build(train): Train on the desktop as a snap, to the Store's edge channel with each release (ADR 0030, D62)

Built as Todo's in a clone of its own, from apps/train/snap/, for train.halkyon.eu; its
listing says the desktop shows, plans and keeps the statistics, and records nothing.
The snap tests now hold every snap built in a clone of its own.

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

@@ -1571,6 +1571,14 @@ Strava. What was found, 27 Oct:
     folder), newest first; over the newest alone. Nothing on a fresh install; a device
     used before (an instance chosen) is shown the running version's on its first start
     with this. In the app's language, else English.
+- **D62 Train on the desktop as a snap** (the developer's, 3 Nov 2026, on the agent's
+  recommendation): to the Snap Store's edge channel with each release, as Learn's and
+  Todo's, built as Todo's in a clone of its own (`apps/train/snap/`, Todo's ADR 0033,
+  step 5), for train.halkyon.eu. D58 had released the APK alone, before the release
+  tool could build a snap from an app's own folder. The desktop records nothing and
+  connects to no device (*Consequences*); it shows the workouts with their maps, plans
+  routes and strength sessions, and keeps the statistics, with what the phones
+  recorded coming through the server. Its listing says so.
 
 ## Consequences