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>

server/phobos-v6relay.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+"""IPv6 -> local IPv4 UDP relay for the obfuscator (it speaks IPv4 only).
+
+Usage: phobos-v6relay.py LISTEN_PORT [TARGET_PORT] [TARGET_HOST]
+One upstream socket per IPv6 client, so the obfuscator sees a stable
+client address for the whole session. Idle clients are dropped after 300 s.
+"""
+import selectors
+import socket
+import sys
+import time
+
+IDLE = 300
+
+listen_port = int(sys.argv[1])
+target = (sys.argv[3] if len(sys.argv) > 3 else "127.0.0.1",
+          int(sys.argv[2]) if len(sys.argv) > 2 else listen_port)
+
+down = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
+down.setsockopt(socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 1)
+down.bind(("::", listen_port))
+
+sel = selectors.DefaultSelector()
+sel.register(down, selectors.EVENT_READ, None)
+clients = {}   # v6 addr -> [upstream socket, last seen]
+
+while True:
+    for key, _ in sel.select(timeout=30):
+        if key.data is None:
+            data, addr = down.recvfrom(65535)
+            c = clients.get(addr)
+            if c is None:
+                up = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+                up.connect(target)
+                sel.register(up, selectors.EVENT_READ, addr)
+                c = clients[addr] = [up, 0]
+            c[1] = time.monotonic()
+            try:
+                c[0].send(data)
+            except OSError:
+                pass
+        else:
+            addr = key.data
+            try:
+                down.sendto(key.fileobj.recv(65535), addr)
+                clients[addr][1] = time.monotonic()
+            except OSError:
+                pass
+    now = time.monotonic()
+    for addr, (up, seen) in list(clients.items()):
+        if now - seen > IDLE:
+            sel.unregister(up)
+            up.close()
+            del clients[addr]