fix: 四所统计日历 embed 切换后初始化与加载失败仍渲染网格

统一 initInstanceStatsCalendar，统计 tab 动态注入时重新挂载日历，API 异常时保留月历骨架。

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

crypto_monitor_binance/templates/index.html

@@ -851,7 +851,7 @@
 <script src="/static/form_submit_guard.js?v=2"></script>
 <script src="/static/manual_order_rr_preview.js?v=5"></script>
 <script src="/static/strategy_roll.js?v=5"></script>
-<script src="/static/trade_stats_calendar.js?v=1"></script>
+<script src="/static/trade_stats_calendar.js?v=2"></script>
 <script>
 const JOURNAL_ENTRY_REASON_OPTIONS = {{ entry_reason_options | tojson }};
 const JOURNAL_ENTRY_REASON_OTHER = {{ entry_reason_other_value | tojson }};
@@ -1510,36 +1510,7 @@ function switchStatsSegment(){
     q.set("stats_segment", key);
     const qs = q.toString();
     history.replaceState(null, "", qs ? (window.location.pathname + "?" + qs) : window.location.pathname);
-    if(statsCalendarWidget) statsCalendarWidget.load();
-}
-
-let statsCalendarWidget = null;
-
-function initStatsCalendarWidget(){
-    const grid = document.getElementById("stats-calendar");
-    if(!grid || !window.TradeStatsCalendar) return;
-    statsCalendarWidget = new TradeStatsCalendar({
-        gridEl: grid,
-        titleEl: document.getElementById("stats-cal-title"),
-        prevBtn: document.getElementById("stats-cal-prev"),
-        nextBtn: document.getElementById("stats-cal-next"),
-        apiUrl: "/api/stats/calendar",
-        showSick: false,
-        buildQuery: function(year, month){
-            const q = new URLSearchParams();
-            q.set("year", String(year));
-            q.set("month", String(month));
-            const sel = document.getElementById("stats-segment-select");
-            if(sel) q.set("segment", sel.value || "all");
-            return q;
-        },
-        parseResponse: function(data){
-            if(data && data.ok === false) return {};
-            return (data && data.days) || {};
-        }
-    });
-    statsCalendarWidget.ensureMonth(new Date());
-    statsCalendarWidget.load();
+    if(window.statsCalendarWidget) window.statsCalendarWidget.load();
 }
 
 function initStatsSegmentFromUrl(){
@@ -1563,7 +1534,7 @@ function toggleStatsCard(){
 attachListWindowToExports();
 toggleListWindowCustom();
 initStatsSegmentFromUrl();
-initStatsCalendarWidget();
+if(typeof initInstanceStatsCalendar === "function") initInstanceStatsCalendar();
 if(document.getElementById("journal-list")) loadJournals();
 if(document.getElementById("review-list")) loadReviews();
 const reviewToggle = document.getElementById("review-mode-toggle");