From 1d3619c241059c3b7405498869d435835a1ed4fc Mon Sep 17 00:00:00 2001
From: Peter Stone <thepeterstone@gmail.com>
Date: Mon, 4 May 2026 08:37:48 -1000
Subject: feat: past tracks layer toggle + persist vessel/crew registry
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Layers menu:
- Add "Past tracks" switch to layer picker sheet — hides/shows previous
  voyage polylines on the map, persisted across sessions via SharedPrefs

Vessel/crew registry:
- VesselRepository now takes a Context and persists all vessels and crew
  to SharedPreferences as JSON (Moshi, same pattern as BoatProfileRepository)
- Wire VesselRepository as a singleton in NavApplication so the Fragment
  and ViewModel share one instance — previously each created its own empty repo

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 .../main/res/layout/layout_layer_picker_sheet.xml  | 35 ++++++++++++++++++++++
 1 file changed, 35 insertions(+)

(limited to 'android-app/app/src/main/res/layout')

diff --git a/android-app/app/src/main/res/layout/layout_layer_picker_sheet.xml b/android-app/app/src/main/res/layout/layout_layer_picker_sheet.xml
index fdfbb7a..2e6f982 100644
--- a/android-app/app/src/main/res/layout/layout_layer_picker_sheet.xml
+++ b/android-app/app/src/main/res/layout/layout_layer_picker_sheet.xml
@@ -141,6 +141,41 @@
 
         </LinearLayout>
 
+        <!-- Past tracks toggle -->
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:gravity="center_vertical"
+            android:layout_marginTop="4dp"
+            android:layout_marginBottom="8dp">
+
+            <LinearLayout
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:orientation="vertical">
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Past tracks"
+                    android:textSize="15sp"
+                    android:textColor="@color/instrument_text_normal" />
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Show previous voyages on map"
+                    android:textSize="12sp"
+                    android:textColor="@color/instrument_text_secondary" />
+            </LinearLayout>
+
+            <com.google.android.material.switchmaterial.SwitchMaterial
+                android:id="@+id/switch_past_tracks"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content" />
+
+        </LinearLayout>
+
         <!-- ── UNITS ───────────────────────────────────────────────── -->
 
         <View
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