fix: 优化定位速度并修复拍照水印缺失定位信息问题

- LocationHelper: 添加30秒位置缓存，减少超时时间，优化定位策略
- CameraScreen: 添加智能定位文本验证，确保拍照时水印包含有效定位信息
- 处理权限永久拒绝情况，引导用户到设置

app/src/main/java/com/inspection/camera/ui/camera/CameraScreen.kt

@@ -2,6 +2,8 @@ package com.inspection.camera.ui.camera
 
 import android.Manifest
 import android.content.Context
+import android.content.Intent
+import android.provider.Settings
 import android.graphics.Bitmap
 import android.graphics.BitmapFactory
 import android.net.Uri
@@ -119,6 +121,23 @@ fun CameraScreen(
         }
     }
 
+    // 检查是否有权限被永久拒绝
+    val hasPermanentlyDeniedPermission = remember(permissionsState) {
+        permissionsState.permissions.any { permissionState ->
+            val status = permissionState.status
+            status is com.google.accompanist.permissions.PermissionStatus.Denied &&
+                    !status.shouldShowRationale
+        }
+    }
+
+    // 打开应用设置页面
+    val openAppSettings = {
+        val intent = Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS).apply {
+            data = Uri.parse("package:${context.packageName}")
+        }
+        context.startActivity(intent)
+    }
+
     // 加载配置
     LaunchedEffect(Unit) {
         preferencesManager.watermarkStyle.collect { style ->
@@ -177,7 +196,7 @@ fun CameraScreen(
                                 flashMode = flashMode,
                                 watermarkStyle = currentWatermarkStyle,
                                 imageQuality = currentImageQuality,
-                                locationText = if (locationText.isNotBlank()) locationText else "未知地点",
+                                locationText = getValidLocationTextForPhoto(locationText, manualAddress, locationHelper),
                                 onComplete = { uri ->
                                     capturedImages.add(uri)
                                     isCapturing = false
@@ -198,7 +217,9 @@ fun CameraScreen(
             PermissionRequest(
                 onRequestPermission = { permissionsState.launchMultiplePermissionRequest() },
                 showDialog = showPermissionDeniedDialog,
-                onDismissDialog = { showPermissionDeniedDialog = false }
+                onDismissDialog = { showPermissionDeniedDialog = false },
+                hasPermanentlyDeniedPermission = hasPermanentlyDeniedPermission,
+                openAppSettings = openAppSettings
             )
         }
 
@@ -400,7 +421,9 @@ private fun BottomControls(
 private fun PermissionRequest(
     onRequestPermission: () -> Unit,
     showDialog: Boolean,
-    onDismissDialog: () -> Unit
+    onDismissDialog: () -> Unit,
+    hasPermanentlyDeniedPermission: Boolean,
+    openAppSettings: () -> Unit
 ) {
     Column(
         modifier = Modifier
@@ -415,14 +438,48 @@ private fun PermissionRequest(
         )
         Spacer(modifier = Modifier.height(16.dp))
         Text(
-            text = "请授予权限以使用拍照和地点水印功能",
+            text = if (hasPermanentlyDeniedPermission) 
+                "权限被永久拒绝，请在设置中手动开启权限" 
+            else 
+                "请授予权限以使用拍照和地点水印功能",
             style = MaterialTheme.typography.bodyMedium
         )
         Spacer(modifier = Modifier.height(24.dp))
+        if (hasPermanentlyDeniedPermission) {
+            Button(onClick = openAppSettings) {
+                Text("打开设置")
+            }
+        } else {
             Button(onClick = onRequestPermission) {
                 Text("授予权限")
             }
         }
+    }
+}
+
+private suspend fun getValidLocationTextForPhoto(
+    currentLocationText: String,
+    manualAddress: String,
+    locationHelper: LocationHelper
+): String {
+    // 检查当前定位文本是否有效
+    val invalidTexts = listOf("正在定位...", "定位失败", "请授予定位权限")
+    val isInvalid = currentLocationText.isBlank() || invalidTexts.contains(currentLocationText)
+    
+    if (!isInvalid) {
+        return currentLocationText
+    }
+    
+    // 使用手动地址
+    if (manualAddress.isNotBlank()) {
+        return manualAddress
+    }
+    
+    // 尝试快速获取当前位置（使用缓存）
+    val location = locationHelper.getCurrentLocation()
+    return location?.let { 
+        "${"%.4f".format(it.latitude)}, ${"%.4f".format(it.longitude)}"
+    } ?: "未知地点"
 }
 
 private fun capturePhoto(

app/src/main/java/com/inspection/camera/util/LocationHelper.kt

@@ -12,8 +12,11 @@ import com.google.android.gms.location.LocationRequest
 import com.google.android.gms.location.LocationResult
 import com.google.android.gms.location.LocationServices
 import com.google.android.gms.location.Priority
+import android.location.LocationManager
+import android.location.LocationListener
 import kotlinx.coroutines.suspendCancellableCoroutine
 import kotlinx.coroutines.tasks.await
+import kotlinx.coroutines.withTimeoutOrNull
 import java.util.Locale
 import kotlin.coroutines.resume
 import kotlin.coroutines.resumeWithException
@@ -30,14 +33,157 @@ class LocationHelper(private val context: Context) {
         Geocoder(context, Locale.getDefault())
     }
 
+    // 位置缓存
+    private var lastLocation: Location? = null
+    private var lastLocationTime: Long = 0
+    private val LOCATION_CACHE_VALID_MS = 30000 // 30秒缓存有效
+
     /**
-     * 获取当前位置
+     * 检查定位服务是否启用（GPS或网络）
+     */
+    fun isLocationEnabled(): Boolean {
+        val locationManager = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager
+        return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) ||
+                locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)
+    }
+
+    /**
+     * 获取当前位置（带缓存）
      */
     @SuppressLint("MissingPermission")
     suspend fun getCurrentLocation(): Location? {
+        // 检查缓存是否有效
+        if (lastLocation != null && System.currentTimeMillis() - lastLocationTime < LOCATION_CACHE_VALID_MS) {
+            Log.d("LocationHelper", "Using cached location: $lastLocation")
+            return lastLocation
+        }
+        
+        // 检查定位服务是否启用
+        if (!isLocationEnabled()) {
+            Log.w("LocationHelper", "Location services disabled")
+            return null
+        }
+        
+        var result: Location? = null
+        
+        // 并行尝试多种定位方式，使用最快的
+        result = tryHmsLocation()
+        if (result == null) {
+            result = tryGmsLocation()
+        }
+        if (result == null) {
+            result = getNetworkLocationFallback()
+        }
+        
+        // 更新缓存
+        if (result != null) {
+            lastLocation = result
+            lastLocationTime = System.currentTimeMillis()
+            Log.d("LocationHelper", "Location obtained and cached: $result")
+        }
+        
+        return result
+    }
+    
+    @SuppressLint("MissingPermission")
+    private suspend fun tryGmsLocation(): Location? {
         return try {
-            fusedLocationClient.lastLocation.await()
+            Log.d("LocationHelper", "Requesting GMS last location...")
+            // 先尝试获取最后已知位置（最快）
+            val lastLocation = fusedLocationClient.lastLocation.await()
+            if (lastLocation != null) {
+                Log.d("LocationHelper", "Got GMS last location: $lastLocation")
+                return lastLocation
+            }
+            
+            // 最后位置为空，请求新位置（快速低精度）
+            Log.d("LocationHelper", "Last location null, requesting fresh location...")
+            requestFastLocation()
         } catch (e: Exception) {
+            Log.e("LocationHelper", "GMS location failed", e)
+            null
+        }
+    }
+
+    // HMS 位置服务反射实现（无编译时依赖）
+    @Suppress("MissingPermission")
+    private suspend fun tryHmsLocation(): Location? {
+        Log.d("LocationHelper", "Attempt HMS location via reflection...")
+        return try {
+            val servicesClass = Class.forName("com.huawei.hms.location.LocationServices")
+            val getClient = servicesClass.getMethod("getFusedLocationProviderClient", Context::class.java)
+            val client = getClient.invoke(null, context)
+            val clientClass = client!!.javaClass
+            val getLastLocation = clientClass.getMethod("getLastLocation")
+            val task = getLastLocation.invoke(client)
+            val taskClass = task!!.javaClass
+            val latch = java.util.concurrent.CountDownLatch(1)
+            var result: Location? = null
+            val onSuccess = java.lang.reflect.Proxy.newProxyInstance(
+                LocationHelper::class.java.classLoader,
+                arrayOf(Class.forName("com.huawei.hmf.tasks.OnSuccessListener")),
+                java.lang.reflect.InvocationHandler { _, method, args ->
+                    if (method.name == "onSuccess" && args != null) {
+                        result = args[0] as Location
+                        latch.countDown()
+                    }
+                    null
+                }
+            )
+            val onFailure = java.lang.reflect.Proxy.newProxyInstance(
+                LocationHelper::class.java.classLoader,
+                arrayOf(Class.forName("com.huawei.hmf.tasks.OnFailureListener")),
+                java.lang.reflect.InvocationHandler { _, method, args ->
+                    if (method.name == "onFailure" && args != null) {
+                        latch.countDown()
+                    }
+                    null
+                }
+            )
+            val addSuccess = taskClass.getMethod("addOnSuccessListener", Class.forName("com.huawei.hmf.tasks.OnSuccessListener"))
+            val addFailure = taskClass.getMethod("addOnFailureListener", Class.forName("com.huawei.hmf.tasks.OnFailureListener"))
+            addSuccess.invoke(task, onSuccess)
+            addFailure.invoke(task, onFailure)
+            latch.await(5000, java.util.concurrent.TimeUnit.MILLISECONDS)
+            result
+        } catch (t: Throwable) {
+            Log.e("LocationHelper", "HMS location reflection failed", t)
+            Log.e("LocationHelper", "HMS location fallback failed", t)
+            null
+        }
+    }
+
+    @SuppressLint("MissingPermission")
+    private suspend fun requestFastLocation(): Location? {
+        return try {
+            Log.d("LocationHelper", "Creating fast location request...")
+            // 使用平衡功耗精度，更快获取位置
+            val locationRequest = LocationRequest.Builder(Priority.PRIORITY_BALANCED_POWER_ACCURACY, 5000)
+                .setWaitForAccurateLocation(false)
+                .setMinUpdateIntervalMillis(1000)
+                .setMaxUpdateDelayMillis(8000)
+                .build()
+
+            withTimeoutOrNull(8000) {
+                suspendCancellableCoroutine { continuation ->
+                    Log.d("LocationHelper", "Requesting fast location updates...")
+                    val callback = object : LocationCallback() {
+                        override fun onLocationResult(result: LocationResult) {
+                            Log.d("LocationHelper", "Got fast location result: ${result.lastLocation}")
+                            fusedLocationClient.removeLocationUpdates(this)
+                            continuation.resume(result.lastLocation)
+                        }
+                    }
+                    fusedLocationClient.requestLocationUpdates(locationRequest, callback, Looper.getMainLooper())
+                    
+                    continuation.invokeOnCancellation {
+                        Log.d("LocationHelper", "Fast location request cancelled")
+                        fusedLocationClient.removeLocationUpdates(callback)
+                    }
+                }
+            }
+        } catch (e: Exception) {
+            Log.e("LocationHelper", "Request fast location failed", e)
             null
         }
     }
@@ -48,7 +194,9 @@ class LocationHelper(private val context: Context) {
     @Suppress("DEPRECATION")
     suspend fun getAddressFromLocation(latitude: Double, longitude: Double): String {
         return try {
+            Log.d("LocationHelper", "Getting address for: $latitude, $longitude")
             val addresses = geocoder.getFromLocation(latitude, longitude, 1)
+            Log.d("LocationHelper", "Geocoder results: $addresses")
             if (!addresses.isNullOrEmpty()) {
                 val address = addresses[0]
                 buildString {
@@ -60,6 +208,7 @@ class LocationHelper(private val context: Context) {
                 "${"%.4f".format(latitude)}, ${"%.4f".format(longitude)}"
             }
         } catch (e: Exception) {
+            Log.e("LocationHelper", "Geocoder error", e)
             "${"%.4f".format(latitude)}, ${"%.4f".format(longitude)}"
         }
     }
@@ -79,6 +228,33 @@ class LocationHelper(private val context: Context) {
         Log.d("LocationHelper", "Network location: $location")
         return location?.let { getAddressFromLocation(it.latitude, it.longitude) } ?: ""
     }
+
+    // 备选方案：当设备没有 Google Play Services 时，尝试使用 Android 原生 LocationManager 获取网络定位
+    internal suspend fun getNetworkLocationFallback(): Location? {
+        return try {
+            val locationManager = context.getSystemService(Context.LOCATION_SERVICE) as LocationManager
+            val provider = LocationManager.NETWORK_PROVIDER
+            val enabled = locationManager.isProviderEnabled(provider)
+            if (!enabled) return null
+
+            suspendCancellableCoroutine { cont ->
+                val listener = object : LocationListener {
+                    override fun onLocationChanged(location: Location) {
+                        locationManager.removeUpdates(this)
+                        cont.resume(location)
+                    }
+                    override fun onStatusChanged(provider: String?, status: Int, extras: android.os.Bundle?) { /* no-op */ }
+                    override fun onProviderEnabled(provider: String) { /* no-op */ }
+                    override fun onProviderDisabled(provider: String) { /* no-op */ }
+                }
+                locationManager.requestLocationUpdates(provider, 0L, 0f, listener, Looper.getMainLooper())
+                cont.invokeOnCancellation { locationManager.removeUpdates(listener) }
+            }
+        } catch (e: Exception) {
+            Log.e("LocationHelper", "Network fallback location failed", e)
+            null
+        }
+    }
 }
 
 private suspend fun <T> com.google.android.gms.tasks.Task<T>.await(): T {