修正 Studio 力曲线原点、运行不可用提示与禁用按钮样式

FN 轴视图留 8% 余量使 0 刻度与静止曲线离开边框；实时视图在轨道上直接写出运行不可用的原因；禁用按钮改为虚线无填充，复选框加勾，单选框选中不再变方，并放大勾选框、微调框箭头、滚动条与菜单行以便触屏操作。另修 ui_check 桩 worker 签名与英文回放提示。在 Linux 离屏环境对比未改动的 HEAD 验证：studio 失败集合为 HEAD 的子集，ui_check 结果一致。

shared/src/orisys_app_shared/theme/qss.py

@@ -69,6 +69,51 @@ def _paint_arrow(kind: str, fill: str) -> str:
         return ""
 
 
+@lru_cache(maxsize=8)
+def _paint_check(fill: str) -> str:
+    """Draw a tick PNG for a checked checkbox; return its path ('' on failure).
+
+    A checked box used to be a solid square, which at 15 px reads as "disabled"
+    or "indeterminate" rather than "on".
+    """
+    try:
+        from PySide6.QtCore import QPointF, Qt
+        from PySide6.QtGui import QColor, QImage, QPainter, QPainterPath, QPen
+    except Exception:  # pragma: no cover - headless import failure
+        return ""
+    try:
+        size = 36  # drawn at 2x the indicator so the tick stays crisp when scaled
+        safe = fill.strip().lstrip("#").replace("/", "")
+        path = _arrow_icon_cache_dir() / f"check_{safe}.png"
+        if path.is_file():
+            return str(path)
+        image = QImage(size, size, QImage.Format.Format_ARGB32)
+        image.fill(Qt.GlobalColor.transparent)
+        painter = QPainter(image)
+        painter.setRenderHint(QPainter.RenderHint.Antialiasing, True)
+        pen = QPen(QColor(fill), size * 0.13)
+        pen.setCapStyle(Qt.PenCapStyle.RoundCap)
+        pen.setJoinStyle(Qt.PenJoinStyle.RoundJoin)
+        painter.setPen(pen)
+        tick = QPainterPath(QPointF(size * 0.22, size * 0.52))
+        tick.lineTo(QPointF(size * 0.42, size * 0.72))
+        tick.lineTo(QPointF(size * 0.78, size * 0.30))
+        painter.drawPath(tick)
+        painter.end()
+        if not image.save(str(path), "PNG"):
+            return ""
+        return str(path)
+    except Exception:  # pragma: no cover - never break theming
+        return ""
+
+
+def _check_image(fill: str) -> str:
+    path = _paint_check(fill)
+    if not path:
+        return "none"
+    return 'url("' + path.replace("\\", "/") + '")'
+
+
 def _arrow_image(kind: str, fill: str, size: int = 14) -> str:
     path = _paint_arrow(kind, fill)
     if not path:
@@ -86,6 +131,8 @@ def build_qss(theme: str = "dark") -> str:
     arrow_up = _arrow_image("up", dim)
     arrow_down_disabled = _arrow_image("down", muted)
     arrow_up_disabled = _arrow_image("up", muted)
+    check_mark = _check_image(accent_text)
+    check_mark_disabled = _check_image(muted)
     return f"""
 QWidget {{
     background-color: {c['window_bg']};
@@ -117,7 +164,7 @@ QMenu {{
     padding: 4px;
 }}
 QMenu::item {{
-    padding: 6px 18px;
+    padding: 8px 20px;
     border-radius: 4px;
 }}
 QMenu::item:selected {{
@@ -219,10 +266,13 @@ QPushButton:pressed {{
 QPushButton:focus {{
     border-color: {c['focus_ring']};
 }}
+/* Disabled = no fill and a dashed outline. A filled disabled button was the
+   same colour as an enabled neutral one, so a rail of unavailable actions
+   read as a rail of available ones. */
 QPushButton:disabled {{
     color: {c['text_muted']};
-    background-color: {c['window_bg']};
-    border: 1px solid {c['separator']};
+    background-color: transparent;
+    border: 1px dashed {c['input_border']};
 }}
 QPushButton#primaryButton {{
     background-color: {c['accent']};
@@ -241,9 +291,9 @@ QPushButton#primaryButton:checked {{
     border-color: {c['accent']};
 }}
 QPushButton#primaryButton:disabled {{
-    background-color: {c['panel_border']};
+    background-color: transparent;
     color: {c['text_muted']};
-    border-color: {c['panel_border']};
+    border: 1px dashed {c['input_border']};
 }}
 QPushButton#dangerButton {{
     background-color: {c['danger_fill']};
@@ -262,9 +312,9 @@ QPushButton#dangerButton:checked {{
     border-color: {c['danger_fill']};
 }}
 QPushButton#dangerButton:disabled {{
-    background-color: {c['panel_border']};
+    background-color: transparent;
     color: {c['text_muted']};
-    border-color: {c['panel_border']};
+    border: 1px dashed {c['input_border']};
 }}
 QPushButton#ghostButton {{
     background-color: transparent;
@@ -310,8 +360,8 @@ QPushButton#dangerOutline:checked {{
 }}
 QPushButton#dangerOutline:disabled {{
     color: {c['text_muted']};
-    background-color: {c['window_bg']};
-    border: 1px solid {c['separator']};
+    background-color: transparent;
+    border: 1px dashed {c['input_border']};
 }}
 QPushButton[compact="true"] {{
     padding: 6px 9px;
@@ -428,9 +478,12 @@ QComboBox QAbstractItemView {{
     selection-background-color: {c['menu_hover']};
     selection-color: {c['text_primary']};
 }}
+QComboBox QAbstractItemView::item {{
+    min-height: 30px;
+}}
 QAbstractSpinBox::up-button, QAbstractSpinBox::down-button {{
     subcontrol-origin: border;
-    width: 18px;
+    width: 22px;
     background: transparent;
     border: none;
 }}
@@ -457,15 +510,17 @@ QAbstractSpinBox::down-arrow:disabled {{
     image: {arrow_down_disabled};
 }}
 /* ---------- Check / radio ---------- */
+/* 18 px boxes and a taller row: the label is part of the hit area, and the
+   whole row has to be easy to hit with a finger. */
 QCheckBox, QRadioButton {{
     background: transparent;
     color: {c['text_primary']};
-    spacing: 7px;
-    padding: 2px 0;
+    spacing: 8px;
+    padding: 4px 0;
 }}
 QCheckBox::indicator, QRadioButton::indicator {{
-    width: 15px;
-    height: 15px;
+    width: 18px;
+    height: 18px;
     background-color: {c['input_bg']};
     border: 1px solid {c['input_border']};
 }}
@@ -473,23 +528,34 @@ QCheckBox::indicator {{
     border-radius: 4px;
 }}
 QRadioButton::indicator {{
-    border-radius: 8px;
+    border-radius: 10px;
 }}
 QCheckBox::indicator:hover, QRadioButton::indicator:hover {{
     border-color: {c['accent_hover']};
 }}
-QCheckBox::indicator:checked, QRadioButton::indicator:checked {{
+QCheckBox::indicator:checked {{
     background-color: {c['accent']};
-    border: 4px solid {c['accent']};
+    border: 1px solid {c['accent']};
+    image: {check_mark};
 }}
+/* QSS borders add to ``width``: a 5 px ring on an 18 px box grew the checked
+   radio to 28 px and turned the circle into a rounded square. Shrinking the
+   content keeps the outer size (20 px) equal to the unchecked one. */
 QRadioButton::indicator:checked {{
+    width: 10px;
+    height: 10px;
     background-color: {c['input_bg']};
-    border: 4px solid {c['accent']};
+    border: 5px solid {c['accent']};
 }}
 QCheckBox::indicator:disabled, QRadioButton::indicator:disabled {{
     background-color: {c['window_bg']};
     border-color: {c['separator']};
 }}
+QCheckBox::indicator:checked:disabled {{
+    background-color: {c['separator']};
+    border-color: {c['separator']};
+    image: {check_mark_disabled};
+}}
 /* ---------- Progress ---------- */
 QProgressBar {{
     background-color: {c['input_bg']};
@@ -549,26 +615,26 @@ QTableCornerButton::section {{
 /* ---------- Scrollbars ---------- */
 QScrollBar:vertical {{
     background: {c['scrollbar_bg']};
-    width: 10px;
+    width: 12px;
     margin: 0;
     border: none;
 }}
 QScrollBar:horizontal {{
     background: {c['scrollbar_bg']};
-    height: 10px;
+    height: 12px;
     margin: 0;
     border: none;
 }}
 QScrollBar::handle:vertical {{
     background: {c['scrollbar_handle']};
-    min-height: 28px;
-    border-radius: 5px;
+    min-height: 32px;
+    border-radius: 6px;
     margin: 2px;
 }}
 QScrollBar::handle:horizontal {{
     background: {c['scrollbar_handle']};
-    min-width: 28px;
-    border-radius: 5px;
+    min-width: 32px;
+    border-radius: 6px;
     margin: 2px;
 }}
 QScrollBar::handle:vertical:hover, QScrollBar::handle:horizontal:hover {{
@@ -707,3 +773,4 @@ def color(theme: str, key: str, default: str = "#888888") -> str:
 def clear_theme_cache() -> None:
     load_colors.cache_clear()
     _paint_arrow.cache_clear()
+    _paint_check.cache_clear()