界面不摆还没接线的开关：先撤掉“同时显示未滤波曲线” - What: plot_settings_dialog 去掉"同时显示未滤波曲线"复选框（连同 reset 里的清位、retranslate 的两行文案、filter_values() 里的读取），filter_values() 里写明 show_unfiltered 暂时固定 False 及原因；两个 locale 删掉 filter_show_unfiltered / filter_show_unfiltered_tip 两个键。FilterSettings.show_unfiltered 字段保留（session.json 的 filters 块仍在记它，等第二 buffer 接上后再把开关放回对话框）。 - Why: 上一版把这个复选框放进了对话框，但"未滤波曲线"还没有数据通路——力值卡片不画、CSV 也没有 *_unfiltered 列，等于界面上摆了一个承诺了却不做事的开关；这正是这一轮一直在清理的那类问题（文件说的/界面说的与实际做的不一致）。宁可先不给入口，也不要给一个假的。 - Verification: .repro/locale_check.py：287 个字面键全部命中、两个 locale 键集合相同（341/341）；studio 全量 89 passed；ui_check 554 项检查 0 失败。 - Not in this change: CSV 的 17 列与未滤波第二 buffer 仍未接线（这是把开关放回来的前提）。

apps/studio/config/locales/en_US.json

@@ -72,8 +72,6 @@
     "filter_rate_tip": "The rate the low-pass coefficients are designed for (Hz)",
     "filter_rate_auto": "Follow the measured frame rate",
     "filter_rate_auto_tip": "Design the low-pass for the device's measured rate; clear it to pin a number",
-    "filter_show_unfiltered": "Also show the unfiltered curves",
-    "filter_show_unfiltered_tip": "Draw the pre-filter readings beside the filtered ones, so what the filter did can be judged. Display only — the record is unaffected",
     "filter_measurement_note": "The flow EMA is a *measurement* setting: changing it makes this recording incomparable with earlier ones.",
     "filter_locked": "Filters cannot change while recording; this applies to the next session.",
     "filter_nyquist": "Note: a {cutoff} Hz cutoff is at or above the Nyquist frequency of {nyquist} Hz (sample rate {rate} Hz) — the device would not filter. Lower the cutoff or pin a higher sample rate.",

apps/studio/config/locales/zh_CN.json

@@ -72,8 +72,6 @@
     "filter_rate_tip": "低通系数按哪个采样率设计（Hz）",
     "filter_rate_auto": "自动跟随帧率",
     "filter_rate_auto_tip": "按设备实测帧率设计低通系数；取消可固定一个数值",
-    "filter_show_unfiltered": "同时显示未滤波曲线",
-    "filter_show_unfiltered_tip": "在力值卡片上把滤波前的读数一并显示，便于判断滤波到底做了什么。只影响显示，不影响记录",
     "filter_measurement_note": "光流 EMA 属于“测量”设置：改了它，本次录制与之前的不可比。",
     "filter_locked": "录制中不能更改滤波；下一次采集生效。",
     "filter_nyquist": "注意：低通 {cutoff} Hz 已达到或超过奈奎斯特频率 {nyquist} Hz（采样率 {rate} Hz）——设备不会滤。请调低截止频率或固定更高的采样率。",

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

@@ -196,9 +196,6 @@ class PlotSettingsDialog(QDialog):
             lambda checked: self.rate_spin.setEnabled(not checked)
         )
 
-        self.show_unfiltered_check = QCheckBox()
-        self.show_unfiltered_check.setChecked(bool(filters.show_unfiltered))
-
         self.filter_preset_label = QLabel()
         self.flow_ema_label = QLabel()
         self.median_label = QLabel()
@@ -212,11 +209,9 @@ class PlotSettingsDialog(QDialog):
         group_form.addRow(self.lowpass_label, self.lowpass_spin)
         group_form.addRow(self.lowpass_order_label, self.lowpass_order_spin)
         group_form.addRow(self.rate_auto_check, self.rate_spin)
-        group_form.addRow(self.show_unfiltered_check)
 
         for widget in (self.flow_ema_spin, self.median_spin, self.lowpass_spin,
-                       self.rate_spin, self.rate_auto_check,
-                       self.show_unfiltered_check):
+                       self.rate_spin, self.rate_auto_check):
             widget.setToolTip("")  # filled in by retranslate()
         self.flow_ema_spin.valueChanged.connect(self._on_filter_value_edited)
         self.median_spin.valueChanged.connect(self._on_filter_value_edited)
@@ -291,13 +286,17 @@ class PlotSettingsDialog(QDialog):
         rate: float | str = "auto"
         if not self.rate_auto_check.isChecked():
             rate = float(self.rate_spin.value())
+        # ``show_unfiltered`` is deliberately not offered here yet: the second
+        # (unfiltered) buffer is not wired to the cards or the CSV, and a switch
+        # that promises a curve it does not draw is worse than no switch. The
+        # field is kept in the settings (and in the record) until it lands.
         return FilterSettings(
             flow_ema_alpha=float(self.flow_ema_spin.value()),
             median_window=int(self.median_spin.value()),
             lowpass_hz=float(self.lowpass_spin.value()),
             lowpass_order=int(self.lowpass_order_spin.value()),
             sample_rate_hz=rate,
-            show_unfiltered=self.show_unfiltered_check.isChecked(),
+            show_unfiltered=False,
             preset=self.selected_preset(),
         ).normalised()
 
@@ -352,7 +351,6 @@ class PlotSettingsDialog(QDialog):
         self.lowpass_spin.setValue(0.0)
         self.lowpass_order_spin.setValue(2)
         self.rate_auto_check.setChecked(True)
-        self.show_unfiltered_check.setChecked(False)
         self._show_preset("off")
         self._refresh_filter_note()
 
@@ -385,8 +383,6 @@ class PlotSettingsDialog(QDialog):
         self.rate_auto_check.setToolTip(t("dialog.filter_rate_auto_tip"))
         self.rate_label.setText(t("dialog.filter_rate"))
         self.rate_spin.setToolTip(t("dialog.filter_rate_tip"))
-        self.show_unfiltered_check.setText(t("dialog.filter_show_unfiltered"))
-        self.show_unfiltered_check.setToolTip(t("dialog.filter_show_unfiltered_tip"))
         self._refresh_filter_note()
         ok_btn = self.button_box.button(QDialogButtonBox.Ok)
         cancel_btn = self.button_box.button(QDialogButtonBox.Cancel)