首页音量旋钮，不允许用户主动调节音量

client/src/pages/Home.tsx

@@ -609,25 +609,15 @@ export default function Home() {
               {/* Right knob */}
               <div className={cn("pr-4", volumePassthroughActive && "opacity-40 pointer-events-none")}>
                 <div
-                  className="w-12 h-12 rounded-full flex items-center justify-center touch-none select-none"
+                  className="w-12 h-12 rounded-full flex items-center justify-center select-none pointer-events-none"
                   style={{
                     background: "radial-gradient(circle at 35% 35%, #4a4a4e, #1a1a1c)",
                     border: "2px solid rgba(255,255,255,0.12)",
                     boxShadow: "inset 0 2px 4px rgba(0,0,0,0.5)",
                     transform: `rotate(${knobAngle}deg)`,
-                    transition: knobDraggingRef.current ? "none" : "transform 120ms ease-out",
+                    transition: "transform 120ms ease-out",
                   }}
-                  role="slider"
+                  aria-hidden="true"
-                  aria-label="Volume"
-                  aria-valuemin={0}
-                  aria-valuemax={200}
-                  aria-valuenow={localVol}
-                  aria-disabled={volumePassthroughActive}
-                  onPointerDown={beginKnobDrag}
-                  onPointerMove={moveKnobDrag}
-                  onPointerUp={endKnobDrag}
-                  onPointerCancel={endKnobDrag}
-                  onLostPointerCapture={lostKnobPointerCapture}
                 >
                   <div className="w-1 h-4 rounded-full bg-white/40" style={{ transform: "rotate(-30deg)", transformOrigin: "bottom center" }} />
                 </div>