fix(t209): retain login inputs after failure

android-buyer/app/src/main/java/com/roubao/autopilot/MainActivity.kt

@@ -358,9 +358,7 @@ class MainActivity : ComponentActivity() {
                                 state = procurementState,
                                 readiness = readiness,
                                 onLogin = { input: LoginInput ->
-                                    lifecycleScope.launch {
-                                        procurementRepository.login(input)
-                                    }
+                                    procurementRepository.login(input)
                                 },
                                 onClaim = {
                                     lifecycleScope.launch {

android-buyer/app/src/main/java/com/roubao/autopilot/ui/screens/ProcurementScreen.kt

@@ -34,6 +34,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableLongStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -50,12 +51,13 @@ import com.roubao.autopilot.readiness.DeviceReadinessSnapshot
 import com.roubao.autopilot.ui.theme.BaoziTheme
 import java.time.Instant
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
 
 @Composable
 fun ProcurementScreen(
     state: ProcurementUiState,
     readiness: DeviceReadinessSnapshot,
-    onLogin: (LoginInput) -> Unit,
+    onLogin: suspend (LoginInput) -> Boolean,
     onClaim: () -> Unit,
     onStart: (ExecutionMode) -> Unit,
     onRelease: () -> Unit,
@@ -260,9 +262,10 @@ private fun ExecutionModeSelector(
 @Composable
 private fun LoginSection(
     state: ProcurementUiState,
-    onLogin: (LoginInput) -> Unit
+    onLogin: suspend (LoginInput) -> Boolean
 ) {
     val colors = BaoziTheme.colors
+    val coroutineScope = rememberCoroutineScope()
     var backendUrl by remember(state.profile.backendUrl) {
         mutableStateOf(state.profile.backendUrl)
     }
@@ -274,6 +277,7 @@ private fun LoginSection(
         mutableStateOf(state.profile.deviceId)
     }
     var deviceToken by remember { mutableStateOf("") }
+    var submitting by remember { mutableStateOf(false) }
 
     Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
         Text(
@@ -329,19 +333,28 @@ private fun LoginSection(
         )
         Button(
             onClick = {
-                onLogin(
-                    LoginInput(
+                if (!submitting) {
+                    val input = LoginInput(
                         backendUrl = backendUrl,
                         username = username,
                         password = password,
                         deviceId = deviceId,
                         deviceToken = deviceToken
                     )
-                )
-                password = ""
-                deviceToken = ""
+                    submitting = true
+                    coroutineScope.launch {
+                        try {
+                            if (onLogin(input)) {
+                                password = ""
+                                deviceToken = ""
+                            }
+                        } finally {
+                            submitting = false
+                        }
+                    }
+                }
             },
-            enabled = !state.busy,
+            enabled = !state.busy && !submitting,
             modifier = Modifier.fillMaxWidth()
         ) {
             Icon(Icons.Filled.Lock, contentDescription = null)