Fix review chart markers to use containing bar time, not nearest open.

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

app/static/js/charts.js

@@ -1,6 +1,7 @@
-/** 复盘四周期：固定根数裁剪；进出场只用圆点，价签放在图外图例 */
+/** 复盘四周期：按「包含成交时刻」的 K 线落点，避免偏到下一根 */
 (function () {
   var TF_MAX = { M1: 500, M5: 200, M15: 100, H1: 50 };
+  var TF_SEC = { M1: 60, M5: 300, M15: 900, H1: 3600 };
 
   function num(v) {
     if (v == null || v === "") return null;
@@ -8,18 +9,23 @@
     return Number.isFinite(n) ? n : null;
   }
 
-  function nearestBarIndex(bars, ts) {
+  /** 找到覆盖 ts 的那根 K 线：barOpen <= ts < barOpen+period（最后一根含右边界） */
+  function barIndexAt(bars, ts, tf) {
     if (ts == null || !bars.length) return -1;
-    var best = 0;
-    var bestDiff = Math.abs(Number(bars[0].ts) - ts);
-    for (var i = 1; i < bars.length; i++) {
-      var d = Math.abs(Number(bars[i].ts) - ts);
-      if (d < bestDiff) {
-        bestDiff = d;
-        best = i;
+    var period = TF_SEC[tf] || 60;
+    var t = Number(ts);
+    var i;
+    for (i = 0; i < bars.length; i++) {
+      var open = Number(bars[i].ts);
+      var end = open + period;
+      var last = i === bars.length - 1;
+      if (t >= open && (t < end || (last && t <= end))) {
+        return i;
       }
     }
-    return best;
+    // 落在首根之前 / 末根之后：夹到边界
+    if (t < Number(bars[0].ts)) return 0;
+    return bars.length - 1;
   }
 
   function cropBars(bars, markers, tf) {
@@ -27,8 +33,9 @@
     var maxN = TF_MAX[tf] || 100;
     if (bars.length <= maxN) return bars;
 
-    var a = nearestBarIndex(bars, markers.openTs);
-    var b = markers.closeTs != null ? nearestBarIndex(bars, markers.closeTs) : a;
+    var a = barIndexAt(bars, markers.openTs, tf);
+    var b =
+      markers.closeTs != null ? barIndexAt(bars, markers.closeTs, tf) : a;
     if (a < 0) a = Math.floor(bars.length / 2);
     if (b < 0) b = a;
     var lo = Math.min(a, b);
@@ -41,6 +48,17 @@
     return bars.slice(start, end);
   }
 
+  function fmtBjt(ts) {
+    if (ts == null) return "";
+    var d = new Date(Number(ts) * 1000);
+    // 用 UTC+8 显示，与复盘页北京时间一致
+    var utc = d.getTime() + d.getTimezoneOffset() * 60000;
+    var bjt = new Date(utc + 8 * 3600000);
+    var hh = String(bjt.getHours()).padStart(2, "0");
+    var mm = String(bjt.getMinutes()).padStart(2, "0");
+    return hh + ":" + mm;
+  }
+
   function drawCandleChart(canvas, bars, markers, tf) {
     if (!canvas || !bars || !bars.length) return;
     bars = cropBars(bars, markers || {}, tf);
@@ -57,7 +75,7 @@
     var padL = 4;
     var padR = 4;
     var padT = 4;
-    var padB = 4;
+    var padB = 16; // 底部时间轴
 
     var min = Infinity;
     var max = -Infinity;
@@ -112,12 +130,20 @@
       ctx.fillRect(x - bodyW / 2, top, bodyW, bh);
     });
 
-    // 仅圆点，不画横线/竖线/价签（价签在图例外）
+    // 底部左右时间（北京时间），方便对照成交时刻
+    ctx.fillStyle = "#888899";
+    ctx.font = "10px Microsoft YaHei UI, sans-serif";
+    ctx.textBaseline = "top";
+    ctx.textAlign = "left";
+    ctx.fillText(fmtBjt(bars[0].ts), padL, cssH - padB + 2);
+    ctx.textAlign = "right";
+    ctx.fillText(fmtBjt(bars[n - 1].ts), cssW - padR, cssH - padB + 2);
+
     var entryColor = "#4cc2ff";
     var exitColor = "#f0b429";
-    var entryIdx = nearestBarIndex(bars, markers.openTs);
+    var entryIdx = barIndexAt(bars, markers.openTs, tf);
     var exitIdx =
-      markers.closeTs != null ? nearestBarIndex(bars, markers.closeTs) : -1;
+      markers.closeTs != null ? barIndexAt(bars, markers.closeTs, tf) : -1;
     var hasExit =
       markers.closeTs != null &&
       markers.closePrice != null &&
@@ -143,7 +169,6 @@
       pe = drawDot(entryIdx, markers.openPrice, entryColor);
     }
     if (hasExit) {
-      // 同一根或相邻：出场点略向右错开，避免叠成一团
       if (Math.abs(exitIdx - entryIdx) <= 1) {
         var x = xOf(exitIdx) + Math.max(6, slot * 0.8);
         var y = yOf(markers.closePrice);
@@ -163,7 +188,6 @@
       }
     }
 
-    // 极短引线：点旁只写「入」「出」一字，不写价格
     ctx.font = "bold 10px Microsoft YaHei UI, sans-serif";
     if (pe) {
       ctx.fillStyle = entryColor;
@@ -178,10 +202,15 @@
       ctx.fillText("出", px.x, px.y - 6);
     }
 
-    // 更新图外图例里的实际显示根数
     var meta = canvas.parentElement && canvas.parentElement.querySelector(".chart-meta");
     if (meta) {
-      meta.textContent = bars.length + " 根";
+      meta.textContent =
+        bars.length +
+        " 根 · " +
+        fmtBjt(bars[0].ts) +
+        "–" +
+        fmtBjt(bars[n - 1].ts) +
+        " 北京时间";
     }
   }