From 17cfd884976b4accbb2ad6af6acf3578d0c6ec53 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Wed, 3 Jun 2026 01:01:00 +0000
Subject: Add night vision mode toggle

Single-tap moon FAB (stacked below layers FAB) toggles red-on-black
night vision mode. NightVision theme now has a full M3 color palette
(surface, surfaceVariant, outline, secondary, error) all in dark red
tones. Screen brightness is set to 30% in night mode and restored to
system default on exit. State persists across sessions; recreate()
applies the theme switch cleanly.

https://claude.ai/code/session_01KXYBuAHZkvv63DeUG6XaZD
---
 .../app/src/main/res/drawable/ic_night_mode.xml    | 10 ++++++++
 .../app/src/main/res/layout/activity_main.xml      | 14 +++++++++++
 android-app/app/src/main/res/values/colors.xml     | 29 +++++++++++++++++-----
 android-app/app/src/main/res/values/themes.xml     | 26 ++++++++++++++++---
 4 files changed, 69 insertions(+), 10 deletions(-)
 create mode 100644 android-app/app/src/main/res/drawable/ic_night_mode.xml

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

diff --git a/android-app/app/src/main/res/drawable/ic_night_mode.xml b/android-app/app/src/main/res/drawable/ic_night_mode.xml
new file mode 100644
index 0000000..b19aeb7
--- /dev/null
+++ b/android-app/app/src/main/res/drawable/ic_night_mode.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<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="?attr/colorOnSurface"
+        android:pathData="M12,3c-4.97,0-9,4.03-9,9s4.03,9,9,9 9,-4.03 9,-9c0,-0.46-0.04,-0.92-0.1,-1.36-0.98,1.37-2.58,2.26-4.4,2.26-2.98,0-5.4,-2.42-5.4,-5.4 0,-1.81 0.89,-3.42 2.26,-4.4C13,3.04 12.54,3 12,3z"/>
+</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 6832daa..ca13105 100644
--- a/android-app/app/src/main/res/layout/activity_main.xml
+++ b/android-app/app/src/main/res/layout/activity_main.xml
@@ -53,6 +53,20 @@
                 app:layout_constraintTop_toBottomOf="@id/nav_hud"
                 app:layout_constraintEnd_toEndOf="parent" />
 
+            <!-- Night mode toggle FAB -->
+            <com.google.android.material.floatingactionbutton.FloatingActionButton
+                android:id="@+id/fab_night_mode"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="4dp"
+                android:layout_marginEnd="12dp"
+                android:contentDescription="Toggle night mode"
+                app:srcCompat="@drawable/ic_night_mode"
+                app:fabSize="mini"
+                app:elevation="8dp"
+                app:layout_constraintTop_toBottomOf="@id/fab_layers"
+                app:layout_constraintEnd_toEndOf="parent" />
+
             <!-- Crosshair — visible when not following (panning) -->
             <ImageView
                 android:id="@+id/map_crosshair"
diff --git a/android-app/app/src/main/res/values/colors.xml b/android-app/app/src/main/res/values/colors.xml
index c3b115c..5aefcae 100755
--- a/android-app/app/src/main/res/values/colors.xml
+++ b/android-app/app/src/main/res/values/colors.xml
@@ -56,11 +56,28 @@
     <color name="wave_shimmer">#50FFFFFF</color>
     <color name="wave_whitecap">#80FFFFFF</color>
 
-    <!-- Night Vision Mode (Stays Red) -->
-    <color name="night_red_primary">#FFFF0000</color>
-    <color name="night_red_variant">#FFBB0000</color>
-    <color name="night_on_red">#FF000000</color>
+    <!-- Night Vision Mode (red-on-black; preserves dark adaptation) -->
     <color name="night_background">#FF000000</color>
-    <color name="night_surface">#FF110000</color>
-    <color name="night_on_surface">#FFFF0000</color>
+    <color name="night_surface">#FF0F0000</color>
+    <color name="night_surface_variant">#FF1C0000</color>
+    <color name="night_surface_bright">#FF200000</color>
+
+    <color name="night_on_surface">#FFFF3300</color>
+    <color name="night_on_surface_variant">#FFCC2200</color>
+
+    <color name="night_outline">#FF3D0000</color>
+    <color name="night_outline_variant">#FF1F0000</color>
+
+    <color name="night_primary">#FFFF3300</color>
+    <color name="night_on_primary">#FF000000</color>
+    <color name="night_primary_container">#FF1C0000</color>
+    <color name="night_on_primary_container">#FFFF3300</color>
+
+    <color name="night_secondary">#FF881100</color>
+    <color name="night_on_secondary">#FF000000</color>
+    <color name="night_secondary_container">#FF1C0000</color>
+    <color name="night_on_secondary_container">#FFFF3300</color>
+
+    <color name="night_error">#FFFF6B6B</color>
+    <color name="night_on_error">#FF000000</color>
 </resources>
diff --git a/android-app/app/src/main/res/values/themes.xml b/android-app/app/src/main/res/values/themes.xml
index 93f5209..25af4e8 100755
--- a/android-app/app/src/main/res/values/themes.xml
+++ b/android-app/app/src/main/res/values/themes.xml
@@ -27,14 +27,32 @@
         <item name="android:windowLightStatusBar">false</item>
     </style>
 
-    <!-- Night Vision Theme (Stays Dark and Red) -->
-    <style name="Theme.Nav.NightVision" parent="Theme.Material3.DayNight.NoActionBar">
-        <item name="colorPrimary">@color/night_red_primary</item>
-        <item name="colorOnPrimary">@color/night_on_red</item>
+    <!-- Night Vision Theme (red-on-black; preserves dark adaptation) -->
+    <style name="Theme.Nav.NightVision" parent="Theme.Material3.Dark.NoActionBar">
+        <item name="colorPrimary">@color/night_primary</item>
+        <item name="colorOnPrimary">@color/night_on_primary</item>
+        <item name="colorPrimaryContainer">@color/night_primary_container</item>
+        <item name="colorOnPrimaryContainer">@color/night_on_primary_container</item>
+
+        <item name="colorSecondary">@color/night_secondary</item>
+        <item name="colorOnSecondary">@color/night_on_secondary</item>
+        <item name="colorSecondaryContainer">@color/night_secondary_container</item>
+        <item name="colorOnSecondaryContainer">@color/night_on_secondary_container</item>
+
         <item name="android:colorBackground">@color/night_background</item>
         <item name="colorSurface">@color/night_surface</item>
         <item name="colorOnSurface">@color/night_on_surface</item>
+        <item name="colorSurfaceVariant">@color/night_surface_variant</item>
+        <item name="colorOnSurfaceVariant">@color/night_on_surface_variant</item>
+
+        <item name="colorOutline">@color/night_outline</item>
+        <item name="colorOutlineVariant">@color/night_outline_variant</item>
+
+        <item name="colorError">@color/night_error</item>
+        <item name="colorOnError">@color/night_on_error</item>
+
         <item name="android:statusBarColor" tools:targetApi="l">@color/night_background</item>
+        <item name="android:navigationBarColor">@color/night_background</item>
         <item name="android:windowLightStatusBar">false</item>
     </style>
 
-- 
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