行情区：现价标签固定于价格轴，K线右侧保留10根留白

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

manual_trading_hub/static/chart.js

@@ -196,52 +196,6 @@
     if (elBarCountdown) elBarCountdown.textContent = "距收盘 " + cd;
   }
 
-  function getBarSpacing(ts) {
-    if (!ts) return 6;
-    try {
-      if (typeof ts.barSpacing === "function") {
-        const v = ts.barSpacing();
-        if (Number.isFinite(v) && v > 0) return v;
-      }
-    } catch (e) {}
-    try {
-      if (typeof ts.options === "function") {
-        const opts = ts.options();
-        const v = opts && opts.barSpacing;
-        if (Number.isFinite(v) && v > 0) return v;
-      }
-    } catch (e) {}
-    try {
-      const x0 = ts.logicalToCoordinate(0);
-      const x1 = ts.logicalToCoordinate(1);
-      if (x0 != null && x1 != null) {
-        const d = Math.abs(x1 - x0);
-        if (Number.isFinite(d) && d > 0) return d;
-      }
-    } catch (e) {}
-    return 6;
-  }
-
-  function plotAreaWidth() {
-    if (!chart) return chartHost.clientWidth || 0;
-    const ts = chart.timeScale();
-    try {
-      if (typeof ts.width === "function") {
-        const w = ts.width();
-        if (Number.isFinite(w) && w > 0) return w;
-      }
-    } catch (e) {}
-    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() {
     if (!elPriceTag || !candleSeries || !chart) return;
     try {
@@ -258,10 +212,8 @@
       } catch (e) {
         y = null;
       }
-      const x = priceTagX();
       const hostH = chartHost.clientHeight || 0;
-      const hostW = chartHost.clientWidth || 0;
-      if (y == null || x == null || y < 8 || y > hostH - 8 || x < 8 || x > hostW - 8) {
+      if (y == null || y < 8 || y > hostH - 8) {
         elPriceTag.classList.add("hidden");
         elPriceTag.setAttribute("aria-hidden", "true");
         return;
@@ -270,8 +222,8 @@
       elPriceTag.classList.remove("hidden", "is-up", "is-down");
       elPriceTag.classList.add(up ? "is-up" : "is-down");
       elPriceTag.setAttribute("aria-hidden", "false");
-      elPriceTag.style.left = x + "px";
-      elPriceTag.style.right = "auto";
+      elPriceTag.style.left = "auto";
+      elPriceTag.style.right = "0";
       elPriceTag.style.top = y + "px";
       if (elPriceTagValue) elPriceTagValue.textContent = fmtPrice(bar.close);
     } catch (e) {