feat: mobile-optimized kitty config, Xpra HTML5 tuning, higher DPI

- Kitty font 16pt, hide decorations, bottom tab bar, touch-friendly
- Xpra DPI 144, min-quality 80 for crisp text
- HTML5 client: floating menu enabled, swap keys for touch
- Natural scrolling for mobile devices

config/xpra-html5-settings.txt

@@ -0,0 +1,17 @@
+# kitty-web mobile-optimized Xpra HTML5 settings
+
+# Block telemetry
+blocked-hosts = xpra.org,www.xpra.org
+
+# Quality - prefer sharpness for text
+min-quality = 80
+min-speed = 80
+
+# Swap scroll direction for touch devices (natural scrolling)
+swap_keys = true
+
+# Floating menu enabled by default (has keyboard toggle, fullscreen, etc.)
+floating_menu = true
+
+# Encoding - prefer tight/PNG for crisp text rendering
+encoding = auto