feat: Linux 真实实现层 — 从存根库变为可用生产力工具

新增 _linux_impl.py (800+行):
- LinuxNetwork: 真实IP/接口/DNS/网关/MAC (ip命令+/proc/net)
- LinuxBluetooth: 真实蓝牙状态/扫描/配对/连接 (bluetoothctl)
- LinuxSensors: 真实温度/CPU频率/风扇 (/sys/class/hwmon)
- LinuxAudio: 真实音量控制/静音 (amixer)
- LinuxClipboard: 真实剪贴板读写 (xclip+tkinter回退)
- LinuxPower: 真实CPU/内存/电池 (psutil+/sys/class/power_supply)
- LinuxLocation: 真实IP地理定位 (ip-api.com)
- LinuxNotify: 真实桌面通知 (notify-send)
- LinuxDisplay: 真实屏幕尺寸/截屏/鼠标位置 (xdotool+X11)
- LinuxUIAutomation: 真实点击/输入/按键/滚动 (xdotool)
- LinuxCamera: 真实摄像头拍照 (opencv/V4L2)
- LinuxProcess: 真实进程列表/系统信息/应用管理 (psutil+/proc)
- LinuxShell: 真实命令执行 (subprocess)

改造10+核心类使用Linux真实实现:
- BluetoothAdapter/SensorManager/AudioManager
- ConnectivityManager/WifiManager/TelephonyManager
- LocationManager/PowerManager/BatteryManager/Build
- ActivityManager/Activity/Toast/Display/ClipboardManager
- NotificationManager

15项真实行为测试全部通过:
- 真实IP: 10.60.218.244
- 真实位置: 北京 39.9042, 116.407
- 真实主机名: work-41-vci-g427c
- 真实内核: 5.15.120.byteatom-ck.14
- 真实内存: 1.8GB/3.8GB
- 真实进程列表

android_pyapi/android/bluetooth.py

@@ -14,6 +14,13 @@ from .._core import (
     _sdcard_root, _app_data_dir, _package_name,
 )
 
+# Linux 真实实现导入
+try:
+    from .._linux_impl import IS_LINUX, LinuxBluetooth, HAS_BLUETOOTHCTL
+    _USE_LINUX = IS_LINUX
+except ImportError:
+    _USE_LINUX = False
+
 
 # ═══════════════════════════════════════════════════════════════
 # BluetoothProfile
@@ -645,14 +652,20 @@ class BluetoothAdapter(Stub):
         return BluetoothAdapter._default_adapter
 
     def isEnabled(self) -> bool:
+        if _USE_LINUX:
+            return LinuxBluetooth.get_state() == LinuxBluetooth.STATE_ON
         return self._enabled
 
     def enable(self) -> bool:
+        if _USE_LINUX:
+            return LinuxBluetooth.enable()
         self._enabled = True
         self._state = self.STATE_ON
         return True
 
     def disable(self) -> bool:
+        if _USE_LINUX:
+            return LinuxBluetooth.disable()
         self._enabled = False
         self._state = self.STATE_OFF
         return True
@@ -668,13 +681,36 @@ class BluetoothAdapter(Stub):
         return True
 
     def getBondedDevices(self) -> Set[BluetoothDevice]:
+        if _USE_LINUX:
+            devices = set()
+            for d in LinuxBluetooth.get_bonded_devices():
+                dev = BluetoothDevice(d.get("address", "00:00:00:00:00:00"))
+                dev._name = d.get("name", "Unknown")
+                dev._bond_state = BluetoothDevice.BOND_BONDED
+                devices.add(dev)
+            return devices
         return set(self._bonded_devices)
 
+    def getBondedDeviceAddresses(self) -> Set[str]:
+        """获取已配对设备地址集合"""
+        if _USE_LINUX:
+            return {d.get("address", "") for d in LinuxBluetooth.get_bonded_devices()}
+        return {d.getAddress() for d in self._bonded_devices}
+
     def startDiscovery(self) -> bool:
+        if _USE_LINUX:
+            try:
+                LinuxBluetooth.scan(timeout=5)
+                return True
+            except Exception:
+                return False
         self._discovering = True
         return True
 
     def cancelDiscovery(self) -> bool:
+        if _USE_LINUX:
+            # bluetoothctl scan off 在 LinuxBluetooth.scan 内部已处理
+            return True
         self._discovering = False
         return True
 
@@ -694,6 +730,8 @@ class BluetoothAdapter(Stub):
         pass
 
     def getState(self) -> int:
+        if _USE_LINUX:
+            return LinuxBluetooth.get_state()
         return self._state
 
     def listenUsingRfcommWithServiceRecord(self, name: str, uuid_str: str) -> BluetoothServerSocket:
@@ -704,6 +742,18 @@ class BluetoothAdapter(Stub):
         return BluetoothServerSocket()
 
     def getRemoteDevice(self, address: str) -> Optional[BluetoothDevice]:
+        if _USE_LINUX:
+            # 从已配对设备中查找
+            for d in LinuxBluetooth.get_bonded_devices():
+                if d.get("address", "").upper() == address.upper():
+                    dev = BluetoothDevice(d.get("address", address))
+                    dev._name = d.get("name", "Unknown")
+                    dev._bond_state = BluetoothDevice.BOND_BONDED
+                    return dev
+            # 未配对但地址合法则返回一个设备对象
+            if BluetoothAdapter.checkBluetoothAddress(address):
+                return BluetoothDevice(address)
+            return None
         if not BluetoothAdapter.checkBluetoothAddress(address):
             return None
         return BluetoothDevice(address)