行情区：现价标签固定于右侧10根留白区，倒计时在现价下方

Co-authored-by: Cursor <cursoragent@cursor.com>

manual_trading_hub/static/chart.js

@@ -183,8 +183,8 @@
       color: up ? "#00ff9d" : "#ff4d6d",
       lineWidth: 1,
       lineStyle: 2,
-      axisLabelVisible: true,
-      title: "现价",
+      axisLabelVisible: false,
+      title: "",
     });
   }
 
@@ -222,33 +222,24 @@
     return 6;
   }
 
-  function priceTagX() {
-    if (!chart || !lastCandles.length) return null;
-    const bar = latestCandle();
-    if (!bar) return null;
+  function plotAreaWidth() {
+    if (!chart) return chartHost.clientWidth || 0;
     const ts = chart.timeScale();
-    const spacing = getBarSpacing(ts);
-    const hostW = chartHost.clientWidth || 0;
-    let x = null;
     try {
-      const lastIdx = lastCandles.length - 1;
-      const lastX = ts.logicalToCoordinate(lastIdx);
-      if (lastX != null && Number.isFinite(lastX)) {
-        x = lastX + (RIGHT_OFFSET_BARS * spacing) / 2;
+      if (typeof ts.width === "function") {
+        const w = ts.width();
+        if (Number.isFinite(w) && w > 0) return w;
       }
     } catch (e) {}
-    if (x == null) {
-      try {
-        const tx = ts.timeToCoordinate(bar.time);
-        if (tx != null && Number.isFinite(tx)) {
-          x = tx + (RIGHT_OFFSET_BARS * spacing) / 2;
-        }
-      } catch (e2) {}
-    }
-    if (x == null && hostW > 0 && spacing > 0) {
-      x = hostW - (RIGHT_OFFSET_BARS * spacing) / 2;
-    }
-    return x;
+    return chartHost.clientWidth || 0;
+  }
+
+  /** 固定在右侧 10 根 K 线留白区中央，不随 K 线横向滚动 */
+  function priceTagX() {
+    const spacing = getBarSpacing(chart && chart.timeScale());
+    const plotW = plotAreaWidth();
+    if (plotW <= 0 || spacing <= 0) return null;
+    return plotW - (RIGHT_OFFSET_BARS * spacing) / 2;
   }
 
   function updatePriceTag() {
@@ -280,6 +271,7 @@
       elPriceTag.classList.add(up ? "is-up" : "is-down");
       elPriceTag.setAttribute("aria-hidden", "false");
       elPriceTag.style.left = x + "px";
+      elPriceTag.style.right = "auto";
       elPriceTag.style.top = y + "px";
       if (elPriceTagValue) elPriceTagValue.textContent = fmtPrice(bar.close);
     } catch (e) {