feat(v1): edit detection sensitivity from the settings tab

Adds write_local_event_tuning and a sensitivity group (confirm window,
horizontal angle, require-rapid-drop, require-lower-body) that persists to
the untracked local config and applies next start. 79 tests pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

v1/gui.py

@@ -254,6 +254,7 @@ class SettingsTab(QtWidgets.QWidget):
         self, draft: SettingsDraft, env_ready: bool, model_summary: str,
         config_path: Optional[str] = None,
         camera: Optional[Dict] = None,
+        event_tuning: Optional[Dict] = None,
         parent: Optional[QtWidgets.QWidget] = None,
     ) -> None:
         super().__init__(parent)
@@ -269,6 +270,7 @@ class SettingsTab(QtWidgets.QWidget):
         source_form.addRow("模型", QtWidgets.QLabel(model_summary))
         layout.addWidget(source_box)
         layout.addWidget(self._build_camera_box(camera or {}))
+        layout.addWidget(self._build_sensitivity_box(event_tuning or {}))
 
         params_box = QtWidgets.QGroupBox("事件参数草稿")
         form = QtWidgets.QFormLayout(params_box)
@@ -402,6 +404,53 @@ class SettingsTab(QtWidgets.QWidget):
         self._probe_worker = None
         self.test_button.setEnabled(True)
 
+    def _build_sensitivity_box(self, tuning: Dict) -> QtWidgets.QGroupBox:
+        box = QtWidgets.QGroupBox("检测灵敏度（保存至本地配置，下次启动生效）")
+        form = QtWidgets.QFormLayout(box)
+        self.confirm_spin = QtWidgets.QDoubleSpinBox()
+        self.confirm_spin.setRange(1.0, 3.0)
+        self.confirm_spin.setSingleStep(0.1)
+        self.confirm_spin.setDecimals(1)
+        self.confirm_spin.setValue(float(tuning.get("confirm_window_seconds", 1.8)))
+        self.angle_spin = QtWidgets.QDoubleSpinBox()
+        self.angle_spin.setRange(0.0, 90.0)
+        self.angle_spin.setSingleStep(5.0)
+        self.angle_spin.setDecimals(0)
+        self.angle_spin.setValue(float(tuning.get("horizontal_angle_threshold_degrees", 45.0)))
+        self.rapid_check = QtWidgets.QCheckBox("要求先快速下移（更严，误报更少）")
+        self.rapid_check.setChecked(bool(tuning.get("require_rapid_drop", False)))
+        self.lower_body_check = QtWidgets.QCheckBox("要求膝踝清晰（更严）")
+        self.lower_body_check.setChecked(bool(tuning.get("require_lower_body", False)))
+        form.addRow("确认窗口（秒，1–3，主防误报）", self.confirm_spin)
+        form.addRow("水平角度阈值（°，越大越易判水平）", self.angle_spin)
+        form.addRow("", self.rapid_check)
+        form.addRow("", self.lower_body_check)
+        self.sensitivity_status = QtWidgets.QLabel("")
+        self.save_sensitivity_button = QtWidgets.QPushButton("保存灵敏度到本地配置")
+        self.save_sensitivity_button.clicked.connect(self._on_save_sensitivity)
+        form.addRow(self.save_sensitivity_button)
+        form.addRow(self.sensitivity_status)
+        return box
+
+    def _on_save_sensitivity(self) -> None:
+        if not self._config_path:
+            self.sensitivity_status.setText("未指定本地配置路径，无法保存")
+            return
+        from v1.config import write_local_event_tuning
+
+        try:
+            write_local_event_tuning(
+                self._config_path,
+                require_rapid_drop=self.rapid_check.isChecked(),
+                require_lower_body=self.lower_body_check.isChecked(),
+                horizontal_angle_threshold_degrees=self.angle_spin.value(),
+                confirm_window_seconds=self.confirm_spin.value(),
+            )
+        except Exception as exc:  # noqa: BLE001 - surface any write error to the UI
+            self.sensitivity_status.setText("保存失败：{0}".format(exc))
+            return
+        self.sensitivity_status.setText("已保存，将在下次开始监控时生效")
+
     def _on_save_camera(self) -> None:
         if not self._config_path:
             self.camera_status.setText("未指定本地配置路径，无法保存")
@@ -433,13 +482,16 @@ class MainWindow(QtWidgets.QMainWindow):
     def __init__(
         self, draft: SettingsDraft, env_ready: bool, model_summary: str, source_name: str,
         config_path: Optional[str] = None, camera: Optional[Dict] = None,
+        event_tuning: Optional[Dict] = None,
     ) -> None:
         super().__init__()
         self.setWindowTitle("Silver Pose · {0}".format(source_name))
         self.resize(1280, 800)
         self.setStyleSheet(_QSS)
         self.monitor = MonitorTab()
-        self.settings = SettingsTab(draft, env_ready, model_summary, config_path, camera)
+        self.settings = SettingsTab(
+            draft, env_ready, model_summary, config_path, camera, event_tuning
+        )
         tabs = QtWidgets.QTabWidget()
         tabs.setTabPosition(QtWidgets.QTabWidget.North)
         tabs.addTab(self.monitor, "实时监控")