fix: 通知自检卡片拼接bug（通道状态被吞）；新增测试通知与通道修复

app/build.gradle.kts

@@ -13,8 +13,8 @@ android {
         applicationId = "com.smbfast.app"
         minSdk = 26
         targetSdk = 35
-        versionCode = 25
+        versionCode = 26
-        versionName = "1.21.0"
+        versionName = "1.21.1"
     }
 
     signingConfigs {

app/src/main/java/com/smbfast/app/transfer/TransferService.kt

@@ -106,10 +106,7 @@ class TransferService : Service() {
 
     private fun createChannel() {
         if (Build.VERSION.SDK_INT >= 26) {
-            val ch = NotificationChannel(CHANNEL_ID, "传输进度", NotificationManager.IMPORTANCE_LOW)
+            createChannelStatic(this)
-            ch.description = "SMB 后台传输进行中"
-            ch.setShowBadge(false)
-            getSystemService(NotificationManager::class.java).createNotificationChannel(ch)
         }
     }
 
@@ -323,6 +320,43 @@ class TransferService : Service() {
         /** 岛参数模式：极简（仅 baseInfo/ticker，无岛结构，白名单实验二） */
         const val MODE_MINIMAL = "minimal"
 
+        private const val NOTIF_ID_TEST = 1002
+
+        private fun createChannelStatic(ctx: Context) {
+            val ch = NotificationChannel(CHANNEL_ID, "传输进度", NotificationManager.IMPORTANCE_LOW)
+            ch.description = "SMB 后台传输进行中"
+            ch.setShowBadge(false)
+            ctx.getSystemService(NotificationManager::class.java).createNotificationChannel(ch)
+        }
+
+        /**
+         * 发一条独立 id 的测试通知：验证通道级可见性（应用权限"已授予"不代表通道没被系统屏蔽）。
+         * 返回是否发送成功。
+         */
+        fun sendTestNotification(ctx: Context): Boolean {
+            if (Build.VERSION.SDK_INT >= 26) createChannelStatic(ctx)
+            val time = java.text.SimpleDateFormat("HH:mm:ss", java.util.Locale.CHINA)
+                .format(java.util.Date())
+            val n = NotificationCompat.Builder(ctx, CHANNEL_ID)
+                .setSmallIcon(R.mipmap.ic_launcher)
+                .setContentTitle("SMBFast 测试通知")
+                .setContentText("看到这条即通道可见 · $time")
+                .setOngoing(false)
+                .setAutoCancel(true)
+                .build()
+            return runCatching {
+                NotificationManagerCompat.from(ctx).notify(NOTIF_ID_TEST, n)
+                true
+            }.getOrDefault(false)
+        }
+
+        /** 通道一旦被用户/系统屏蔽，应用无法改回；删除重建可恢复默认重要性 */
+        fun repairChannel(ctx: Context) {
+            val nm = ctx.getSystemService(NotificationManager::class.java)
+            runCatching { nm.deleteNotificationChannel(CHANNEL_ID) }
+            if (Build.VERSION.SDK_INT >= 26) createChannelStatic(ctx)
+        }
+
         /** 有任务入队时调用；须在应用处于前台时启动（前台服务启动限制） */
         fun start(ctx: Context) {
             ContextCompat.startForegroundService(ctx, Intent(ctx, TransferService::class.java))

app/src/main/java/com/smbfast/app/ui/screens/SettingsScreen.kt

@@ -316,11 +316,13 @@ private fun currentVersionCode(): Long {
     }
 }
 
-/** 通知系统自检：应用通知权限/通道被关是"通知和灵动岛全都不显示"的最常见原因 */
+/** 通知系统自检：通道被系统屏蔽是"通知和灵动岛全都不显示"的常见原因（应用权限显示正常也未必可见） */
 @Composable
 private fun NotificationDiagCard() {
     val ctx = LocalContext.current
-    val (enabled, hasChannel, importance) = remember {
+    var refresh by remember { mutableStateOf(0) }
+    var msg by remember { mutableStateOf<String?>(null) }
+    val (enabled, hasChannel, importance) = remember(refresh) {
         val nm = androidx.core.app.NotificationManagerCompat.from(ctx)
         val ch = nm.getNotificationChannel("smbfast_transfers")
         Triple(nm.areNotificationsEnabled(), ch != null, ch?.importance ?: -1)
@@ -328,7 +330,7 @@ private fun NotificationDiagCard() {
     val impText = when {
         !hasChannel -> "未创建"
         importance == -1 -> "未创建"
-        importance == 0 -> "已屏蔽（不显示）"
+        importance == 0 -> "已被屏蔽（通知完全不显示！）"
         importance == 1 -> "MIN（通知栏不显示）"
         importance == 2 -> "LOW（静默显示在通知栏，无横幅）"
         importance == 3 -> "DEFAULT"
@@ -338,11 +340,28 @@ private fun NotificationDiagCard() {
         icon = Icons.Default.Notifications,
         brush = Neon.File,
         title = "通知系统自检",
-        subtitle = "系统通知权限：" + if (enabled) "已授予" else "已被关闭！通知与灵动岛都不会显示" +
+        subtitle = "系统通知权限：" + (if (enabled) "已授予" else "已被关闭！通知与灵动岛都不会显示") +
             "\n通知通道「传输进度」：" + impText,
     ) {
-        if (!enabled) {
         Spacer(Modifier.height(8.dp))
+        Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+            MiniChip("发测试通知") {
+                msg = runCatching {
+                    com.smbfast.app.transfer.TransferService.sendTestNotification(ctx)
+                    "已发出，看状态栏/通知栏是否出现（时间戳区分新旧）"
+                }.getOrElse { "发送失败：${it.message}" }
+                refresh++
+            }
+            if (hasChannel && importance <= 1) {
+                MiniChip("修复通知通道") {
+                    msg = runCatching {
+                        com.smbfast.app.transfer.TransferService.repairChannel(ctx)
+                        "通道已删除并按默认重建，请再点「发测试通知」验证"
+                    }.getOrElse { "修复失败：${it.message}" }
+                    refresh++
+                }
+            }
+            if (!enabled) {
                 MiniChip("去开启通知权限") {
                     runCatching {
                         ctx.startActivity(
@@ -353,19 +372,11 @@ private fun NotificationDiagCard() {
                     }
                 }
             }
-        if (hasChannel && importance == 0) {
+        }
+        val m = msg
+        if (m != null) {
             Spacer(Modifier.height(8.dp))
-            MiniChip("去修复通知通道") {
+            Text(m, color = Neon.TextDim, fontSize = 11.sp, lineHeight = 15.sp)
-                runCatching {
-                    ctx.startActivity(
-                        android.content.Intent(
-                            android.provider.Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS,
-                        )
-                            .putExtra(android.provider.Settings.EXTRA_APP_PACKAGE, ctx.packageName)
-                            .putExtra(android.provider.Settings.EXTRA_CHANNEL_ID, "smbfast_transfers"),
-                    )
-                }
-            }
         }
     }
 }