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
---
 android-app/app/src/main/res/layout/activity_main.xml | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

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

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"
-- 
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