replay in the weather clock that
stepped the observed frames every two seconds and went round from the last
to the first. The weather clock also attached itself to the world clock as
a driver, so the timeline's Play became that replay whenever weather was on.

The panel now shows the frame time only: the newest frame and its age while
live, the timeline time alone at a past time. The weather clock no longer
has setTarget, step, latest, play, pause or togglePlay, its state no longer
has playing, and it no longer drives the world clock. It still follows the
world time, registers each product's frames as marks the timeline's arrow
keys step to, holds its products, and gates the world's continuous play at
each next frame until it loads. weatherClock.world names the world clock it
follows.

A weather row's play, latest and step params move the world clock as the
timeline does: play toggles continuous play (from the start of the covered
time when live), latest goes live, and step goes to the previous or next
mark. The rail timeline component, which only the panel used, is removed,
along with its unused messages in every locale.

docs/CURRENT-STATE.md

@@ -8532,9 +8532,10 @@ Wind supports selectable GFS/IFS models with persisted model choice. Each fetch
 Weather combines the GFS/ECMWF surface forecast with three observation layers:
 NOAA Rain radar (CONUS), Satellite clouds (regional GOES or slower global infrared),
 and 15-minute lightning density (Americas and Pacific). One transient observed
-clock drives all enabled observation rows. Earlier/Later use the sorted union of
-non-suspended products' advertised times; each product selects its nearest frame
-at or before the requested UTC time, never a future frame or an interpolation.
+clock moves all enabled observation rows with the world clock; the world
+timeline is the only time control. Each product's advertised times are marks on
+that timeline, which its arrow keys step to; each product selects its nearest
+frame at or before the world time, never a future frame or an interpolation.
 The maximum gap is 30 minutes for radar, regional infrared and lightning, and
 3 hours for hourly global infrared, but never less than one and a half of the
 feed's median frame spacing over its latest frames, so a regional feed whose
@@ -8544,16 +8545,23 @@ lightning, 4 hours for global infrared). A missing eligible frame hides that pro
 and reports the gap; rows show actual displayed UTC time with synced/nearest labels.
 Manifest rollover preserves the requested history time, even when frames expire.
 
-Latest follows each product's own newest frame, so its timestamps can differ.
-Playback advances two seconds after all products settle, wraps, and stops with
-fewer than two union times or when all products are suspended. Hidden documents,
-reduced motion and unavailable imagery hosts suspend products. Re-enabling or
+Live follows each product's own newest frame, so its timestamps can differ.
+The timeline's Play runs the world clock at the chosen speed and stops at each
+product's next frame until that frame loads (for at most eight seconds), so
+every frame shows. Hidden documents, reduced motion and unavailable imagery
+hosts suspend products. Re-enabling or
 restoring a host joins the retained history target. The wind row explicitly says
 “Forecast · does not follow history” while the observed clock is in history mode.
-The catalog exposes `weatherClock` and destroys it with its lifetime signal.
+The Weather panel's frame time shows the newest frame and its age while live,
+and the timeline time alone at a past time.
+The catalog exposes `weatherClock` and destroys it with its lifetime signal. It
+has no time controls of its own: `weatherClock.world` is the world clock it
+follows, where time moves. A weather row's `play`, `latest` and `step` params
+move that world clock as the timeline does.
 
-Source, opacity, coverage navigation and transport controls live in the WEATHER
-panel's cards and timeline, not in the rows. The viewer clock is untouched.
+Source, opacity and coverage navigation live in the WEATHER panel's cards, not
+in the rows; the panel shows the frame time and has no time controls. The
+viewer clock is untouched.
 Observation layers are off by default; share/persist includes appearance and product, while history
 is transient and shared links open latest. Rendering retains the previous frame
 when an incoming frame fails; no eligible historical frame instead hides imagery.