release: v0.1.4 — onglet Journal (diagnostic VPN), limitation des applications (plages horaires, temps d'écran)

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/src/main/java/com/jttools/datacontrol/DataControlApp.kt

@@ -20,6 +20,7 @@ class DataControlApp : Application() {
 
     override fun onCreate() {
         super.onCreate()
+        com.jttools.datacontrol.log.AppLog.init(this)
         CoroutineScope(Dispatchers.IO).launch { settingsRepository.resetPasswordOnce() }
         // Filet de sécurité : relance périodiquement DataMonitorService s'il a été tué en arrière-plan.
         // enqueueUniquePeriodicWork + KEEP : sans effet si déjà planifié, donc sûr à appeler à chaque démarrage.

app/src/main/java/com/jttools/datacontrol/data/AppSettings.kt

@@ -27,7 +27,9 @@ data class AppSettings(
     val familyId: String? = null,
     val deviceId: String? = null,
     /** Horodatage (ms) de la dernière configuration distante appliquée. */
-    val remoteConfigVersion: Long = 0L
+    val remoteConfigVersion: Long = 0L,
+    /** Règles d'usage (plages horaires, limites de temps, applications interdites), au format JSON. */
+    val rulesJson: String? = null
 ) {
     val isPaired: Boolean get() = !familyId.isNullOrEmpty() && !deviceId.isNullOrEmpty()
 

app/src/main/java/com/jttools/datacontrol/data/SettingsRepository.kt

@@ -45,6 +45,9 @@ class SettingsRepository @Inject constructor(
         val FAMILY_ID = stringPreferencesKey("family_id")
         val DEVICE_ID = stringPreferencesKey("device_id")
         val REMOTE_CONFIG_VERSION = longPreferencesKey("remote_config_version")
+        val RULES_JSON = stringPreferencesKey("rules_json")
+        val USAGE_DAY = stringPreferencesKey("usage_day")
+        val USAGE_JSON = stringPreferencesKey("usage_json")
         val TRAFFIC_DAY = stringPreferencesKey("traffic_day")
         val TRAFFIC_MOBILE_ACC = longPreferencesKey("traffic_mobile_acc")
         val TRAFFIC_WIFI_ACC = longPreferencesKey("traffic_wifi_acc")
@@ -74,7 +77,8 @@ class SettingsRepository @Inject constructor(
             cutoffPulseStartMillis = prefs[Keys.CUTOFF_PULSE_START_MILLIS] ?: defaults.cutoffPulseStartMillis,
             familyId = prefs[Keys.FAMILY_ID],
             deviceId = prefs[Keys.DEVICE_ID],
-            remoteConfigVersion = prefs[Keys.REMOTE_CONFIG_VERSION] ?: defaults.remoteConfigVersion
+            remoteConfigVersion = prefs[Keys.REMOTE_CONFIG_VERSION] ?: defaults.remoteConfigVersion,
+            rulesJson = prefs[Keys.RULES_JSON]
         )
     }
 
@@ -205,6 +209,7 @@ class SettingsRepository @Inject constructor(
                 it.remove(Keys.FAMILY_ID)
                 it.remove(Keys.DEVICE_ID)
                 it.remove(Keys.REMOTE_CONFIG_VERSION)
+                it.remove(Keys.RULES_JSON)
             } else {
                 it[Keys.FAMILY_ID] = familyId
                 it[Keys.DEVICE_ID] = deviceId
@@ -225,10 +230,12 @@ class SettingsRepository @Inject constructor(
         whitelistedPackagesWifi: Set<String>?,
         wifiFilterEnabled: Boolean?,
         planLimitMo: Long?,
-        cutoffIntervalMinutes: Int?
+        cutoffIntervalMinutes: Int?,
+        rulesJson: String?
     ) {
         context.dataStore.edit { prefs ->
             if ((prefs[Keys.REMOTE_CONFIG_VERSION] ?: 0L) >= version) return@edit
+            rulesJson?.let { prefs[Keys.RULES_JSON] = it }
             prefs[Keys.REMOTE_CONFIG_VERSION] = version
             controlEnabled?.let { prefs[Keys.CONTROL_ENABLED] = it }
             whitelistedPackages?.let { prefs[Keys.WHITELISTED_PACKAGES] = it }
@@ -265,4 +272,18 @@ class SettingsRepository @Inject constructor(
         }
         return result
     }
+
+    suspend fun loadUsage(): Pair<String, String>? {
+        val prefs = context.dataStore.data.first()
+        val day = prefs[Keys.USAGE_DAY] ?: return null
+        val json = prefs[Keys.USAGE_JSON] ?: return null
+        return day to json
+    }
+
+    suspend fun saveUsage(day: String, json: String) {
+        context.dataStore.edit {
+            it[Keys.USAGE_DAY] = day
+            it[Keys.USAGE_JSON] = json
+        }
+    }
 }

app/src/main/java/com/jttools/datacontrol/guard/AppGuardService.kt

@@ -0,0 +1,131 @@
+package com.jttools.datacontrol.guard
+
+import android.accessibilityservice.AccessibilityService
+import android.content.BroadcastReceiver
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.content.pm.PackageManager
+import android.os.PowerManager
+import android.provider.Settings
+import android.telecom.TelecomManager
+import android.view.accessibility.AccessibilityEvent
+import android.view.inputmethod.InputMethodManager
+import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+/**
+ * Détecte l'application au premier plan (service d'accessibilité, sans lire le contenu des écrans)
+ * pour appliquer les règles de [GuardEngine] : interdiction, plages horaires, limites de temps.
+ * Un blocage renvoie à l'accueil et affiche [BlockedActivity].
+ */
+@AndroidEntryPoint
+class AppGuardService : AccessibilityService() {
+
+    @Inject lateinit var engine: GuardEngine
+
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.Main)
+    private var exempt: Set<String> = emptySet()
+    private var exemptComputedAt = 0L
+    private var currentPkg: String? = null
+    private var lastBlockAt = 0L
+
+    private val screenReceiver = object : BroadcastReceiver() {
+        override fun onReceive(context: Context?, intent: Intent?) {
+            engine.onScreen(intent?.action != Intent.ACTION_SCREEN_OFF)
+        }
+    }
+
+    override fun onServiceConnected() {
+        super.onServiceConnected()
+        engine.start()
+        engine.onScreen(getSystemService(PowerManager::class.java).isInteractive)
+        registerReceiver(screenReceiver, IntentFilter().apply {
+            addAction(Intent.ACTION_SCREEN_ON)
+            addAction(Intent.ACTION_SCREEN_OFF)
+        })
+        scope.launch {
+            // Réévalue l'application courante : la limite peut être atteinte pendant l'utilisation.
+            while (isActive) {
+                delay(CHECK_INTERVAL_MS)
+                engine.tick()
+                currentPkg?.let { enforce(it) }
+            }
+        }
+    }
+
+    override fun onAccessibilityEvent(event: AccessibilityEvent?) {
+        if (event?.eventType != AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) return
+        val pkg = event.packageName?.toString() ?: return
+        if (pkg in exemptPackages()) {
+            currentPkg = null
+            engine.onForeground(null)
+            return
+        }
+        currentPkg = pkg
+        engine.onForeground(pkg)
+        enforce(pkg)
+    }
+
+    private fun enforce(pkg: String) {
+        val block = engine.check(pkg) ?: return
+        val now = System.currentTimeMillis()
+        if (now - lastBlockAt < 2_000) return
+        lastBlockAt = now
+        performGlobalAction(GLOBAL_ACTION_HOME)
+        val label = runCatching {
+            packageManager.getApplicationLabel(packageManager.getApplicationInfo(pkg, 0)).toString()
+        }.getOrDefault(pkg)
+        startActivity(BlockedActivity.intent(this, label, block.message))
+    }
+
+    /** Applications jamais bloquées ni comptées : sans elles l'appareil deviendrait inutilisable. */
+    private fun exemptPackages(): Set<String> {
+        val now = System.currentTimeMillis()
+        if (exempt.isNotEmpty() && now - exemptComputedAt < EXEMPT_TTL_MS) return exempt
+        val set = mutableSetOf(packageName, "android", "com.android.systemui", "com.android.phone", "com.android.emergency")
+        runCatching {
+            val home = Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME)
+            packageManager.queryIntentActivities(home, PackageManager.MATCH_DEFAULT_ONLY)
+                .forEach { set += it.activityInfo.packageName }
+        }
+        runCatching { getSystemService(TelecomManager::class.java).defaultDialerPackage?.let { set += it } }
+        runCatching {
+            getSystemService(InputMethodManager::class.java).enabledInputMethodList.forEach { set += it.packageName }
+        }
+        exempt = set
+        exemptComputedAt = now
+        return set
+    }
+
+    override fun onInterrupt() = Unit
+
+    override fun onDestroy() {
+        runCatching { unregisterReceiver(screenReceiver) }
+        scope.cancel()
+        super.onDestroy()
+    }
+
+    companion object {
+        private const val CHECK_INTERVAL_MS = 10_000L
+        private const val EXEMPT_TTL_MS = 5 * 60_000L
+
+        fun isEnabled(context: Context): Boolean {
+            val enabled = Settings.Secure.getString(
+                context.contentResolver, Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES
+            ) ?: return false
+            val me = ComponentName(context, AppGuardService::class.java)
+            return enabled.split(':').any {
+                it.equals(me.flattenToString(), true) || it.equals(me.flattenToShortString(), true)
+            }
+        }
+    }
+}

app/src/main/java/com/jttools/datacontrol/guard/BlockedActivity.kt

@@ -0,0 +1,76 @@
+package com.jttools.datacontrol.guard
+
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Lock
+import androidx.compose.material3.Button
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import com.jttools.datacontrol.ui.theme.DataControlTheme
+
+/** Écran affiché par-dessus une application bloquée : explique pourquoi et renvoie à l'accueil. */
+class BlockedActivity : ComponentActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        val label = intent.getStringExtra(EXTRA_LABEL).orEmpty()
+        val message = intent.getStringExtra(EXTRA_MESSAGE).orEmpty()
+        setContent {
+            DataControlTheme {
+                Surface(Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.errorContainer) {
+                    Column(
+                        Modifier.fillMaxSize().padding(32.dp),
+                        horizontalAlignment = Alignment.CenterHorizontally,
+                        verticalArrangement = Arrangement.Center
+                    ) {
+                        Icon(Icons.Filled.Lock, contentDescription = null, modifier = Modifier.size(72.dp))
+                        Spacer(Modifier.height(20.dp))
+                        Text(label, style = MaterialTheme.typography.headlineSmall, textAlign = TextAlign.Center)
+                        Spacer(Modifier.height(10.dp))
+                        Text(message, style = MaterialTheme.typography.bodyLarge, textAlign = TextAlign.Center)
+                        Spacer(Modifier.height(28.dp))
+                        Button(onClick = { goHome() }) { Text("Retour à l'accueil") }
+                    }
+                }
+            }
+        }
+    }
+
+    @Deprecated("Deprecated in Java")
+    override fun onBackPressed() = goHome()
+
+    private fun goHome() {
+        startActivity(Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
+        finish()
+    }
+
+    companion object {
+        private const val EXTRA_LABEL = "label"
+        private const val EXTRA_MESSAGE = "message"
+
+        fun intent(context: Context, label: String, message: String): Intent =
+            Intent(context, BlockedActivity::class.java)
+                .putExtra(EXTRA_LABEL, label)
+                .putExtra(EXTRA_MESSAGE, message)
+                .addFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_SINGLE_TOP)
+    }
+}

app/src/main/java/com/jttools/datacontrol/guard/GuardEngine.kt

@@ -0,0 +1,172 @@
+package com.jttools.datacontrol.guard
+
+import android.os.SystemClock
+import com.jttools.datacontrol.data.SettingsRepository
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.isActive
+import kotlinx.coroutines.launch
+import org.json.JSONObject
+import java.time.LocalDate
+import java.time.LocalDateTime
+import javax.inject.Inject
+import javax.inject.Singleton
+
+data class Block(val message: String)
+
+data class UsageSnapshot(val date: String, val totalMs: Long, val appMs: Map<String, Long>)
+
+/**
+ * Cœur de la limitation d'usage : cumule le temps d'écran (total et par application) à partir des
+ * changements d'application au premier plan, et décide si une application doit être bloquée
+ * (interdite, hors plage horaire, temps quotidien ou temps d'application épuisé).
+ *
+ * L'appelant ([AppGuardService]) ne signale JAMAIS les applications exemptées (lanceur, téléphone,
+ * clavier, DataControl) : elles ne comptent pas et ne sont jamais bloquées.
+ */
+@Singleton
+class GuardEngine @Inject constructor(private val settings: SettingsRepository) {
+
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
+    private val lock = Any()
+
+    @Volatile var rules: Rules = Rules.NONE
+        private set
+
+    private var started = false
+    private var day = LocalDate.now().toString()
+    private var totalMs = 0L
+    private val appMs = HashMap<String, Long>()
+    private var currentPkg: String? = null
+    private var lastMark = SystemClock.elapsedRealtime()
+    private var screenOn = true
+    private var dirty = false
+
+    fun start() {
+        synchronized(lock) { if (started) return; started = true }
+        scope.launch {
+            settings.loadUsage()?.let { (savedDay, json) -> restore(savedDay, json) }
+            settings.settingsFlow.map { it.rulesJson }.distinctUntilChanged().collect { rules = Rules.parse(it) }
+        }
+        scope.launch {
+            while (isActive) {
+                delay(PERSIST_INTERVAL_MS)
+                tick()
+                persist()
+            }
+        }
+    }
+
+    private fun restore(savedDay: String, json: String) = synchronized(lock) {
+        if (savedDay != LocalDate.now().toString()) return@synchronized
+        runCatching {
+            val o = JSONObject(json)
+            day = savedDay
+            totalMs = o.optLong("total")
+            appMs.clear()
+            o.optJSONObject("apps")?.let { a -> a.keys().forEach { k -> appMs[k] = a.optLong(k) } }
+        }
+    }
+
+    private suspend fun persist() {
+        val snap = synchronized(lock) { if (!dirty) return; dirty = false; usageLocked() }
+        val json = JSONObject().put("total", snap.totalMs).put("apps", JSONObject(snap.appMs as Map<*, *>)).toString()
+        settings.saveUsage(snap.date, json)
+    }
+
+    fun usage(): UsageSnapshot = synchronized(lock) { flush(); usageLocked() }
+
+    private fun usageLocked() = UsageSnapshot(day, totalMs, HashMap(appMs))
+
+    /** [pkg] = application désormais au premier plan, ou null si exemptée / aucune. */
+    fun onForeground(pkg: String?) = synchronized(lock) { flush(); currentPkg = pkg }
+
+    fun onScreen(on: Boolean) = synchronized(lock) { flush(); screenOn = on }
+
+    fun tick() = synchronized(lock) { flush() }
+
+    private fun flush() {
+        val now = SystemClock.elapsedRealtime()
+        val today = LocalDate.now().toString()
+        if (today != day) {
+            day = today; totalMs = 0; appMs.clear(); dirty = true
+        }
+        val pkg = currentPkg
+        if (pkg != null && screenOn) {
+            // Plafonné : si le service a été gelé longtemps, on ne comptabilise pas tout l'intervalle.
+            val delta = (now - lastMark).coerceIn(0, MAX_DELTA_MS)
+            if (delta > 0) {
+                totalMs += delta
+                appMs[pkg] = (appMs[pkg] ?: 0L) + delta
+                dirty = true
+            }
+        }
+        lastMark = now
+    }
+
+    /** Vrai si l'appareil est hors de toutes les plages horaires autorisées. */
+    fun scheduleLocked(): Boolean = synchronized(lock) {
+        val r = rules
+        r.scheduleEnabled && !inWindow(r, LocalDateTime.now())
+    }
+
+    fun cutsMobileNow(): Boolean = synchronized(lock) {
+        val r = rules
+        r.scheduleEnabled && r.scheduleCutsMobile && !inWindow(r, LocalDateTime.now())
+    }
+
+    fun check(pkg: String): Block? = synchronized(lock) {
+        flush()
+        val r = rules
+        if (r.isEmpty) return null
+        val now = LocalDateTime.now()
+        if (pkg in r.blocked) return Block("Cette application est bloquée par vos parents.")
+        if (r.scheduleEnabled && !inWindow(r, now)) {
+            return Block("L'appareil est verrouillé en dehors des plages horaires. ${nextOpening(r, now)}")
+        }
+        val bonusToday = r.bonusDate == day
+        if (r.dailyLimitMin > 0) {
+            val allowedMs = (r.dailyLimitMin + if (bonusToday) r.bonusGlobalMin else 0) * MIN_MS
+            if (totalMs >= allowedMs) return Block("Le temps d'écran de la journée est écoulé.")
+        }
+        r.appLimits.firstOrNull { it.pkg == pkg }?.let { lim ->
+            val bonus = if (bonusToday) r.bonusApps.firstOrNull { it.pkg == pkg }?.minutes ?: 0 else 0
+            if ((appMs[pkg] ?: 0L) >= (lim.minutes + bonus) * MIN_MS) {
+                return Block("Le temps alloué à cette application est écoulé.")
+            }
+        }
+        null
+    }
+
+    private fun inWindow(r: Rules, now: LocalDateTime): Boolean {
+        val dow = now.dayOfWeek.value
+        val prev = if (dow == 1) 7 else dow - 1
+        val minute = now.hour * 60 + now.minute
+        return r.windows.any { w ->
+            if (w.startMin <= w.endMin) dow in w.days && minute >= w.startMin && minute < w.endMin
+            else (dow in w.days && minute >= w.startMin) || (prev in w.days && minute < w.endMin)
+        }
+    }
+
+    private fun nextOpening(r: Rules, now: LocalDateTime): String {
+        val minute = now.hour * 60 + now.minute
+        for (offset in 0..7) {
+            val dow = ((now.dayOfWeek.value - 1 + offset) % 7) + 1
+            val start = r.windows.filter { dow in it.days && (offset > 0 || it.startMin > minute) }
+                .minOfOrNull { it.startMin } ?: continue
+            val label = "%02d:%02d".format(start / 60, start % 60)
+            return if (offset == 0) "Reprise à $label." else "Reprise à $label (dans $offset j)."
+        }
+        return ""
+    }
+
+    private companion object {
+        const val MIN_MS = 60_000L
+        const val MAX_DELTA_MS = 120_000L
+        const val PERSIST_INTERVAL_MS = 30_000L
+    }
+}

app/src/main/java/com/jttools/datacontrol/guard/Rules.kt

@@ -0,0 +1,67 @@
+package com.jttools.datacontrol.guard
+
+import org.json.JSONArray
+import org.json.JSONObject
+
+/** Plage pendant laquelle l'appareil est utilisable. Minutes depuis minuit ; jours ISO (1 = lundi … 7 = dimanche). */
+data class TimeWindow(val days: Set<Int>, val startMin: Int, val endMin: Int)
+
+data class AppLimit(val pkg: String, val minutes: Int)
+
+/**
+ * Règles d'usage envoyées par FamilyControl (champ `rules` de la config distante).
+ * Les temps s'entendent par jour ; le bonus n'est valable que le jour [bonusDate].
+ */
+data class Rules(
+    val scheduleEnabled: Boolean = false,
+    val scheduleCutsMobile: Boolean = true,
+    val windows: List<TimeWindow> = emptyList(),
+    val dailyLimitMin: Int = 0,
+    val appLimits: List<AppLimit> = emptyList(),
+    val blocked: Set<String> = emptySet(),
+    val bonusDate: String? = null,
+    val bonusGlobalMin: Int = 0,
+    val bonusApps: List<AppLimit> = emptyList()
+) {
+    val isEmpty: Boolean
+        get() = !scheduleEnabled && dailyLimitMin <= 0 && appLimits.isEmpty() && blocked.isEmpty()
+
+    companion object {
+        val NONE = Rules()
+
+        fun parse(json: String?): Rules {
+            if (json.isNullOrBlank()) return NONE
+            return runCatching {
+                val o = JSONObject(json)
+                val sch = o.optJSONObject("schedule")
+                val bonus = o.optJSONObject("bonus")
+                Rules(
+                    scheduleEnabled = sch?.optBoolean("enabled", false) ?: false,
+                    scheduleCutsMobile = sch?.optBoolean("cutsMobile", true) ?: true,
+                    windows = sch?.optJSONArray("windows").objects().map { w ->
+                        TimeWindow(
+                            days = w.optJSONArray("days").ints().toSet(),
+                            startMin = w.optInt("start", 0),
+                            endMin = w.optInt("end", 0)
+                        )
+                    },
+                    dailyLimitMin = o.optInt("dailyLimitMin", 0),
+                    appLimits = o.optJSONArray("appLimits").objects().map { AppLimit(it.optString("pkg"), it.optInt("min")) },
+                    blocked = o.optJSONArray("blocked").strings().toSet(),
+                    bonusDate = bonus?.optString("date")?.takeIf { it.isNotEmpty() },
+                    bonusGlobalMin = bonus?.optInt("globalMin", 0) ?: 0,
+                    bonusApps = bonus?.optJSONArray("apps").objects().map { AppLimit(it.optString("pkg"), it.optInt("min")) }
+                )
+            }.getOrDefault(NONE)
+        }
+
+        private fun JSONArray?.objects(): List<JSONObject> =
+            if (this == null) emptyList() else (0 until length()).mapNotNull { optJSONObject(it) }
+
+        private fun JSONArray?.ints(): List<Int> =
+            if (this == null) emptyList() else (0 until length()).map { optInt(it) }
+
+        private fun JSONArray?.strings(): List<String> =
+            if (this == null) emptyList() else (0 until length()).map { optString(it) }
+    }
+}

app/src/main/java/com/jttools/datacontrol/log/AppLog.kt

@@ -0,0 +1,67 @@
+package com.jttools.datacontrol.log
+
+import android.content.Context
+import android.util.Log
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import java.io.File
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+import java.util.concurrent.Executors
+
+/**
+ * Journal de diagnostic : garde les [MAX_LINES] dernières lignes en mémoire et dans un fichier
+ * (survit au redémarrage de l'app), consultable dans l'onglet « Journal ».
+ */
+object AppLog {
+    private const val MAX_LINES = 400
+    private const val FILE_NAME = "journal.txt"
+
+    private val io = Executors.newSingleThreadExecutor()
+    private val fmt = SimpleDateFormat("MM-dd HH:mm:ss", Locale.FRANCE)
+    private val lines = ArrayDeque<String>()
+    private val _entries = MutableStateFlow<List<String>>(emptyList())
+    val entries: StateFlow<List<String>> = _entries.asStateFlow()
+
+    @Volatile private var file: File? = null
+
+    fun init(context: Context) {
+        if (file != null) return
+        val f = File(context.filesDir, FILE_NAME)
+        file = f
+        synchronized(lines) {
+            runCatching { if (f.exists()) lines.addAll(f.readLines().takeLast(MAX_LINES)) }
+            _entries.value = lines.toList()
+        }
+        i("App", "Journal ouvert")
+    }
+
+    fun i(tag: String, message: String) = add("I", tag, message)
+    fun w(tag: String, message: String) = add("W", tag, message)
+    fun e(tag: String, message: String, t: Throwable? = null) =
+        add("E", tag, if (t == null) message else "$message — ${t.javaClass.simpleName}: ${t.message}")
+
+    private fun add(level: String, tag: String, message: String) {
+        Log.println(when (level) { "E" -> Log.ERROR; "W" -> Log.WARN; else -> Log.INFO }, "DataControl/$tag", message)
+        val line = "${fmt.format(Date())} $level $tag: $message"
+        synchronized(lines) {
+            lines.addLast(line)
+            while (lines.size > MAX_LINES) lines.removeFirst()
+            _entries.value = lines.toList()
+            val snapshot = lines.toList()
+            io.execute { runCatching { file?.writeText(snapshot.joinToString("\n")) } }
+        }
+    }
+
+    fun clear() {
+        synchronized(lines) {
+            lines.clear()
+            _entries.value = emptyList()
+            io.execute { runCatching { file?.writeText("") } }
+        }
+    }
+
+    fun asText(): String = synchronized(lines) { lines.joinToString("\n") }
+}

app/src/main/java/com/jttools/datacontrol/remote/DeviceReporter.kt

@@ -16,6 +16,8 @@ import androidx.core.content.ContextCompat
 import com.jttools.datacontrol.BuildConfig
 import com.jttools.datacontrol.admin.AdminController
 import com.jttools.datacontrol.data.SettingsRepository
+import com.jttools.datacontrol.guard.AppGuardService
+import com.jttools.datacontrol.guard.GuardEngine
 import com.jttools.datacontrol.service.FirewallVpnService
 import com.jttools.datacontrol.service.MonitorStateHolder
 import dagger.hilt.android.qualifiers.ApplicationContext
@@ -37,7 +39,8 @@ class DeviceReporter @Inject constructor(
     @ApplicationContext private val context: Context,
     private val remote: RemoteSync,
     private val settingsRepository: SettingsRepository,
-    private val stateHolder: MonitorStateHolder
+    private val stateHolder: MonitorStateHolder,
+    private val guardEngine: GuardEngine
 ) {
     private var started = false
     private var lastBatterySent = -1 to false
@@ -46,6 +49,8 @@ class DeviceReporter @Inject constructor(
     private var lastStateSignature = ""
     private var lastStateSentAt = 0L
     private var locationRegistered = false
+    private var lastGuardEnabled: Boolean? = null
+    private var lastUsageSentTotal = -1L
 
     fun start(scope: CoroutineScope) {
         if (started || !remote.available) return
@@ -69,6 +74,7 @@ class DeviceReporter @Inject constructor(
                     registerLocationUpdates(scope)
                     pushState()
                     pushTraffic()
+                    pushUsage()
                 }
                 delay(REPORT_INTERVAL_MS)
             }
@@ -94,6 +100,11 @@ class DeviceReporter @Inject constructor(
     private suspend fun pushState() {
         val s = settingsRepository.settingsFlow.first()
         val snap = stateHolder.snapshot.value
+        val guardEnabled = AppGuardService.isEnabled(context)
+        if (lastGuardEnabled == true && !guardEnabled) {
+            remote.pushEvent("guard_disabled", "Service d'accessibilité désactivé : les limites d'applications ne sont plus appliquées")
+        }
+        lastGuardEnabled = guardEnabled
         val state = mapOf(
             "controlEnabled" to s.controlEnabled,
             "transport" to snap.transport.name,
@@ -101,6 +112,8 @@ class DeviceReporter @Inject constructor(
             "vpnPrepared" to FirewallVpnService.isPrepared(context),
             "tunnelActive" to FirewallVpnService.tunnelActive,
             "adminActive" to AdminController.isActive(context),
+            "guardEnabled" to guardEnabled,
+            "rulesActive" to !guardEngine.rules.isEmpty,
             "consumedMo" to snap.consumedMo,
             "planLimitMo" to s.planLimitMo,
             "cutoffIntervalMinutes" to s.cutoffIntervalMinutes,
@@ -127,6 +140,14 @@ class DeviceReporter @Inject constructor(
         remote.pushTraffic(day)
     }
 
+    private suspend fun pushUsage() {
+        val u = guardEngine.usage()
+        // Ne renvoie que si le temps d'écran a évolué (ou changement de jour).
+        if (u.totalMs == lastUsageSentTotal) return
+        lastUsageSentTotal = u.totalMs
+        remote.pushUsage(u.date, u.totalMs, u.appMs)
+    }
+
     @SuppressLint("MissingPermission")
     private fun registerLocationUpdates(scope: CoroutineScope) {
         if (locationRegistered) return

app/src/main/java/com/jttools/datacontrol/remote/RemoteSync.kt

@@ -127,7 +127,8 @@ class RemoteSync @Inject constructor(
             whitelistedPackagesWifi = strings("whitelistedPackagesWifi"),
             wifiFilterEnabled = m["wifiFilterEnabled"] as? Boolean,
             planLimitMo = (m["planLimitMo"] as? Number)?.toLong(),
-            cutoffIntervalMinutes = (m["cutoffIntervalMinutes"] as? Number)?.toInt()
+            cutoffIntervalMinutes = (m["cutoffIntervalMinutes"] as? Number)?.toInt(),
+            rulesJson = (m["rules"] as? Map<*, *>)?.let { org.json.JSONObject(it).toString() }
         )
     }
 
@@ -157,6 +158,15 @@ class RemoteSync @Inject constructor(
         )
     }
 
+    suspend fun pushUsage(date: String, totalMs: Long, appMs: Map<String, Long>) {
+        val s = settingsRepository.settingsFlow.first()
+        val ref = deviceDoc(s) ?: return
+        write(
+            ref.collection("usage").document(date),
+            mapOf("date" to date, "totalMs" to totalMs, "apps" to appMs, "at" to System.currentTimeMillis())
+        )
+    }
+
     suspend fun pushEvent(type: String, detail: String) {
         val s = settingsRepository.settingsFlow.first()
         val ref = deviceDoc(s) ?: return

app/src/main/java/com/jttools/datacontrol/service/ConnectivityObserver.kt

@@ -5,6 +5,7 @@ import android.net.ConnectivityManager
 import android.net.Network
 import android.net.NetworkCapabilities
 import android.net.NetworkRequest
+import com.jttools.datacontrol.log.AppLog
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.Flow
@@ -42,7 +43,7 @@ class ConnectivityObserver @Inject constructor(
         fun publish() {
             val values = synchronized(physical) { physical.values.toList() }
             // Android privilégie le Wi-Fi quand les deux sont connectés.
-            trySend(
+            val result = (
                 when {
                     NetworkTransport.WIFI in values -> NetworkTransport.WIFI
                     NetworkTransport.CELLULAR in values -> NetworkTransport.CELLULAR
@@ -50,12 +51,14 @@ class ConnectivityObserver @Inject constructor(
                     else -> NetworkTransport.NONE
                 }
             )
+            trySend(result)
         }
 
         val callback = object : ConnectivityManager.NetworkCallback() {
             override fun onCapabilitiesChanged(network: Network, caps: NetworkCapabilities) {
-                if (caps.hasTransport(NetworkCapabilities.TRANSPORT_VPN)) return
+                if (caps.hasTransport(NetworkCapabilities.TRANSPORT_VPN)) return  // notre propre tunnel : ignoré
                 synchronized(physical) { physical[network] = transportOf(caps) }
+                AppLog.i("Réseau", "réseau physique ${transportOf(caps)} (caps mis à jour)")
                 publish()
             }
 

app/src/main/java/com/jttools/datacontrol/service/DataMonitorService.kt

@@ -20,6 +20,8 @@ import com.jttools.datacontrol.data.AppSettings
 import com.jttools.datacontrol.data.DataState
 import com.jttools.datacontrol.data.SettingsRepository
 import com.jttools.datacontrol.data.UsageRepository
+import com.jttools.datacontrol.guard.GuardEngine
+import com.jttools.datacontrol.log.AppLog
 import com.jttools.datacontrol.remote.DeviceReporter
 import com.jttools.datacontrol.remote.RemoteSync
 import dagger.hilt.android.AndroidEntryPoint
@@ -49,6 +51,7 @@ class DataMonitorService : LifecycleService() {
     @Inject lateinit var stateHolder: MonitorStateHolder
     @Inject lateinit var deviceReporter: DeviceReporter
     @Inject lateinit var remoteSync: RemoteSync
+    @Inject lateinit var guardEngine: GuardEngine
 
     private var latestSettings: AppSettings = AppSettings()
     private var latestTransport: NetworkTransport = NetworkTransport.NONE
@@ -63,6 +66,7 @@ class DataMonitorService : LifecycleService() {
     private var pulseStartMillis: Long = 0L
     private var settingsLoaded = false
     private var lastControlEnabled: Boolean? = null
+    private var lastDiagnostic = ""
 
     private val vpnRevokedReceiver = object : BroadcastReceiver() {
         override fun onReceive(context: Context?, intent: Intent?) {
@@ -90,6 +94,7 @@ class DataMonitorService : LifecycleService() {
             ContextCompat.RECEIVER_NOT_EXPORTED
         )
         startForeground(NOTIF_ID, buildNotification(stateHolder.snapshot.value))
+        AppLog.i("Service", "DataMonitorService démarré")
 
         lifecycleScope.launch {
             settingsRepository.settingsFlow.collect {
@@ -116,6 +121,7 @@ class DataMonitorService : LifecycleService() {
                 tick()
             }
         }
+        guardEngine.start()
         deviceReporter.start(lifecycleScope)
         lifecycleScope.launch {
             connectivityObserver.observe().collect {
@@ -182,37 +188,47 @@ class DataMonitorService : LifecycleService() {
                 dataState = DataState.WIFI
             }
             latestTransport == NetworkTransport.CELLULAR && !vpnRevoked && FirewallVpnService.isPrepared(this) -> {
-                // La coupure cyclique tourne en continu sur données mobiles, indépendamment du
-                // dépassement du forfait : elle ne doit pas attendre le hors-forfait pour se déclencher.
-                val now = System.currentTimeMillis()
-                val intervalMs = settings.cutoffIntervalMinutes * 60_000L
-                if (cutoffCycleAnchorMillis == null) {
-                    cutoffCycleAnchorMillis = now
-                    persistCutoffState()
-                }
-                val anchor = cutoffCycleAnchorMillis!!
-
-                if (inPulse) {
-                    if (now - pulseStartMillis >= PULSE_DURATION_MS) {
-                        inPulse = false
+                if (guardEngine.cutsMobileNow()) {
+                    // Hors plage horaire autorisée : couper les données mobiles (règle du parent).
+                    applyVpnMode(VpnMode.BLOCK_ALL, emptySet())
+                    resetCutoffCycle()
+                    firewallFault = !FirewallVpnService.tunnelActive &&
+                        System.currentTimeMillis() - lastApplyMillis > TUNNEL_RETRY_DELAY_MS
+                    dataState = DataState.CUT
+                } else {
+                    // La coupure cyclique tourne en continu sur données mobiles, indépendamment du
+                    // dépassement du forfait : elle ne doit pas attendre le hors-forfait pour se déclencher.
+                    val now = System.currentTimeMillis()
+                    val intervalMs = settings.cutoffIntervalMinutes * 60_000L
+                    if (cutoffCycleAnchorMillis == null) {
                         cutoffCycleAnchorMillis = now
                         persistCutoffState()
-                        applyVpnMode(VpnMode.FILTER, settings.whitelistedPackages)
-                    } else {
-                        applyVpnMode(VpnMode.BLOCK_ALL, emptySet())
                     }
-                } else if (now - anchor >= intervalMs) {
-                    inPulse = true
-                    pulseStartMillis = now
-                    persistCutoffState()
-                    applyVpnMode(VpnMode.BLOCK_ALL, emptySet())
-                } else {
-                    applyVpnMode(VpnMode.FILTER, settings.whitelistedPackages)
+                    val anchor = cutoffCycleAnchorMillis!!
+
+                    if (inPulse) {
+                        if (now - pulseStartMillis >= PULSE_DURATION_MS) {
+                            inPulse = false
+                            cutoffCycleAnchorMillis = now
+                            persistCutoffState()
+                            applyVpnMode(VpnMode.FILTER, settings.whitelistedPackages)
+                        } else {
+                            applyVpnMode(VpnMode.BLOCK_ALL, emptySet())
+                        }
+                    } else if (now - anchor >= intervalMs) {
+                        inPulse = true
+                        pulseStartMillis = now
+                        persistCutoffState()
+                        applyVpnMode(VpnMode.BLOCK_ALL, emptySet())
+                    } else {
+                        applyVpnMode(VpnMode.FILTER, settings.whitelistedPackages)
+                    }
+                    nextCutoffAt = if (inPulse) pulseStartMillis + PULSE_DURATION_MS else anchor + intervalMs
+                    firewallFault = !FirewallVpnService.tunnelActive &&
+                        System.currentTimeMillis() - lastApplyMillis > TUNNEL_RETRY_DELAY_MS
+                    dataState = if (inPulse) DataState.CUT else if (percent >= WARNING_THRESHOLD) DataState.WARNING else DataState.OK
+            
                 }
-                nextCutoffAt = if (inPulse) pulseStartMillis + PULSE_DURATION_MS else anchor + intervalMs
-                firewallFault = !FirewallVpnService.tunnelActive &&
-                    System.currentTimeMillis() - lastApplyMillis > TUNNEL_RETRY_DELAY_MS
-                dataState = if (inPulse) DataState.CUT else if (percent >= WARNING_THRESHOLD) DataState.WARNING else DataState.OK
             }
             else -> {
                 // Pas de réseau, transport inconnu, ou VPN non préparé/révoqué : rien à filtrer.
@@ -224,6 +240,8 @@ class DataMonitorService : LifecycleService() {
             }
         }
 
+        logDiagnostic(settings)
+
         stateHolder.update {
             it.copy(
                 consumedMo = consumedMo,
@@ -241,6 +259,24 @@ class DataMonitorService : LifecycleService() {
         updateNotification(stateHolder.snapshot.value)
     }
 
+    /** Écrit dans le journal POURQUOI le pare-feu est (ou n'est pas) actif, à chaque changement de situation. */
+    private fun logDiagnostic(settings: AppSettings) {
+        val prepared = FirewallVpnService.isPrepared(this)
+        val expected = when {
+            !settings.controlEnabled -> "contrôle désactivé"
+            latestTransport == NetworkTransport.WIFI ->
+                if (settings.wifiFilterEnabled && prepared) "Wi-Fi filtré" else "Wi-Fi : pas de filtrage (normal, le VPN ne se monte que sur données mobiles)"
+            latestTransport == NetworkTransport.CELLULAR ->
+                if (!prepared) "données mobiles mais autorisation VPN absente" else if (vpnRevoked) "données mobiles mais VPN révoqué" else "données mobiles : pare-feu attendu"
+            else -> "aucun réseau actif (${latestTransport})"
+        }
+        val diag = "réseau=$latestTransport contrôle=${settings.controlEnabled} vpnAutorisé=$prepared révoqué=$vpnRevoked mode=${lastAppliedMode ?: "—"} → $expected"
+        if (diag != lastDiagnostic) {
+            lastDiagnostic = diag
+            AppLog.i("Pare-feu", diag)
+        }
+    }
+
     private fun resetCutoffCycle() {
         if (cutoffCycleAnchorMillis == null && !inPulse) return
         cutoffCycleAnchorMillis = null
@@ -272,6 +308,7 @@ class DataMonitorService : LifecycleService() {
         lastAppliedMode = mode
         lastAppliedWhitelist = whitelist
         lastApplyMillis = System.currentTimeMillis()
+        AppLog.i("Pare-feu", "→ mode $mode (${whitelist.size} app(s) autorisée(s))")
         when (mode) {
             VpnMode.STOPPED -> ContextCompat.startForegroundService(this, FirewallVpnService.stopIntent(this))
             VpnMode.FILTER -> ContextCompat.startForegroundService(

app/src/main/java/com/jttools/datacontrol/service/FirewallVpnService.kt

@@ -14,6 +14,7 @@ import android.util.Log
 import androidx.core.app.NotificationCompat
 import com.jttools.datacontrol.MainActivity
 import com.jttools.datacontrol.R
+import com.jttools.datacontrol.log.AppLog
 import java.io.FileInputStream
 
 /**
@@ -38,8 +39,10 @@ class FirewallVpnService : VpnService() {
         // dans les 5 secondes qui suivent, sous peine de crash (ForegroundServiceDidNotStartInTimeException
         // sur Android 12+), même si le service s'arrête immédiatement après.
         startForeground(NOTIF_ID, buildNotification())
+        AppLog.i(TAG, "onStartCommand action=${intent?.action?.substringAfterLast('.') ?: "null (relance système)"}")
         when (intent?.action) {
             ACTION_STOP -> {
+                AppLog.i(TAG, "Arrêt du tunnel demandé")
                 stopTunnel()
                 stopSelf()
                 return START_NOT_STICKY
@@ -54,6 +57,7 @@ class FirewallVpnService : VpnService() {
 
     private fun establishTunnel(allowedPackages: Set<String>) {
         stopTunnel(keepForeground = true)
+        AppLog.i(TAG, "Établissement du tunnel : ${allowedPackages.size} application(s) exclue(s) du filtrage")
 
         val builder = Builder()
             .setSession("DataControl")
@@ -70,10 +74,15 @@ class FirewallVpnService : VpnService() {
 
         tunInterface = runCatching { builder.establish() }.getOrElse {
             Log.e(TAG, "Échec établissement du tunnel VPN", it)
+            AppLog.e(TAG, "establish() a échoué", it)
             null
         }
 
-        val fd = tunInterface ?: return
+        val fd = tunInterface ?: run {
+            AppLog.e(TAG, "Tunnel NON monté : establish() a renvoyé null (autorisation VPN retirée ou autre VPN prioritaire)")
+            return
+        }
+        AppLog.i(TAG, "Tunnel VPN monté (l'icône clé doit apparaître)")
         running = true
         tunnelActive = true
         readerThread = Thread({ blackhole(fd) }, "datacontrol-vpn-blackhole").apply {
@@ -117,6 +126,7 @@ class FirewallVpnService : VpnService() {
     }
 
     override fun onRevoke() {
+        AppLog.w(TAG, "onRevoke : le système ou un autre VPN a repris la main")
         stopTunnel()
         sendBroadcast(Intent(ACTION_VPN_REVOKED).setPackage(packageName))
         super.onRevoke()

app/src/main/java/com/jttools/datacontrol/ui/SystemActions.kt

@@ -73,6 +73,12 @@ class SystemActions(private val activity: ComponentActivity) {
         backgroundLocationLauncher.launch(android.Manifest.permission.ACCESS_BACKGROUND_LOCATION)
     }
 
+    fun isGuardEnabled(): Boolean = com.jttools.datacontrol.guard.AppGuardService.isEnabled(activity)
+
+    fun openAccessibilitySettings() {
+        activity.startActivity(Intent(Settings.ACTION_ACCESSIBILITY_SETTINGS))
+    }
+
     fun isAdminActive(): Boolean = com.jttools.datacontrol.admin.AdminController.isActive(activity)
 
     fun requestAdmin(onResult: (Boolean) -> Unit) {

app/src/main/java/com/jttools/datacontrol/ui/dashboard/DashboardScreen.kt

@@ -163,6 +163,7 @@ fun DashboardScreen(systemActions: SystemActions) {
                             if (checked) {
                                 systemActions.requestNotificationPermission { _ ->
                                     systemActions.requestVpnPermission { granted ->
+                                        com.jttools.datacontrol.log.AppLog.i("Tableau de bord", "Activation du contrôle : autorisation VPN ${if (granted) "accordée" else "REFUSÉE"}")
                                         if (granted) {
                                             viewModel.setControlEnabled(true)
                                             DataMonitorService.start(context)

app/src/main/java/com/jttools/datacontrol/ui/family/FamilySection.kt

@@ -16,7 +16,6 @@ import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -29,6 +28,8 @@ import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.text.input.PasswordVisualTransformation
 import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.compose.LifecycleEventEffect
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.jttools.datacontrol.R
 import com.jttools.datacontrol.ui.SystemActions
@@ -46,6 +47,7 @@ fun FamilySection(systemActions: SystemActions) {
     var adminActive by remember { mutableStateOf(systemActions.isAdminActive()) }
     var locationGranted by remember { mutableStateOf(systemActions.hasLocationPermission()) }
     var backgroundGranted by remember { mutableStateOf(systemActions.hasBackgroundLocationPermission()) }
+    var guardEnabled by remember { mutableStateOf(systemActions.isGuardEnabled()) }
     var code by remember { mutableStateOf("") }
     var deviceName by remember { mutableStateOf(android.os.Build.MODEL) }
 
@@ -54,10 +56,12 @@ fun FamilySection(systemActions: SystemActions) {
     var pwd by remember { mutableStateOf("") }
     var pwdError by remember { mutableStateOf(false) }
 
-    LaunchedEffect(Unit) {
+    // Au retour des écrans système (accessibilité, permissions, admin), on relit l'état réel.
+    LifecycleEventEffect(Lifecycle.Event.ON_RESUME) {
         adminActive = systemActions.isAdminActive()
         locationGranted = systemActions.hasLocationPermission()
         backgroundGranted = systemActions.hasBackgroundLocationPermission()
+        guardEnabled = systemActions.isGuardEnabled()
     }
 
     fun runProtected(action: String, block: () -> Unit) {
@@ -140,6 +144,26 @@ fun FamilySection(systemActions: SystemActions) {
 
             HorizontalDivider()
 
+            // --- Limitation des applications ---
+            Text(stringResource(R.string.family_guard_title), fontWeight = FontWeight.Medium)
+            Text(
+                stringResource(R.string.family_guard_desc),
+                style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+            if (guardEnabled) {
+                Text(stringResource(R.string.settings_perm_granted), color = StateOk)
+            } else {
+                Button(onClick = { systemActions.openAccessibilitySettings() }) {
+                    Text(stringResource(R.string.family_guard_enable))
+                }
+                Text(
+                    stringResource(R.string.family_guard_hint),
+                    style = MaterialTheme.typography.bodySmall, color = MaterialTheme.colorScheme.onSurfaceVariant
+                )
+            }
+
+            HorizontalDivider()
+
             // --- Position ---
             Text(stringResource(R.string.family_location_title), fontWeight = FontWeight.Medium)
             Text(

app/src/main/java/com/jttools/datacontrol/ui/journal/JournalScreen.kt

@@ -0,0 +1,83 @@
+package com.jttools.datacontrol.ui.journal
+
+import android.content.ClipData
+import android.content.ClipboardManager
+import android.content.Context
+import android.content.Intent
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.jttools.datacontrol.log.AppLog
+import com.jttools.datacontrol.service.FirewallVpnService
+import kotlinx.coroutines.delay
+
+@Composable
+fun JournalScreen() {
+    val context = LocalContext.current
+    val entries by AppLog.entries.collectAsStateWithLifecycle()
+
+    // État en direct du pare-feu, rafraîchi chaque seconde : première chose à regarder si le VPN n'apparaît pas.
+    var live by remember { mutableStateOf(liveStatus(context)) }
+    LaunchedEffect(Unit) {
+        while (true) { live = liveStatus(context); delay(1000) }
+    }
+
+    Column(Modifier.fillMaxSize().padding(16.dp), verticalArrangement = Arrangement.spacedBy(10.dp)) {
+        Text("Journal", style = MaterialTheme.typography.headlineMedium)
+        Card(shape = RoundedCornerShape(16.dp)) {
+            Text(live, fontFamily = FontFamily.Monospace, fontSize = 12.sp, modifier = Modifier.padding(12.dp))
+        }
+        Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+            Button(onClick = {
+                val cm = context.getSystemService(ClipboardManager::class.java)
+                cm.setPrimaryClip(ClipData.newPlainText("Journal DataControl", live + "\n\n" + AppLog.asText()))
+            }) { Text("Copier") }
+            OutlinedButton(onClick = {
+                val send = Intent(Intent.ACTION_SEND).setType("text/plain")
+                    .putExtra(Intent.EXTRA_TEXT, live + "\n\n" + AppLog.asText())
+                context.startActivity(Intent.createChooser(send, "Partager le journal").addFlags(Intent.FLAG_ACTIVITY_NEW_TASK))
+            }) { Text("Partager") }
+            OutlinedButton(onClick = { AppLog.clear() }) { Text("Effacer") }
+        }
+        LazyColumn(Modifier.fillMaxWidth().weight(1f), verticalArrangement = Arrangement.spacedBy(2.dp)) {
+            items(entries.asReversed()) { line ->
+                val color = when {
+                    " E " in line.take(16) -> Color(0xFFC62828)
+                    " W " in line.take(16) -> Color(0xFFEF6C00)
+                    else -> MaterialTheme.colorScheme.onSurface
+                }
+                Text(line, color = color, fontFamily = FontFamily.Monospace, fontSize = 11.sp)
+            }
+        }
+    }
+}
+
+private fun liveStatus(context: Context): String = buildString {
+    appendLine("VPN autorisé (prepare) : ${FirewallVpnService.isPrepared(context)}")
+    appendLine("Tunnel VPN monté       : ${FirewallVpnService.tunnelActive}")
+    append("Attendu : le tunnel n'est monté QUE sur données mobiles, contrôle activé.")
+}

app/src/main/java/com/jttools/datacontrol/ui/navigation/DataControlNavHost.kt

@@ -2,6 +2,7 @@ package com.jttools.datacontrol.ui.navigation
 
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.List
+import androidx.compose.material.icons.filled.BugReport
 import androidx.compose.material.icons.filled.Dashboard
 import androidx.compose.material.icons.filled.Info
 import androidx.compose.material.icons.filled.Settings
@@ -25,6 +26,7 @@ import com.jttools.datacontrol.R
 import com.jttools.datacontrol.ui.SystemActions
 import com.jttools.datacontrol.ui.about.AboutScreen
 import com.jttools.datacontrol.ui.dashboard.DashboardScreen
+import com.jttools.datacontrol.ui.journal.JournalScreen
 import com.jttools.datacontrol.ui.settings.SettingsScreen
 import com.jttools.datacontrol.ui.whitelist.WhitelistScreen
 
@@ -32,10 +34,11 @@ private sealed class Destination(val route: String, val labelRes: Int, val icon:
     data object Dashboard : Destination("dashboard", R.string.nav_dashboard, Icons.Filled.Dashboard)
     data object Settings : Destination("settings", R.string.nav_settings, Icons.Filled.Settings)
     data object Whitelist : Destination("whitelist", R.string.nav_whitelist, Icons.AutoMirrored.Filled.List)
+    data object Journal : Destination("journal", R.string.nav_journal, Icons.Filled.BugReport)
     data object About : Destination("about", R.string.nav_about, Icons.Filled.Info)
 }
 
-private val destinations = listOf(Destination.Dashboard, Destination.Settings, Destination.Whitelist, Destination.About)
+private val destinations = listOf(Destination.Dashboard, Destination.Settings, Destination.Whitelist, Destination.Journal, Destination.About)
 
 @Composable
 fun DataControlNavHost(systemActions: SystemActions) {
@@ -72,6 +75,7 @@ fun DataControlNavHost(systemActions: SystemActions) {
             composable(Destination.Dashboard.route) { DashboardScreen(systemActions) }
             composable(Destination.Settings.route) { SettingsScreen(systemActions) }
             composable(Destination.Whitelist.route) { WhitelistScreen() }
+            composable(Destination.Journal.route) { JournalScreen() }
             composable(Destination.About.route) { AboutScreen() }
         }
     }