功能：支持真实 2K 串流与重启持久化并优化渲染

变更详情：真2K串流与重启持久化，优化客户端渲染和帧率配置

三端统一2560x1440，盒子使用297MHz HDMI时序并保留1080p回退；Windows脚本动态定位VDD恢复2K。串流默认2K20/30Mbps，使用GLES2，设置页支持20/24FPS及自定义值。保持Windows正常光标，记录NVENC阶段性实测和GPU重启后Code43未恢复的限制。

terminal/kiosk-shell/scripts/vdi-kiosk-start

@@ -0,0 +1,28 @@
+#!/bin/sh
+
+export DISPLAY="${DISPLAY:-:0}"
+export XAUTHORITY="${XAUTHORITY:-/home/armbian/.Xauthority}"
+
+# Match the local output to the 2K Moonlight stream.
+# This kernel rejects the monitor's 241.70 MHz timing but accepts the 297 MHz
+# PLL rate. Longer vertical blanking produces 2560x1440 at approximately 60 Hz.
+# HDMI can appear a few seconds after the desktop autostart entry runs.
+: >/tmp/vdi-display-mode.log
+mode="2560x1440_60_fixed297"
+for _ in $(seq 1 20); do
+    if xrandr --query 2>>/tmp/vdi-display-mode.log | grep -q '^HDMI-1 connected'; then
+        xrandr --newmode "$mode" 297.00 \
+            2560 2608 2640 2720 1440 1443 1448 1820 \
+            +HSync -VSync >>/tmp/vdi-display-mode.log 2>&1 || true
+        xrandr --addmode HDMI-1 "$mode" >>/tmp/vdi-display-mode.log 2>&1 || true
+        if xrandr --output HDMI-1 --mode "$mode" >>/tmp/vdi-display-mode.log 2>&1; then
+            break
+        fi
+        xrandr --output HDMI-1 --mode 1920x1080 --rate 60 \
+            >>/tmp/vdi-display-mode.log 2>&1 || true
+    fi
+    sleep 1
+done
+
+exec /home/armbian/vdi-terminal/bin/vdi-kiosk-monitor -- \
+    /home/armbian/vdi-terminal/bin/kiosk-shell