Fix strategy checklist print closing too early.

Stop auto-closing the print tab on afterprint (short checklist pages were especially fragile), load print HTML via fetch into a blank window, and use CSS checkboxes instead of Unicode ballot boxes.

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

lib/hub/hub_strategy_lib.py

@@ -218,16 +218,22 @@ def strategy_meta_payload() -> dict[str, Any]:
     return {"ok": True, "exchanges": tabs}
 
 
-def _checklist_html(checklist: dict[str, Any]) -> str:
+def _checklist_html(checklist: dict[str, Any], *, include_title: bool = True) -> str:
     groups = checklist.get("groups") or []
-    parts = [f"<h2>{escape_html(str(checklist.get('title') or '开仓检查清单'))}</h2>"]
+    parts: list[str] = []
+    if include_title:
+        parts.append(f"<h2>{escape_html(str(checklist.get('title') or '开仓检查清单'))}</h2>")
     for grp in groups:
         if not isinstance(grp, dict):
             continue
         gtitle = escape_html(str(grp.get("title") or ""))
         parts.append(f"<h3>{gtitle}</h3><ul class=\"checklist\">")
         for item in grp.get("items") or []:
-            parts.append(f"<li><span class=\"box\" aria-hidden=\"true\">☐</span> {escape_html(str(item))}</li>")
+            # 用 CSS 方框代替 ☐,避免部分打印机/预览吞掉 Unicode 勾选符
+            parts.append(
+                f"<li><span class=\"box\" aria-hidden=\"true\"></span>"
+                f"<span class=\"item-text\">{escape_html(str(item))}</span></li>"
+            )
         parts.append("</ul>")
     footnotes = checklist.get("footnotes") or []
     if footnotes:
@@ -330,15 +336,28 @@ body {
   padding: 0;
 }
 .checklist li {
-  margin: 7px 0;
+  display: flex;
+  align-items: flex-start;
+  gap: 8px;
+  margin: 8px 0;
   padding: 0;
 }
 .box {
+  flex: 0 0 auto;
   display: inline-block;
-  width: 1.05em;
-  margin-right: 6px;
-  font-size: 1.05em;
-  line-height: 1.2;
+  width: 0.95em;
+  height: 0.95em;
+  margin-top: 0.2em;
+  border: 1.5px solid #333;
+  border-radius: 2px;
+  background: #fff;
+  box-sizing: border-box;
+  -webkit-print-color-adjust: exact;
+  print-color-adjust: exact;
+}
+.item-text {
+  flex: 1 1 auto;
+  min-width: 0;
 }
 .footnotes {
   margin: 18px 0 0;
@@ -364,16 +383,18 @@ body {
 
 
 def _print_auto_script() -> str:
+    # 不在 afterprint 里 window.close(): Firefox 会在打开打印框时就触发 afterprint,
+    # 短页(检查清单)更容易被立刻关掉,表现为「打不开/打不出来」;策略长文相对不易复现.
     return """<script>
 (function () {
-  function done() {
-    try { window.close(); } catch (e) {}
+  function go() {
+    try { window.focus(); } catch (e) {}
+    window.setTimeout(function () {
+      try { window.print(); } catch (e) {}
+    }, 250);
   }
-  window.addEventListener("afterprint", done, { once: true });
-  window.addEventListener("load", function () {
-    window.setTimeout(function () { window.print(); }, 120);
-    window.setTimeout(done, 60000);
-  });
+  if (document.readyState === "complete") go();
+  else window.addEventListener("load", go, { once: true });
 })();
 </script>"""
 
@@ -398,7 +419,7 @@ def build_print_html(exchange_key: str, part: str = "doc") -> str:
   <h1>{escape_html(cl_title)}</h1>
   <p class="doc-meta">{escape_html(label)} · {escape_html(version)} · 打印 {escape_html(now)}</p>
 </header>
-<div class="doc-body">{_checklist_html(checklist)}</div>
+<div class="doc-body">{_checklist_html(checklist, include_title=False)}</div>
 </article>"""
     elif part == "doc":
         page_title = f"{label} · 策略说明"
@@ -453,8 +474,9 @@ h1{{font-size:1.35rem;margin:0 0 8px}}
 .strategy-doc table{{border-collapse:collapse;width:100%;font-size:.88rem}}
 .strategy-doc th,.strategy-doc td{{border:1px solid #ccc;padding:6px 8px;text-align:left}}
 .checklist ul{{list-style:none;padding:0;margin:0}}
-.checklist li{{margin:8px 0;padding-left:0}}
-.box{{display:inline-block;width:1em;margin-right:6px}}
+.checklist li{{display:flex;align-items:flex-start;gap:8px;margin:8px 0}}
+.box{{flex:0 0 auto;display:inline-block;width:.95em;height:.95em;margin-top:.2em;border:1.5px solid #333;border-radius:2px;background:#fff;box-sizing:border-box}}
+.item-text{{flex:1 1 auto}}
 @media print{{body{{margin:12mm}}}}
 </style>
 </head>