fix: 修复主站自动刷新内存泄漏，并完善 chan_tv 图表体验

主站重建前完整 dispose、去掉重复 sync 监听，自动刷新默认增量更新；顺带消除首屏重复 analyze、复用 ChanMACD，以及全版 TV 指标/未完成中枢/布局本地缓存。

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

web/static/js/app/chan_engine.js

@@ -981,19 +981,41 @@ function findBiCenters(biList) {
       var lows = biList_for_zs.map(function(bi) { return Math.min(bi.p0, bi.p1) })
       gg = Math.max.apply(null, highs)
       dd = Math.min.apply(null, lows)
-      endBiIdx = startIdx + addedAfterLeave.length
+      endBiIdx = startIdx + 2 + addedAfterLeave.length
+    }
+
+    var lastBiInCenter = biList_for_zs[biList_for_zs.length - 1]
+    // 是否已离开中枢：之后出现完全在 ZG 之上或 ZD 之下的确认笔 → 中枢完成
+    var zsSure = false
+    var lastInListIdx = -1
+    for (var li = 0; li < biList.length; li++) {
+      if (biList[li] === lastBiInCenter || (biList[li].t0 === lastBiInCenter.t0 && biList[li].t1 === lastBiInCenter.t1)) {
+        lastInListIdx = li
+        break
+      }
+    }
+    if (lastInListIdx < 0) lastInListIdx = endBiIdx
+    for (var j = lastInListIdx + 1; j < biList.length; j++) {
+      var leaveBi = biList[j]
+      if (!leaveBi.sure) break
+      var lbh = Math.max(leaveBi.p0, leaveBi.p1)
+      var lbl = Math.min(leaveBi.p0, leaveBi.p1)
+      if (lbl > zg || lbh < zd) {
+        zsSure = true
+        break
+      }
     }
 
     var zs = {
       t0: bi1.t0,
-      t1: biList_for_zs[biList_for_zs.length - 1].t1,
+      t1: lastBiInCenter.t1,
       high: zg, low: zd,
       zg: zg, zd: zd,
       gg: gg, dd: dd,
-      is_sure: biList_for_zs[biList_for_zs.length - 1].sure,
+      is_sure: zsSure,
       bi_count: biList_for_zs.length,
-      bi_list: biList_for_zs,          // 中枢内的笔列表（按序）
-      start_bi_idx: startIdx,          // 中枢首笔在总列表中的索引
+      bi_list: biList_for_zs,
+      start_bi_idx: startIdx,
       dir: zsDir,
       pre: lastZs,
       next: null,
@@ -1008,28 +1030,6 @@ function findBiCenters(biList) {
     startIdx = startIdx + 4 + (addedAfterLeave.length > 0 ? addedAfterLeave.length : 0)
   }
 
-  // 末中枢确认
-  if (lastZs && !lastZs.is_sure) {
-    var lastBiInZs = lastZs.bi_count > 0 ? biList_for_zs[biList_for_zs.length - 1] : null
-    if (lastBiInZs) {
-      var hasLeave = false
-      var lastBiIdx = biList.indexOf(lastBiInZs)
-      if (lastBiIdx >= 0) {
-        for (var i = lastBiIdx + 1; i < biList.length; i++) {
-          var bi = biList[i]
-          if (bi.sure) {
-            var bh = Math.max(bi.p0, bi.p1), bl = Math.min(bi.p0, bi.p1)
-            var leave = (bl > lastZs.zg && bh > lastZs.zg) || (bh < lastZs.zd && bl < lastZs.zd)
-            if (leave) { hasLeave = true; break }
-          }
-        }
-      }
-      if (hasLeave && lastBiInZs.sure) {
-        lastZs.t1 = lastBiInZs.t1
-      }
-    }
-  }
-
   return zsList
 }
 
@@ -1119,16 +1119,37 @@ function findSegCenters(segs) {
       endSegIdx = startIdx + 2 + addedSegs.length
     }
 
+    var lastSegInCenter = segList_for_zs[segList_for_zs.length - 1]
+    var zsSure = false
+    var lastSegListIdx = -1
+    for (var lsi = 0; lsi < segs.length; lsi++) {
+      if (segs[lsi] === lastSegInCenter || (segs[lsi].t0 === lastSegInCenter.t0 && segs[lsi].t1 === lastSegInCenter.t1)) {
+        lastSegListIdx = lsi
+        break
+      }
+    }
+    if (lastSegListIdx < 0) lastSegListIdx = endSegIdx
+    for (var sj = lastSegListIdx + 1; sj < segs.length; sj++) {
+      var leaveSeg = segs[sj]
+      if (!leaveSeg.sure) break
+      var lsh = Math.max(leaveSeg.p0, leaveSeg.p1)
+      var lsl = Math.min(leaveSeg.p0, leaveSeg.p1)
+      if (lsl > zg || lsh < zd) {
+        zsSure = true
+        break
+      }
+    }
+
     var zs = {
       t0: s1.t0,
-      t1: segs[endSegIdx].t1,
+      t1: lastSegInCenter.t1,
       high: zg, low: zd,
       zg: zg, zd: zd,
       gg: gg, dd: dd,
-      is_sure: segs[endSegIdx].sure,
+      is_sure: zsSure,
       seg_count: segList_for_zs.length,
-      seg_list: segList_for_zs,          // 中枢内的段列表（按序）
-      start_seg_idx: startIdx,           // 中枢首段在总列表中的索引
+      seg_list: segList_for_zs,
+      start_seg_idx: startIdx,
       dir: zsDir,
       pre: lastZs,
       next: null,