Add Learn tab; move quit to Safety; remove persistent MOB FAB

UI cleanup:
- Remove always-visible MOB FAB — Safety screen button is sufficient
- Remove floating quit button; move to bottom of Safety screen
- fragment_container is now clickable/focusable, blocking map touch-through
  for all overlays (trip reports, log, safety)
- Record Track FAB hidden while any overlay is shown, visible on map tab

New Learn tab (5th nav item):
- Migration guides for Navionics and Sea People (local markdown via DocFragment)
- ASA Course Catalog, ASA Online Learning, ColRegs, Sailing Flashcards
  (open in browser)
- Remove blanket assets/ .gitignore so markdown docs are tracked

https://claude.ai/code/session_01HXPjBsogsJVRwCiekDGkJX

5 files changed, 261 insertions, 33 deletions

diff --git a/android-app/app/src/main/res/drawable/ic_learn.xml b/android-app/app/src/main/res/drawable/ic_learn.xml
new file mode 100644
index 0000000..1574693
--- /dev/null
+++ b/android-app/app/src/main/res/drawable/ic_learn.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M12,3L1,9l11,6 9-4.91V17h2V9L12,3zM5,13.18v4L12,21l7-3.82v-4L12,17l-7-3.82z"/>
+</vector>
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 5943949..1bb88b3 100644
--- a/android-app/app/src/main/res/layout/activity_main.xml
+++ b/android-app/app/src/main/res/layout/activity_main.xml
@@ -59,26 +59,10 @@
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
                 android:visibility="gone"
+                android:clickable="true"
+                android:focusable="true"
                 android:background="?attr/colorSurface" />
 
-            <!-- Quit button — stops all services and exits -->
-            <com.google.android.material.button.MaterialButton
-                android:id="@+id/btn_quit"
-                style="@style/Widget.Material3.Button.IconButton.Filled.Tonal"
-                android:layout_width="40dp"
-                android:layout_height="40dp"
-                android:alpha="0.7"
-                app:icon="@drawable/ic_close"
-                app:iconSize="18dp"
-                app:iconGravity="textStart"
-                app:iconPadding="0dp"
-                app:cornerRadius="20dp"
-                app:elevation="4dp"
-                app:layout_constraintTop_toTopOf="parent"
-                app:layout_constraintEnd_toEndOf="parent"
-                android:layout_marginTop="16dp"
-                android:layout_marginEnd="16dp" />
-
             <com.google.android.material.button.MaterialButton
                 android:id="@+id/fab_recenter"
                 android:layout_width="wrap_content"
@@ -115,21 +99,6 @@
 
         </androidx.cardview.widget.CardView>
 
-        <!-- Persistent MOB Button (Crucial for safety, always on top) -->
-        <com.google.android.material.floatingactionbutton.FloatingActionButton
-            android:id="@+id/fab_mob"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_margin="16dp"
-            android:clickable="true"
-            android:focusable="true"
-            android:contentDescription="Man Overboard"
-            app:srcCompat="@android:drawable/ic_dialog_alert"
-            app:backgroundTint="@color/mob_button_background"
-            app:elevation="20dp"
-            app:layout_anchor="@id/instrument_bottom_sheet"
-            app:layout_anchorGravity="top|start" />
-
         <!-- Record Track Button -->
         <com.google.android.material.floatingactionbutton.FloatingActionButton
             android:id="@+id/fab_record_track"
diff --git a/android-app/app/src/main/res/layout/fragment_learn.xml b/android-app/app/src/main/res/layout/fragment_learn.xml
new file mode 100644
index 0000000..f41e577
--- /dev/null
+++ b/android-app/app/src/main/res/layout/fragment_learn.xml
@@ -0,0 +1,235 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView
+    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">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Learn"
+            android:textSize="24sp"
+            android:textStyle="bold"
+            android:textColor="?attr/colorOnSurface"
+            android:layout_marginBottom="24dp" />
+
+        <!-- ── Migration Guides ─────────────────────────────────────── -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="MIGRATION GUIDES"
+            android:textSize="11sp"
+            android:textAllCaps="true"
+            android:letterSpacing="0.12"
+            android:textColor="?attr/colorOnSurfaceVariant"
+            android:layout_marginBottom="8dp" />
+
+        <com.google.android.material.card.MaterialCardView
+            android:id="@+id/card_migrate_navionics"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="8dp"
+            app:cardCornerRadius="12dp"
+            app:cardElevation="2dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal"
+                android:padding="16dp"
+                android:gravity="center_vertical">
+
+                <TextView
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:text="Migrating from Navionics"
+                    android:textAppearance="?attr/textAppearanceTitleSmall" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="›"
+                    android:textSize="20sp"
+                    android:textColor="?attr/colorOnSurfaceVariant" />
+
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
+        <com.google.android.material.card.MaterialCardView
+            android:id="@+id/card_migrate_seapeople"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="24dp"
+            app:cardCornerRadius="12dp"
+            app:cardElevation="2dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal"
+                android:padding="16dp"
+                android:gravity="center_vertical">
+
+                <TextView
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:text="Migrating from Sea People"
+                    android:textAppearance="?attr/textAppearanceTitleSmall" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="›"
+                    android:textSize="20sp"
+                    android:textColor="?attr/colorOnSurfaceVariant" />
+
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
+        <!-- ── ASA Training & Practice ──────────────────────────────── -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="ASA TRAINING &amp; PRACTICE"
+            android:textSize="11sp"
+            android:textAllCaps="true"
+            android:letterSpacing="0.12"
+            android:textColor="?attr/colorOnSurfaceVariant"
+            android:layout_marginBottom="8dp" />
+
+        <com.google.android.material.card.MaterialCardView
+            android:id="@+id/card_asa_courses"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="8dp"
+            app:cardCornerRadius="12dp"
+            app:cardElevation="2dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:padding="16dp">
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="ASA Course Catalog"
+                    android:textAppearance="?attr/textAppearanceTitleSmall" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="ASA 101–114: keelboat through offshore passagemaking"
+                    android:textSize="12sp"
+                    android:textColor="?attr/colorOnSurfaceVariant"
+                    android:layout_marginTop="2dp" />
+
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
+        <com.google.android.material.card.MaterialCardView
+            android:id="@+id/card_asa_online"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="8dp"
+            app:cardCornerRadius="12dp"
+            app:cardElevation="2dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:padding="16dp">
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="ASA Online Learning"
+                    android:textAppearance="?attr/textAppearanceTitleSmall" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Self-paced online courses and study guides"
+                    android:textSize="12sp"
+                    android:textColor="?attr/colorOnSurfaceVariant"
+                    android:layout_marginTop="2dp" />
+
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
+        <com.google.android.material.card.MaterialCardView
+            android:id="@+id/card_colregs"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="8dp"
+            app:cardCornerRadius="12dp"
+            app:cardElevation="2dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:padding="16dp">
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="ColRegs — Rules of the Road"
+                    android:textAppearance="?attr/textAppearanceTitleSmall" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="USCG international collision regulations reference"
+                    android:textSize="12sp"
+                    android:textColor="?attr/colorOnSurfaceVariant"
+                    android:layout_marginTop="2dp" />
+
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
+        <com.google.android.material.card.MaterialCardView
+            android:id="@+id/card_flashcards"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="8dp"
+            app:cardCornerRadius="12dp"
+            app:cardElevation="2dp">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical"
+                android:padding="16dp">
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Sailing Flashcards"
+                    android:textAppearance="?attr/textAppearanceTitleSmall" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Quizlet decks for knots, rules, lights &amp; signals"
+                    android:textSize="12sp"
+                    android:textColor="?attr/colorOnSurfaceVariant"
+                    android:layout_marginTop="2dp" />
+
+            </LinearLayout>
+        </com.google.android.material.card.MaterialCardView>
+
+    </LinearLayout>
+</ScrollView>
diff --git a/android-app/app/src/main/res/layout/fragment_safety.xml b/android-app/app/src/main/res/layout/fragment_safety.xml
index f90420e..60ea1aa 100644
--- a/android-app/app/src/main/res/layout/fragment_safety.xml
+++ b/android-app/app/src/main/res/layout/fragment_safety.xml
@@ -113,4 +113,15 @@
         android:text="PLAN TRIP (PRE-TRIP REPORT)"
         app:layout_constraintTop_toBottomOf="@id/card_anchor" />
 
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/button_quit"
+        style="@style/Widget.Material3.Button.TextButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Quit"
+        android:textColor="?attr/colorOnSurfaceVariant"
+        app:icon="@drawable/ic_close"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/android-app/app/src/main/res/menu/bottom_nav_menu.xml b/android-app/app/src/main/res/menu/bottom_nav_menu.xml
index e7fc15d..3037b7e 100644
--- a/android-app/app/src/main/res/menu/bottom_nav_menu.xml
+++ b/android-app/app/src/main/res/menu/bottom_nav_menu.xml
@@ -16,4 +16,8 @@
         android:id="@+id/nav_safety"
         android:icon="@drawable/ic_safety"
         android:title="Safety" />
+    <item
+        android:id="@+id/nav_learn"
+        android:icon="@drawable/ic_learn"
+        android:title="Learn" />
 </menu>