release 1.5.0: one panel in all channels; Apple apps (iOS, new macOS tab) only in beta/dev

- stable gets the beta panel and server features (new design, presets, firewall,
  monthly traffic, router failover over all ports/addresses + TCP, altip, HR tab,
  Windows tab, update banner); ios/ macos/ windows/ sources stay out of stable
- menu item "Update to N" under Settings when a new version is out
- mobile: top menu no longer stretches to 200px
- urllib User-Agent: Cloudflare in front of git.bobyrev.com returns 403 to Python-urllib
- docs: GitHub adleibzon-rgb as source, password/uninstall/devices sections,
  new screenshots, PORTS.md TCP fallback and second IP

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

android-client/res/drawable/ic_vpn.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- monochrome shield for the status bar and the quick settings tile -->
+<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="#FFFFFFFF"
+        android:pathData="M12,2 L20,5 L20,11 C20,16 16.6,20.2 12,22 C7.4,20.2 4,16 4,11 L4,5 Z M10.5,8 h3 v8 h-3 z" />
+</vector>