feat: add voice log UI with FAB, fragment container, and logbook domain models

- Add VoiceLogFragment, VoiceLogViewModel, VoiceLogState, LogEntry, InMemoryLogbookRepository
- Wire voice log FAB in MainActivity to show/hide fragment container
- Add RECORD_AUDIO permission to manifest
- Add native CMakeLists.txt and native-lib.cpp stubs
- Fix missing BufferOverflow import in LocationService

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/android-app/app/src/main/res/layout/activity_main.xml b/android-app/app/src/main/res/layout/activity_main.xml
index eb2ed3d..54ad0cd 100644
--- a/android-app/app/src/main/res/layout/activity_main.xml
+++ b/android-app/app/src/main/res/layout/activity_main.xml
@@ -514,4 +514,29 @@
 
     </androidx.constraintlayout.widget.ConstraintLayout>
 
+    <!-- Voice Log FAB -->
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/fab_voice_log"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp"
+        android:clickable="true"
+        android:focusable="true"
+        android:contentDescription="Open Voice Log"
+        android:src="@android:drawable/ic_btn_speak_now"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintBottom_toTopOf="@+id/fab_tidal" />
+
+    <!-- Voice Log Fragment Container -->
+    <FrameLayout
+        android:id="@+id/voice_log_container"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@android:color/white"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file