feat(web,android): 看板拖拽、详情侧栏编辑、快速录入与安卓任务列表

Web:
- 看板四列可拖拽，非法流转当场说明原因；勾选后可批量移动
- 详情侧栏全部可编辑（标题/优先级/截止/标签/备注/评论），409 自动刷新
- 快速录入 #标签 !优先级；键盘流 j/k、Enter、e、Esc
- Playwright 真浏览器 e2e 7 项断言全绿（web/e2e/smoke.mjs）
- 1000 条任务实测首屏 P50 38-55ms

Android（未编译验证：本机无 JDK/Gradle）:
- 任务列表/详情/勾选完成/快速新建，冲突时提示并刷新
- 修：User/Member 字段名与后端 nickmame/phone 对齐，原先必然反序列化失败

android/app/src/main/java/com/dadao/task/MainActivity.kt

@@ -15,9 +15,11 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import com.dadao.task.data.Api
 import com.dadao.task.data.TokenStore
+import com.dadao.task.data.Workspace
 import com.dadao.task.ui.DadaoTheme
 import com.dadao.task.ui.HomeScreen
 import com.dadao.task.ui.LoginScreen
+import com.dadao.task.ui.TaskListScreen
 
 class MainActivity : ComponentActivity() {
 
@@ -33,7 +35,7 @@ class MainActivity : ComponentActivity() {
     }
 }
 
-private enum class Screen { Splash, Login, Home }
+private enum class Screen { Splash, Login, Home, Tasks }
 
 @Composable
 private fun AppRoot() {
@@ -41,6 +43,7 @@ private fun AppRoot() {
     val tokens = remember { TokenStore(context) }
     val api = remember { Api(tokens) }
     var screen by remember { mutableStateOf(if (tokens.isLoggedIn) Screen.Splash else Screen.Login) }
+    var current by remember { mutableStateOf<Workspace?>(null) }
 
     // 有本地令牌就先静默校验一次：令牌过期/被吊销要退回登录页，而不是进了主页再崩。
     LaunchedEffect(screen) {
@@ -64,6 +67,18 @@ private fun AppRoot() {
                 tokens.clear()
                 screen = Screen.Login
             },
+            onOpenWorkspace = { ws ->
+                current = ws
+                screen = Screen.Tasks
+            },
         )
+        Screen.Tasks -> {
+            val ws = current
+            if (ws == null) {
+                screen = Screen.Home
+            } else {
+                TaskListScreen(api = api, workspace = ws, onBack = { screen = Screen.Home })
+            }
+        }
     }
 }