feat(bugcollect): 使用 deviceId 作为 userId 兜底，保障影响设备数统计

- XuqmSDK 新增 deviceId 属性：首次生成 UUID 存入 SharedPreferences，后续不变
- BugCollect 上报事件时 userId 改为 getUserId() ?: deviceId，未登录也能统计影响设备数
- BugCollectInitProvider 崩溃拦截同步使用 deviceId 兜底

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

sdk-bugcollect/src/main/java/com/xuqm/sdk/bugcollect/BugCollect.kt

@@ -45,7 +45,7 @@ object BugCollect {
         if (!isReady()) return
         queue().push(LogEvent(
             name = name, properties = properties,
-            appKey = XuqmSDK.appKey, userId = XuqmSDK.getUserId(),
+            appKey = XuqmSDK.appKey, userId = XuqmSDK.getUserId() ?: XuqmSDK.deviceId,
             platform = "android", release = appVersion(), environment = environment,
             sdk = IssueEvent.SdkInfo(SDK_NAME, SDK_VERSION),
         ))
@@ -73,8 +73,8 @@ object BugCollect {
             breadcrumbs = crumbs,
             release = appVersion(),
             environment = environment,
-            userId = XuqmSDK.getUserId(),
-            user = IssueEvent.UserInfo(id = XuqmSDK.getUserId()),
+            userId = XuqmSDK.getUserId() ?: XuqmSDK.deviceId,
+            user = IssueEvent.UserInfo(id = XuqmSDK.getUserId() ?: XuqmSDK.deviceId),
             device = buildDeviceInfo(),
             tags = tags,
         ))
@@ -100,8 +100,8 @@ object BugCollect {
             breadcrumbs = crumbs,
             release = appVersion(),
             environment = environment,
-            userId = XuqmSDK.getUserId(),
-            user = IssueEvent.UserInfo(id = XuqmSDK.getUserId()),
+            userId = XuqmSDK.getUserId() ?: XuqmSDK.deviceId,
+            user = IssueEvent.UserInfo(id = XuqmSDK.getUserId() ?: XuqmSDK.deviceId),
             device = buildDeviceInfo(),
             tags = tags,
         ))
@@ -118,8 +118,8 @@ object BugCollect {
             exception = IssueEvent.ExceptionInfo(type = "Warning", value = message),
             release = appVersion(),
             environment = environment,
-            userId = XuqmSDK.getUserId(),
-            user = IssueEvent.UserInfo(id = XuqmSDK.getUserId()),
+            userId = XuqmSDK.getUserId() ?: XuqmSDK.deviceId,
+            user = IssueEvent.UserInfo(id = XuqmSDK.getUserId() ?: XuqmSDK.deviceId),
             tags = tags,
         ))
     }
@@ -141,7 +141,7 @@ object BugCollect {
         CrashCapture.start(
             appContext = XuqmSDK.appContext,
             appKey = XuqmSDK.appKey,
-            getUserId = { XuqmSDK.getUserId() },
+            getUserId = { XuqmSDK.getUserId() ?: XuqmSDK.deviceId },
         )
         queue().uploadPendingCrashes()
     }

sdk-bugcollect/src/main/java/com/xuqm/sdk/bugcollect/internal/BugCollectInitProvider.kt

@@ -40,7 +40,7 @@ internal class BugCollectInitProvider : ContentProvider() {
         CrashCapture.start(
             appContext = ctx,
             appKey = XuqmSDK.appKey,
-            getUserId = { XuqmSDK.getUserId() },
+            getUserId = { XuqmSDK.getUserId() ?: XuqmSDK.deviceId },
         )
 
         // ── Phase 2：远端配置就绪后上传 ─────────────────────────────────────────

sdk-core/src/main/java/com/xuqm/sdk/XuqmSDK.kt

@@ -43,6 +43,11 @@ object XuqmSDK {
 
     /** 初始化时使用的平台地址（同步可用，远端配置到达前即有值）。 */
     val platformUrl: String get() = resolvedPlatformUrl
+
+    /** 持久设备 ID（UUID，首次生成后永不变更）。未上报 userId 的场景可用此 ID 追踪影响设备数。 */
+    @Volatile var deviceId: String = ""
+        private set
+
     @Volatile private var loginSession: XuqmLoginSession? = null
     @Volatile private var userInfoValue: XuqmUserInfo? = null
     @Volatile var platformConfig: SdkPlatformConfig? = null
@@ -121,6 +126,7 @@ object XuqmSDK {
             config = SDKConfig(appKey, logLevel)
             appContext = applicationContext
             tokenStore = TokenStore(applicationContext)
+            deviceId = resolveDeviceId(applicationContext)
             ApiClient.init(config, tokenStore)
             initializedAppKey = appKey
             initialized = true
@@ -217,6 +223,16 @@ object XuqmSDK {
         )
     }
 
+    private fun resolveDeviceId(context: Context): String {
+        val prefs = context.getSharedPreferences("xuqm_sdk_core", android.content.Context.MODE_PRIVATE)
+        val key = "device_id"
+        val stored = prefs.getString(key, null)
+        if (!stored.isNullOrBlank()) return stored
+        val generated = java.util.UUID.randomUUID().toString()
+        prefs.edit().putString(key, generated).apply()
+        return generated
+    }
+
     private fun platformInitException(platformUrl: String, appKey: String, cause: Throwable): Throwable {
         val kind = if (platformUrl == DEFAULT_PLATFORM_URL) "公有平台" else "私有化平台 $platformUrl"
         return IllegalStateException(