Persist log entries and photos; stamp with GPS location

- LogbookStorage: Moshi-backed JSON persistence to getExternalFilesDir,
  photos saved to Pictures/Nav/ instead of cache
- LogbookRepository: file-backed replacement for in-memory store, loads
  saved entries on init so they survive app restarts
- VoiceLogViewModel: expose entries StateFlow, accept lat/lon in save()
- VoiceLogFragment: switch camera to TakePicture(Uri) via FileProvider for
  full-res photos; gallery copies content URI to persistent storage;
  passes current GPS position to save(); shows scrollable entries list
- MainViewModel: expose currentPosition StateFlow updated on each GPS fix
- AndroidManifest: add FileProvider for Pictures/Nav/ directory
- TripReportViewModel: updated to use LogbookRepository

https://claude.ai/code/session_01YUbuZNDAoLea4cf9UGQ9qn

2 files changed, 78 insertions, 0 deletions

diff --git a/android-app/app/src/main/res/layout/fragment_voice_log.xml b/android-app/app/src/main/res/layout/fragment_voice_log.xml
index 389add1..4a2ff14 100644
--- a/android-app/app/src/main/res/layout/fragment_voice_log.xml
+++ b/android-app/app/src/main/res/layout/fragment_voice_log.xml
@@ -160,6 +160,34 @@
         </LinearLayout>
         <!-- end layout_log_entry -->
 
+        <!-- ── Log entries section ── -->
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Log Entries"
+            android:textSize="13sp"
+            android:textAllCaps="true"
+            android:letterSpacing="0.08"
+            android:textColor="?attr/colorOnSurfaceVariant"
+            android:layout_marginBottom="8dp" />
+
+        <TextView
+            android:id="@+id/tv_no_log_entries"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="No log entries yet."
+            android:textColor="?attr/colorOnSurfaceVariant"
+            android:layout_marginBottom="8dp"
+            android:visibility="visible" />
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/rv_log_entries"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:nestedScrollingEnabled="false"
+            android:clipToPadding="false"
+            android:layout_marginBottom="16dp" />
+
         <!-- Generate Trip Report — always accessible -->
         <com.google.android.material.button.MaterialButton
             android:id="@+id/btn_generate_report"
diff --git a/android-app/app/src/main/res/layout/item_logbook_entry.xml b/android-app/app/src/main/res/layout/item_logbook_entry.xml
new file mode 100644
index 0000000..10cec4a
--- /dev/null
+++ b/android-app/app/src/main/res/layout/item_logbook_entry.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="horizontal"
+    android:padding="12dp"
+    android:gravity="center_vertical"
+    android:background="?attr/selectableItemBackground">
+
+    <ImageView
+        android:id="@+id/iv_logbook_photo"
+        android:layout_width="64dp"
+        android:layout_height="48dp"
+        android:scaleType="centerCrop"
+        android:layout_marginEnd="12dp"
+        android:contentDescription="Log photo"
+        android:visibility="gone" />
+
+    <LinearLayout
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/tv_logbook_timestamp"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textSize="12sp"
+            android:textColor="?attr/colorOnSurfaceVariant" />
+
+        <TextView
+            android:id="@+id/tv_logbook_text"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textSize="14sp"
+            android:layout_marginTop="2dp" />
+
+        <TextView
+            android:id="@+id/tv_logbook_location"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textSize="12sp"
+            android:textColor="?attr/colorOnSurfaceVariant"
+            android:layout_marginTop="2dp"
+            android:visibility="gone" />
+
+    </LinearLayout>
+
+</LinearLayout>