diff --git a/viewer/src/main.rs b/viewer/src/main.rs
index 2a1103e..ac39c1f 100644
--- a/viewer/src/main.rs
+++ b/viewer/src/main.rs
@@ -362,7 +362,7 @@ fn session(
     };
 
     let mut window = Window::new(
-        "mvp-remote viewer (Esc 退出)",
+        "mvp-remote v0.6-HUD (Esc 退出)",
         w,
         h,
         WindowOptions {
@@ -471,7 +471,8 @@ fn session(
             }
         }
 
-        // 6) HUD：每秒刷新一次指标，画在右上角
+        // 6) HUD：指标每秒刷新一次；每秒至少强制呈现一次（视频冻结/黑屏时 HUD 依然可见）
+        let mut need_present = dirty;
         let (hud_loss, hud_jit, hud_p95, hud_dec);
         if hud_last.elapsed() >= Duration::from_secs(1) {
             let f = stats.frames.load(Ordering::Relaxed);
@@ -494,13 +495,14 @@ fn session(
             hud_p95 = stats.gap_p95();
             hud_dec = stats.dec_fail.load(Ordering::Relaxed);
             hud_last = Instant::now();
+            need_present = true; // HUD 面板每秒至少重绘一次
         } else {
             hud_loss = f64::NAN;
             hud_jit = 0;
             hud_p95 = None;
             hud_dec = 0;
         }
-        if dirty {
+        if need_present {
             let rtt = stats.rtt.load(Ordering::Relaxed);
             let e2e = stats.e2e.load(Ordering::Relaxed);
             let e2e_ok = stats.e2e_valid.load(Ordering::Relaxed);