修复依赖缺失问题

ui/dialog_style.py

@@ -1,7 +1,7 @@
 """标准对话框（QMessageBox / QInputDialog / QFileDialog）与当前主题一致。"""
 from __future__ import annotations
 
-from PyQt6.QtCore import Qt
+from PyQt6.QtCore import Qt, QTimer
 from PyQt6.QtGui import QTextOption
 from PyQt6.QtWidgets import (
     QFileDialog,
@@ -37,7 +37,6 @@ def stylesheet() -> str:
         }}
         QMessageBox QLabel#qt_msgbox_label {{
             min-width: 200px;
-            max-width: 560px;
         }}
         QMessageBox QLabel#qt_msgboxex_icon_label {{
             min-width: 28px;
@@ -140,31 +139,74 @@ def _apply(w: QWidget | None) -> None:
 
 
 def _prepare_qmessagebox(msg: QMessageBox) -> None:
-    """让提示框按内容换行并自适应宽高（避免固定宽度截断文字）。"""
-    lbl = msg.findChild(QLabel, "qt_msgbox_label")
-    if lbl is not None:
-        lbl.setWordWrap(True)
-        lbl.setTextFormat(Qt.TextFormat.PlainText)
-        # 无空格长中文也能在边界处断行，而不是整段挤在一行被裁切
-        try:
-            lbl.setWordWrapMode(QTextOption.WrapMode.WrapAnywhere)
-        except AttributeError:
-            pass
-        lbl.setMinimumWidth(200)
-        lbl.setMaximumWidth(560)
-        lbl.setSizePolicy(
-            QSizePolicy.Policy.Preferred,
-            QSizePolicy.Policy.MinimumExpanding,
-        )
-    lay = msg.layout()
-    if lay is not None:
-        lay.activate()
+    """让提示框按内容换行并自适应宽高。"""
+    def _tune_labels() -> None:
+        # QMessageBox 里通常有两段文字：
+        # - qt_msgbox_label（主文本）
+        # - qt_msgbox_informativelabel（辅助文本/更长的提示）
+        # 部分平台会在显示/布局后才创建这些 label，因此这里支持延迟执行一次。
+        for obj_name in ("qt_msgbox_label", "qt_msgbox_informativelabel"):
+            w = msg.findChild(QWidget, obj_name)
+            if w is None:
+                continue
+
+            if hasattr(w, "setWordWrap"):
+                try:
+                    w.setWordWrap(True)  # type: ignore[attr-defined]
+                except Exception:
+                    pass
+            if hasattr(w, "setTextFormat"):
+                try:
+                    w.setTextFormat(Qt.TextFormat.PlainText)  # type: ignore[attr-defined]
+                except Exception:
+                    pass
+            if hasattr(w, "setWordWrapMode"):
+                try:
+                    w.setWordWrapMode(QTextOption.WrapMode.WrapAnywhere)  # type: ignore[attr-defined]
+                except Exception:
+                    pass
+            if hasattr(w, "setTextElideMode"):
+                try:
+                    w.setTextElideMode(Qt.TextElideMode.ElideNone)  # type: ignore[attr-defined]
+                except Exception:
+                    pass
+            if hasattr(w, "setMinimumWidth"):
+                try:
+                    w.setMinimumWidth(0)  # type: ignore[attr-defined]
+                except Exception:
+                    pass
+            if hasattr(w, "setMaximumWidth"):
+                try:
+                    w.setMaximumWidth(16777215)  # type: ignore[attr-defined]
+                except Exception:
+                    pass
+            if hasattr(w, "setSizePolicy"):
+                try:
+                    w.setSizePolicy(
+                        QSizePolicy.Policy.Expanding,
+                        QSizePolicy.Policy.MinimumExpanding,
+                    )  # type: ignore[attr-defined]
+                except Exception:
+                    pass
     msg.setSizePolicy(
         QSizePolicy.Policy.Preferred,
         QSizePolicy.Policy.Preferred,
     )
     msg.setMinimumSize(0, 0)
+    msg.setMaximumSize(16777215, 16777215)
+
+    lay = msg.layout()
+    if lay is not None:
+        # QMessageBox 内部通常是 QGridLayout：第 1 列是文本列
+        # 某些主题/平台会让文本列偏窄从而触发省略，这里显式拉伸该列并设置最小宽度。
+        try:
+            lay.setColumnStretch(1, 1)
+        except Exception:
+            pass
+        lay.activate()
+    _tune_labels()
     msg.adjustSize()
+    QTimer.singleShot(0, lambda: (_tune_labels(), msg.adjustSize()))
 
 
 def question(