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。

apps/studio/src/orisys_studio/app_window.py

@@ -1344,12 +1344,9 @@ class StudioMainWindow(QMainWindow):
         elif self.toolbar.source_mode() == "video":
             # Live acquires from a camera. A video file is played from the History
             # replay view (Play and the chart cursor), not by starting a chain here.
+            # Choosing a file would not help here, so the reason never asks for one.
             source_ok = False
-            reason = (
-                t("toolbar.run_video_in_replay")
-                if self.toolbar.video_path()
-                else t("toolbar.run_disabled_video")
-            )
+            reason = t("toolbar.run_video_in_replay")
         self.toolbar.set_run_tooltip_reason(reason)
         # While a session exists the transport stays enabled — pausing and resuming
         # are the whole point of it being checked, not an exception to an idle rule.

apps/studio/src/orisys_studio/ui/force_plots.py

@@ -60,6 +60,28 @@ CURSOR_READOUT_S = 0.5
 #: counts as a *selection* rather than the default "whole session" fit. 1% of the
 #: session absorbs the float noise of a fit without hiding a real zoom.
 SELECTION_EPSILON = 0.01
+#: Share of a fixed axis span left free beyond each configured bound. Without it
+#: the bound labels (FN's "0") sit on the plot frame and are not drawn, and a
+#: resting FN curve is painted on the border it shares with the FX subplot. 8 %
+#: is about half a label's height on the smallest subplot ui_check measures.
+AXIS_MARGIN_FRACTION = 0.08
+
+
+def _display_range(lower: float, upper: float) -> tuple[float, float]:
+    """The view range that shows ``lower…upper`` with a margin on both sides.
+
+    The configured range — and the ticks — stay exactly what the operator set;
+    only the drawn view is wider. A margin never brings zero into view when the
+    configured range excludes it, so the zero line keeps meaning "zero is here".
+    """
+    pad = (float(upper) - float(lower)) * AXIS_MARGIN_FRACTION
+    view_lower = lower - pad
+    if lower > 0.0 >= view_lower:
+        view_lower = lower
+    view_upper = upper + pad
+    if upper < 0.0 <= view_upper:
+        view_upper = upper
+    return view_lower, view_upper
 
 
 def _window_brush(theme: str):
@@ -316,6 +338,9 @@ class ForcePlotsPanel(QFrame):
         for i, _name in enumerate(CHANNEL_LABELS):
             plot = self.plot_widget.addPlot(row=i, col=0)
             plot.showGrid(x=True, y=True, alpha=GRID_ALPHA)
+            # A bound label (FN's 0) may reach past the axis end by a few pixels on
+            # a short subplot; drawing it is better than losing the origin.
+            plot.getAxis("left").setStyle(hideOverlappingLabels=False)
             # Panning and zooming are always available: a chart that ignores the
             # mouse until it is already browsing could never *enter* browsing by
             # being dragged. Y stays locked to the configured limits.
@@ -719,7 +744,7 @@ class ForcePlotsPanel(QFrame):
                 self.plots[i].setXRange(*state.x_range, padding=0.0)
                 if use_fixed:
                     ymin, ymax = self._fixed_y_range(i)
-                    self.plots[i].setYRange(ymin, ymax, padding=0.0)
+                    self.plots[i].setYRange(*_display_range(ymin, ymax), padding=0.0)
                     self.plots[i].getAxis("left").setTicks(
                         [_nice_ticks(ymin, ymax, count=5)]
                     )
@@ -1363,7 +1388,7 @@ class ForcePlotsPanel(QFrame):
             for i, plot in enumerate(self.plots):
                 if use_fixed:
                     ymin, ymax = self._fixed_y_range(i)
-                    plot.setYRange(ymin, ymax, padding=0.0)
+                    plot.setYRange(*_display_range(ymin, ymax), padding=0.0)
                     plot.getAxis("left").setTicks([_nice_ticks(ymin, ymax, count=5)])
                 else:
                     plot.getAxis("left").setTicks(None)

apps/studio/src/orisys_studio/ui/toolbar.py

@@ -181,6 +181,16 @@ class ToolbarWidget(QWidget):
         self.data_state = ShrinkableLabel()
         self.data_state.setObjectName("panelMeta")
         self.data_state.setVisible(False)
+        # Why the transport cannot start, as text on the rail. A tooltip alone was
+        # the only place this was said, and a touch screen has no hover to show it.
+        # Ignored horizontally, so it only ever gets the rail's spare width and
+        # never squeezes a button; hidden when empty, so it costs no spacing.
+        self.run_hint = ShrinkableLabel()
+        self.run_hint.setObjectName("panelMeta")
+        self.run_hint.setSizePolicy(
+            QSizePolicy.Policy.Ignored, QSizePolicy.Policy.Preferred
+        )
+        self.run_hint.setVisible(False)
         self.record_chip = RecordStatusChip(theme=self._theme)
 
         # --- capture source (one of the two groups is visible) -------------
@@ -288,7 +298,9 @@ class ToolbarWidget(QWidget):
         rail.addWidget(self.source_summary)
         rail.addWidget(self.calibration_label)
         rail.addWidget(self.data_state)
-        rail.addStretch(1)
+        # Shown, the hint takes the spare width (stretch 1); hidden, the spacer does.
+        rail.addWidget(self.run_hint, 1)
+        rail.addStretch(0)
         rail.addWidget(self.record_chip)
         rail.addWidget(_rail(self.btn_record))
         rail.addWidget(_rail(self.btn_run))
@@ -358,6 +370,7 @@ class ToolbarWidget(QWidget):
     def set_theme(self, theme: str) -> None:
         self._theme = str(theme)
         self.record_chip.set_theme(self._theme)
+        self._apply_run_hint()
 
     def set_sensor_summary(self, text: str) -> None:
         """The rail's sensor button text (``BOX · box/sensor.json``)."""
@@ -432,6 +445,7 @@ class ToolbarWidget(QWidget):
         # The reset is the one rail control whose *target* moves with the view (see
         # ``reset_target``), so its label is refreshed with the other two.
         self._refresh_reset_label()
+        self._apply_run_hint()
 
     def run_role(self) -> str:
         return self._run_role
@@ -557,11 +571,33 @@ class ToolbarWidget(QWidget):
         self._run_available = bool(enabled)
         self.btn_run.setEnabled(bool(enabled))
         self._apply_run_tooltip()
+        self._apply_run_hint()
 
     def set_run_tooltip_reason(self, reason: str) -> None:
         """Explain *why* Run is unavailable (shown in the button tooltip)."""
         self._run_tooltip_reason = str(reason or "")
         self._apply_run_tooltip()
+        self._apply_run_hint()
+
+    def _apply_run_hint(self) -> None:
+        """Show the reason on the rail while acquisition cannot start.
+
+        Only the *blocking* reason is shown: an advisory one (a bare video plays
+        with empty charts) stays in the tooltip, so the rail is not a second
+        status bar. The replay view is left out on purpose: its empty 2D pane
+        already says which button opens a recording, and the extra rail item
+        would cost the width the replay rail does not have at 1280 px.
+        """
+        blocked = not self._run_available and self._run_role != "playback"
+        text = self._run_tooltip_reason if blocked else ""
+        self.run_hint.setText(text)
+        self.run_hint.setToolTip(text)
+        self.run_hint.setVisible(bool(text))
+        if text:
+            self.run_hint.setStyleSheet(
+                f"QLabel#panelMeta {{ color: {color(self._theme, 'warning')};"
+                " background: transparent; }"
+            )
 
     def set_run_phase(self, phase: str) -> None:
         """Track the session phase.