功能：完善2K串流、显示恢复与输入优化

tools/stream-motion-test.html

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+<!doctype html>
+<meta charset="utf-8">
+<title>VDI stream motion test</title>
+<style>
+  html, body { margin: 0; overflow: hidden; background: #101827; color: white; font: 24px monospace; }
+  canvas { display: block; width: 100vw; height: 100vh; }
+  #stats { position: fixed; right: 24px; top: 20px; background: #000c; padding: 12px; }
+</style>
+<canvas id="scene"></canvas><div id="stats"></div>
+<script>
+// Deterministic moving bars + checkerboard: creates continuous desktop damage.
+// Read the source RAF rate separately from the Moonlight stream/render rate.
+const canvas = document.getElementById('scene');
+const context = canvas.getContext('2d', { alpha: false });
+const stats = document.getElementById('stats');
+let count = 0, last = performance.now(), sourceFps = 0;
+function render(now) {
+  if (canvas.width !== innerWidth || canvas.height !== innerHeight) {
+    canvas.width = innerWidth; canvas.height = innerHeight;
+  }
+  const width = canvas.width, height = canvas.height;
+  context.fillStyle = '#101827'; context.fillRect(0, 0, width, height);
+  const offset = Math.floor(now * 0.12) % 128;
+  for (let y = height / 2; y < height; y += 128) {
+    for (let x = -128; x < width; x += 128) {
+      context.fillStyle = (Math.round((x + 128) / 128) + Math.floor(y / 128)) % 2 ? '#28517a' : '#132c46';
+      context.fillRect(x + offset, y, 126, 126);
+    }
+  }
+  const x = (now * 0.6) % (width + 100) - 100;
+  context.fillStyle = '#ffcf40'; context.fillRect(x, 0, 80, height);
+  context.fillStyle = '#ffffff'; context.fillRect(width - x, 0, 8, height);
+  count++;
+  if (now - last >= 1000) { sourceFps = count * 1000 / (now - last); count = 0; last = now; }
+  stats.textContent = `${width}x${height} | source RAF ${sourceFps.toFixed(1)} FPS | ${Math.floor(now)} ms`;
+  requestAnimationFrame(render);
+}
+requestAnimationFrame(render);
+</script>