feat(train): a recording under way above the bar on every tab, and a saved one opens its page (ADR 0030, D60)

halkyon_ui's NavigationFrame takes a status, standing above the floating
bar below medium windows and at the foot of the screen's panel from there
on. Train's RecordingBar fills it while a recording runs or waits to be
saved: its activity, moving time and distance, paused or stopped, a tap
back to it. Saving now opens the workout's page in Home's tab.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

docs/adr/0030-halkyon-train.md

@@ -1491,6 +1491,12 @@ Strava. What was found, 27 Oct:
   (31 Oct, the developer's), where an account sheet had held the account and the
   training's screens: grouped in cards, the training's screens first, the account near
   the foot, About Halkyon Train last and the version small below it.
+  A recording under way, left for another tab, stands above the bar on every tab
+  (below the rail's screen from medium windows on), as Strava's: its activity, its
+  moving time and distance, paused or stopped, a tap leading back to it
+  (`RecordingBar`, `NavigationFrame.status`); over the Record tab's button alone, which
+  had been the one way back. A workout just saved opens its page, in Home's tab, where
+  the recording had gone back to the tab it started from (both the developer's, 31 Oct).
 
 ## Consequences