修改UCD逻辑、添加关闭界面的x

app/ucd/device.py

@@ -156,8 +156,7 @@ class _UcdSdkBackend:
             return True
 
         except Exception as e:
-            self._force_cleanup()
-            self._reinit_tsi_lib()
+            self.hard_reset()
             return False
 
     def close(self):
@@ -168,19 +167,24 @@ class _UcdSdkBackend:
                     self._stop_audio_output()
                 except Exception:
                     pass
-                self._close_device_object(self.dev)
-
-            self._reset_state()
-            self._reinit_tsi_lib()
-            return True
-
-        except Exception as e:
+                try:
+                    self._close_device_object(self.dev)
+                except Exception:
+                    log.exception("UcdSdk.close device object failed")
+        finally:
             self._reset_state()
             try:
                 self._reinit_tsi_lib()
             except Exception:
-                pass
-            return False
+                log.exception("UcdSdk.close reinit failed")
+        return True
+
+    def hard_reset(self) -> None:
+        """丢弃失效句柄并重建 TSI（意外断连后重连前调用）。"""
+        self.dev = None
+        self.role = None
+        self._reset_state()
+        self._reinit_tsi_lib()
 
     def _ensure_tsi_lib(self) -> None:
         if self.lUniTAP is None:
@@ -188,7 +192,13 @@ class _UcdSdkBackend:
 
     def _reinit_tsi_lib(self) -> None:
         """Destroy and recreate TsiLib so the native driver rescans USB devices."""
+        old = self.lUniTAP
         self.lUniTAP = None
+        if old is not None:
+            try:
+                old.cleanup()
+            except Exception:
+                log.exception("UcdSdk._reinit_tsi_lib cleanup failed")
         for _ in range(3):
             gc.collect()
         time.sleep(2.0)
@@ -1068,6 +1078,26 @@ class UCD323Device(IUcdDevice):
             self._info = None
             self._bus.publish(ConnectionChanged(DeviceKind.UCD, False, prev_serial))
 
+    def force_reset(self) -> None:
+        """释放失效的 SDK 句柄，软件状态复位为 CLOSED（意外断连后重连前调用）。"""
+        with self._acquire_device_lock("force_reset"):
+            was_open = self._state != UcdState.CLOSED
+            prev_serial = self._info.serial if self._info else None
+            try:
+                self._sdk.hard_reset()
+            except Exception:  # noqa: BLE001
+                log.exception("UCD force_reset SDK failed")
+            self._state = UcdState.CLOSED
+            self._curr_signal = None
+            self._curr_timing = None
+            self._curr_pattern = None
+            self._last_applied = None
+            self._info = None
+            if was_open:
+                self._bus.publish(
+                    ConnectionChanged(DeviceKind.UCD, False, prev_serial)
+                )
+
     # --- 信号 / 图案配置 ---
 
     def configure(self, signal: SignalFormat, timing: TimingSpec) -> bool: