Harden Android privacy and network flow

HISTORY/2026-08-28-obdai-receipt.md

@@ -10,6 +10,15 @@
 - Проверка `:app:testDebugUnitTest :app:assembleDebug` завершилась `BUILD SUCCESSFUL`.
 - Версия Android-приложения повышена до `0.1.4`.
 
+## 2026-08-29: Code review fixes
+
+- Добавлено разрешение `INTERNET`; для OkHttp заданы connect/read/call timeouts.
+- Аналитические Bitmap больше не рисуются поверх live preview на каждом кадре.
+- YUV-конвертация учитывает `rowStride`, `pixelStride` и rotation; старые live-кадры освобождаются.
+- Добавлен локальный privacy gate: признаки ФИО, пациента или даты блокируют отправку.
+- ML Kit различает найденную зону, отсутствие текста и `PrivacyBlocked`.
+- Unit-тесты и `assembleDebug` для версии `0.1.5` завершились успешно.
+
 ## 2026-08-28
 
 ### Вопрос

android-app/app/build.gradle.kts

@@ -12,8 +12,8 @@ android {
         applicationId = "ru.obdai.receipt"
         minSdk = 26
         targetSdk = 35
-        versionCode = 5
-        versionName = "0.1.4"
+        versionCode = 6
+        versionName = "0.1.5"
 
         val apiToken = providers.environmentVariable("RECEIPT_API_TOKEN").orNull ?: ""
         buildConfigField("String", "RECEIPT_API_TOKEN", "\"${apiToken.replace("\\", "\\\\").replace("\"", "\\\"")}\"")

android-app/app/src/main/AndroidManifest.xml

@@ -1,5 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.INTERNET" />
 
     <application
         android:allowBackup="false"

android-app/app/src/main/java/ru/obdai/receipt/MainActivity.kt

@@ -168,6 +168,9 @@ private fun CameraScreen(
                 else Text(if (bounds == null) "Найти и распознать препараты" else "Распознать crop")
             }
             if (state is UiState.Error) Text(state.message, color = Color.Red)
+            if (state is UiState.PrivacyBlocked) {
+                Text("Обнаружены данные пациента. Отправка заблокирована.", color = Color.Red)
+            }
             if (state is UiState.Result) Text(state.text, color = Color.Red, modifier = Modifier.padding(24.dp))
         }
         if (capturedBitmap != null && bounds != null) {
@@ -181,11 +184,7 @@ private fun CameraScreen(
                 )
             )
         }
-        if (state is UiState.Result) {
-            ResultOverlay(state.bitmap, state.text)
-        } else if (bitmap != null) {
-            ResultOverlay(bitmap, "")
-        }
+        if (state is UiState.Result) ResultOverlay(state.bitmap, state.text)
     }
 }
 

android-app/app/src/main/java/ru/obdai/receipt/crop/MedicationZoneDetector.kt

@@ -7,25 +7,45 @@ import com.google.mlkit.vision.text.TextRecognition
 import com.google.mlkit.vision.text.latin.TextRecognizerOptions
 import kotlinx.coroutines.suspendCancellableCoroutine
 import kotlin.coroutines.resume
+import java.util.regex.Pattern
+
+sealed interface ZoneDetection {
+    data class Found(val bounds: Rect) : ZoneDetection
+    data object NoText : ZoneDetection
+    data object PatientDataDetected : ZoneDetection
+}
 
 class MedicationZoneDetector {
     private val recognizer = TextRecognition.getClient(TextRecognizerOptions.DEFAULT_OPTIONS)
 
-    suspend fun detect(bitmap: Bitmap): Rect? = suspendCancellableCoroutine { continuation ->
+    suspend fun detect(bitmap: Bitmap): ZoneDetection = suspendCancellableCoroutine { continuation ->
         recognizer.process(InputImage.fromBitmap(bitmap, 0))
             .addOnSuccessListener { result ->
+                val text = result.text
+                if (containsPatientData(text)) {
+                    continuation.resume(ZoneDetection.PatientDataDetected)
+                    return@addOnSuccessListener
+                }
                 val blocks = result.textBlocks
                     .map { it.boundingBox }
                     .filterNotNull()
                     .filter { it.top > bitmap.height / 5 }
-                continuation.resume(blocks.reduceOrNull { first, next ->
+                val bounds = blocks.reduceOrNull { first, next ->
                     Rect(first).apply { union(next) }
-                })
+                }
+                continuation.resume(bounds?.let(ZoneDetection::Found) ?: ZoneDetection.NoText)
             }
-            .addOnFailureListener { continuation.resume(null) }
+            .addOnFailureListener { continuation.resume(ZoneDetection.NoText) }
     }
 
     fun close() {
         recognizer.close()
     }
+
+    private fun containsPatientData(text: String): Boolean {
+        val normalized = text.lowercase()
+        val date = Pattern.compile("""\b\d{1,2}[./-]\d{1,2}[./-]\d{2,4}\b""").matcher(normalized).find()
+        val labels = listOf("ф.и.о", "фамилия", "имя", "отчество", "дата рождения", "пациент")
+        return date || labels.any(normalized::contains)
+    }
 }

android-app/app/src/main/java/ru/obdai/receipt/network/ApiClient.kt

@@ -7,6 +7,7 @@ import okhttp3.MultipartBody
 import okhttp3.OkHttpClient
 import okhttp3.Request
 import okhttp3.RequestBody.Companion.toRequestBody
+import java.util.concurrent.TimeUnit
 
 @Serializable
 data class ReceiptResponse(val text: String? = null, val usage: Usage? = null)
@@ -17,7 +18,11 @@ data class Usage(val promptTokens: Int? = null, val candidatesTokens: Int? = nul
 class ApiClient(
     private val endpoint: String,
     private val token: String,
-    private val client: OkHttpClient = OkHttpClient()
+    private val client: OkHttpClient = OkHttpClient.Builder()
+        .connectTimeout(15, TimeUnit.SECONDS)
+        .readTimeout(120, TimeUnit.SECONDS)
+        .callTimeout(150, TimeUnit.SECONDS)
+        .build()
 ) {
     private val json = Json { ignoreUnknownKeys = true }
 

android-app/app/src/main/java/ru/obdai/receipt/viewmodel/ReceiptViewModel.kt

@@ -8,11 +8,13 @@ import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.launch
 import ru.obdai.receipt.crop.MedicationZoneDetector
+import ru.obdai.receipt.crop.ZoneDetection
 import ru.obdai.receipt.network.ApiClient
 
 sealed interface UiState {
     data object Idle : UiState
     data object Analyzing : UiState
+    data object PrivacyBlocked : UiState
     data class Result(val bitmap: Bitmap, val text: String) : UiState
     data class Error(val message: String) : UiState
 }
@@ -41,7 +43,14 @@ class ReceiptViewModel(
 
     fun detectZone(bitmap: Bitmap, onDetected: (android.graphics.Rect?) -> Unit) {
         viewModelScope.launch(Dispatchers.Default) {
-            onDetected(zoneDetector.detect(bitmap))
+            when (val detection = zoneDetector.detect(bitmap)) {
+                is ZoneDetection.Found -> onDetected(detection.bounds)
+                ZoneDetection.PatientDataDetected -> {
+                    _state.value = UiState.PrivacyBlocked
+                    onDetected(null)
+                }
+                ZoneDetection.NoText -> onDetected(null)
+            }
         }
     }