fix(android): 顶部未读入口补图标并可点进通知页

右上角之前只有一个未读数徽标，没有铃铛也不响应点击。改成常驻铃铛（未读时加深、红点计数），点击切到通知 tab，触控区 40dp。版本 0.5.1（versionCode 6）。

android/app/build.gradle.kts

@@ -27,8 +27,8 @@ android {
         minSdk = 26
         targetSdk = 35
         // 版本号是 OTA 的唯一判据：后端只比对 version_code，改这里才算"有新版本"
-        versionCode = 5
+        versionCode = 6
-        versionName = "0.5.0"
+        versionName = "0.5.1"
         buildConfigField("String", "API_BASE", "\"$apiBase\"")
     }
 

android/app/src/main/java/com/dadao/task/ui/AppFrame.kt

@@ -12,6 +12,7 @@ import androidx.compose.foundation.layout.statusBarsPadding
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.offset
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
@@ -30,11 +31,13 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
 import com.dadao.task.data.Workspace
 
 /** 手机端的去处。看板不是独立入口，而是任务页顶部的一个切换（屏幕太窄，塞不下更多 tab）。 */
@@ -93,21 +96,40 @@ fun WorkspaceScaffold(
                     modifier = Modifier.clickable { onBackHome() },
                 )
             }
+            // 未读入口：铃铛常驻，红点只表达"有事没看"。
+            // 之前这里只有一个光秃秃的数字，既没有图标也点不动，等于把入口做成了装饰。
+            Box(
+                Modifier
+                    .size(40.dp)
+                    .clip(RoundedCornerShape(10.dp))
+                    .clickable { onTab(WorkspaceTab.Notifications) },
+                contentAlignment = Alignment.Center,
+            ) {
+                Icon(
+                    Icons.Filled.Notifications,
+                    contentDescription = if (unread > 0) "通知，$unread 条未读" else "通知",
+                    tint = if (unread > 0) Ink else InkMuted,
+                    modifier = Modifier.size(23.dp),
+                )
                 if (unread > 0) {
                     Box(
                         Modifier
+                            .align(Alignment.TopEnd)
+                            .offset(x = 2.dp, y = 4.dp)
                             .background(Clay, CircleShape)
-                        .padding(horizontal = 7.dp, vertical = 2.dp),
+                            .padding(horizontal = 5.dp, vertical = 1.dp),
                     ) {
                         Text(
                             if (unread > 99) "99+" else unread.toString(),
                             style = MaterialTheme.typography.labelSmall,
+                            fontSize = 10.sp,
                             color = Color.White,
                             fontWeight = FontWeight.SemiBold,
                         )
                     }
                 }
             }
+        }
 
         Box(Modifier.weight(1f).fillMaxWidth()) { content() }