fix(train): a recording's screen opens as it starts, and pages run on beneath the floating bar (ADR 0030, D21)

An indoor row started showed its notification but not its screen: the
Record tab's card pushed the screen only after the service had started,
and gave up silently where the card was gone by then. Train's frame now
opens it as the recording's phase turns to recording; one found running
as the app opens leaves the tabs as they were. The notification tapped
opens the recording's screen, not merely the app (RecordingOpenings.kt).

A workout's page kept a SafeArea at its foot, whose inset under the
floating bar is the bar itself: its content stopped at the bar's top, a
plain band behind it. It runs on beneath the bar as the tabs do, and the
tabs' lists and a day's page end with the body's bottom padding rather
than a fixed 88 px, which left their last item under the bar.

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

apps/train/halkyon_train_flutter/android/app/src/main/kotlin/app/halkyon/train/MainActivity.kt

@@ -33,17 +33,22 @@ class MainActivity : FlutterActivity() {
   /** Music from Jellyfin: the network, and the tempo of what is downloaded (ADR 0030, D47). */
   private val music by lazy { MusicBridge(this) }
 
+  /** The recording's notification tapped: the recording's screen (ADR 0030, D21). */
+  private val recordingOpenings = RecordingOpenings()
+
   override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
     health.onIntent(intent)
     // Not again where Android makes the activity anew with the same intent.
     if (savedInstanceState == null) files.onIntent(intent)
+    recordingOpenings.onIntent(intent)
   }
 
   override fun onNewIntent(intent: Intent) {
     super.onNewIntent(intent)
     health.onIntent(intent)
     files.onIntent(intent)
+    recordingOpenings.onIntent(intent)
   }
 
   @Deprecated("FlutterActivity has no result registry")
@@ -118,6 +123,8 @@ class MainActivity : FlutterActivity() {
     EventChannel(messenger, "app.halkyon.train/loop/search").setStreamHandler(loop.search)
     MethodChannel(messenger, "app.halkyon.train/files").setMethodCallHandler(files)
     EventChannel(messenger, "app.halkyon.train/files/opened").setStreamHandler(files.opened)
+    EventChannel(messenger, "app.halkyon.train/recorder/opened")
+      .setStreamHandler(recordingOpenings.opened)
     MethodChannel(messenger, "app.halkyon.train/music").setMethodCallHandler(music)
     EventChannel(messenger, "app.halkyon.train/music/fetched").setStreamHandler(music.fetched)
     EventChannel(messenger, "app.halkyon.train/recorder/lines").setStreamHandler(

apps/train/halkyon_train_flutter/android/app/src/main/kotlin/app/halkyon/train/RecorderService.kt

@@ -832,6 +832,8 @@ class RecorderService : Service(), LocationListener, SensorEventListener {
 
   private fun openApp(): PendingIntent? =
     packageManager.getLaunchIntentForPackage(packageName)?.let {
+      // Onto the recording's screen, not wherever the app was (D21).
+      it.putExtra(RecordingOpenings.EXTRA_OPEN_RECORDING, true)
       PendingIntent.getActivity(this, 0, it, PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT)
     }
 

apps/train/halkyon_train_flutter/android/app/src/main/kotlin/app/halkyon/train/RecordingOpenings.kt

@@ -0,0 +1,44 @@
+package app.halkyon.train
+
+import android.content.Intent
+import io.flutter.plugin.common.EventChannel
+
+/**
+ * The recording's notification tapped (ADR 0030, D21): the app opens on the
+ * recording's screen, not wherever it was. The tap is handed to the app as it
+ * listens (now, or once it does, after a cold start).
+ */
+class RecordingOpenings {
+  companion object {
+    /** The extra of the notification's intent that asks for the recording. */
+    const val EXTRA_OPEN_RECORDING = "app.halkyon.train.OPEN_RECORDING"
+  }
+
+  private var sink: EventChannel.EventSink? = null
+  private var waiting = false
+
+  val opened =
+    object : EventChannel.StreamHandler {
+      override fun onListen(arguments: Any?, events: EventChannel.EventSink) {
+        sink = events
+        if (waiting) {
+          waiting = false
+          events.success(null)
+        }
+      }
+
+      override fun onCancel(arguments: Any?) {
+        sink = null
+      }
+    }
+
+  /** Takes in [intent]'s ask for the recording, if it asks. */
+  fun onIntent(intent: Intent?) {
+    if (intent?.getBooleanExtra(EXTRA_OPEN_RECORDING, false) != true) {
+      return
+    }
+    // Asked once: the activity made anew with the same intent asks no more.
+    intent.removeExtra(EXTRA_OPEN_RECORDING)
+    sink?.success(null) ?: run { waiting = true }
+  }
+}