feat: vessel registry, crew management, and thermal alarm

- Vessel/CrewMember data classes with full profile fields
  (MMSI, callsign, flag, home port, hull type, dimensions, roles)
- VesselRepository: in-memory CRUD for own vessel, fleet, and crew;
  getOwnVessel(), getSkipper(), getCrewByRole() helpers
- VesselRegistryFragment: own-vessel card + crew list + known-vessels
  list; AlertDialog editors for add/edit; long-press to delete
- ic_vessel.xml sailboat icon; 5th bottom-nav tab "Vessel"
- ThermalMonitor: thermalFlow() using Intent.ACTION_BATTERY_CHANGED
  (battery °C) + PowerManager.OnThermalStatusChangedListener (API 29+);
  ThermalState OK/WARM/HOT/CRITICAL with distinct-until-changed filter
- MainActivity: startThermalMonitoring() sounds mob_alarm + Toast on
  HOT (≥45°C) and CRITICAL (≥50°C); auto-silences on OK/WARM
- MainViewModel: thermalState and thermalReading StateFlows
- 18 VesselRepositoryTest cases — all GREEN (test-runner)
- design.md: updated competitive matrix + feature implementation status

https://claude.ai/code/session_011h2dXbgXg3PesQMmQUNTCW

1 files changed, 177 insertions, 0 deletions

diff --git a/android-app/app/src/main/res/layout/fragment_vessel_registry.xml b/android-app/app/src/main/res/layout/fragment_vessel_registry.xml
new file mode 100644
index 0000000..6b55fa6
--- /dev/null
+++ b/android-app/app/src/main/res/layout/fragment_vessel_registry.xml
@@ -0,0 +1,177 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.core.widget.NestedScrollView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="?attr/colorSurface">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="24dp">
+
+        <!-- Title row -->
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:gravity="center_vertical">
+
+            <TextView
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="Vessel Registry"
+                android:textSize="24sp"
+                android:textStyle="bold"
+                android:textColor="?attr/colorOnSurface" />
+
+        </LinearLayout>
+
+        <!-- OWN VESSEL card -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:layout_marginBottom="8dp"
+            android:text="OWN VESSEL"
+            android:textSize="12sp"
+            android:textStyle="bold"
+            android:letterSpacing="0.1"
+            android:textColor="?attr/colorPrimary" />
+
+        <com.google.android.material.card.MaterialCardView
+            android:id="@+id/card_own_vessel"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            app:cardCornerRadius="12dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:padding="16dp">
+
+                <TextView
+                    android:id="@+id/tv_own_vessel_name"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="No vessel configured"
+                    android:textSize="18sp"
+                    android:textStyle="bold"
+                    android:textColor="?attr/colorOnSurface" />
+
+                <TextView
+                    android:id="@+id/tv_own_vessel_details"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="4dp"
+                    android:text=""
+                    android:textSize="14sp"
+                    android:textColor="?attr/colorOnSurfaceVariant" />
+
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/button_edit_own_vessel"
+                    style="@style/Widget.Material3.Button.TonalButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="12dp"
+                    android:text="EDIT VESSEL" />
+
+            </LinearLayout>
+
+        </com.google.android.material.card.MaterialCardView>
+
+        <!-- CREW section -->
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:gravity="center_vertical"
+            android:layout_marginTop="24dp"
+            android:layout_marginBottom="8dp">
+
+            <TextView
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="CREW"
+                android:textSize="12sp"
+                android:textStyle="bold"
+                android:letterSpacing="0.1"
+                android:textColor="?attr/colorPrimary" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/button_add_crew"
+                style="@style/Widget.Material3.Button.TextButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="+ ADD" />
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/crew_list_container"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical" />
+
+        <TextView
+            android:id="@+id/tv_crew_empty"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="No crew members added yet."
+            android:textSize="14sp"
+            android:textColor="?attr/colorOnSurfaceVariant"
+            android:visibility="visible" />
+
+        <!-- FLEET section -->
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:gravity="center_vertical"
+            android:layout_marginTop="24dp"
+            android:layout_marginBottom="8dp">
+
+            <TextView
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="KNOWN VESSELS"
+                android:textSize="12sp"
+                android:textStyle="bold"
+                android:letterSpacing="0.1"
+                android:textColor="?attr/colorPrimary" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/button_add_vessel"
+                style="@style/Widget.Material3.Button.TextButton"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="+ ADD" />
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:id="@+id/vessel_list_container"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical" />
+
+        <TextView
+            android:id="@+id/tv_vessel_empty"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="No additional vessels recorded."
+            android:textSize="14sp"
+            android:textColor="?attr/colorOnSurfaceVariant"
+            android:visibility="visible" />
+
+    </LinearLayout>
+
+</androidx.core.widget.NestedScrollView>