Main-screen recordings list, player actions, background recording, exports (1.4.0-alpha)

- Main screen: recordings list at the bottom (newest first); removed the separate
  library screen and the top-right link
- Player: delete/rename/share/export, no autoplay, embedded-marker fallback
- Word-level tap-to-seek from Whisper token timestamps (length fallback)
- Export transcripts as .txt + .srt to Downloads
- RecordingService: microphone foreground service for background recording
- FileProvider for sharing on Android 9 and older
- StreamingResampler extracted to its own class + JUnit regression tests
- Bump to 1.4.0-alpha (versionCode 6)

1 files changed, 39 insertions, 0 deletions

diff --git a/app/src/main/res/layout/activity_player.xml b/app/src/main/res/layout/activity_player.xml
index 67f5284..6ba1190 100644
--- a/app/src/main/res/layout/activity_player.xml
+++ b/app/src/main/res/layout/activity_player.xml
@@ -76,6 +76,45 @@
         </LinearLayout>
 
         <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="6dp"
+            android:orientation="horizontal">
+
+            <Button
+                android:id="@+id/shareButton"
+                style="?android:attr/buttonBarButtonStyle"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="@string/action_share" />
+
+            <Button
+                android:id="@+id/renameButton"
+                style="?android:attr/buttonBarButtonStyle"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="@string/action_rename" />
+
+            <Button
+                android:id="@+id/exportButton"
+                style="?android:attr/buttonBarButtonStyle"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="@string/action_export" />
+
+            <Button
+                android:id="@+id/deleteButton"
+                style="?android:attr/buttonBarButtonStyle"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="@string/action_delete" />
+        </LinearLayout>
+
+        <LinearLayout
             android:id="@+id/markersSection"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"