release: 1.4.0 — one version for stable/beta/dev

Light/dark theme and compact mobile layout, per-client speed limit, real
speed tests, panel domain (Let's Encrypt), client address + cascade relay,
RKN scanner guard, WARP, backup/restore, router web terminal, Android VPN
client with split tunnelling and Android admin app. Updating from 1.2.x
keeps keys, server.env and clients; tested 1.2.8 -> 1.4.0 on live VMs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

android/AndroidManifest.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.pca.phobos"
+    android:versionCode="140"
+    android:versionName="1.4.0">
+
+    <uses-sdk android:minSdkVersion="23" android:targetSdkVersion="35" />
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <application
+        android:label="PCA Phobos"
+        android:icon="@drawable/ic_launcher"
+        android:theme="@style/AppTheme"
+        android:usesCleartextTraffic="true"
+        android:allowBackup="true">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:configChanges="orientation|screenSize|screenLayout|keyboardHidden|uiMode"
+            android:launchMode="singleTask">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>