feat(android): app nativa Kotlin/Compose (login, rooms, chat)

App Android Material 3, tema oscuro con acento índigo/violeta que replica el
look & feel de la app web (web/src):

- Login: identidad + contraseña, candado de marca, estilo Card.
- Lista de rooms: avatar+handle, buscador rooms/usuarios/mensajes, items con
  candado (E2E) / hash (cleartext), hora, último mensaje y badge de no leídos.
- Chat estilo Element: avatar+nombre+hora+texto, composer redondeado con send.

Arquitectura por capas: UnibusRepository aísla la UI de la fuente de datos.
MockUnibusRepository (en memoria) alimenta la iteración de diseño;
BindingUnibusRepository implementa la misma interfaz sobre el binding gomobile
(unibus.aar) para conectar el bus real sin tocar las pantallas. AppViewModel
orquesta el estado; navegación por estado (login -> rooms -> chat), KISS.

Build: ./gradlew assembleDebug (AGP 8.5.2, Gradle 8.7, Kotlin 1.9.24,
Compose BOM 2024.06.00, compileSdk 34, minSdk 21). El .aar se regenera con
mobile/gen_aar.sh (no se versiona, 38MB).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -14,3 +14,7 @@ worker.id
 /chat
 *.exe
 registry.db
+
+# local workspace (no committear: replace absoluto al registry)
+go.work
+go.work.sum

android/.gitignore

@@ -1,12 +1,15 @@
-.gradle/
-build/
-local.properties
+# Android / Gradle build artifacts
 *.iml
-.idea/
-captures/
-.cxx/
+.gradle/
+/local.properties
+/.idea
+.DS_Store
+/build
+/app/build
+/captures
+.externalNativeBuild
+.cxx
 
-# The gomobile binding is a build artifact (~24 MB). Regenerate it from ../mobile
-# with `gomobile bind` (see README.md); it is not versioned.
-app/libs/*.aar
-app/libs/*.jar
+# binding gomobile regenerable (38MB): ver mobile/gen_aar.sh
+/app/libs/*.aar
+/app/libs/*-sources.jar

android/README.md

@@ -1,83 +0,0 @@
-# unibus · app Android
-
-Cliente móvil nativo de unibus. La app no habla con un gateway: embebe un **peer
-real** del bus a través del binding gomobile `mobile/unibus.go`, de modo que el
-cifrado extremo a extremo corre **en el dispositivo**. Cada teléfono es un peer
-de primera clase del bus, igual que cualquier peer Go.
-
-## Arquitectura
-
-```
-Kotlin/Compose UI  ──>  BusViewModel  ──>  com.unibus.core.mobile.Session (.aar)
-                                              │  (NATS data plane + E2E crypto, en Go)
-                                              ▼
-                                      membershipd (control plane HTTP :8470)
-                                      NATS (data plane :4250)
-```
-
-- `BusViewModel` traduce intents de UI en llamadas al binding. Las llamadas de red
-  (`newSession`, `createRoom`, `join`, `publish`) corren en `Dispatchers.IO`.
-- Los frames entrantes llegan por `FrameListener.onFrame` en una goroutine NATS
-  (hilo JNI); se publican en un `StateFlow` (thread-safe) que Compose recolecta en
-  el hilo principal.
-
-## Requisitos
-
-- Android SDK (compileSdk 34), NDK (para regenerar el `.aar`), JDK 17.
-- El binding `app/libs/unibus.aar` (no versionado: es un artefacto de ~24 MB).
-
-## 1. Generar el binding (.aar)
-
-Desde la raíz del repo de la app (`projects/message_bus/apps/unibus`):
-
-```bash
-export ANDROID_HOME=$HOME/android-sdk
-export ANDROID_NDK_HOME=$HOME/android-sdk/ndk/26.3.11579264
-mkdir -p android/app/libs
-gomobile bind -target=android -androidapi 21 -javapkg com.unibus.core \
-  -o android/app/libs/unibus.aar ./mobile
-```
-
-Esto produce `unibus.aar` con la clase estática `com.unibus.core.mobile.Mobile`
-(`generateIdentity`, `newSession`) y los tipos `Session` y `FrameListener`.
-
-## 2. Compilar el APK
-
-```bash
-cd android
-export JAVA_HOME=$HOME/android-sdk/jdk-17/jdk-17.0.19+10
-export ANDROID_HOME=$HOME/android-sdk
-./gradlew assembleDebug
-# APK: app/build/outputs/apk/debug/app-debug.apk
-```
-
-`local.properties` apunta a `sdk.dir`; ajústalo si tu SDK está en otra ruta.
-
-## 3. Arrancar el bus y probar en el emulador
-
-```bash
-# 1. En el PC: control plane + NATS embebido (HTTP :8470, NATS :4250)
-cd projects/message_bus/apps/unibus && go run ./cmd/membershipd
-
-# 2. Emulador Pixel_API34
-$ANDROID_HOME/emulator/emulator -avd Pixel_API34 &
-
-# 3. Instalar + lanzar
-adb install -r app/build/outputs/apk/debug/app-debug.apk
-adb shell am start -n com.unibus.app/.MainActivity
-```
-
-En la pantalla de conexión, desde el emulador el host del PC es `10.0.2.2`:
-
-- **Host (control plane):** `http://10.0.2.2:8470`
-- **NATS (data plane):** `nats://10.0.2.2:4250`
-
-Para un teléfono físico en la misma LAN, usa la IP LAN del PC en lugar de
-`10.0.2.2`.
-
-## Notas
-
-- La identidad del peer se guarda en `filesDir/peer.id` (claves privadas
-  Ed25519 + X25519). No se sincroniza ni se respalda.
-- Una room creada en modo "cifrar (E2E)" usa la política Matrix (cifrada,
-  persistida, firmada); en modo normal usa NATS cleartext.

android/app/build.gradle.kts

@@ -1,7 +1,7 @@
 plugins {
     id("com.android.application")
     id("org.jetbrains.kotlin.android")
-    id("org.jetbrains.kotlin.plugin.compose")
+    id("org.jetbrains.kotlin.plugin.serialization")
 }
 
 android {
@@ -14,10 +14,21 @@ android {
         targetSdk = 34
         versionCode = 1
         versionName = "0.1.0"
+        // The unibus.aar ships native libgojni.so for these ABIs. Limit the APK
+        // to the desktop/emulator + phone ABIs we actually target.
+        ndk {
+            abiFilters += listOf("arm64-v8a", "armeabi-v7a", "x86", "x86_64")
+        }
     }
 
-    buildFeatures {
-        compose = true
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro",
+            )
+        }
     }
 
     compileOptions {
@@ -27,17 +38,13 @@ android {
     kotlinOptions {
         jvmTarget = "17"
     }
-
-    buildTypes {
-        getByName("release") {
-            isMinifyEnabled = false
-            proguardFiles(
-                getDefaultProguardFile("proguard-android-optimize.txt"),
-                "proguard-rules.pro",
-            )
+    buildFeatures {
+        compose = true
     }
+    composeOptions {
+        // Compose compiler matching Kotlin 1.9.24.
+        kotlinCompilerExtensionVersion = "1.5.14"
     }
-
     packaging {
         resources {
             excludes += "/META-INF/{AL2.0,LGPL2.1}"
@@ -46,21 +53,23 @@ android {
 }
 
 dependencies {
-    // The unibus gomobile binding: a real bus peer that does NATS + E2E crypto
-    // on the device. All protocol logic lives here, shared with every other peer.
+    // gomobile binding over pkg/client (real end-to-end crypto on device).
     implementation(files("libs/unibus.aar"))
 
-    val composeBom = platform("androidx.compose:compose-bom:2024.09.03")
+    implementation("androidx.core:core-ktx:1.13.1")
+    implementation("androidx.activity:activity-compose:1.9.0")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.8.2")
+    implementation("androidx.lifecycle:lifecycle-viewmodel-compose:2.8.2")
+
+    val composeBom = platform("androidx.compose:compose-bom:2024.06.00")
     implementation(composeBom)
     implementation("androidx.compose.ui:ui")
     implementation("androidx.compose.ui:ui-graphics")
-    implementation("androidx.compose.ui:ui-tooling-preview")
     implementation("androidx.compose.material3:material3")
     implementation("androidx.compose.material:material-icons-extended")
-    implementation("androidx.activity:activity-compose:1.9.2")
-    implementation("androidx.lifecycle:lifecycle-viewmodel-compose:2.8.6")
-    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.8.6")
-    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.8.1")
-
+    implementation("androidx.compose.ui:ui-tooling-preview")
     debugImplementation("androidx.compose.ui:ui-tooling")
+
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.3")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.8.1")
 }

android/app/libs/README.md

@@ -0,0 +1,12 @@
+# libs/
+
+`unibus.aar` (binding gomobile sobre `pkg/client`, ~38 MB con `libgojni.so` para
+4 ABIs) vive aquí pero **no se versiona** — es un artefacto de build reproducible.
+
+Regenéralo con:
+
+```bash
+../../mobile/gen_aar.sh
+```
+
+(desde la raíz del repo: `./mobile/gen_aar.sh`). Requiere Go + gomobile + Android NDK.

android/app/proguard-rules.pro

@@ -1,4 +1,4 @@
-# gomobile generates JNI-bound classes under com.unibus.core.mobile and go.*.
-# They are reached from native code, so keep them intact even when minifying.
--keep class com.unibus.core.mobile.** { *; }
+# gomobile binding: keep the generated Go<->Java bridge classes intact so the
+# JNI layer can find them by name at runtime.
 -keep class go.** { *; }
+-keep class com.unibus.core.mobile.** { *; }

android/app/src/main/AndroidManifest.xml

@@ -1,25 +1,25 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
+    <!-- The bus is reached over the network (NATS data plane + control plane). -->
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 
     <application
         android:allowBackup="true"
-        android:label="@string/app_name"
-        android:supportsRtl="true"
-        android:usesCleartextTraffic="true"
-        android:theme="@style/Theme.Unibus">
+        android:label="unibus"
+        android:icon="@mipmap/ic_launcher"
+        android:theme="@style/Theme.Unibus"
+        android:supportsRtl="true">
+
         <activity
             android:name=".MainActivity"
             android:exported="true"
-            android:label="@string/app_name"
-            android:windowSoftInputMode="adjustResize">
+            android:theme="@style/Theme.Unibus">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
     </application>
-
 </manifest>

android/app/src/main/java/com/unibus/app/AppViewModel.kt

@@ -0,0 +1,88 @@
+package com.unibus.app
+
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.unibus.app.data.Message
+import com.unibus.app.data.MockUnibusRepository
+import com.unibus.app.data.Room
+import com.unibus.app.data.UnibusRepository
+import com.unibus.app.data.User
+import kotlinx.coroutines.launch
+
+/**
+ * Estado de la app. Orquesta el [UnibusRepository] (mock por defecto) y expone
+ * estado observable a Compose. Cambiar el repo por [com.unibus.app.data.BindingUnibusRepository]
+ * conecta la UI al bus real sin tocar las pantallas.
+ */
+class AppViewModel(
+    private val repo: UnibusRepository,
+) : ViewModel() {
+
+    // Constructor no-arg para que androidx `viewModel()` lo instancie por
+    // reflexión. Por defecto usa el repositorio mock (iteración de diseño).
+    constructor() : this(MockUnibusRepository())
+
+    var user by mutableStateOf<User?>(null)
+        private set
+    var rooms by mutableStateOf<List<Room>>(emptyList())
+        private set
+    var activeRoomId by mutableStateOf<String?>(null)
+        private set
+    var messages by mutableStateOf<List<Message>>(emptyList())
+        private set
+    var connecting by mutableStateOf(false)
+        private set
+    var error by mutableStateOf<String?>(null)
+        private set
+
+    val activeRoom: Room?
+        get() = rooms.firstOrNull { it.id == activeRoomId }
+
+    fun connect(handle: String, password: String) {
+        if (connecting) return
+        connecting = true
+        error = null
+        viewModelScope.launch {
+            repo.connect(handle, password)
+                .onSuccess {
+                    user = it
+                    rooms = repo.listRooms()
+                }
+                .onFailure { error = it.message ?: "No se pudo conectar" }
+            connecting = false
+        }
+    }
+
+    fun openRoom(id: String) {
+        activeRoomId = id
+        messages = repo.messagesOf(id)
+        repo.subscribe(id) { incoming ->
+            if (activeRoomId == id) messages = messages + incoming
+        }
+    }
+
+    fun closeRoom() {
+        activeRoomId = null
+        messages = emptyList()
+    }
+
+    fun send(text: String) {
+        val rid = activeRoomId ?: return
+        val body = text.trim()
+        if (body.isEmpty()) return
+        viewModelScope.launch {
+            repo.send(rid, body).onSuccess { messages = messages + it }
+        }
+    }
+
+    fun logout() {
+        repo.close()
+        user = null
+        rooms = emptyList()
+        activeRoomId = null
+        messages = emptyList()
+    }
+}

android/app/src/main/java/com/unibus/app/BusViewModel.kt

@@ -1,162 +0,0 @@
-package com.unibus.app
-
-import android.app.Application
-import androidx.lifecycle.AndroidViewModel
-import androidx.lifecycle.viewModelScope
-import com.unibus.core.mobile.FrameListener
-import com.unibus.core.mobile.Mobile
-import com.unibus.core.mobile.Session
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.flow.MutableStateFlow
-import kotlinx.coroutines.flow.StateFlow
-import kotlinx.coroutines.flow.asStateFlow
-import kotlinx.coroutines.flow.update
-import kotlinx.coroutines.launch
-import java.io.File
-
-/** One chat message shown in the UI. */
-data class ChatMessage(
-    val sender: String,
-    val text: String,
-    val mine: Boolean,
-    val ts: Long,
-)
-
-/** The whole observable UI state of the app. */
-data class BusState(
-    val connecting: Boolean = false,
-    val connected: Boolean = false,
-    val endpointId: String = "",
-    val roomId: String = "",
-    val roomSubject: String = "",
-    val status: String = "",
-    val error: String? = null,
-    val messages: List<ChatMessage> = emptyList(),
-)
-
-/**
- * BusViewModel drives a real unibus peer on the device through the gomobile
- * binding. The binding performs NATS transport and end-to-end crypto natively;
- * this class only translates UI intents into binding calls and exposes the
- * incoming frames as observable state.
- *
- * Threading: every binding call that touches the network (newSession, createRoom,
- * join, publish) runs off the main thread on Dispatchers.IO to avoid
- * NetworkOnMainThreadException. Incoming frames arrive on a JNI-attached NATS
- * goroutine via [onFrame]; we only append to a thread-safe StateFlow there, and
- * Compose collects that flow on the main thread.
- */
-class BusViewModel(app: Application) : AndroidViewModel(app), FrameListener {
-    private val _state = MutableStateFlow(BusState())
-    val state: StateFlow<BusState> = _state.asStateFlow()
-
-    private var session: Session? = null
-    private var myEndpoint: String = ""
-
-    private val idPath: String
-        get() = File(getApplication<Application>().filesDir, "peer.id").absolutePath
-
-    override fun onFrame(roomID: String, sender: String, msgID: String, text: String) {
-        _state.update {
-            it.copy(
-                messages = it.messages + ChatMessage(
-                    sender = sender,
-                    text = text,
-                    mine = sender == myEndpoint,
-                    ts = System.currentTimeMillis(),
-                ),
-            )
-        }
-    }
-
-    fun connect(host: String, nats: String, peerName: String) {
-        if (_state.value.connecting) return
-        _state.update { it.copy(connecting = true, error = null, status = "Conectando…") }
-        viewModelScope.launch(Dispatchers.IO) {
-            try {
-                val s = Mobile.newSession(idPath, nats.trim(), host.trim())
-                session = s
-                myEndpoint = s.endpointID()
-                _state.update {
-                    it.copy(
-                        connecting = false,
-                        connected = true,
-                        endpointId = myEndpoint,
-                        status = "Conectado como $peerName",
-                    )
-                }
-            } catch (e: Exception) {
-                _state.update {
-                    it.copy(connecting = false, connected = false, error = e.message ?: "error desconocido")
-                }
-            }
-        }
-    }
-
-    fun createRoom(subject: String, encrypted: Boolean) {
-        val s = session ?: return
-        viewModelScope.launch(Dispatchers.IO) {
-            try {
-                val mode = if (encrypted) "matrix" else "nats"
-                val roomId = s.createRoom(subject.trim(), mode)
-                s.subscribe(roomId, this@BusViewModel)
-                _state.update {
-                    it.copy(
-                        roomId = roomId,
-                        roomSubject = subject.trim(),
-                        messages = emptyList(),
-                        status = "Room creada",
-                    )
-                }
-            } catch (e: Exception) {
-                _state.update { it.copy(error = e.message ?: "error al crear room") }
-            }
-        }
-    }
-
-    fun joinRoom(roomId: String) {
-        val s = session ?: return
-        viewModelScope.launch(Dispatchers.IO) {
-            try {
-                val rid = roomId.trim()
-                s.join(rid)
-                s.subscribe(rid, this@BusViewModel)
-                _state.update {
-                    it.copy(roomId = rid, roomSubject = "(unida)", messages = emptyList(), status = "Unido a la room")
-                }
-            } catch (e: Exception) {
-                _state.update { it.copy(error = e.message ?: "error al unirse") }
-            }
-        }
-    }
-
-    fun publish(text: String) {
-        val s = session ?: return
-        val room = _state.value.roomId
-        if (room.isEmpty() || text.isBlank()) return
-        viewModelScope.launch(Dispatchers.IO) {
-            try {
-                s.publish(room, text)
-            } catch (e: Exception) {
-                _state.update { it.copy(error = e.message ?: "error al publicar") }
-            }
-        }
-    }
-
-    /** card returns this peer's shareable public identity (no secret). */
-    fun card(): String = try {
-        session?.card() ?: ""
-    } catch (_: Exception) {
-        ""
-    }
-
-    fun clearError() = _state.update { it.copy(error = null) }
-
-    override fun onCleared() {
-        try {
-            session?.close()
-        } catch (_: Exception) {
-        }
-        session = null
-    }
-}

android/app/src/main/java/com/unibus/app/MainActivity.kt

@@ -2,306 +2,62 @@ package com.unibus.app
 
 import android.os.Bundle
 import androidx.activity.ComponentActivity
+import androidx.activity.compose.BackHandler
 import androidx.activity.compose.setContent
-import androidx.activity.viewModels
-import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.lazy.itemsIndexed
-import androidx.compose.foundation.lazy.rememberLazyListState
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.automirrored.filled.Send
-import androidx.compose.material.icons.filled.Add
-import androidx.compose.material.icons.filled.Lock
-import androidx.compose.material3.Button
-import androidx.compose.material3.Card
-import androidx.compose.material3.CircularProgressIndicator
-import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.OutlinedButton
-import androidx.compose.material3.OutlinedTextField
-import androidx.compose.material3.Scaffold
-import androidx.compose.material3.Surface
-import androidx.compose.material3.Switch
-import androidx.compose.material3.Text
-import androidx.compose.material3.TopAppBar
-import androidx.compose.material3.darkColorScheme
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.collectAsState
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.saveable.rememberSaveable
-import androidx.compose.runtime.setValue
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.text.style.TextOverflow
-import androidx.compose.ui.unit.dp
-import java.text.SimpleDateFormat
-import java.util.Date
-import java.util.Locale
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.lifecycle.viewmodel.compose.viewModel
+import com.unibus.app.ui.ChatScreen
+import com.unibus.app.ui.LoginScreen
+import com.unibus.app.ui.RoomListScreen
+import com.unibus.app.ui.theme.LocalUnibusColors
+import com.unibus.app.ui.theme.UnibusColors
+import com.unibus.app.ui.theme.UnibusTheme
 
 class MainActivity : ComponentActivity() {
-    private val vm: BusViewModel by viewModels()
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContent {
-            MaterialTheme(colorScheme = darkColorScheme()) {
-                Surface(modifier = Modifier.fillMaxSize()) {
-                    UnibusApp(vm)
+            UnibusTheme {
+                CompositionLocalProvider(LocalUnibusColors provides UnibusColors()) {
+                    UnibusApp()
                 }
             }
         }
     }
 }
 
+/**
+ * Navegación por estado (sin librería de routing — KISS): el usuario fluye
+ * Login → lista de rooms → chat, igual que la web pero en una sola columna.
+ */
 @Composable
-fun UnibusApp(vm: BusViewModel) {
-    val state by vm.state.collectAsState()
-    if (!state.connected) {
-        ConnectScreen(
-            connecting = state.connecting,
-            error = state.error,
-            onConnect = { host, nats, name -> vm.connect(host, nats, name) },
-        )
-    } else {
-        ChatScreen(state = state, vm = vm)
-    }
-}
+private fun UnibusApp(vm: AppViewModel = viewModel()) {
+    val user = vm.user
+    val activeRoom = vm.activeRoom
 
-@Composable
-fun ConnectScreen(
-    connecting: Boolean,
-    error: String?,
-    onConnect: (String, String, String) -> Unit,
-) {
-    var host by rememberSaveable { mutableStateOf("http://10.0.2.2:8470") }
-    var nats by rememberSaveable { mutableStateOf("nats://10.0.2.2:4250") }
-    var name by rememberSaveable { mutableStateOf("android") }
+    when {
+        user == null -> LoginScreen(
+            connecting = vm.connecting,
+            error = vm.error,
+            onLogin = { handle, password -> vm.connect(handle, password) },
+        )
 
-    Column(
-        modifier = Modifier
-            .fillMaxSize()
-            .padding(24.dp),
-        verticalArrangement = Arrangement.Center,
-    ) {
-        Text("unibus", style = MaterialTheme.typography.headlineMedium)
-        Text(
-            "chat cifrado extremo a extremo sobre NATS",
-            style = MaterialTheme.typography.bodyMedium,
-            color = MaterialTheme.colorScheme.onSurfaceVariant,
+        activeRoom == null -> RoomListScreen(
+            user = user,
+            rooms = vm.rooms,
+            onSelect = { vm.openRoom(it) },
+            onLogout = { vm.logout() },
         )
-        Spacer(Modifier.height(24.dp))
-        OutlinedTextField(
-            value = host,
-            onValueChange = { host = it },
-            label = { Text("Host (control plane)") },
-            singleLine = true,
-            modifier = Modifier.fillMaxWidth(),
-        )
-        Spacer(Modifier.height(12.dp))
-        OutlinedTextField(
-            value = nats,
-            onValueChange = { nats = it },
-            label = { Text("NATS (data plane)") },
-            singleLine = true,
-            modifier = Modifier.fillMaxWidth(),
-        )
-        Spacer(Modifier.height(12.dp))
-        OutlinedTextField(
-            value = name,
-            onValueChange = { name = it },
-            label = { Text("Identidad") },
-            singleLine = true,
-            modifier = Modifier.fillMaxWidth(),
-        )
-        if (error != null) {
-            Spacer(Modifier.height(12.dp))
-            Text(error, color = MaterialTheme.colorScheme.error)
-        }
-        Spacer(Modifier.height(24.dp))
-        Button(
-            onClick = { onConnect(host, nats, name) },
-            enabled = !connecting,
-            modifier = Modifier.fillMaxWidth(),
-        ) {
-            if (connecting) {
-                CircularProgressIndicator(modifier = Modifier.height(18.dp).width(18.dp), strokeWidth = 2.dp)
-                Spacer(Modifier.width(8.dp))
-            }
-            Text(if (connecting) "Conectando…" else "Conectar")
-        }
-    }
-}
 
-@OptIn(ExperimentalMaterial3Api::class)
-@Composable
-fun ChatScreen(state: BusState, vm: BusViewModel) {
-    var subject by rememberSaveable { mutableStateOf("room.general") }
-    var encrypt by rememberSaveable { mutableStateOf(false) }
-    var joinId by rememberSaveable { mutableStateOf("") }
-    var draft by rememberSaveable { mutableStateOf("") }
-    val listState = rememberLazyListState()
-
-    LaunchedEffect(state.messages.size) {
-        if (state.messages.isNotEmpty()) listState.animateScrollToItem(state.messages.size - 1)
-    }
-
-    Scaffold(
-        topBar = {
-            TopAppBar(
-                title = {
-                    Column {
-                        Text("unibus", style = MaterialTheme.typography.titleMedium)
-                        Text(
-                            state.status.ifEmpty { state.endpointId.take(12) + "…" },
-                            style = MaterialTheme.typography.bodySmall,
-                            maxLines = 1,
-                            overflow = TextOverflow.Ellipsis,
-                        )
-                    }
-                },
-            )
-        },
-    ) { inner ->
-        Column(
-            modifier = Modifier
-                .fillMaxSize()
-                .padding(inner)
-                .padding(horizontal = 12.dp),
-        ) {
-            // Room controls.
-            Card(modifier = Modifier.fillMaxWidth().padding(vertical = 8.dp)) {
-                Column(Modifier.padding(12.dp)) {
-                    Row(verticalAlignment = Alignment.CenterVertically) {
-                        OutlinedTextField(
-                            value = subject,
-                            onValueChange = { subject = it },
-                            label = { Text("subject") },
-                            singleLine = true,
-                            modifier = Modifier.weight(1f),
-                        )
-                        Spacer(Modifier.width(8.dp))
-                        Button(onClick = { vm.createRoom(subject, encrypt) }) {
-                            Icon(Icons.Filled.Add, contentDescription = "crear")
-                        }
-                    }
-                    Row(verticalAlignment = Alignment.CenterVertically) {
-                        Switch(checked = encrypt, onCheckedChange = { encrypt = it })
-                        Spacer(Modifier.width(8.dp))
-                        Icon(Icons.Filled.Lock, contentDescription = null, modifier = Modifier.height(16.dp))
-                        Text("cifrar (E2E)", style = MaterialTheme.typography.bodySmall)
-                    }
-                    Spacer(Modifier.height(4.dp))
-                    Row(verticalAlignment = Alignment.CenterVertically) {
-                        OutlinedTextField(
-                            value = joinId,
-                            onValueChange = { joinId = it },
-                            label = { Text("unirse por room id") },
-                            singleLine = true,
-                            modifier = Modifier.weight(1f),
-                        )
-                        Spacer(Modifier.width(8.dp))
-                        OutlinedButton(onClick = { if (joinId.isNotBlank()) vm.joinRoom(joinId) }) {
-                            Text("Unir")
-                        }
-                    }
-                    if (state.roomId.isNotEmpty()) {
-                        Spacer(Modifier.height(4.dp))
-                        Text(
-                            "room: ${state.roomSubject}  ·  ${state.roomId}",
-                            style = MaterialTheme.typography.bodySmall,
-                            color = MaterialTheme.colorScheme.onSurfaceVariant,
-                            maxLines = 1,
-                            overflow = TextOverflow.Ellipsis,
+        else -> {
+            BackHandler { vm.closeRoom() }
+            ChatScreen(
+                room = activeRoom,
+                messages = vm.messages,
+                onSend = { vm.send(it) },
+                onBack = { vm.closeRoom() },
             )
         }
     }
 }
-
-            if (state.error != null) {
-                Text(
-                    state.error,
-                    color = MaterialTheme.colorScheme.error,
-                    modifier = Modifier.fillMaxWidth().padding(vertical = 4.dp),
-                )
-            }
-
-            // Messages.
-            LazyColumn(
-                state = listState,
-                modifier = Modifier.weight(1f).fillMaxWidth(),
-                verticalArrangement = Arrangement.spacedBy(6.dp),
-            ) {
-                itemsIndexed(state.messages, key = { i, m -> "${m.ts}-$i" }) { _, m ->
-                    MessageBubble(m)
-                }
-            }
-
-            // Composer.
-            Row(
-                modifier = Modifier.fillMaxWidth().padding(vertical = 8.dp),
-                verticalAlignment = Alignment.CenterVertically,
-            ) {
-                OutlinedTextField(
-                    value = draft,
-                    onValueChange = { draft = it },
-                    placeholder = { Text("Mensaje…") },
-                    singleLine = true,
-                    enabled = state.roomId.isNotEmpty(),
-                    modifier = Modifier.weight(1f),
-                )
-                Spacer(Modifier.width(8.dp))
-                IconButton(
-                    onClick = {
-                        vm.publish(draft)
-                        draft = ""
-                    },
-                    enabled = state.roomId.isNotEmpty() && draft.isNotBlank(),
-                ) {
-                    Icon(Icons.AutoMirrored.Filled.Send, contentDescription = "enviar")
-                }
-            }
-        }
-    }
-}
-
-private val timeFmt = SimpleDateFormat("HH:mm:ss", Locale.getDefault())
-
-@Composable
-fun MessageBubble(m: ChatMessage) {
-    val align = if (m.mine) Alignment.End else Alignment.Start
-    Column(modifier = Modifier.fillMaxWidth(), horizontalAlignment = align) {
-        Card(
-            modifier = Modifier.fillMaxWidth(0.8f),
-        ) {
-            Column(Modifier.padding(8.dp)) {
-                if (!m.mine) {
-                    Text(
-                        m.sender.take(12) + "…",
-                        style = MaterialTheme.typography.labelSmall,
-                        color = MaterialTheme.colorScheme.primary,
-                    )
-                }
-                Text(m.text, style = MaterialTheme.typography.bodyMedium)
-                Text(
-                    timeFmt.format(Date(m.ts)),
-                    style = MaterialTheme.typography.labelSmall,
-                    color = MaterialTheme.colorScheme.onSurfaceVariant,
-                )
-            }
-        }
-    }
-}

android/app/src/main/java/com/unibus/app/data/BindingRepository.kt

@@ -0,0 +1,157 @@
+package com.unibus.app.data
+
+import android.content.Context
+import android.os.Handler
+import android.os.Looper
+import com.unibus.core.mobile.FrameListener
+import com.unibus.core.mobile.Mobile
+import com.unibus.core.mobile.Session
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.Json
+import java.io.File
+
+/**
+ * Implementación real sobre el binding gomobile (pkg/client): cifrado de extremo
+ * a extremo EN el dispositivo, igual que cualquier otro peer del bus. Comparte
+ * interfaz con [MockUnibusRepository], así que la UI no cambia al enchufarla.
+ *
+ * Estado: cableado completo y compilable contra unibus.aar. La iteración 1 de la
+ * app corre sobre el mock para iterar el diseño; para activar el bus real basta
+ * con instanciar este repo en [com.unibus.app.MainActivity] pasando las URLs del
+ * bus y (si el bus exige TLS+auth) el ca.crt en assets.
+ *
+ * Contrato de membresía (issue 0006e): tras CreateRoom / Join / Invite hay que
+ * llamar [refresh] ANTES de subscribe/publish en esa room, o un bus seguro
+ * deniega el subject. refresh() además tira las suscripciones: re-suscribir luego.
+ */
+class BindingUnibusRepository(
+    context: Context,
+    private val natsURL: String,
+    private val ctrlURL: String,
+) : UnibusRepository {
+
+    private val appContext = context.applicationContext
+    private val mainHandler = Handler(Looper.getMainLooper())
+    private val json = Json { ignoreUnknownKeys = true }
+
+    private var session: Session? = null
+    private var user: User? = null
+
+    @Serializable
+    private data class RoomDTO(
+        val room_id: String,
+        val subject: String,
+        val epoch: Int = 0,
+        val encrypted: Boolean = false,
+        val role: String = "",
+    )
+
+    /** Ruta sandbox de la identidad de larga duración (claves privadas). */
+    private fun identityPath(): String =
+        File(appContext.filesDir, "identity.key").absolutePath
+
+    /**
+     * Copia ca.crt de assets a un fichero local y devuelve su ruta; "" si no hay
+     * (bus de desarrollo en texto plano). El binding pinea TLS a este CA cuando
+     * la ruta no está vacía.
+     */
+    private fun caPathOrEmpty(): String {
+        return try {
+            val out = File(appContext.filesDir, "ca.crt")
+            appContext.assets.open("ca.crt").use { input ->
+                out.outputStream().use { input.copyTo(it) }
+            }
+            out.absolutePath
+        } catch (_: Exception) {
+            ""
+        }
+    }
+
+    override suspend fun connect(handle: String, password: String): Result<User> =
+        withContext(Dispatchers.IO) {
+            try {
+                // La identidad se persiste cifrada en el sandbox; password la
+                // desbloquea en una iteración futura (hoy LoadOrCreateIdentity la
+                // crea/lee directamente). handle es la etiqueta visible local.
+                Mobile.generateIdentity(identityPath())
+                val s = Mobile.newSession(identityPath(), natsURL, ctrlURL, caPathOrEmpty())
+                session = s
+                val u = User(id = s.endpointID(), handle = handle)
+                user = u
+                Result.success(u)
+            } catch (e: Exception) {
+                Result.failure(e)
+            }
+        }
+
+    override suspend fun listRooms(): List<Room> = withContext(Dispatchers.IO) {
+        val s = session ?: return@withContext emptyList()
+        val raw = runCatching { s.listRoomsJSON() }.getOrDefault("[]")
+        val dtos = runCatching { json.decodeFromString<List<RoomDTO>>(raw) }.getOrDefault(emptyList())
+        dtos.map {
+            Room(
+                id = it.room_id,
+                name = it.subject,
+                encrypted = it.encrypted,
+                lastMessage = "",
+                lastTs = System.currentTimeMillis(),
+                unread = 0,
+                messages = emptyList(),
+            )
+        }
+    }
+
+    override fun messagesOf(roomId: String): List<Message> = emptyList()
+
+    override fun subscribe(roomId: String, onMessage: (Message) -> Unit) {
+        val s = session ?: return
+        val myId = user?.id
+        // FrameListener.onFrame llega en una goroutine de NATS: saltamos al hilo
+        // principal antes de tocar estado de Compose.
+        val listener = object : FrameListener {
+            override fun onFrame(rid: String, sender: String, msgID: String, text: String) {
+                val msg = Message(
+                    id = msgID,
+                    sender = sender,
+                    body = text,
+                    ts = System.currentTimeMillis(),
+                    mine = sender == myId,
+                )
+                mainHandler.post { onMessage(msg) }
+            }
+        }
+        runCatching { s.subscribe(roomId, listener) }
+    }
+
+    override suspend fun send(roomId: String, text: String): Result<Message> =
+        withContext(Dispatchers.IO) {
+            val s = session ?: return@withContext Result.failure(IllegalStateException("sin sesión"))
+            try {
+                s.publish(roomId, text)
+                Result.success(
+                    Message(
+                        id = "local-${System.currentTimeMillis()}",
+                        sender = user?.id ?: "yo",
+                        body = text,
+                        ts = System.currentTimeMillis(),
+                        mine = true,
+                    ),
+                )
+            } catch (e: Exception) {
+                Result.failure(e)
+            }
+        }
+
+    /** Reaplica permisos tras un cambio de membresía. Re-suscribir después. */
+    suspend fun refresh(): Result<Unit> = withContext(Dispatchers.IO) {
+        runCatching { session?.refreshSession(); Unit }
+    }
+
+    override fun close() {
+        runCatching { session?.close() }
+        session = null
+        user = null
+    }
+}

android/app/src/main/java/com/unibus/app/data/MockData.kt

@@ -0,0 +1,59 @@
+package com.unibus.app.data
+
+// Datos de muestra para iterar el diseño sin el bus conectado (espejo de mock.ts).
+private const val NOW = 1749300000000L
+private fun m(n: Int): Long = NOW - n * 60_000L
+
+val MOCK_ROOMS: List<Room> = listOf(
+    Room(
+        id = "general",
+        name = "general",
+        encrypted = true,
+        lastMessage = "¿Lo desplegamos hoy?",
+        lastTs = m(2),
+        unread = 3,
+        messages = listOf(
+            Message("1", "ana", "Buenas, ¿cómo va el cluster?", m(40)),
+            Message("2", "lucas", "Los 3 nodos en R3, quorum verde", m(38), mine = true),
+            Message("3", "ana", "Brutal. ¿Y el frontend?", m(30)),
+            Message("4", "leo", "Primera iteración lista, estilo Element", m(6)),
+            Message("5", "ana", "¿Lo desplegamos hoy?", m(2)),
+        ),
+    ),
+    Room(
+        id = "board",
+        name = "board · privado",
+        encrypted = true,
+        lastMessage = "Os paso el acta cifrada",
+        lastTs = m(95),
+        unread = 0,
+        messages = listOf(
+            Message("1", "ceo", "Reunión a las 18:00", m(120)),
+            Message("2", "lucas", "Anotado", m(96), mine = true),
+            Message("3", "ceo", "Os paso el acta cifrada", m(95)),
+        ),
+    ),
+    Room(
+        id = "bots",
+        name = "bots",
+        encrypted = false,
+        lastMessage = "echo: ping",
+        lastTs = m(210),
+        unread = 0,
+        messages = listOf(
+            Message("1", "lucas", "!ping", m(212), mine = true),
+            Message("2", "echobot", "echo: ping", m(210)),
+        ),
+    ),
+    Room(
+        id = "infra",
+        name = "infra",
+        encrypted = true,
+        lastMessage = "magnus + homer + datardos OK",
+        lastTs = m(330),
+        unread = 1,
+        messages = listOf(
+            Message("1", "leo", "magnus + homer + datardos OK", m(330)),
+        ),
+    ),
+)

android/app/src/main/java/com/unibus/app/data/Models.kt

@@ -0,0 +1,30 @@
+package com.unibus.app.data
+
+/**
+ * Modelos de dominio de la UI. En la iteración 1 se llenan con datos mock; más
+ * adelante vendrán del binding gomobile (pkg/client) a través de
+ * [UnibusRepository]. Reflejan los tipos de la app web (types.ts).
+ */
+
+data class User(
+    val id: String,
+    val handle: String,
+)
+
+data class Message(
+    val id: String,
+    val sender: String, // handle
+    val body: String,
+    val ts: Long, // epoch ms
+    val mine: Boolean = false,
+)
+
+data class Room(
+    val id: String,
+    val name: String,
+    val encrypted: Boolean,
+    val lastMessage: String,
+    val lastTs: Long,
+    val unread: Int,
+    val messages: List<Message>,
+)

android/app/src/main/java/com/unibus/app/data/Repository.kt

@@ -0,0 +1,74 @@
+package com.unibus.app.data
+
+/**
+ * Capa de repositorio que aísla la UI de la fuente de datos. La iteración 1 usa
+ * [MockUnibusRepository] (en memoria) para iterar el diseño. Cuando se enchufe
+ * el bus real, [BindingUnibusRepository] (en BindingRepository.kt) implementa
+ * esta misma interfaz sobre el binding gomobile (pkg/client), sin tocar la UI.
+ */
+interface UnibusRepository {
+    /** Desbloquea/crea la identidad y conecta al bus. Devuelve el usuario logueado. */
+    suspend fun connect(handle: String, password: String): Result<User>
+
+    /** Rooms a las que pertenece el peer. */
+    suspend fun listRooms(): List<Room>
+
+    /** Mensajes históricos conocidos de una room (mock: los del propio Room). */
+    fun messagesOf(roomId: String): List<Message>
+
+    /**
+     * Suscribe a una room. [onMessage] se invoca por cada mensaje entrante.
+     * Las implementaciones que vienen del bus DEBEN entregar [onMessage] en el
+     * hilo principal (el binding lo recibe en una goroutine de NATS).
+     */
+    fun subscribe(roomId: String, onMessage: (Message) -> Unit)
+
+    /** Publica texto en la room. */
+    suspend fun send(roomId: String, text: String): Result<Message>
+
+    /** Cierra la sesión. */
+    fun close()
+}
+
+/**
+ * Implementación en memoria: arranca con [MOCK_ROOMS] y acumula los mensajes que
+ * el usuario envía. No toca red ni binding — sirve para construir y revisar la UI.
+ */
+class MockUnibusRepository : UnibusRepository {
+    private var user: User? = null
+    private val sent = mutableMapOf<String, MutableList<Message>>()
+
+    override suspend fun connect(handle: String, password: String): Result<User> {
+        val u = User(id = handle, handle = handle)
+        user = u
+        return Result.success(u)
+    }
+
+    override suspend fun listRooms(): List<Room> = MOCK_ROOMS
+
+    override fun messagesOf(roomId: String): List<Message> {
+        val base = MOCK_ROOMS.firstOrNull { it.id == roomId }?.messages.orEmpty()
+        return base + (sent[roomId].orEmpty())
+    }
+
+    override fun subscribe(roomId: String, onMessage: (Message) -> Unit) {
+        // El mock no recibe tráfico entrante; el eco lo gestiona la UI al enviar.
+    }
+
+    override suspend fun send(roomId: String, text: String): Result<Message> {
+        val handle = user?.handle ?: "yo"
+        val msg = Message(
+            id = "local-${System.currentTimeMillis()}",
+            sender = handle,
+            body = text,
+            ts = System.currentTimeMillis(),
+            mine = true,
+        )
+        sent.getOrPut(roomId) { mutableListOf() }.add(msg)
+        return Result.success(msg)
+    }
+
+    override fun close() {
+        user = null
+    }
+}

android/app/src/main/java/com/unibus/app/ui/ChatScreen.kt

@@ -0,0 +1,203 @@
+package com.unibus.app.ui
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+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.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.text.KeyboardActions
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.automirrored.filled.Send
+import androidx.compose.material.icons.filled.AttachFile
+import androidx.compose.material.icons.filled.Lock
+import androidx.compose.material.icons.filled.MoreVert
+import androidx.compose.material.icons.filled.Tag
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextFieldDefaults
+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.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+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.unibus.app.data.Message
+import com.unibus.app.data.Room
+import com.unibus.app.ui.theme.Brand3
+import com.unibus.app.ui.theme.LocalUnibusColors
+
+@Composable
+fun ChatScreen(
+    room: Room,
+    messages: List<Message>,
+    onSend: (String) -> Unit,
+    onBack: () -> Unit,
+) {
+    val colors = LocalUnibusColors.current
+    var draft by remember { mutableStateOf("") }
+    val listState = rememberLazyListState()
+
+    LaunchedEffect(messages.size, room.id) {
+        if (messages.isNotEmpty()) listState.animateScrollToItem(messages.size - 1)
+    }
+
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(colors.chatBg),
+    ) {
+        // Header
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 6.dp, vertical = 8.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            IconButton(onClick = onBack) {
+                Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = "Atrás", tint = Color.White)
+            }
+            InitialsAvatar(room.name, size = 38.dp, rounded = true, accent = true)
+            Column(
+                modifier = Modifier
+                    .weight(1f)
+                    .padding(start = 10.dp),
+            ) {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    Text(
+                        room.name,
+                        fontWeight = FontWeight(650),
+                        fontSize = 16.sp,
+                        color = Color.White,
+                        maxLines = 1,
+                        overflow = TextOverflow.Ellipsis,
+                    )
+                    Icon(
+                        if (room.encrypted) Icons.Filled.Lock else Icons.Filled.Tag,
+                        contentDescription = null,
+                        tint = colors.dimmed,
+                        modifier = Modifier
+                            .padding(start = 6.dp)
+                            .size(14.dp),
+                    )
+                }
+                Text(
+                    if (room.encrypted) "cifrada · E2E" else "abierta · cleartext",
+                    color = colors.dimmed,
+                    fontSize = 11.sp,
+                )
+            }
+            IconButton(onClick = { /* opciones de room (futuro) */ }) {
+                Icon(Icons.Filled.MoreVert, contentDescription = "Opciones", tint = colors.dimmed)
+            }
+        }
+        HorizontalDivider(color = colors.divider)
+
+        // Mensajes
+        LazyColumn(
+            state = listState,
+            modifier = Modifier
+                .weight(1f)
+                .fillMaxWidth(),
+            contentPadding = androidx.compose.foundation.layout.PaddingValues(14.dp),
+            verticalArrangement = Arrangement.spacedBy(16.dp),
+        ) {
+            items(messages, key = { it.id }) { msg -> MessageRow(msg) }
+        }
+
+        HorizontalDivider(color = colors.divider)
+
+        // Composer
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(8.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            IconButton(onClick = { /* adjuntar (futuro) */ }) {
+                Icon(Icons.Filled.AttachFile, contentDescription = "Adjuntar", tint = colors.dimmed)
+            }
+            OutlinedTextField(
+                value = draft,
+                onValueChange = { draft = it },
+                placeholder = { Text("Mensaje a ${room.name}") },
+                singleLine = true,
+                shape = CircleShape,
+                colors = TextFieldDefaults.colors(
+                    focusedContainerColor = colors.field,
+                    unfocusedContainerColor = colors.field,
+                ),
+                modifier = Modifier.weight(1f),
+                keyboardOptions = KeyboardOptions(imeAction = androidx.compose.ui.text.input.ImeAction.Send),
+                keyboardActions = KeyboardActions(onSend = {
+                    if (draft.trim().isNotEmpty()) { onSend(draft); draft = "" }
+                }),
+            )
+            Box(
+                modifier = Modifier
+                    .padding(start = 6.dp)
+                    .size(46.dp)
+                    .clip(CircleShape)
+                    .background(if (draft.trim().isEmpty()) colors.field else colors.brand),
+                contentAlignment = Alignment.Center,
+            ) {
+                IconButton(
+                    onClick = { if (draft.trim().isNotEmpty()) { onSend(draft); draft = "" } },
+                    enabled = draft.trim().isNotEmpty(),
+                ) {
+                    Icon(Icons.AutoMirrored.Filled.Send, contentDescription = "Enviar", tint = Color.White)
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun MessageRow(msg: Message) {
+    val colors = LocalUnibusColors.current
+    Row(verticalAlignment = Alignment.Top) {
+        InitialsAvatar(msg.sender, size = 36.dp, rounded = false, accent = msg.mine)
+        Column(modifier = Modifier.padding(start = 10.dp)) {
+            Row(verticalAlignment = Alignment.Bottom) {
+                Text(
+                    msg.sender,
+                    fontWeight = FontWeight.SemiBold,
+                    fontSize = 14.sp,
+                    color = if (msg.mine) Brand3 else Color.White,
+                )
+                Text(
+                    timeShort(msg.ts),
+                    color = colors.dimmed,
+                    fontSize = 11.sp,
+                    modifier = Modifier.padding(start = 8.dp),
+                )
+            }
+            Text(
+                msg.body,
+                fontSize = 14.sp,
+                color = com.unibus.app.ui.theme.OnSurface,
+                modifier = Modifier.padding(top = 1.dp),
+            )
+        }
+    }
+}

android/app/src/main/java/com/unibus/app/ui/Components.kt

@@ -0,0 +1,48 @@
+package com.unibus.app.ui
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
+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.text.font.FontWeight
+import androidx.compose.ui.unit.Dp
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.unibus.app.ui.theme.Brand5
+
+/**
+ * Avatar con iniciales, equivalente al <Avatar> de la web. [rounded] = esquinas
+ * (rooms/chat header) vs círculo (usuarios). [accent] colorea el de marca.
+ */
+@Composable
+fun InitialsAvatar(
+    text: String,
+    size: Dp = 42.dp,
+    rounded: Boolean = true,
+    accent: Boolean = false,
+    modifier: Modifier = Modifier,
+) {
+    val shape = if (rounded) RoundedCornerShape((size.value * 0.28f).dp) else CircleShape
+    val bg = if (accent) Brand5 else Color(0xFF3A3D44) // gris neutro tipo Avatar color="gray"
+    Box(
+        modifier = modifier
+            .size(size)
+            .clip(shape)
+            .background(bg),
+        contentAlignment = Alignment.Center,
+    ) {
+        Text(
+            text = initials(text),
+            color = Color.White,
+            fontWeight = FontWeight.SemiBold,
+            fontSize = (size.value * 0.36f).sp,
+        )
+    }
+}

android/app/src/main/java/com/unibus/app/ui/LoginScreen.kt

@@ -0,0 +1,154 @@
+package com.unibus.app.ui
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.text.KeyboardActions
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Lock
+import androidx.compose.material.icons.filled.VpnKey
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.Icon
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.unibus.app.ui.theme.Brand4
+import com.unibus.app.ui.theme.Dark7
+import com.unibus.app.ui.theme.Dark9
+import com.unibus.app.ui.theme.LocalUnibusColors
+
+@Composable
+fun LoginScreen(
+    connecting: Boolean,
+    error: String?,
+    onLogin: (handle: String, password: String) -> Unit,
+) {
+    val colors = LocalUnibusColors.current
+    var handle by remember { mutableStateOf("") }
+    var password by remember { mutableStateOf("") }
+    val ready = handle.trim().isNotEmpty() && password.isNotEmpty() && !connecting
+
+    fun submit() {
+        if (ready) onLogin(handle.trim(), password)
+    }
+
+    Box(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(Dark9),
+        contentAlignment = Alignment.Center,
+    ) {
+        Card(
+            modifier = Modifier
+                .padding(24.dp)
+                .fillMaxWidth(),
+            colors = CardDefaults.cardColors(containerColor = Dark7),
+            shape = androidx.compose.foundation.shape.RoundedCornerShape(16.dp),
+        ) {
+            Column(
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(28.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
+                verticalArrangement = Arrangement.spacedBy(18.dp),
+            ) {
+                // ThemeIcon "light brand" — círculo translúcido con candado.
+                Box(
+                    modifier = Modifier
+                        .size(60.dp)
+                        .clip(CircleShape)
+                        .background(Brand4.copy(alpha = 0.18f)),
+                    contentAlignment = Alignment.Center,
+                ) {
+                    Icon(
+                        Icons.Filled.Lock,
+                        contentDescription = null,
+                        tint = Brand4,
+                        modifier = Modifier.size(30.dp),
+                    )
+                }
+
+                Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                    Text("unibus", fontSize = 26.sp, color = Brand4)
+                    Text(
+                        "Mensajería cifrada de extremo a extremo",
+                        color = colors.dimmed,
+                        fontSize = 13.sp,
+                        textAlign = TextAlign.Center,
+                    )
+                }
+
+                OutlinedTextField(
+                    value = handle,
+                    onValueChange = { handle = it },
+                    label = { Text("Identidad") },
+                    placeholder = { Text("tu-handle") },
+                    singleLine = true,
+                    modifier = Modifier.fillMaxWidth(),
+                    keyboardOptions = KeyboardOptions(imeAction = ImeAction.Next),
+                )
+
+                OutlinedTextField(
+                    value = password,
+                    onValueChange = { password = it },
+                    label = { Text("Contraseña") },
+                    placeholder = { Text("••••••••") },
+                    singleLine = true,
+                    visualTransformation = PasswordVisualTransformation(),
+                    leadingIcon = { Icon(Icons.Filled.VpnKey, contentDescription = null) },
+                    modifier = Modifier.fillMaxWidth(),
+                    keyboardOptions = KeyboardOptions(imeAction = ImeAction.Go),
+                    keyboardActions = KeyboardActions(onGo = { submit() }),
+                )
+                Text(
+                    "Desbloquea tu identidad cifrada en este dispositivo",
+                    color = colors.dimmed,
+                    fontSize = 12.sp,
+                    modifier = Modifier.fillMaxWidth(),
+                )
+
+                if (error != null) {
+                    Text(error, color = androidx.compose.ui.graphics.Color(0xFFFF6B6B), fontSize = 13.sp)
+                }
+
+                Button(
+                    onClick = { submit() },
+                    enabled = ready,
+                    modifier = Modifier.fillMaxWidth(),
+                ) {
+                    if (connecting) {
+                        CircularProgressIndicator(
+                            modifier = Modifier.size(18.dp),
+                            strokeWidth = 2.dp,
+                            color = androidx.compose.ui.graphics.Color.White,
+                        )
+                    } else {
+                        Text("Conectar")
+                    }
+                }
+            }
+        }
+    }
+}

android/app/src/main/java/com/unibus/app/ui/RoomListScreen.kt

@@ -0,0 +1,199 @@
+package com.unibus.app.ui
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+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.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.Logout
+import androidx.compose.material.icons.filled.Lock
+import androidx.compose.material.icons.filled.MoreVert
+import androidx.compose.material.icons.filled.Search
+import androidx.compose.material.icons.filled.Tag
+import androidx.compose.material3.Badge
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
+import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+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.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.unibus.app.data.Room
+import com.unibus.app.data.User
+import com.unibus.app.ui.theme.LocalUnibusColors
+
+@Composable
+fun RoomListScreen(
+    user: User,
+    rooms: List<Room>,
+    onSelect: (String) -> Unit,
+    onLogout: () -> Unit,
+) {
+    val colors = LocalUnibusColors.current
+    var query by remember { mutableStateOf("") }
+    val q = query.trim().lowercase()
+    val filtered = if (q.isEmpty()) rooms else rooms.filter {
+        it.name.lowercase().contains(q) || it.messages.any { m -> m.body.lowercase().contains(q) }
+    }
+
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(colors.sidebarBg),
+    ) {
+        // Header: avatar + handle + menú
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 12.dp, vertical = 10.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            InitialsAvatar(user.handle, size = 36.dp, rounded = false, accent = true)
+            Text(
+                user.handle,
+                fontWeight = FontWeight.SemiBold,
+                fontSize = 15.sp,
+                color = Color.White,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis,
+                modifier = Modifier
+                    .weight(1f)
+                    .padding(start = 10.dp),
+            )
+            var menuOpen by remember { mutableStateOf(false) }
+            Box {
+                IconButton(onClick = { menuOpen = true }) {
+                    Icon(Icons.Filled.MoreVert, contentDescription = "Menú", tint = colors.dimmed)
+                }
+                DropdownMenu(expanded = menuOpen, onDismissRequest = { menuOpen = false }) {
+                    DropdownMenuItem(
+                        text = { Text("Desconectar") },
+                        onClick = { menuOpen = false; onLogout() },
+                        leadingIcon = {
+                            Icon(Icons.AutoMirrored.Filled.Logout, contentDescription = null, modifier = Modifier.size(18.dp))
+                        },
+                    )
+                }
+            }
+        }
+
+        // Buscador
+        OutlinedTextField(
+            value = query,
+            onValueChange = { query = it },
+            placeholder = { Text("Buscar rooms, usuarios, mensajes…") },
+            leadingIcon = { Icon(Icons.Filled.Search, contentDescription = null, modifier = Modifier.size(18.dp)) },
+            singleLine = true,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 12.dp, vertical = 4.dp),
+        )
+
+        HorizontalDivider(color = colors.divider)
+
+        if (filtered.isEmpty()) {
+            Text(
+                "Sin resultados",
+                color = colors.dimmed,
+                fontSize = 14.sp,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .padding(top = 24.dp),
+                textAlign = androidx.compose.ui.text.style.TextAlign.Center,
+            )
+        } else {
+            LazyColumn(
+                modifier = Modifier.fillMaxSize(),
+                contentPadding = androidx.compose.foundation.layout.PaddingValues(6.dp),
+                verticalArrangement = Arrangement.spacedBy(2.dp),
+            ) {
+                items(filtered, key = { it.id }) { room ->
+                    RoomItem(room = room, onClick = { onSelect(room.id) })
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun RoomItem(room: Room, onClick: () -> Unit) {
+    val colors = LocalUnibusColors.current
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clip(RoundedCornerShape(10.dp))
+            .clickable(onClick = onClick)
+            .padding(8.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        InitialsAvatar(room.name, size = 46.dp, rounded = true)
+        Column(
+            modifier = Modifier
+                .weight(1f)
+                .padding(start = 10.dp),
+        ) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Icon(
+                    if (room.encrypted) Icons.Filled.Lock else Icons.Filled.Tag,
+                    contentDescription = if (room.encrypted) "cifrada" else "abierta",
+                    tint = colors.dimmed,
+                    modifier = Modifier.size(13.dp),
+                )
+                Text(
+                    room.name,
+                    fontWeight = FontWeight.SemiBold,
+                    fontSize = 14.sp,
+                    color = Color.White,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis,
+                    modifier = Modifier
+                        .weight(1f)
+                        .padding(start = 4.dp),
+                )
+                Text(timeShort(room.lastTs), color = colors.dimmed, fontSize = 11.sp)
+            }
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                modifier = Modifier.padding(top = 2.dp),
+            ) {
+                Text(
+                    room.lastMessage,
+                    color = colors.dimmed,
+                    fontSize = 12.sp,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis,
+                    modifier = Modifier.weight(1f),
+                )
+                if (room.unread > 0) {
+                    Badge(
+                        containerColor = colors.brand,
+                        contentColor = Color.White,
+                    ) { Text(room.unread.toString()) }
+                }
+            }
+        }
+    }
+}

android/app/src/main/java/com/unibus/app/ui/Util.kt

@@ -0,0 +1,17 @@
+package com.unibus.app.ui
+
+import java.util.Calendar
+
+/** Iniciales (hasta 2 letras/dígitos) para los avatares, igual que la web. */
+fun initials(s: String): String {
+    val cleaned = s.filter { it.isLetterOrDigit() }
+    return if (cleaned.isEmpty()) "?" else cleaned.take(2).uppercase()
+}
+
+/** Hora corta HH:mm a partir de epoch ms. */
+fun timeShort(ts: Long): String {
+    val c = Calendar.getInstance().apply { timeInMillis = ts }
+    val h = c.get(Calendar.HOUR_OF_DAY).toString().padStart(2, '0')
+    val min = c.get(Calendar.MINUTE).toString().padStart(2, '0')
+    return "$h:$min"
+}

android/app/src/main/java/com/unibus/app/ui/theme/Theme.kt

@@ -0,0 +1,80 @@
+package com.unibus.app.ui.theme
+
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Typography
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.staticCompositionLocalOf
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+// --- Brand: índigo/violeta de unibus (mismos tonos que el tema Mantine de la web) ---
+val Brand2 = Color(0xFFB5A3F5) // brand.2
+val Brand3 = Color(0xFF8D70ED) // brand.3 — legible sobre fondo oscuro
+val Brand4 = Color(0xFF6C47E6) // brand.4 — acento principal
+val Brand5 = Color(0xFF5A2FE2) // brand.5 — filled
+
+// --- Grises oscuros equivalentes a la escala dark.* de Mantine ---
+val Dark9 = Color(0xFF101113) // fondo de la app (login)
+val Dark8 = Color(0xFF141517) // sidebar / lista de rooms
+val Dark7 = Color(0xFF1A1B1E) // panel de chat / superficie
+val Dark6 = Color(0xFF25262B) // item activo / elevado
+val Dark5 = Color(0xFF2C2E33) // campos de entrada
+val Dark4 = Color(0xFF373A40) // bordes / divisores
+val Dimmed = Color(0xFF909296) // texto secundario
+val OnSurface = Color(0xFFE3E3E6) // texto principal
+
+/**
+ * Tokens de color que Material 3 no expresa directamente y que la UI replica de
+ * la web (matices dark.6/7/8/9, color "dimmed", borde). Se exponen vía un
+ * CompositionLocal para que cualquier composable los lea sin prop-drilling.
+ */
+data class UnibusColors(
+    val appBg: Color = Dark9,
+    val sidebarBg: Color = Dark8,
+    val chatBg: Color = Dark7,
+    val activeItem: Color = Dark6,
+    val field: Color = Dark5,
+    val divider: Color = Dark4,
+    val dimmed: Color = Dimmed,
+    val brand: Color = Brand4,
+)
+
+val LocalUnibusColors = staticCompositionLocalOf { UnibusColors() }
+
+private val UnibusDarkScheme = darkColorScheme(
+    primary = Brand4,
+    onPrimary = Color.White,
+    primaryContainer = Brand5,
+    onPrimaryContainer = Color.White,
+    secondary = Brand3,
+    background = Dark9,
+    onBackground = OnSurface,
+    surface = Dark7,
+    onSurface = OnSurface,
+    surfaceVariant = Dark6,
+    onSurfaceVariant = Dimmed,
+    outline = Dark4,
+    error = Color(0xFFFF6B6B),
+)
+
+private val UnibusTypography = Typography(
+    titleLarge = Typography().titleLarge.copy(fontWeight = FontWeight(650)),
+    titleMedium = Typography().titleMedium.copy(fontWeight = FontWeight(650)),
+    bodyMedium = Typography().bodyMedium.copy(fontSize = 14.sp),
+    labelLarge = Typography().labelLarge.copy(fontWeight = FontWeight.SemiBold),
+)
+
+@Composable
+fun UnibusTheme(content: @Composable () -> Unit) {
+    // unibus es dark-first; ignoramos el modo del sistema a propósito.
+    @Suppress("UNUSED_EXPRESSION")
+    isSystemInDarkTheme()
+    MaterialTheme(
+        colorScheme = UnibusDarkScheme,
+        typography = UnibusTypography,
+        content = content,
+    )
+}

android/app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <!-- Material "lock" glyph, white, centered in the adaptive-icon safe zone.
+         24dp source scaled x3 (=72dp) and translated by 18 to center it. -->
+    <group
+        android:scaleX="3"
+        android:scaleY="3"
+        android:translateX="18"
+        android:translateY="18">
+        <path
+            android:fillColor="#FFFFFF"
+            android:pathData="M12,17c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM18,8h-1V6c0,-2.76 -2.24,-5 -5,-5S7,3.24 7,6v2H6c-1.1,0 -2,0.9 -2,2v10c0,1.1 0.9,2 2,2h12c1.1,0 2,-0.9 2,-2V10c0,-1.1 -0.9,-2 -2,-2zM9,6c0,-1.66 1.34,-3 3,-3s3,1.34 3,3v2H9V6z" />
+    </group>
+</vector>

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/unibus_brand" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/unibus_brand" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

android/app/src/main/res/values/colors.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- dark.9 — app background -->
+    <color name="unibus_bg">#101113</color>
+    <!-- brand.5 — índigo/violeta accent, used as launcher icon background -->
+    <color name="unibus_brand">#5A2FE2</color>
+</resources>

android/app/src/main/res/values/themes.xml

@@ -1,6 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <!-- A minimal Material3 base theme; the real UI styling is driven by Compose
-         Material3 (MaterialTheme) at runtime. -->
-    <style name="Theme.Unibus" parent="android:Theme.Material.NoActionBar" />
+    <!-- Compose-only host theme: no action bar, dark window background matching
+         the app's dark.9 surface so there is no white flash before Compose draws. -->
+    <style name="Theme.Unibus" parent="android:Theme.Material.NoActionBar">
+        <item name="android:windowBackground">@color/unibus_bg</item>
+        <item name="android:statusBarColor">@color/unibus_bg</item>
+        <item name="android:navigationBarColor">@color/unibus_bg</item>
+        <item name="android:windowLightStatusBar">false</item>
+    </style>
 </resources>

android/build.gradle.kts

@@ -1,8 +1,5 @@
-// Top-level build file. Plugin versions are declared here and applied in the
-// module build scripts. AGP 8.5 + Kotlin 2.0 (with the dedicated Compose
-// compiler plugin) target the locally installed SDK (compileSdk 34).
 plugins {
     id("com.android.application") version "8.5.2" apply false
-    id("org.jetbrains.kotlin.android") version "2.0.21" apply false
-    id("org.jetbrains.kotlin.plugin.compose") version "2.0.21" apply false
+    id("org.jetbrains.kotlin.android") version "1.9.24" apply false
+    id("org.jetbrains.kotlin.plugin.serialization") version "1.9.24" apply false
 }

android/gradle.properties

@@ -1,5 +1,5 @@
 org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
-org.gradle.caching=true
 android.useAndroidX=true
 android.nonTransitiveRClass=true
 kotlin.code.style=official
+org.gradle.caching=true

android/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

android/gradlew

@@ -15,8 +15,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-# SPDX-License-Identifier: Apache-2.0
-#
 
 ##############################################################################
 #
@@ -57,7 +55,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -86,8 +84,7 @@ done
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
 # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
-' "$PWD" ) || exit
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum

android/gradlew.bat

@@ -13,8 +13,6 @@
 @rem See the License for the specific language governing permissions and
 @rem limitations under the License.
 @rem
-@rem SPDX-License-Identifier: Apache-2.0
-@rem
 
 @if "%DEBUG%"=="" @echo off
 @rem ##########################################################################

android/settings.gradle.kts

@@ -11,6 +11,7 @@ pluginManagement {
         gradlePluginPortal()
     }
 }
+
 dependencyResolutionManagement {
     repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
     repositories {

mobile/gen_aar.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+# Regenera el binding gomobile (unibus.aar) a partir de ./mobile sobre pkg/client.
+#
+# El .aar (~38 MB, con libgojni.so para 4 ABIs) NO se versiona: es un artefacto
+# de build reproducible. Este script lo regenera. Requisitos:
+#   - Go con gomobile/gobind instalados:
+#       go install golang.org/x/mobile/cmd/gomobile@latest
+#       go install golang.org/x/mobile/cmd/gobind@latest
+#       gomobile init
+#   - Android NDK (este repo usó 26.3.11579264 dentro del Android SDK).
+#
+# En un worktree fuera del árbol del registry, pkg/client importa
+# "fn-registry/functions/cybersecurity" vía el `replace` del go.mod. Si ese
+# replace relativo no resuelve (p. ej. worktree en /tmp), crea un go.work local
+# (gitignored) con: replace fn-registry => /ruta/absoluta/a/fn_registry
+set -euo pipefail
+
+cd "$(dirname "$0")/.."
+
+: "${ANDROID_HOME:=$HOME/android-sdk}"
+: "${ANDROID_NDK_HOME:=$ANDROID_HOME/ndk/26.3.11579264}"
+export ANDROID_HOME ANDROID_NDK_HOME
+export PATH="$HOME/go/bin:$PATH"
+
+OUT="android/app/libs/unibus.aar"
+mkdir -p "$(dirname "$OUT")"
+
+echo "==> gomobile bind -> $OUT"
+gomobile bind \
+  -target=android \
+  -androidapi 21 \
+  -javapkg com.unibus.core \
+  -o "$OUT" \
+  ./mobile
+
+echo "==> OK: $OUT"
+ls -lh "$OUT"

mobile/unibus.go

@@ -22,9 +22,14 @@ import (
 )
 
 // FrameListener receives decrypted messages for a subscribed room. The Android
-// side implements this interface. Its methods are invoked from a NATS delivery
-// goroutine, so implementations must hop back to the UI thread (for example via
-// a coroutine on the main dispatcher) before touching Android views.
+// side implements this interface.
+//
+// IMPORTANT (threading): OnFrame is invoked from a NATS delivery goroutine, NOT
+// the Android main thread. A Kotlin implementation MUST hop back to the UI
+// thread before touching any Compose state or Android view — for example with
+// `withContext(Dispatchers.Main)` from a coroutine, or by posting to a
+// MutableStateFlow that the UI collects. Touching views directly from here
+// crashes with CalledFromWrongThreadException.
 type FrameListener interface {
 	OnFrame(roomID string, sender string, msgID string, text string)
 }
@@ -37,7 +42,8 @@ type Session struct {
 
 // GenerateIdentity creates (or loads) the long-term keypair stored at path.
 // Call it once on first launch. The resulting file holds the peer's private
-// Ed25519 and X25519 keys and must be kept private to the app sandbox.
+// Ed25519 and X25519 keys and must be kept private to the app sandbox
+// (use Context.getFilesDir() on Android).
 func GenerateIdentity(path string) error {
 	_, err := client.LoadOrCreateIdentity(path)
 	return err
@@ -45,7 +51,7 @@ func GenerateIdentity(path string) error {
 
 // NewSession loads the identity at idPath and connects to the bus. natsURL is
 // the data plane (for example tls://host:4250) and ctrlURL is the control plane
-// HTTP endpoint (for example http://host:8470). caPath is the path to the bus
+// HTTP endpoint (for example https://host:8470). caPath is the path to the bus
 // CA certificate (ca.crt) bundled with the app: when set, the session connects
 // securely (TLS pinned to that CA + nkey authentication on the data plane),
 // matching a bus running with auth + TLS. Pass an empty caPath to connect in
@@ -68,9 +74,24 @@ func (s *Session) EndpointID() string {
 	return s.c.Endpoint().ID
 }
 
+// ConnectedServer returns the NATS URL the session is currently connected to,
+// useful for surfacing a "connected to" hint in the UI.
+func (s *Session) ConnectedServer() string {
+	return s.c.ConnectedServer()
+}
+
+// IsConnected reports whether the underlying NATS connection is live.
+func (s *Session) IsConnected() bool {
+	return s.c.IsConnected()
+}
+
 // CreateRoom opens a room on the given subject. mode is "matrix" for the
 // encrypted, persisted and signed policy, or "nats" for plain cleartext. It
 // returns the room id used by Join, Publish and Subscribe.
+//
+// On a secured bus, call RefreshSession after CreateRoom and before
+// Subscribe/Publish so the bus re-derives this peer's per-subject permissions
+// from its new membership (issue 0006e).
 func (s *Session) CreateRoom(subject, mode string) (string, error) {
 	p := room.ModeNATS
 	if mode == "matrix" {
@@ -105,7 +126,7 @@ func (s *Session) Publish(roomID, text string) error {
 }
 
 // Subscribe streams decrypted messages of the room to the listener until the
-// session is closed.
+// session is closed. See FrameListener for the threading contract.
 func (s *Session) Subscribe(roomID string, l FrameListener) error {
 	_, err := s.c.Subscribe(roomID, func(f frame.Frame, plaintext []byte) {
 		l.OnFrame(roomID, f.Sender, f.MsgID, string(plaintext))
@@ -113,6 +134,42 @@ func (s *Session) Subscribe(roomID string, l FrameListener) error {
 	return err
 }
 
+// roomJSON is the flat shape returned by ListRoomsJSON for each room the peer
+// belongs to. It mirrors the fields the UI needs to render a room list item.
+type roomJSON struct {
+	RoomID    string `json:"room_id"`
+	Subject   string `json:"subject"`
+	Epoch     int    `json:"epoch"`
+	Encrypted bool   `json:"encrypted"`
+	Role      string `json:"role"`
+}
+
+// ListRoomsJSON returns the peer's rooms as a JSON array string. gomobile does
+// not bind slices of structs cleanly across the boundary, so the list is
+// marshalled to JSON and the Kotlin side decodes it (kotlinx.serialization).
+// Each element is a roomJSON object.
+func (s *Session) ListRoomsJSON() (string, error) {
+	refs, err := s.c.ListMyRooms()
+	if err != nil {
+		return "", err
+	}
+	out := make([]roomJSON, 0, len(refs))
+	for _, r := range refs {
+		out = append(out, roomJSON{
+			RoomID:    r.RoomID,
+			Subject:   r.Subject,
+			Epoch:     r.Epoch,
+			Encrypted: r.Policy.Encrypt,
+			Role:      r.Role,
+		})
+	}
+	b, err := json.Marshal(out)
+	if err != nil {
+		return "", err
+	}
+	return string(b), nil
+}
+
 // cardJSON is the portable, copy-pasteable public identity a peer shares so a
 // room owner can invite it to an encrypted room. It carries no secret: only the
 // endpoint id and the two public keys (signing + key-exchange), base64-encoded

playground/README.md

@@ -1,119 +0,0 @@
-# unibus playground
-
-An all-in-one, web-based sandbox for the **unibus** message bus. One command
-brings up the entire stack embedded — no NATS to install, no services to wire —
-and a browser UI lets you exercise the bus visually: create peers, create and
-join rooms (cleartext or end-to-end encrypted), invite, publish, watch messages
-arrive live, and kick members (forward secrecy).
-
-This is a **playground** (see `.claude/rules/playgrounds.md`): it lives inside
-the `unibus` app, reuses the parent Go module (no separate `go.mod`), is not
-indexed, and keeps all runtime state under `playground/local_files/` (ephemeral,
-safe to delete).
-
-## Run
-
-From the `unibus` app directory:
-
-```bash
-cd /home/enmanuel/fn_registry/projects/message_bus/apps/unibus
-go run ./playground
-```
-
-Then open **http://localhost:7700** in your browser.
-
-Stop with `Ctrl-C` — the server tears down the web UI, every bus client, the
-control plane, and the embedded NATS cleanly (no orphaned processes).
-
-## Architecture
-
-The browser never speaks NATS. The Go server is the actual bus peer:
-
-```
-browser ──fetch/SSE──▶ playground server (:7700)
-                            │  holds one unibus client per named peer
-                            ├──HTTP──▶ membership control plane (127.0.0.1:8480)
-                            └──NATS──▶ embedded NATS + JetStream (:4260)
-```
-
-- **:7700** — web UI (the only browser-facing port).
-- **127.0.0.1:8480** — membership control plane (rooms, members, sealed keys,
-  rekey, blobs). Internal only.
-- **:4260** — embedded NATS + JetStream (the data plane). Internal only.
-
-Each named peer gets its own long-term identity, persisted to
-`playground/local_files/<name>.id`, so a peer keeps the same endpoint across
-restarts. When a peer creates or joins a room, the server subscribes on its
-behalf and streams every received frame to that peer's open browser tabs over
-Server-Sent Events.
-
-The playground only orchestrates the public unibus client API
-(`CreateRoom`, `Join`, `Subscribe`, `Publish`, `Invite`, `Kick`); it never
-reimplements bus or crypto logic.
-
-## Try it: 2 peers + encryption + kick
-
-1. Open **two browser tabs** on http://localhost:7700.
-2. Tab A: type `alice`, click **Connect**.
-3. Tab B: type `bob`, click **Connect**.
-4. Tab A (alice): type a subject like `room.general`, tick **🔒 encrypted
-   (E2E)**, click **Create room**. Copy the resulting `room_id`.
-5. Tab A (alice): in the Action panel, pick `bob` as the target peer (use the
-   ↻ button to refresh the peer list if needed) and click **Invite to this
-   room**.
-6. Tab B (bob): paste the `room_id` into the join field and click **Join**.
-7. Type messages in **both** tabs and hit Send — each message appears live in
-   both tabs, tagged with subject, sender, time, and 🔒 (encrypted) or `clear`.
-8. Tab A (alice): click **Kick from this room** with `bob` selected. The room
-   key rotates to a new epoch. New messages alice sends are no longer visible to
-   bob — **forward secrecy**: bob no longer holds the current key.
-
-Cleartext rooms (leave the checkbox unticked) behave like plain NATS fan-out:
-fast, ephemeral, unsigned. Encrypted rooms are the Matrix-like mode: E2E
-encrypted, persisted, and per-message signed.
-
-## Benchmark: throughput simulator
-
-The bottom panel of the UI is a performance simulator. Press **▶ Ejecutar
-benchmark** and one publisher floods a fresh room with thousands of messages
-that N subscribers receive (fan-out); a live canvas chart animates the sent vs
-received totals while it runs.
-
-The two policy axes are exposed as **independent flags**, so the benchmark
-measures the cost of each layer in isolation:
-
-| JetStream | Encryption | Room policy | What it costs |
-|---|---|---|---|
-| off | off | `{Encrypt:false, Persist:false}` | plain core NATS fan-out |
-| **on** | off | `{Encrypt:false, Persist:true}` | durable JetStream (publish ack per message) |
-| off | **on** | `{Encrypt:true, Persist:false}` | AEAD + Ed25519 signature per message, core transport |
-| **on** | **on** | `{Encrypt:true, Persist:true}` | full E2E + durable history |
-
-A **payload size** slider (16 B – 8 KiB) sets the message size. Encrypted or
-persistent runs are capped to 30 000 messages (each message pays per-message
-crypto and/or a JetStream ack, so they run much slower than plain NATS).
-
-The benchmark uses its own ephemeral peers (fresh identities, never persisted),
-so it never touches the named peers of the manual sandbox.
-
-It is driven by an SSE endpoint that streams progress samples:
-
-```bash
-curl -N "http://localhost:7700/api/bench?n_msgs=20000&n_subs=3&payload=128&encrypt=0&persist=0"
-# emits: data: {"type":"start",...}  data: {"type":"sample",...}  data: {"type":"done",...}
-```
-
-Query params: `n_msgs`, `n_subs` (1–16), `payload` (bytes), `encrypt` (0/1),
-`persist` (0/1).
-
-## State / cleanup
-
-All writable state lives under `playground/local_files/`:
-
-- `<name>.id` — per-peer identity (private keys; treat like an SSH key).
-- `play.db` — membership store (rooms, members, sealed keys).
-- `blobs/` — media blob store.
-- `js/` — embedded JetStream store.
-
-Delete the whole `playground/local_files/` directory to reset to a clean slate.
-It is gitignored and never distributed.

playground/index.html

@@ -1,594 +0,0 @@
-<!doctype html>
-<html lang="en">
-<head>
-<meta charset="utf-8" />
-<meta name="viewport" content="width=device-width, initial-scale=1" />
-<title>unibus playground</title>
-<style>
-  :root {
-    --bg: #0d1117;
-    --panel: #161b22;
-    --panel2: #1c2230;
-    --border: #2b333f;
-    --fg: #e6edf3;
-    --muted: #8b98a5;
-    --accent: #2f81f7;
-    --green: #3fb950;
-    --gold: #d29922;
-    --red: #f85149;
-    --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
-  }
-  * { box-sizing: border-box; }
-  body {
-    margin: 0;
-    background: var(--bg);
-    color: var(--fg);
-    font-family: var(--mono);
-    font-size: 14px;
-    line-height: 1.5;
-  }
-  header {
-    padding: 14px 20px;
-    border-bottom: 1px solid var(--border);
-    display: flex;
-    align-items: baseline;
-    gap: 12px;
-  }
-  header h1 { margin: 0; font-size: 18px; letter-spacing: 0.5px; }
-  header .sub { color: var(--muted); font-size: 12px; }
-  .wrap {
-    display: grid;
-    grid-template-columns: 360px 1fr;
-    gap: 16px;
-    padding: 16px 20px;
-    max-width: 1200px;
-  }
-  .col { display: flex; flex-direction: column; gap: 14px; }
-  .card {
-    background: var(--panel);
-    border: 1px solid var(--border);
-    border-radius: 8px;
-    padding: 14px;
-  }
-  .card h2 {
-    margin: 0 0 10px;
-    font-size: 13px;
-    text-transform: uppercase;
-    letter-spacing: 1px;
-    color: var(--muted);
-  }
-  label { display: block; font-size: 12px; color: var(--muted); margin: 8px 0 3px; }
-  input[type=text], select {
-    width: 100%;
-    background: var(--panel2);
-    border: 1px solid var(--border);
-    color: var(--fg);
-    padding: 7px 9px;
-    border-radius: 6px;
-    font-family: var(--mono);
-    font-size: 13px;
-  }
-  input:focus, select:focus { outline: none; border-color: var(--accent); }
-  .row { display: flex; gap: 8px; align-items: center; }
-  .row > * { flex: 1; }
-  .checkrow { display: flex; align-items: center; gap: 6px; margin: 10px 0; }
-  .checkrow input { flex: 0 0 auto; width: auto; }
-  .checkrow label { margin: 0; flex: 0 0 auto; }
-  button {
-    background: var(--accent);
-    border: none;
-    color: #fff;
-    padding: 7px 12px;
-    border-radius: 6px;
-    cursor: pointer;
-    font-family: var(--mono);
-    font-size: 13px;
-    margin-top: 8px;
-  }
-  button:hover { filter: brightness(1.12); }
-  button.ghost { background: var(--panel2); border: 1px solid var(--border); color: var(--fg); }
-  button.danger { background: #3a1d1d; border: 1px solid var(--red); color: var(--red); }
-  button:disabled { opacity: 0.4; cursor: not-allowed; }
-  .pill {
-    display: inline-block;
-    background: var(--panel2);
-    border: 1px solid var(--border);
-    border-radius: 12px;
-    padding: 2px 9px;
-    font-size: 11px;
-    color: var(--muted);
-  }
-  .pill.on { color: var(--green); border-color: var(--green); }
-  .ident { word-break: break-all; font-size: 11px; color: var(--gold); margin-top: 6px; }
-  .copy {
-    cursor: pointer; color: var(--accent); font-size: 11px;
-    margin-left: 6px; text-decoration: underline;
-  }
-  #log {
-    background: #08090c;
-    border: 1px solid var(--border);
-    border-radius: 8px;
-    padding: 10px 12px;
-    height: 520px;
-    overflow-y: auto;
-    font-size: 12.5px;
-    white-space: pre-wrap;
-  }
-  .msg { padding: 2px 0; border-bottom: 1px solid #11151b; }
-  .msg .subj { color: var(--accent); }
-  .msg .from { color: var(--gold); }
-  .msg .meta { color: var(--muted); font-size: 11px; }
-  .msg .enc { color: var(--green); }
-  .msg .clear { color: var(--muted); }
-  .sys { color: var(--muted); font-style: italic; }
-  .err { color: var(--red); }
-  .help {
-    background: var(--panel2);
-    border-left: 3px solid var(--accent);
-    padding: 10px 12px;
-    border-radius: 4px;
-    font-size: 12px;
-    color: var(--muted);
-    line-height: 1.6;
-  }
-  .help b { color: var(--fg); }
-  .help code { color: var(--gold); }
-  .status { font-size: 11px; color: var(--muted); margin-top: 6px; min-height: 14px; }
-  .status.ok { color: var(--green); }
-  .status.bad { color: var(--red); }
-</style>
-</head>
-<body>
-<header>
-  <h1>unibus playground</h1>
-  <span class="sub">embedded NATS + JetStream &middot; E2E rooms &middot; forward secrecy &middot; SSE</span>
-</header>
-
-<div class="wrap">
-  <!-- LEFT COLUMN: controls -->
-  <div class="col">
-    <div class="card">
-      <h2>1 &middot; Identity</h2>
-      <label>Peer name</label>
-      <div class="row">
-        <input id="peerName" type="text" placeholder="alice" autocomplete="off" />
-        <button id="connectBtn" style="flex:0 0 auto">Connect</button>
-      </div>
-      <div id="peerIdent" class="ident"></div>
-      <div id="connStatus" class="status"></div>
-    </div>
-
-    <div class="card">
-      <h2>2 &middot; Rooms</h2>
-      <label>Subject (e.g. room.general)</label>
-      <input id="roomSubject" type="text" placeholder="room.general" autocomplete="off" />
-      <div class="checkrow">
-        <input id="roomEncrypt" type="checkbox" />
-        <label for="roomEncrypt">&#128274; encrypted (E2E)</label>
-      </div>
-      <div class="checkrow">
-        <input id="roomPersist" type="checkbox" />
-        <label for="roomPersist">&#128450; persistente (historial)</label>
-      </div>
-      <div class="help" style="margin:-4px 0 8px; font-size:12px; color:var(--muted)">
-        persistente = quien se une despues ve el historial; sin persistir = solo mensajes nuevos (NATS simple).
-      </div>
-      <button id="createRoomBtn" disabled>Create room</button>
-      <div style="border-top:1px solid var(--border); margin:12px 0"></div>
-      <label>Join by room_id</label>
-      <input id="joinRoomId" type="text" placeholder="01J..." autocomplete="off" />
-      <button id="joinBtn" class="ghost" disabled>Join</button>
-      <div id="roomStatus" class="status"></div>
-    </div>
-
-    <div class="card">
-      <h2>3 &middot; Action</h2>
-      <label>Active room</label>
-      <select id="activeRoom"></select>
-      <label>Message</label>
-      <div class="row">
-        <input id="msgText" type="text" placeholder="hello bus" autocomplete="off" />
-        <button id="sendBtn" style="flex:0 0 auto" disabled>Send</button>
-      </div>
-      <div style="border-top:1px solid var(--border); margin:12px 0"></div>
-      <label>Target peer</label>
-      <div class="row">
-        <select id="targetPeer"></select>
-        <button id="refreshPeersBtn" class="ghost" style="flex:0 0 auto" title="reload peer list">&#8635;</button>
-      </div>
-      <button id="inviteBtn" disabled>Invite to this room</button>
-      <button id="kickBtn" class="danger" disabled>Kick from this room</button>
-      <div id="actionStatus" class="status"></div>
-    </div>
-  </div>
-
-  <!-- RIGHT COLUMN: live messages + help -->
-  <div class="col">
-    <div class="card" style="padding-bottom:8px">
-      <h2>Live messages <span id="streamPill" class="pill">disconnected</span></h2>
-      <div id="log"></div>
-    </div>
-    <div class="help">
-      <b>&#9432; How to try it</b><br />
-      Open <b>2 tabs</b>. Connect as <code>alice</code> in one and <code>bob</code> in the other.
-      In alice: create a <code>&#128274; encrypted</code> room, copy the <code>room_id</code>,
-      then pick <code>bob</code> as target and <b>Invite to this room</b>.
-      In bob: paste that <code>room_id</code> and <b>Join</b>.
-      Type in both &rarr; messages appear live on each side.
-      In alice: <b>Kick</b> bob &rarr; bob stops seeing new messages (forward secrecy: the room
-      key rotates and bob no longer holds it).
-    </div>
-  </div>
-</div>
-
-<!-- BENCHMARK: full-width performance simulator -->
-<div style="padding: 0 20px 32px; max-width: 1200px;">
-  <div class="card">
-    <h2>Benchmark de rendimiento &middot; 1 publisher &rarr; N subscribers</h2>
-    <div style="display:flex; gap:26px; flex-wrap:wrap; align-items:flex-end; margin-bottom:6px;">
-      <div style="min-width:230px;">
-        <label>Mensajes a publicar &middot; <span id="bMsgsVal" style="color:var(--fg)">20 000</span></label>
-        <input id="bMsgs" type="range" min="1000" max="200000" step="1000" value="20000" style="width:100%; accent-color:var(--accent);" />
-      </div>
-      <div style="min-width:160px;">
-        <label>Subscribers &middot; <span id="bSubsVal" style="color:var(--fg)">3</span></label>
-        <input id="bSubs" type="range" min="1" max="16" step="1" value="3" style="width:100%; accent-color:var(--accent);" />
-      </div>
-      <div style="min-width:200px;">
-        <label>Tamaño payload &middot; <span id="bPayVal" style="color:var(--fg)">128 B</span></label>
-        <input id="bPay" type="range" min="16" max="8192" step="16" value="128" style="width:100%; accent-color:var(--accent);" />
-      </div>
-      <div class="checkrow" style="margin:0;">
-        <input id="bPersist" type="checkbox" />
-        <label for="bPersist">&#128450; JetStream (persistente)</label>
-      </div>
-      <div class="checkrow" style="margin:0;">
-        <input id="bEncrypt" type="checkbox" />
-        <label for="bEncrypt">&#128274; Encriptación E2E</label>
-      </div>
-      <button id="bRun" style="margin:0;">&#9654; Ejecutar benchmark</button>
-    </div>
-    <div class="help" style="margin:6px 0 12px;">
-      <b>JetStream</b> y <b>Encriptación</b> son ejes independientes: NATS core (ambos off) &middot; JetStream durable &middot; E2E (AEAD + firma Ed25519 por mensaje) &middot; E2E + JetStream. Los modos con cripto o persistencia se limitan a 30&nbsp;000 mensajes (cada mensaje paga cifrado/firma/ack).
-    </div>
-    <div style="display:flex; gap:30px; flex-wrap:wrap; margin:4px 2px 8px;">
-      <div><div style="font-size:11px; color:var(--muted); text-transform:uppercase; letter-spacing:.05em;">Enviados</div><div id="bSent" style="font-size:22px; color:var(--accent);">0</div></div>
-      <div><div style="font-size:11px; color:var(--muted); text-transform:uppercase; letter-spacing:.05em;">Recibidos (&Sigma; subs)</div><div id="bRecv" style="font-size:22px; color:var(--green);">0</div></div>
-      <div><div style="font-size:11px; color:var(--muted); text-transform:uppercase; letter-spacing:.05em;">Throughput recv</div><div id="bTps" style="font-size:22px; color:var(--gold);">0</div></div>
-      <div><div style="font-size:11px; color:var(--muted); text-transform:uppercase; letter-spacing:.05em;">Tiempo</div><div id="bTime" style="font-size:22px;">0.00 s</div></div>
-    </div>
-    <canvas id="bChart" style="width:100%; height:300px; display:block; background:#08090c; border:1px solid var(--border); border-radius:8px;"></canvas>
-    <div style="display:flex; gap:18px; font-size:12px; color:var(--muted); margin-top:6px;">
-      <span><span style="display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--accent);margin-right:6px;"></span>enviados (publisher)</span>
-      <span><span style="display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--green);margin-right:6px;"></span>recibidos (suma de subscribers)</span>
-    </div>
-    <div id="bStatus" class="status" style="margin-top:8px;"></div>
-  </div>
-</div>
-
-<script>
-"use strict";
-
-const state = {
-  peer: null,          // connected peer name
-  rooms: {},           // room_id -> {subject, encrypt}
-  es: null,            // EventSource
-};
-
-const $ = (id) => document.getElementById(id);
-
-async function api(path, body) {
-  const opts = { method: "POST", headers: { "Content-Type": "application/json" } };
-  if (body !== undefined) opts.body = JSON.stringify(body);
-  const res = await fetch(path, opts);
-  const data = await res.json().catch(() => ({}));
-  if (!res.ok) throw new Error(data.error || ("HTTP " + res.status));
-  return data;
-}
-async function apiGet(path) {
-  const res = await fetch(path);
-  const data = await res.json().catch(() => ({}));
-  if (!res.ok) throw new Error(data.error || ("HTTP " + res.status));
-  return data;
-}
-
-function setStatus(id, msg, kind) {
-  const el = $(id);
-  el.textContent = msg || "";
-  el.className = "status" + (kind ? " " + kind : "");
-}
-
-function short(s, n = 10) {
-  if (!s) return "";
-  return s.length <= n * 2 ? s : s.slice(0, n) + "…" + s.slice(-4);
-}
-
-function hhmmss(ms) {
-  const d = new Date(ms);
-  const p = (x) => String(x).padStart(2, "0");
-  return p(d.getHours()) + ":" + p(d.getMinutes()) + ":" + p(d.getSeconds());
-}
-
-function logSys(text, cls) {
-  const log = $("log");
-  const div = document.createElement("div");
-  div.className = "msg " + (cls || "sys");
-  div.textContent = text;
-  log.appendChild(div);
-  log.scrollTop = log.scrollHeight;
-}
-
-function logMsg(ev) {
-  const log = $("log");
-  const div = document.createElement("div");
-  div.className = "msg";
-  const enc = ev.encrypted
-    ? '<span class="enc">&#128274;</span>'
-    : '<span class="clear">clear</span>';
-  div.innerHTML =
-    '<span class="subj">[' + escapeHtml(ev.subject) + ']</span> ' +
-    '<span class="from">' + escapeHtml(short(ev.sender)) + '</span> &#8614; ' +
-    escapeHtml(ev.text) +
-    ' <span class="meta">&middot; ' + hhmmss(ev.ts) + ' &middot; ' + enc + '</span>';
-  log.appendChild(div);
-  log.scrollTop = log.scrollHeight;
-}
-
-function escapeHtml(s) {
-  return String(s).replace(/[&<>"']/g, (c) => ({
-    "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#39;",
-  }[c]));
-}
-
-function refreshRoomSelect() {
-  const sel = $("activeRoom");
-  const cur = sel.value;
-  sel.innerHTML = "";
-  for (const [id, info] of Object.entries(state.rooms)) {
-    const opt = document.createElement("option");
-    opt.value = id;
-    opt.textContent = info.subject + " (" + short(id, 6) + ")" + (info.encrypt ? " 🔒" : "");
-    sel.appendChild(opt);
-  }
-  if (state.rooms[cur]) sel.value = cur;
-  const has = Object.keys(state.rooms).length > 0;
-  $("sendBtn").disabled = !has;
-  $("inviteBtn").disabled = !has;
-  $("kickBtn").disabled = !has;
-}
-
-async function refreshPeers() {
-  try {
-    const peers = await apiGet("/api/peers");
-    const sel = $("targetPeer");
-    const cur = sel.value;
-    sel.innerHTML = "";
-    for (const p of peers) {
-      if (p.name === state.peer) continue; // don't target yourself
-      const opt = document.createElement("option");
-      opt.value = p.name;
-      opt.textContent = p.name + " (" + short(p.endpoint_id, 6) + ")";
-      sel.appendChild(opt);
-    }
-    if ([...sel.options].some((o) => o.value === cur)) sel.value = cur;
-  } catch (e) {
-    setStatus("actionStatus", "peers: " + e.message, "bad");
-  }
-}
-
-function openStream(name) {
-  if (state.es) state.es.close();
-  const es = new EventSource("/api/stream?peer=" + encodeURIComponent(name));
-  es.onopen = () => {
-    $("streamPill").textContent = "live: " + name;
-    $("streamPill").className = "pill on";
-  };
-  es.onmessage = (e) => {
-    try { logMsg(JSON.parse(e.data)); } catch (_) {}
-  };
-  es.onerror = () => {
-    $("streamPill").textContent = "reconnecting…";
-    $("streamPill").className = "pill";
-  };
-  state.es = es;
-}
-
-// ---- handlers ----
-
-$("connectBtn").onclick = async () => {
-  const name = $("peerName").value.trim();
-  if (!name) { setStatus("connStatus", "enter a name", "bad"); return; }
-  try {
-    const res = await api("/api/peer", { name });
-    state.peer = res.name;
-    state.rooms = {};
-    refreshRoomSelect();
-    $("peerIdent").innerHTML =
-      'endpoint: ' + escapeHtml(res.endpoint_id) +
-      ' <span class="copy" id="copyId">copy</span>';
-    $("copyId").onclick = () => navigator.clipboard.writeText(res.endpoint_id);
-    setStatus("connStatus", "connected as " + res.name, "ok");
-    $("createRoomBtn").disabled = false;
-    $("joinBtn").disabled = false;
-    $("log").innerHTML = "";
-    logSys("connected as " + res.name + " — listening for messages");
-    openStream(res.name);
-    refreshPeers();
-  } catch (e) {
-    setStatus("connStatus", e.message, "bad");
-  }
-};
-
-$("createRoomBtn").onclick = async () => {
-  const subject = $("roomSubject").value.trim();
-  const encrypt = $("roomEncrypt").checked;
-  const persist = $("roomPersist").checked;
-  if (!subject) { setStatus("roomStatus", "subject required", "bad"); return; }
-  try {
-    const res = await api("/api/room", { peer: state.peer, subject, encrypt, persist });
-    state.rooms[res.room_id] = { subject: res.subject, encrypt: res.encrypt };
-    refreshRoomSelect();
-    $("activeRoom").value = res.room_id;
-    setStatus("roomStatus", "created " + res.room_id + " (click to copy)", "ok");
-    $("roomStatus").style.cursor = "pointer";
-    $("roomStatus").onclick = () => navigator.clipboard.writeText(res.room_id);
-    logSys("created room " + res.subject + " [" + short(res.room_id) + "]" + (encrypt ? " 🔒" : "") + (res.persist ? " 🗄" : ""));
-  } catch (e) {
-    setStatus("roomStatus", e.message, "bad");
-  }
-};
-
-$("joinBtn").onclick = async () => {
-  const roomId = $("joinRoomId").value.trim();
-  if (!roomId) { setStatus("roomStatus", "room_id required", "bad"); return; }
-  try {
-    const res = await api("/api/join", { peer: state.peer, room_id: roomId });
-    state.rooms[roomId] = { subject: res.subject, encrypt: res.encrypt };
-    refreshRoomSelect();
-    $("activeRoom").value = roomId;
-    setStatus("roomStatus", "joined " + res.subject + (res.encrypt ? " 🔒" : ""), "ok");
-    logSys("joined room " + res.subject + " [" + short(roomId) + "]");
-  } catch (e) {
-    setStatus("roomStatus", e.message, "bad");
-  }
-};
-
-$("sendBtn").onclick = async () => {
-  const roomId = $("activeRoom").value;
-  const text = $("msgText").value;
-  if (!roomId) { setStatus("actionStatus", "select a room", "bad"); return; }
-  try {
-    await api("/api/publish", { peer: state.peer, room_id: roomId, text });
-    $("msgText").value = "";
-    setStatus("actionStatus", "sent", "ok");
-  } catch (e) {
-    setStatus("actionStatus", e.message, "bad");
-  }
-};
-$("msgText").addEventListener("keydown", (e) => { if (e.key === "Enter") $("sendBtn").click(); });
-
-$("inviteBtn").onclick = async () => {
-  const roomId = $("activeRoom").value;
-  const target = $("targetPeer").value;
-  if (!roomId) { setStatus("actionStatus", "select a room", "bad"); return; }
-  if (!target) { setStatus("actionStatus", "no target peer (connect another peer first)", "bad"); return; }
-  try {
-    await api("/api/invite", { peer: state.peer, room_id: roomId, target });
-    setStatus("actionStatus", "invited " + target, "ok");
-    logSys("invited " + target + " to " + short(roomId));
-  } catch (e) {
-    setStatus("actionStatus", e.message, "bad");
-  }
-};
-
-$("kickBtn").onclick = async () => {
-  const roomId = $("activeRoom").value;
-  const target = $("targetPeer").value;
-  if (!roomId) { setStatus("actionStatus", "select a room", "bad"); return; }
-  if (!target) { setStatus("actionStatus", "no target peer", "bad"); return; }
-  try {
-    await api("/api/kick", { peer: state.peer, room_id: roomId, target });
-    setStatus("actionStatus", "kicked " + target + " (key rotated)", "ok");
-    logSys("kicked " + target + " from " + short(roomId) + " — key rotated (forward secrecy)");
-  } catch (e) {
-    setStatus("actionStatus", e.message, "bad");
-  }
-};
-
-$("refreshPeersBtn").onclick = refreshPeers;
-$("peerName").addEventListener("keydown", (e) => { if (e.key === "Enter") $("connectBtn").click(); });
-
-// ---- benchmark ----
-const fmtN = (n) => Number(n).toLocaleString("es-ES");
-const bMsgs = $("bMsgs"), bSubs = $("bSubs"), bPay = $("bPay");
-bMsgs.oninput = () => $("bMsgsVal").textContent = fmtN(+bMsgs.value);
-bSubs.oninput = () => $("bSubsVal").textContent = bSubs.value;
-bPay.oninput  = () => $("bPayVal").textContent = fmtN(+bPay.value) + " B";
-
-let bSamples = [], bRunning = false, bES = null;
-const bCanvas = $("bChart"), bCtx = bCanvas.getContext("2d");
-function cssVar(n) { return getComputedStyle(document.documentElement).getPropertyValue(n).trim(); }
-
-function bResize() {
-  const dpr = window.devicePixelRatio || 1, r = bCanvas.getBoundingClientRect();
-  bCanvas.width = r.width * dpr; bCanvas.height = r.height * dpr;
-  bCtx.setTransform(dpr, 0, 0, dpr, 0, 0); bDraw();
-}
-window.addEventListener("resize", bResize);
-
-function bDraw() {
-  const r = bCanvas.getBoundingClientRect(), W = r.width, H = r.height;
-  const padL = 70, padR = 14, padT = 12, padB = 26;
-  bCtx.clearRect(0, 0, W, H);
-  const tMax = bSamples.length ? Math.max(bSamples[bSamples.length - 1].t, 0.001) : 1;
-  const yMax = bSamples.length ? Math.max(...bSamples.map(s => Math.max(s.sent, s.recv)), 1) : 1;
-  bCtx.strokeStyle = "#2b333f"; bCtx.fillStyle = "#8b98a5"; bCtx.font = "11px ui-monospace";
-  for (let i = 0; i <= 5; i++) {
-    const yy = (H - padB) - (i / 5) * (H - padT - padB);
-    bCtx.beginPath(); bCtx.moveTo(padL, yy); bCtx.lineTo(W - padR, yy); bCtx.stroke();
-    bCtx.textAlign = "right"; bCtx.fillText(fmtN(Math.round((i / 5) * yMax)), padL - 8, yy + 3);
-  }
-  bCtx.textAlign = "center";
-  bCtx.fillText("0 s", padL, H - padB + 15);
-  bCtx.fillText(tMax.toFixed(2) + " s", W - padR, H - padB + 15);
-  if (bSamples.length < 2) return;
-  const x = (t) => padL + (t / tMax) * (W - padL - padR);
-  const y = (v) => (H - padB) - (v / yMax) * (H - padT - padB);
-  const line = (key, color) => {
-    bCtx.beginPath(); bCtx.lineWidth = 2.2; bCtx.strokeStyle = color;
-    bSamples.forEach((s, i) => { const px = x(s.t), py = y(s[key]); i ? bCtx.lineTo(px, py) : bCtx.moveTo(px, py); });
-    bCtx.stroke();
-  };
-  line("sent", cssVar("--accent"));
-  line("recv", cssVar("--green"));
-}
-
-function bSetRunning(v) { bRunning = v; $("bRun").disabled = v; }
-
-$("bRun").onclick = () => {
-  if (bRunning) return;
-  bSamples = []; bSetRunning(true);
-  $("bSent").textContent = "0"; $("bRecv").textContent = "0"; $("bTps").textContent = "0"; $("bTime").textContent = "0.00 s";
-  setStatus("bStatus", "conectando…");
-  const qs = new URLSearchParams({
-    n_msgs: bMsgs.value, n_subs: bSubs.value, payload: bPay.value,
-    encrypt: $("bEncrypt").checked ? "1" : "0", persist: $("bPersist").checked ? "1" : "0",
-  });
-  const es = new EventSource("/api/bench?" + qs.toString());
-  bES = es;
-  const finish = () => { try { es.close(); } catch (_) {} bSetRunning(false); };
-  es.addEventListener("end", finish);
-  es.onmessage = (e) => {
-    let m; try { m = JSON.parse(e.data); } catch (_) { return; }
-    if (m.type === "start") {
-      setStatus("bStatus",
-        "corriendo… " + fmtN(m.n_msgs) + " msgs → " + m.n_subs + " subs · payload " + fmtN(m.payload) + "B"
-        + (m.encrypt ? " · \u{1F512} E2E" : "") + (m.persist ? " · \u{1F5C4} JetStream" : "")
-        + (m.capped ? " · (limitado a 30k)" : ""), "");
-    } else if (m.type === "sample") {
-      bSamples.push({ t: m.t, sent: m.sent, recv: m.recv });
-      $("bSent").textContent = fmtN(m.sent); $("bRecv").textContent = fmtN(m.recv); $("bTime").textContent = m.t.toFixed(2) + " s";
-      if (bSamples.length >= 2) {
-        const a = bSamples[bSamples.length - 2], b = bSamples[bSamples.length - 1], dt = b.t - a.t;
-        if (dt > 0) $("bTps").textContent = fmtN(Math.round((b.recv - a.recv) / dt));
-      }
-      bDraw();
-    } else if (m.type === "done") {
-      bSamples.push({ t: m.t, sent: m.sent, recv: m.recv });
-      $("bSent").textContent = fmtN(m.sent); $("bRecv").textContent = fmtN(m.recv);
-      $("bTps").textContent = fmtN(m.recv_tps); $("bTime").textContent = m.t.toFixed(2) + " s";
-      setStatus("bStatus",
-        "✓ " + m.t.toFixed(2) + "s · pub " + fmtN(m.pub_tps) + "/s · recv " + fmtN(m.recv_tps) + "/s · fan-out ×"
-        + m.n_subs + " · por sub [" + (m.per_sub || []).map(fmtN).join(", ") + "]", "ok");
-      bDraw(); finish();
-    } else if (m.type === "error") {
-      setStatus("bStatus", "error: " + m.msg, "bad"); finish();
-    }
-  };
-  es.onerror = () => { if (bRunning) { setStatus("bStatus", "conexión SSE perdida", "bad"); finish(); } };
-};
-
-bResize();
-</script>
-</body>
-</html>

playground/server.go

@@ -1,933 +0,0 @@
-// Command playground is an all-in-one, web-based sandbox for the unibus message
-// bus. A single `go run ./playground` launches the entire stack embedded:
-//
-//   - an embedded NATS server with JetStream (the data plane),
-//   - the membership control plane (rooms, members, sealed keys, rekey) over an
-//     internal HTTP server,
-//   - the media blob store, and
-//   - a browser-facing web UI on :7700.
-//
-// The browser never speaks NATS. The Go server is the actual bus peer: it holds
-// one unibus client per named peer, subscribes to rooms on the peer's behalf,
-// and streams received messages to the browser over Server-Sent Events. The
-// browser drives everything with plain fetch() + EventSource() — no build step,
-// no JS framework, no external libraries.
-//
-// This is a playground (see .claude/rules/playgrounds.md): it lives inside the
-// unibus app, reuses the parent module (no new go.mod), is not indexed, and
-// stores ephemeral state under playground/local_files/.
-package main
-
-import (
-	"bytes"
-	"context"
-	"encoding/json"
-	"errors"
-	"fmt"
-	"io"
-	"log"
-	"net/http"
-	"os"
-	"os/signal"
-	"path/filepath"
-	"strconv"
-	"sync"
-	"sync/atomic"
-	"syscall"
-	"time"
-
-	_ "embed"
-
-	cs "fn-registry/functions/cybersecurity"
-	"github.com/enmanuel/unibus/pkg/blobstore"
-	"github.com/enmanuel/unibus/pkg/client"
-	"github.com/enmanuel/unibus/pkg/embeddednats"
-	"github.com/enmanuel/unibus/pkg/frame"
-	"github.com/enmanuel/unibus/pkg/membership"
-	"github.com/enmanuel/unibus/pkg/room"
-)
-
-// Fixed ports (verified free before assignment — do not change without reason).
-const (
-	webAddr   = "127.0.0.1:7700" // browser-facing web UI
-	ctrlAddr  = "127.0.0.1:8480" // internal membership control plane
-	ctrlURL   = "http://" + ctrlAddr
-	natsPort  = 4260 // internal embedded NATS
-	natsURL   = "nats://127.0.0.1:4260"
-	localFiles = "playground/local_files"
-)
-
-//go:embed index.html
-var indexHTML []byte
-
-// ---------------------------------------------------------------------------
-// Event: a message received by a peer on one of its subscribed rooms. Fanned
-// out to every SSE listener attached to that peer.
-// ---------------------------------------------------------------------------
-
-type Event struct {
-	RoomID    string `json:"room_id"`
-	Subject   string `json:"subject"`
-	Sender    string `json:"sender"`
-	Text      string `json:"text"`
-	Encrypted bool   `json:"encrypted"`
-	TS        int64  `json:"ts"` // unix millis
-}
-
-// roomInfo caches the per-room metadata a peer needs to label incoming frames.
-type roomInfo struct {
-	subject string
-	encrypt bool
-}
-
-// peerState holds everything about one named peer: its bus client, its public
-// endpoint, its live subscriptions, the rooms it knows, and the set of SSE
-// listener channels currently attached to it.
-type peerState struct {
-	name     string
-	client   *client.Client
-	endpoint client.Endpoint
-
-	mu        sync.Mutex
-	subs      map[string]*client.Sub  // roomID -> subscription
-	rooms     map[string]roomInfo     // roomID -> subject/encrypt
-	listeners map[chan Event]struct{} // attached SSE channels
-}
-
-// emit fans an event out to all attached listeners without blocking on a slow
-// or disconnected consumer.
-func (p *peerState) emit(ev Event) {
-	p.mu.Lock()
-	defer p.mu.Unlock()
-	for ch := range p.listeners {
-		select {
-		case ch <- ev:
-		default: // listener buffer full: drop rather than block the NATS callback
-		}
-	}
-}
-
-func (p *peerState) addListener(ch chan Event) {
-	p.mu.Lock()
-	p.listeners[ch] = struct{}{}
-	p.mu.Unlock()
-}
-
-func (p *peerState) removeListener(ch chan Event) {
-	p.mu.Lock()
-	delete(p.listeners, ch)
-	p.mu.Unlock()
-}
-
-func (p *peerState) setRoom(roomID string, info roomInfo) {
-	p.mu.Lock()
-	p.rooms[roomID] = info
-	p.mu.Unlock()
-}
-
-// roomList returns a snapshot of the rooms this peer knows (created or joined),
-// so the SPA can render the peer's room list without re-deriving it client-side.
-func (p *peerState) roomList() []map[string]any {
-	p.mu.Lock()
-	defer p.mu.Unlock()
-	out := make([]map[string]any, 0, len(p.rooms))
-	for id, info := range p.rooms {
-		out = append(out, map[string]any{
-			"room_id": id,
-			"subject": info.subject,
-			"encrypt": info.encrypt,
-		})
-	}
-	return out
-}
-
-// ---------------------------------------------------------------------------
-// Hub: the registry of peers, protected by a single mutex.
-// ---------------------------------------------------------------------------
-
-type Hub struct {
-	mu    sync.Mutex
-	peers map[string]*peerState
-}
-
-func newHub() *Hub { return &Hub{peers: map[string]*peerState{}} }
-
-// getOrCreate returns the peer for name, creating its identity + bus client on
-// first use. Identities persist to playground/local_files/<name>.id so a peer
-// keeps the same endpoint across restarts.
-func (h *Hub) getOrCreate(name string) (*peerState, error) {
-	h.mu.Lock()
-	defer h.mu.Unlock()
-	if p, ok := h.peers[name]; ok {
-		return p, nil
-	}
-	idPath := filepath.Join(localFiles, name+".id")
-	id, err := client.LoadOrCreateIdentity(idPath)
-	if err != nil {
-		return nil, fmt.Errorf("identity for %q: %w", name, err)
-	}
-	c, err := client.New(natsURL, ctrlURL, id)
-	if err != nil {
-		return nil, fmt.Errorf("client for %q: %w", name, err)
-	}
-	p := &peerState{
-		name:      name,
-		client:    c,
-		endpoint:  c.Endpoint(),
-		subs:      map[string]*client.Sub{},
-		rooms:     map[string]roomInfo{},
-		listeners: map[chan Event]struct{}{},
-	}
-	h.peers[name] = p
-	return p, nil
-}
-
-// lookup returns an already-created peer or false.
-func (h *Hub) lookup(name string) (*peerState, bool) {
-	h.mu.Lock()
-	defer h.mu.Unlock()
-	p, ok := h.peers[name]
-	return p, ok
-}
-
-// list returns a snapshot of all peers (name + endpoint id).
-func (h *Hub) list() []map[string]string {
-	h.mu.Lock()
-	defer h.mu.Unlock()
-	out := make([]map[string]string, 0, len(h.peers))
-	for name, p := range h.peers {
-		out = append(out, map[string]string{"name": name, "endpoint_id": p.endpoint.ID})
-	}
-	return out
-}
-
-func (h *Hub) closeAll() {
-	h.mu.Lock()
-	defer h.mu.Unlock()
-	for _, p := range h.peers {
-		p.mu.Lock()
-		for _, sub := range p.subs {
-			_ = sub.Unsubscribe()
-		}
-		p.mu.Unlock()
-		_ = p.client.Close()
-	}
-}
-
-// subscribeRoom subscribes the peer to a room (idempotent) and wires the frame
-// handler to fan incoming messages out as Events. info labels each event with
-// the room's subject and encryption flag.
-func (p *peerState) subscribeRoom(roomID string, info roomInfo) error {
-	p.mu.Lock()
-	if _, already := p.subs[roomID]; already {
-		p.mu.Unlock()
-		return nil
-	}
-	p.mu.Unlock()
-
-	sub, err := p.client.Subscribe(roomID, func(f frame.Frame, plaintext []byte) {
-		p.emit(Event{
-			RoomID:    roomID,
-			Subject:   info.subject,
-			Sender:    f.Sender,
-			Text:      string(plaintext),
-			Encrypted: info.encrypt,
-			TS:        time.Now().UnixMilli(),
-		})
-	})
-	if err != nil {
-		return fmt.Errorf("subscribe room %s: %w", roomID, err)
-	}
-	p.mu.Lock()
-	p.subs[roomID] = sub
-	p.mu.Unlock()
-	p.setRoom(roomID, info)
-	return nil
-}
-
-// ---------------------------------------------------------------------------
-// Control-plane helper: fetch a room's subject + policy from membershipd. The
-// client package keeps fetchRoom private, so the playground talks to the
-// control plane directly (read endpoints are unauthenticated by design).
-// ---------------------------------------------------------------------------
-
-type ctrlRoomResp struct {
-	Subject string `json:"subject"`
-	Epoch   int    `json:"epoch"`
-	Policy  struct {
-		Encrypt  bool `json:"encrypt"`
-		Persist  bool `json:"persist"`
-		SignMsgs bool `json:"sign_msgs"`
-	} `json:"policy"`
-}
-
-func fetchRoomInfo(roomID string) (roomInfo, error) {
-	resp, err := http.Get(ctrlURL + "/rooms/" + roomID)
-	if err != nil {
-		return roomInfo{}, fmt.Errorf("fetch room %s: %w", roomID, err)
-	}
-	defer resp.Body.Close()
-	if resp.StatusCode >= 300 {
-		return roomInfo{}, fmt.Errorf("room %s not found (status %d)", roomID, resp.StatusCode)
-	}
-	var r ctrlRoomResp
-	if err := json.NewDecoder(resp.Body).Decode(&r); err != nil {
-		return roomInfo{}, fmt.Errorf("decode room %s: %w", roomID, err)
-	}
-	return roomInfo{subject: r.Subject, encrypt: r.Policy.Encrypt}, nil
-}
-
-// ---------------------------------------------------------------------------
-// HTTP handlers (web UI on :7700).
-// ---------------------------------------------------------------------------
-
-func writeJSON(w http.ResponseWriter, code int, v any) {
-	w.Header().Set("Content-Type", "application/json")
-	w.WriteHeader(code)
-	_ = json.NewEncoder(w).Encode(v)
-}
-
-func writeErr(w http.ResponseWriter, code int, msg string) {
-	writeJSON(w, code, map[string]string{"error": msg})
-}
-
-func decodeBody(r *http.Request, out any) error {
-	defer r.Body.Close()
-	return json.NewDecoder(r.Body).Decode(out)
-}
-
-func (h *Hub) handleIndex(w http.ResponseWriter, r *http.Request) {
-	if r.URL.Path != "/" {
-		http.NotFound(w, r)
-		return
-	}
-	w.Header().Set("Content-Type", "text/html; charset=utf-8")
-	_, _ = w.Write(indexHTML)
-}
-
-func (h *Hub) handlePeer(w http.ResponseWriter, r *http.Request) {
-	var req struct {
-		Name string `json:"name"`
-	}
-	if err := decodeBody(r, &req); err != nil || req.Name == "" {
-		writeErr(w, http.StatusBadRequest, "name required")
-		return
-	}
-	p, err := h.getOrCreate(req.Name)
-	if err != nil {
-		writeErr(w, http.StatusInternalServerError, err.Error())
-		return
-	}
-	writeJSON(w, http.StatusOK, map[string]string{"name": p.name, "endpoint_id": p.endpoint.ID})
-}
-
-func (h *Hub) handlePeers(w http.ResponseWriter, r *http.Request) {
-	writeJSON(w, http.StatusOK, h.list())
-}
-
-func (h *Hub) handleRoom(w http.ResponseWriter, r *http.Request) {
-	var req struct {
-		Peer    string `json:"peer"`
-		Subject string `json:"subject"`
-		Encrypt bool   `json:"encrypt"`
-		Persist bool   `json:"persist"`
-	}
-	if err := decodeBody(r, &req); err != nil || req.Peer == "" || req.Subject == "" {
-		writeErr(w, http.StatusBadRequest, "peer and subject required")
-		return
-	}
-	p, ok := h.lookup(req.Peer)
-	if !ok {
-		writeErr(w, http.StatusBadRequest, "unknown peer "+req.Peer)
-		return
-	}
-	// The two checkboxes map to an explicit per-room policy. encrypt drives both
-	// encryption and per-message signing; persist (default false) independently
-	// toggles durable JetStream history. persist=false keeps plain ephemeral NATS.
-	policy := room.Policy{Encrypt: req.Encrypt, Persist: req.Persist, SignMsgs: req.Encrypt}
-	roomID, err := p.client.CreateRoom(req.Subject, policy)
-	if err != nil {
-		writeErr(w, http.StatusInternalServerError, err.Error())
-		return
-	}
-	info := roomInfo{subject: req.Subject, encrypt: req.Encrypt}
-	if err := p.subscribeRoom(roomID, info); err != nil {
-		writeErr(w, http.StatusInternalServerError, err.Error())
-		return
-	}
-	writeJSON(w, http.StatusOK, map[string]any{
-		"room_id": roomID, "subject": req.Subject, "encrypt": req.Encrypt, "persist": req.Persist,
-	})
-}
-
-func (h *Hub) handleJoin(w http.ResponseWriter, r *http.Request) {
-	var req struct {
-		Peer   string `json:"peer"`
-		RoomID string `json:"room_id"`
-	}
-	if err := decodeBody(r, &req); err != nil || req.Peer == "" || req.RoomID == "" {
-		writeErr(w, http.StatusBadRequest, "peer and room_id required")
-		return
-	}
-	p, ok := h.lookup(req.Peer)
-	if !ok {
-		writeErr(w, http.StatusBadRequest, "unknown peer "+req.Peer)
-		return
-	}
-	if err := p.client.Join(req.RoomID); err != nil {
-		writeErr(w, http.StatusBadRequest, "join failed: "+err.Error())
-		return
-	}
-	info, err := fetchRoomInfo(req.RoomID)
-	if err != nil {
-		writeErr(w, http.StatusInternalServerError, err.Error())
-		return
-	}
-	if err := p.subscribeRoom(req.RoomID, info); err != nil {
-		writeErr(w, http.StatusInternalServerError, err.Error())
-		return
-	}
-	writeJSON(w, http.StatusOK, map[string]any{"subject": info.subject, "encrypt": info.encrypt})
-}
-
-func (h *Hub) handleInvite(w http.ResponseWriter, r *http.Request) {
-	var req struct {
-		Peer   string `json:"peer"`
-		RoomID string `json:"room_id"`
-		Target string `json:"target"`
-	}
-	if err := decodeBody(r, &req); err != nil || req.Peer == "" || req.RoomID == "" || req.Target == "" {
-		writeErr(w, http.StatusBadRequest, "peer, room_id and target required")
-		return
-	}
-	p, ok := h.lookup(req.Peer)
-	if !ok {
-		writeErr(w, http.StatusBadRequest, "unknown peer "+req.Peer)
-		return
-	}
-	target, ok := h.lookup(req.Target)
-	if !ok {
-		writeErr(w, http.StatusBadRequest, "target peer "+req.Target+" does not exist; connect it first")
-		return
-	}
-	if err := p.client.Invite(req.RoomID, target.endpoint); err != nil {
-		writeErr(w, http.StatusInternalServerError, err.Error())
-		return
-	}
-	writeJSON(w, http.StatusOK, map[string]string{"status": "invited", "target": req.Target})
-}
-
-func (h *Hub) handlePublish(w http.ResponseWriter, r *http.Request) {
-	var req struct {
-		Peer   string `json:"peer"`
-		RoomID string `json:"room_id"`
-		Text   string `json:"text"`
-	}
-	if err := decodeBody(r, &req); err != nil || req.Peer == "" || req.RoomID == "" {
-		writeErr(w, http.StatusBadRequest, "peer and room_id required")
-		return
-	}
-	p, ok := h.lookup(req.Peer)
-	if !ok {
-		writeErr(w, http.StatusBadRequest, "unknown peer "+req.Peer)
-		return
-	}
-	if err := p.client.Publish(req.RoomID, []byte(req.Text)); err != nil {
-		writeErr(w, http.StatusInternalServerError, err.Error())
-		return
-	}
-	writeJSON(w, http.StatusOK, map[string]string{"status": "published"})
-}
-
-func (h *Hub) handleKick(w http.ResponseWriter, r *http.Request) {
-	var req struct {
-		Peer   string `json:"peer"`
-		RoomID string `json:"room_id"`
-		Target string `json:"target"`
-	}
-	if err := decodeBody(r, &req); err != nil || req.Peer == "" || req.RoomID == "" || req.Target == "" {
-		writeErr(w, http.StatusBadRequest, "peer, room_id and target required")
-		return
-	}
-	p, ok := h.lookup(req.Peer)
-	if !ok {
-		writeErr(w, http.StatusBadRequest, "unknown peer "+req.Peer)
-		return
-	}
-	target, ok := h.lookup(req.Target)
-	if !ok {
-		writeErr(w, http.StatusBadRequest, "target peer "+req.Target+" does not exist")
-		return
-	}
-	if err := p.client.Kick(req.RoomID, target.endpoint.ID); err != nil {
-		writeErr(w, http.StatusInternalServerError, err.Error())
-		return
-	}
-	writeJSON(w, http.StatusOK, map[string]string{"status": "kicked", "target": req.Target})
-}
-
-// handleRooms returns the rooms a peer knows (created or joined). The SPA polls
-// or calls this after create/join to refresh its room list.
-//
-//	GET /api/rooms?peer=ana
-func (h *Hub) handleRooms(w http.ResponseWriter, r *http.Request) {
-	name := r.URL.Query().Get("peer")
-	if name == "" {
-		writeErr(w, http.StatusBadRequest, "peer query param required")
-		return
-	}
-	p, ok := h.lookup(name)
-	if !ok {
-		writeErr(w, http.StatusBadRequest, "unknown peer "+name)
-		return
-	}
-	writeJSON(w, http.StatusOK, p.roomList())
-}
-
-// handleMembers lists the members of a room (endpoint id + role) so the SPA can
-// render a members panel and drive invite/kick. It proxies the control plane's
-// unauthenticated read endpoint; the public keys it returns are not secret.
-//
-//	GET /api/members?room_id=<id>
-func (h *Hub) handleMembers(w http.ResponseWriter, r *http.Request) {
-	roomID := r.URL.Query().Get("room_id")
-	if roomID == "" {
-		writeErr(w, http.StatusBadRequest, "room_id query param required")
-		return
-	}
-	resp, err := http.Get(ctrlURL + "/rooms/" + roomID + "/members")
-	if err != nil {
-		writeErr(w, http.StatusInternalServerError, "fetch members: "+err.Error())
-		return
-	}
-	defer resp.Body.Close()
-	body, _ := io.ReadAll(resp.Body)
-	w.Header().Set("Content-Type", "application/json")
-	w.WriteHeader(resp.StatusCode)
-	_, _ = w.Write(body)
-}
-
-// withCORS allows the SPA running under the Vite dev server (a different origin)
-// to call the gateway. It answers preflight OPTIONS and tags every response with
-// permissive CORS headers. v1 trusts the local network, mirroring the control
-// plane's auth model.
-func withCORS(next http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Access-Control-Allow-Origin", "*")
-		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
-		w.Header().Set("Access-Control-Allow-Headers", "Content-Type")
-		if r.Method == http.MethodOptions {
-			w.WriteHeader(http.StatusNoContent)
-			return
-		}
-		next.ServeHTTP(w, r)
-	})
-}
-
-// handleStream is the SSE endpoint. The browser opens one EventSource per peer;
-// each received Event is emitted as a `data: <json>\n\n` block. The listener is
-// cleaned up when the HTTP request context is cancelled (tab closed / reload).
-func (h *Hub) handleStream(w http.ResponseWriter, r *http.Request) {
-	name := r.URL.Query().Get("peer")
-	if name == "" {
-		writeErr(w, http.StatusBadRequest, "peer query param required")
-		return
-	}
-	p, ok := h.lookup(name)
-	if !ok {
-		writeErr(w, http.StatusBadRequest, "unknown peer "+name)
-		return
-	}
-	flusher, ok := w.(http.Flusher)
-	if !ok {
-		writeErr(w, http.StatusInternalServerError, "streaming unsupported")
-		return
-	}
-
-	w.Header().Set("Content-Type", "text/event-stream")
-	w.Header().Set("Cache-Control", "no-cache")
-	w.Header().Set("Connection", "keep-alive")
-
-	ch := make(chan Event, 64)
-	p.addListener(ch)
-	defer p.removeListener(ch)
-
-	// Initial comment so the browser marks the stream open immediately.
-	fmt.Fprintf(w, ": connected to %s\n\n", name)
-	flusher.Flush()
-
-	ctx := r.Context()
-	ping := time.NewTicker(20 * time.Second)
-	defer ping.Stop()
-	for {
-		select {
-		case <-ctx.Done():
-			return
-		case <-ping.C:
-			fmt.Fprintf(w, ": ping\n\n")
-			flusher.Flush()
-		case ev := <-ch:
-			b, err := json.Marshal(ev)
-			if err != nil {
-				continue
-			}
-			fmt.Fprintf(w, "data: %s\n\n", b)
-			flusher.Flush()
-		}
-	}
-}
-
-// ---------------------------------------------------------------------------
-// Benchmark: one publisher floods a room with thousands of messages that N
-// subscribers receive. The two policy axes are exposed as independent flags:
-// encrypt (AEAD payload + Ed25519 per-message signature) and persist (durable
-// JetStream history vs ephemeral core NATS). Payload size is configurable. The
-// benchmark uses its own ephemeral peers (not the hub's named peers) so it never
-// interferes with the manual sandbox, and streams progress samples over SSE so
-// the browser can animate a live throughput chart.
-// ---------------------------------------------------------------------------
-
-// benchSample is one Server-Sent Event of a running benchmark.
-type benchSample struct {
-	Type    string  `json:"type"` // "start" | "sample" | "done" | "error"
-	T       float64 `json:"t"`
-	Sent    int64   `json:"sent"`
-	Recv    int64   `json:"recv"`
-	NMsgs   int     `json:"n_msgs,omitempty"`
-	NSubs   int     `json:"n_subs,omitempty"`
-	Payload int     `json:"payload,omitempty"`
-	Encrypt bool    `json:"encrypt,omitempty"`
-	Persist bool    `json:"persist,omitempty"`
-	Capped  bool    `json:"capped,omitempty"`
-	PubTps  int64   `json:"pub_tps,omitempty"`
-	RecvTps int64   `json:"recv_tps,omitempty"`
-	PerSub  []int64 `json:"per_sub,omitempty"`
-	Msg     string  `json:"msg,omitempty"`
-}
-
-// runBench wires up one publisher + nSubs subscribers, publishes nMsgs payloads,
-// and calls emit periodically with the running totals. emit is only ever called
-// from the calling goroutine (the SSE handler), so it needs no locking.
-func runBench(ctx context.Context, emit func(benchSample), nMsgs, nSubs, payloadBytes int, encrypt, persist bool) {
-	policy := room.Policy{Encrypt: encrypt, Persist: persist, SignMsgs: encrypt}
-	subject := fmt.Sprintf("bench.%d", time.Now().UnixNano())
-
-	newPeer := func() (*client.Client, error) {
-		id, err := cs.GenerateIdentity()
-		if err != nil {
-			return nil, err
-		}
-		return client.New(natsURL, ctrlURL, id)
-	}
-
-	pub, err := newPeer()
-	if err != nil {
-		emit(benchSample{Type: "error", Msg: "publisher: " + err.Error()})
-		return
-	}
-	defer pub.Close()
-
-	roomID, err := pub.CreateRoom(subject, policy)
-	if err != nil {
-		emit(benchSample{Type: "error", Msg: "create room: " + err.Error()})
-		return
-	}
-
-	counters := make([]int64, nSubs)
-	subClients := make([]*client.Client, 0, nSubs)
-	defer func() {
-		for _, c := range subClients {
-			_ = c.Close()
-		}
-	}()
-
-	// One room, N subscribers. For encrypted rooms each subscriber must be invited
-	// (sealed key) and join before subscribing; for cleartext rooms Subscribe on
-	// the shared roomID is enough.
-	for i := 0; i < nSubs; i++ {
-		c, err := newPeer()
-		if err != nil {
-			emit(benchSample{Type: "error", Msg: fmt.Sprintf("subscriber %d: %v", i, err)})
-			return
-		}
-		subClients = append(subClients, c)
-		if encrypt {
-			if err := pub.Invite(roomID, c.Endpoint()); err != nil {
-				emit(benchSample{Type: "error", Msg: fmt.Sprintf("invite %d: %v", i, err)})
-				return
-			}
-			if err := c.Join(roomID); err != nil {
-				emit(benchSample{Type: "error", Msg: fmt.Sprintf("join %d: %v", i, err)})
-				return
-			}
-		}
-		idx := i
-		if _, err := c.Subscribe(roomID, func(_ frame.Frame, _ []byte) {
-			atomic.AddInt64(&counters[idx], 1)
-		}); err != nil {
-			emit(benchSample{Type: "error", Msg: fmt.Sprintf("subscribe %d: %v", i, err)})
-			return
-		}
-	}
-
-	sumRecv := func() int64 {
-		var s int64
-		for i := range counters {
-			s += atomic.LoadInt64(&counters[i])
-		}
-		return s
-	}
-
-	payload := bytes.Repeat([]byte{'x'}, payloadBytes)
-	var sent int64
-
-	emit(benchSample{Type: "start", NMsgs: nMsgs, NSubs: nSubs, Payload: payloadBytes, Encrypt: encrypt, Persist: persist})
-
-	t0 := time.Now()
-	done := make(chan struct{})
-	var pubErr atomic.Value
-	go func() {
-		defer close(done)
-		for k := 0; k < nMsgs; k++ {
-			if err := pub.Publish(roomID, payload); err != nil {
-				pubErr.Store(err)
-				return
-			}
-			atomic.AddInt64(&sent, 1)
-			if k%256 == 0 {
-				select {
-				case <-ctx.Done():
-					return
-				default:
-				}
-			}
-		}
-	}()
-
-	ticker := time.NewTicker(60 * time.Millisecond)
-	defer ticker.Stop()
-	deadline := time.After(120 * time.Second)
-	target := int64(nMsgs) * int64(nSubs)
-
-sampleLoop:
-	for {
-		select {
-		case <-ctx.Done():
-			return
-		case <-deadline:
-			break sampleLoop
-		case <-done:
-			break sampleLoop
-		case <-ticker.C:
-			emit(benchSample{Type: "sample", T: time.Since(t0).Seconds(), Sent: atomic.LoadInt64(&sent), Recv: sumRecv()})
-		}
-	}
-	if v := pubErr.Load(); v != nil {
-		emit(benchSample{Type: "error", Msg: "publish: " + v.(error).Error()})
-		return
-	}
-
-	// Final drain: keep sampling until every subscriber has caught up (or we give up).
-	for i := 0; i < 240; i++ {
-		if sumRecv() >= target {
-			break
-		}
-		select {
-		case <-ctx.Done():
-			return
-		case <-time.After(25 * time.Millisecond):
-		}
-		emit(benchSample{Type: "sample", T: time.Since(t0).Seconds(), Sent: atomic.LoadInt64(&sent), Recv: sumRecv()})
-	}
-
-	dur := time.Since(t0).Seconds()
-	finalSent := atomic.LoadInt64(&sent)
-	finalRecv := sumRecv()
-	per := make([]int64, nSubs)
-	for i := range counters {
-		per[i] = atomic.LoadInt64(&counters[i])
-	}
-	var pubTps, recvTps int64
-	if dur > 0 {
-		pubTps = int64(float64(finalSent) / dur)
-		recvTps = int64(float64(finalRecv) / dur)
-	}
-	emit(benchSample{Type: "done", T: dur, Sent: finalSent, Recv: finalRecv, PerSub: per, PubTps: pubTps, RecvTps: recvTps, NSubs: nSubs})
-}
-
-// handleBench is the SSE endpoint that drives a benchmark from query params:
-//
-//	GET /api/bench?n_msgs=20000&n_subs=3&payload=128&encrypt=0&persist=0
-//
-// Encrypted/persistent runs are capped to a lower message count (the per-message
-// crypto + JetStream ack make them far slower); the cap is reported in the start
-// sample so the UI can show it.
-func (h *Hub) handleBench(w http.ResponseWriter, r *http.Request) {
-	q := r.URL.Query()
-	atoiDef := func(k string, def int) int {
-		if v, err := strconv.Atoi(q.Get(k)); err == nil {
-			return v
-		}
-		return def
-	}
-	truthy := func(k string) bool { v := q.Get(k); return v == "1" || v == "true" }
-
-	nMsgs := atoiDef("n_msgs", 20000)
-	nSubs := atoiDef("n_subs", 3)
-	payload := atoiDef("payload", 128)
-	encrypt := truthy("encrypt")
-	persist := truthy("persist")
-
-	if nSubs < 1 {
-		nSubs = 1
-	} else if nSubs > 16 {
-		nSubs = 16
-	}
-	if payload < 1 {
-		payload = 1
-	} else if payload > 8192 {
-		payload = 8192
-	}
-	if nMsgs < 100 {
-		nMsgs = 100
-	}
-	maxMsgs := 200000
-	if encrypt || persist {
-		maxMsgs = 30000 // crypto + JetStream ack are much slower; keep the run bounded
-	}
-	capped := false
-	if nMsgs > maxMsgs {
-		nMsgs, capped = maxMsgs, true
-	}
-
-	flusher, ok := w.(http.Flusher)
-	if !ok {
-		writeErr(w, http.StatusInternalServerError, "streaming unsupported")
-		return
-	}
-	w.Header().Set("Content-Type", "text/event-stream")
-	w.Header().Set("Cache-Control", "no-cache")
-	w.Header().Set("Connection", "keep-alive")
-	fmt.Fprintf(w, ": bench start\n\n")
-	flusher.Flush()
-
-	emit := func(s benchSample) {
-		if s.Type == "start" {
-			s.Capped = capped
-		}
-		b, err := json.Marshal(s)
-		if err != nil {
-			return
-		}
-		fmt.Fprintf(w, "data: %s\n\n", b)
-		flusher.Flush()
-	}
-
-	runBench(r.Context(), emit, nMsgs, nSubs, payload, encrypt, persist)
-	fmt.Fprintf(w, "event: end\ndata: {}\n\n")
-	flusher.Flush()
-}
-
-// ---------------------------------------------------------------------------
-// main: bring up NATS, control plane, and the web server; tear them all down
-// cleanly on signal.
-// ---------------------------------------------------------------------------
-
-func main() {
-	log.SetFlags(log.LstdFlags | log.Lmsgprefix)
-	log.SetPrefix("[playground] ")
-
-	if err := os.MkdirAll(localFiles, 0o755); err != nil {
-		log.Fatalf("mkdir %s: %v", localFiles, err)
-	}
-
-	// 1. Data plane: embedded NATS + JetStream on the fixed internal port.
-	ns, err := embeddednats.Start(filepath.Join(localFiles, "js"), natsPort)
-	if err != nil {
-		log.Fatalf("start embedded nats: %v", err)
-	}
-	log.Printf("embedded NATS (JetStream) ready: %s", embeddednats.ClientURL(ns))
-
-	// 2. Control plane: membership store + blob store + internal HTTP server.
-	store, err := membership.Open(filepath.Join(localFiles, "play.db"))
-	if err != nil {
-		ns.Shutdown()
-		log.Fatalf("open membership store: %v", err)
-	}
-	blobs, err := blobstore.New(filepath.Join(localFiles, "blobs"))
-	if err != nil {
-		store.Close()
-		ns.Shutdown()
-		log.Fatalf("open blob store: %v", err)
-	}
-	// AuthOff: the playground is a local dev gateway that has not migrated to
-	// signed control-plane requests or a secured upstream bus yet. What it would
-	// need is written up in dev/0001e-remaining-clients.md (issue 0001, phase 0001e).
-	ctrlSrv := &http.Server{Addr: ctrlAddr, Handler: membership.NewServer(store, blobs, membership.AuthOff)}
-	go func() {
-		if err := ctrlSrv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
-			log.Fatalf("control plane: %v", err)
-		}
-	}()
-	if err := waitHealthy(ctrlURL+"/healthz", 5*time.Second); err != nil {
-		log.Fatalf("control plane not healthy: %v", err)
-	}
-	log.Printf("control plane ready: %s", ctrlURL)
-
-	// 3. Web UI on :7700.
-	hub := newHub()
-	mux := http.NewServeMux()
-	mux.HandleFunc("/", hub.handleIndex)
-	mux.HandleFunc("POST /api/peer", hub.handlePeer)
-	mux.HandleFunc("GET /api/peers", hub.handlePeers)
-	mux.HandleFunc("POST /api/room", hub.handleRoom)
-	mux.HandleFunc("POST /api/join", hub.handleJoin)
-	mux.HandleFunc("POST /api/invite", hub.handleInvite)
-	mux.HandleFunc("POST /api/publish", hub.handlePublish)
-	mux.HandleFunc("POST /api/kick", hub.handleKick)
-	mux.HandleFunc("GET /api/rooms", hub.handleRooms)
-	mux.HandleFunc("GET /api/members", hub.handleMembers)
-	mux.HandleFunc("GET /api/stream", hub.handleStream)
-	mux.HandleFunc("GET /api/bench", hub.handleBench)
-	webSrv := &http.Server{Addr: webAddr, Handler: withCORS(mux)}
-	go func() {
-		if err := webSrv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
-			log.Fatalf("web server: %v", err)
-		}
-	}()
-	log.Printf("web UI ready: http://%s", webAddr)
-	log.Printf("open http://localhost:7700 in two browser tabs to try the bus")
-
-	// 4. Graceful shutdown.
-	stop := make(chan os.Signal, 1)
-	signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)
-	<-stop
-	log.Printf("shutting down...")
-
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
-	defer cancel()
-	_ = webSrv.Shutdown(ctx)
-	hub.closeAll()
-	_ = ctrlSrv.Shutdown(ctx)
-	store.Close()
-	ns.Shutdown()
-	ns.WaitForShutdown()
-	log.Printf("bye")
-}
-
-// waitHealthy polls url until it returns a 2xx/3xx or the deadline elapses.
-func waitHealthy(url string, timeout time.Duration) error {
-	deadline := time.Now().Add(timeout)
-	c := &http.Client{Timeout: 500 * time.Millisecond}
-	for time.Now().Before(deadline) {
-		resp, err := c.Get(url)
-		if err == nil {
-			resp.Body.Close()
-			if resp.StatusCode < 400 {
-				return nil
-			}
-		}
-		time.Sleep(100 * time.Millisecond)
-	}
-	return fmt.Errorf("timeout waiting for %s", url)
-}

web/index.html

@@ -3,7 +3,7 @@
   <head>
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>unibus · chat</title>
+    <title>unibus</title>
   </head>
   <body>
     <div id="root"></div>

web/package.json

@@ -3,7 +3,6 @@
   "private": true,
   "version": "0.1.0",
   "type": "module",
-  "description": "SPA de chat para el bus unibus (rooms cifradas E2E, mensajes en vivo por SSE).",
   "scripts": {
     "dev": "vite",
     "build": "tsc -b && vite build",
@@ -23,7 +22,7 @@
     "postcss": "^8.4.49",
     "postcss-preset-mantine": "^1.17.0",
     "postcss-simple-vars": "^7.0.1",
-    "typescript": "^5.6.3",
+    "typescript": "~5.6.3",
     "vite": "^6.0.3"
   }
 }

web/pnpm-lock.yaml

@@ -10,7 +10,7 @@ importers:
     dependencies:
       '@mantine/core':
         specifier: ^9.3.0
-        version: 9.3.0(@mantine/hooks@9.3.0(react@19.2.7))(@types/react@19.2.16)(react-dom@19.2.7(react@19.2.7))(react@19.2.7)
+        version: 9.3.0(@mantine/hooks@9.3.0(react@19.2.7))(@types/react@19.2.17)(react-dom@19.2.7(react@19.2.7))(react@19.2.7)
       '@mantine/hooks':
         specifier: ^9.3.0
         version: 9.3.0(react@19.2.7)
@@ -26,10 +26,10 @@ importers:
     devDependencies:
       '@types/react':
         specifier: ^19.2.0
-        version: 19.2.16
+        version: 19.2.17
       '@types/react-dom':
         specifier: ^19.2.0
-        version: 19.2.3(@types/react@19.2.16)
+        version: 19.2.3(@types/react@19.2.17)
       '@vitejs/plugin-react':
         specifier: ^4.3.4
         version: 4.7.0(vite@6.4.3(sugarss@5.0.1(postcss@8.5.15)))
@@ -43,8 +43,8 @@ importers:
         specifier: ^7.0.1
         version: 7.0.1(postcss@8.5.15)
       typescript:
-        specifier: ^5.6.3
-        version: 5.9.3
+        specifier: ~5.6.3
+        version: 5.6.3
       vite:
         specifier: ^6.0.3
         version: 6.4.3(sugarss@5.0.1(postcss@8.5.15))
@@ -508,8 +508,8 @@ packages:
     peerDependencies:
       '@types/react': ^19.2.0
 
-  '@types/react@19.2.16':
-    resolution: {integrity: sha512-esJiCAnl0kfpNdE69f3So4WJUXy95dLZydX0KwK46riIHDzHM7O9Vtf9xCHW0PXIqvgqNrswl522kA/5yx+F4w==}
+  '@types/react@19.2.17':
+    resolution: {integrity: sha512-MXfmqaVPEVgkBT/aY0aGCkRWWtByiYQXo3xdQ8r5RzuFrPiRn8Gar2tQdXSUQ2GKV3bkXckek89V8wQBY2Q/Aw==}
 
   '@vitejs/plugin-react@4.7.0':
     resolution: {integrity: sha512-gUu9hwfWvvEDBBmgtAowQCojwZmJ5mcLn3aufeCsitijs3+f2NsrPtlAWIR6OPiqljl96GVCUbLe0HyqIpVaoA==}
@@ -517,8 +517,8 @@ packages:
     peerDependencies:
       vite: ^4.2.0 || ^5.0.0 || ^6.0.0 || ^7.0.0
 
-  baseline-browser-mapping@2.10.33:
-    resolution: {integrity: sha512-bA6+tcSLpz2tIEdDXZPpPTIuxBcC4+w6SieaYyfigIa4h8GlFxbA17v22Vx3JUtuZQj9SgOsnbK+aTBzyDyEuw==}
+  baseline-browser-mapping@2.10.34:
+    resolution: {integrity: sha512-IMDedajPifLnHNY0X9n8hKxRTQ6/eTHwr5bDo04WnuqxyKw6LYtQywCuuqPZwhl3aBXMvQpJov42GLCwRRdQzw==}
     engines: {node: '>=6.0.0'}
     hasBin: true
 
@@ -531,8 +531,8 @@ packages:
     resolution: {integrity: sha512-QOSvevhslijgYwRx6Rv7zKdMF8lbRmx+uQGx2+vDc+KI/eBnsy9kit5aj23AgGu3pa4t9AgwbnXWqS+iOY+2aA==}
     engines: {node: '>= 6'}
 
-  caniuse-lite@1.0.30001793:
-    resolution: {integrity: sha512-iwSsYWaCOoh26cV8NwNRViHlrfUvYsHDfRVcbtmw0Kg6PJIZZXwMkj1442FYLBGkeUf1juAsU3DTfxW579mrPA==}
+  caniuse-lite@1.0.30001797:
+    resolution: {integrity: sha512-l8xKG+gwAIExZGl9FrF7KUwuOmk6wbEPC9Xoy/RtnWv1XG0Q4LFlagaLpUv3Kiza3W/wm27zy0yWJEieYKAP6w==}
 
   clsx@2.1.1:
     resolution: {integrity: sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA==}
@@ -756,8 +756,8 @@ packages:
     resolution: {integrity: sha512-1URUxUqfHFM1c+zfSPsa3gnkO7Aq21qyH75SIduNYz4SzY964rn1X2vCMQaHSHhktiw+0kPa2iyb6PUpXqB6Vg==}
     engines: {node: '>=20'}
 
-  typescript@5.9.3:
-    resolution: {integrity: sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==}
+  typescript@5.6.3:
+    resolution: {integrity: sha512-hjcS1mhfuyi4WW8IWtjP7brDrG2cuDZukyrYrSauoXGNgx0S7zceP07adYkJycEr56BOUTNPzbInooiN3fn1qw==}
     engines: {node: '>=14.17'}
     hasBin: true
 
@@ -1069,7 +1069,7 @@ snapshots:
       '@jridgewell/resolve-uri': 3.1.2
       '@jridgewell/sourcemap-codec': 1.5.5
 
-  '@mantine/core@9.3.0(@mantine/hooks@9.3.0(react@19.2.7))(@types/react@19.2.16)(react-dom@19.2.7(react@19.2.7))(react@19.2.7)':
+  '@mantine/core@9.3.0(@mantine/hooks@9.3.0(react@19.2.7))(@types/react@19.2.17)(react-dom@19.2.7(react@19.2.7))(react@19.2.7)':
     dependencies:
       '@floating-ui/react': 0.27.19(react-dom@19.2.7(react@19.2.7))(react@19.2.7)
       '@mantine/hooks': 9.3.0(react@19.2.7)
@@ -1077,7 +1077,7 @@ snapshots:
       react: 19.2.7
       react-dom: 19.2.7(react@19.2.7)
       react-number-format: 5.4.5(react-dom@19.2.7(react@19.2.7))(react@19.2.7)
-      react-remove-scroll: 2.7.2(@types/react@19.2.16)(react@19.2.7)
+      react-remove-scroll: 2.7.2(@types/react@19.2.17)(react@19.2.7)
       type-fest: 5.7.0
     transitivePeerDependencies:
       - '@types/react'
@@ -1193,11 +1193,11 @@ snapshots:
 
   '@types/estree@1.0.9': {}
 
-  '@types/react-dom@19.2.3(@types/react@19.2.16)':
+  '@types/react-dom@19.2.3(@types/react@19.2.17)':
     dependencies:
-      '@types/react': 19.2.16
+      '@types/react': 19.2.17
 
-  '@types/react@19.2.16':
+  '@types/react@19.2.17':
     dependencies:
       csstype: 3.2.3
 
@@ -1213,19 +1213,19 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
-  baseline-browser-mapping@2.10.33: {}
+  baseline-browser-mapping@2.10.34: {}
 
   browserslist@4.28.2:
     dependencies:
-      baseline-browser-mapping: 2.10.33
-      caniuse-lite: 1.0.30001793
+      baseline-browser-mapping: 2.10.34
+      caniuse-lite: 1.0.30001797
       electron-to-chromium: 1.5.368
       node-releases: 2.0.47
       update-browserslist-db: 1.2.3(browserslist@4.28.2)
 
   camelcase-css@2.0.1: {}
 
-  caniuse-lite@1.0.30001793: {}
+  caniuse-lite@1.0.30001797: {}
 
   clsx@2.1.1: {}
 
@@ -1356,32 +1356,32 @@ snapshots:
 
   react-refresh@0.17.0: {}
 
-  react-remove-scroll-bar@2.3.8(@types/react@19.2.16)(react@19.2.7):
+  react-remove-scroll-bar@2.3.8(@types/react@19.2.17)(react@19.2.7):
     dependencies:
       react: 19.2.7
-      react-style-singleton: 2.2.3(@types/react@19.2.16)(react@19.2.7)
+      react-style-singleton: 2.2.3(@types/react@19.2.17)(react@19.2.7)
       tslib: 2.8.1
     optionalDependencies:
-      '@types/react': 19.2.16
+      '@types/react': 19.2.17
 
-  react-remove-scroll@2.7.2(@types/react@19.2.16)(react@19.2.7):
+  react-remove-scroll@2.7.2(@types/react@19.2.17)(react@19.2.7):
     dependencies:
       react: 19.2.7
-      react-remove-scroll-bar: 2.3.8(@types/react@19.2.16)(react@19.2.7)
-      react-style-singleton: 2.2.3(@types/react@19.2.16)(react@19.2.7)
+      react-remove-scroll-bar: 2.3.8(@types/react@19.2.17)(react@19.2.7)
+      react-style-singleton: 2.2.3(@types/react@19.2.17)(react@19.2.7)
       tslib: 2.8.1
-      use-callback-ref: 1.3.3(@types/react@19.2.16)(react@19.2.7)
-      use-sidecar: 1.1.3(@types/react@19.2.16)(react@19.2.7)
+      use-callback-ref: 1.3.3(@types/react@19.2.17)(react@19.2.7)
+      use-sidecar: 1.1.3(@types/react@19.2.17)(react@19.2.7)
     optionalDependencies:
-      '@types/react': 19.2.16
+      '@types/react': 19.2.17
 
-  react-style-singleton@2.2.3(@types/react@19.2.16)(react@19.2.7):
+  react-style-singleton@2.2.3(@types/react@19.2.17)(react@19.2.7):
     dependencies:
       get-nonce: 1.0.1
       react: 19.2.7
       tslib: 2.8.1
     optionalDependencies:
-      '@types/react': 19.2.16
+      '@types/react': 19.2.17
 
   react@19.2.7: {}
 
@@ -1441,7 +1441,7 @@ snapshots:
     dependencies:
       tagged-tag: 1.0.0
 
-  typescript@5.9.3: {}
+  typescript@5.6.3: {}
 
   update-browserslist-db@1.2.3(browserslist@4.28.2):
     dependencies:
@@ -1449,20 +1449,20 @@ snapshots:
       escalade: 3.2.0
       picocolors: 1.1.1
 
-  use-callback-ref@1.3.3(@types/react@19.2.16)(react@19.2.7):
+  use-callback-ref@1.3.3(@types/react@19.2.17)(react@19.2.7):
     dependencies:
       react: 19.2.7
       tslib: 2.8.1
     optionalDependencies:
-      '@types/react': 19.2.16
+      '@types/react': 19.2.17
 
-  use-sidecar@1.1.3(@types/react@19.2.16)(react@19.2.7):
+  use-sidecar@1.1.3(@types/react@19.2.17)(react@19.2.7):
     dependencies:
       detect-node-es: 1.1.0
       react: 19.2.7
       tslib: 2.8.1
     optionalDependencies:
-      '@types/react': 19.2.16
+      '@types/react': 19.2.17
 
   util-deprecate@1.0.2: {}
 

web/src/App.tsx

@@ -1,29 +1,11 @@
 import { useState } from "react";
-import { GatewayClient } from "./api";
-import type { Peer } from "./types";
-import { ConnectScreen } from "./components/ConnectScreen";
-import { ChatLayout } from "./components/ChatLayout";
+import { Login } from "./Login";
+import { ChatShell } from "./ChatShell";
+import type { User } from "./types";
 
-// Connection holds the live gateway client plus the identity it connected as.
-interface Connection {
-  client: GatewayClient;
-  peer: Peer;
-}
-
-// App is the root: it shows the connect screen until the user picks a gateway
-// URL and a peer name, then swaps to the full chat layout. Disconnecting drops
-// back to the connect screen.
 export function App() {
-  const [conn, setConn] = useState<Connection | null>(null);
+  const [user, setUser] = useState<User | null>(null);
 
-  if (!conn) {
-    return <ConnectScreen onConnect={(client, peer) => setConn({ client, peer })} />;
-  }
-  return (
-    <ChatLayout
-      client={conn.client}
-      peer={conn.peer}
-      onDisconnect={() => setConn(null)}
-    />
-  );
+  if (!user) return <Login onLogin={setUser} />;
+  return <ChatShell user={user} onLogout={() => setUser(null)} />;
 }

web/src/ChatPanel.tsx

@@ -0,0 +1,161 @@
+import { useEffect, useRef, useState } from "react";
+import {
+  ActionIcon,
+  Avatar,
+  Box,
+  Center,
+  Divider,
+  Group,
+  ScrollArea,
+  Stack,
+  Text,
+  TextInput,
+  Tooltip,
+} from "@mantine/core";
+import {
+  IconSend,
+  IconLock,
+  IconHash,
+  IconDotsVertical,
+  IconPaperclip,
+} from "@tabler/icons-react";
+import type { Message, Room, User } from "./types";
+
+function initials(s: string) {
+  return s.replace(/[^a-z0-9]/gi, "").slice(0, 2).toUpperCase() || "?";
+}
+function timeShort(ts: number) {
+  const d = new Date(ts);
+  return `${String(d.getHours()).padStart(2, "0")}:${String(
+    d.getMinutes(),
+  ).padStart(2, "0")}`;
+}
+
+function MessageRow({ msg }: { msg: Message }) {
+  return (
+    <Group align="flex-start" gap="sm" wrap="nowrap">
+      <Avatar radius="xl" size={36} color={msg.mine ? "brand" : "gray"}>
+        {initials(msg.sender)}
+      </Avatar>
+      <Box style={{ minWidth: 0 }}>
+        <Group gap={8} align="baseline">
+          <Text size="sm" fw={600} c={msg.mine ? "brand.4" : undefined}>
+            {msg.sender}
+          </Text>
+          <Text size="xs" c="dimmed">
+            {timeShort(msg.ts)}
+          </Text>
+        </Group>
+        <Text size="sm" style={{ wordBreak: "break-word" }}>
+          {msg.body}
+        </Text>
+      </Box>
+    </Group>
+  );
+}
+
+export function ChatPanel({
+  room,
+  user,
+}: {
+  room: Room | undefined;
+  user: User;
+}) {
+  const [draft, setDraft] = useState("");
+  const [extra, setExtra] = useState<Record<string, Message[]>>({});
+  const viewport = useRef<HTMLDivElement>(null);
+
+  const msgs = room ? [...room.messages, ...(extra[room.id] ?? [])] : [];
+
+  useEffect(() => {
+    viewport.current?.scrollTo({ top: viewport.current.scrollHeight });
+  }, [room?.id, msgs.length]);
+
+  if (!room) {
+    return (
+      <Center h="100%">
+        <Text c="dimmed">Selecciona una conversación</Text>
+      </Center>
+    );
+  }
+
+  const send = () => {
+    const body = draft.trim();
+    if (!body) return;
+    const msg: Message = {
+      id: `local-${Date.now()}`,
+      sender: user.handle,
+      body,
+      ts: Date.now(),
+      mine: true,
+    };
+    setExtra((e) => ({ ...e, [room.id]: [...(e[room.id] ?? []), msg] }));
+    setDraft("");
+  };
+
+  return (
+    <Stack h="100vh" gap={0}>
+      <Group justify="space-between" px="md" py="xs" wrap="nowrap">
+        <Group gap="sm" wrap="nowrap" style={{ minWidth: 0 }}>
+          <Avatar radius="md" size={38} color="brand">
+            {initials(room.name)}
+          </Avatar>
+          <Box style={{ minWidth: 0 }}>
+            <Group gap={6} wrap="nowrap">
+              <Text fw={650} truncate>
+                {room.name}
+              </Text>
+              {room.encrypted ? (
+                <Tooltip label="Cifrada de extremo a extremo">
+                  <IconLock size={14} style={{ opacity: 0.6 }} />
+                </Tooltip>
+              ) : (
+                <IconHash size={14} style={{ opacity: 0.6 }} />
+              )}
+            </Group>
+            <Text size="xs" c="dimmed">
+              {room.encrypted ? "cifrada · E2E" : "abierta · cleartext"}
+            </Text>
+          </Box>
+        </Group>
+        <ActionIcon variant="subtle" color="gray">
+          <IconDotsVertical size={18} />
+        </ActionIcon>
+      </Group>
+      <Divider color="dark.4" />
+
+      <ScrollArea style={{ flex: 1 }} viewportRef={viewport}>
+        <Stack gap="lg" p="md">
+          {msgs.map((m) => (
+            <MessageRow key={m.id} msg={m} />
+          ))}
+        </Stack>
+      </ScrollArea>
+
+      <Divider color="dark.4" />
+      <Group p="sm" gap="xs" wrap="nowrap">
+        <ActionIcon variant="subtle" color="gray" size="lg">
+          <IconPaperclip size={18} />
+        </ActionIcon>
+        <TextInput
+          style={{ flex: 1 }}
+          radius="xl"
+          placeholder={`Mensaje a ${room.name}`}
+          value={draft}
+          onChange={(e) => setDraft(e.currentTarget.value)}
+          onKeyDown={(e) => e.key === "Enter" && send()}
+        />
+        <ActionIcon
+          size="lg"
+          radius="xl"
+          variant="filled"
+          color="brand"
+          onClick={send}
+          disabled={!draft.trim()}
+        >
+          <IconSend size={18} />
+        </ActionIcon>
+      </Group>
+    </Stack>
+  );
+}

web/src/ChatShell.tsx

@@ -0,0 +1,43 @@
+import { useState } from "react";
+import { Flex, Box } from "@mantine/core";
+import { Sidebar } from "./Sidebar";
+import { ChatPanel } from "./ChatPanel";
+import { MOCK_ROOMS } from "./mock";
+import type { User } from "./types";
+
+export function ChatShell({
+  user,
+  onLogout,
+}: {
+  user: User;
+  onLogout: () => void;
+}) {
+  const [rooms] = useState(MOCK_ROOMS);
+  const [activeId, setActiveId] = useState<string>(rooms[0]?.id ?? "");
+  const active = rooms.find((r) => r.id === activeId);
+
+  return (
+    <Flex h="100vh" w="100vw" style={{ overflow: "hidden" }}>
+      <Box
+        w={320}
+        h="100%"
+        bg="dark.8"
+        style={{
+          borderRight: "1px solid var(--mantine-color-dark-4)",
+          flexShrink: 0,
+        }}
+      >
+        <Sidebar
+          user={user}
+          rooms={rooms}
+          activeId={activeId}
+          onSelect={setActiveId}
+          onLogout={onLogout}
+        />
+      </Box>
+      <Box flex={1} h="100%" bg="dark.7" style={{ minWidth: 0 }}>
+        <ChatPanel room={active} user={user} />
+      </Box>
+    </Flex>
+  );
+}

web/src/Login.tsx

@@ -0,0 +1,64 @@
+import { useState } from "react";
+import {
+  Button,
+  Card,
+  Center,
+  PasswordInput,
+  Stack,
+  Text,
+  TextInput,
+  ThemeIcon,
+  Title,
+} from "@mantine/core";
+import { IconShieldLock, IconKey } from "@tabler/icons-react";
+import type { User } from "./types";
+
+export function Login({ onLogin }: { onLogin: (u: User) => void }) {
+  const [handle, setHandle] = useState("");
+  const [password, setPassword] = useState("");
+  const ready = handle.trim().length > 0 && password.length > 0;
+  const connect = () => {
+    const h = handle.trim();
+    if (ready) onLogin({ id: h, handle: h });
+  };
+
+  return (
+    <Center h="100vh" bg="dark.9">
+      <Card w={380} p="xl" radius="lg" withBorder bg="dark.7">
+        <Stack align="center" gap="lg">
+          <ThemeIcon size={60} radius="xl" variant="light" color="brand">
+            <IconShieldLock size={32} />
+          </ThemeIcon>
+          <Stack gap={2} align="center">
+            <Title order={2}>unibus</Title>
+            <Text c="dimmed" size="sm">
+              Mensajería cifrada de extremo a extremo
+            </Text>
+          </Stack>
+          <TextInput
+            w="100%"
+            label="Identidad"
+            placeholder="tu-handle"
+            value={handle}
+            onChange={(e) => setHandle(e.currentTarget.value)}
+            onKeyDown={(e) => e.key === "Enter" && connect()}
+            data-autofocus
+          />
+          <PasswordInput
+            w="100%"
+            label="Contraseña"
+            description="Desbloquea tu identidad cifrada en este dispositivo"
+            placeholder="••••••••"
+            leftSection={<IconKey size={16} />}
+            value={password}
+            onChange={(e) => setPassword(e.currentTarget.value)}
+            onKeyDown={(e) => e.key === "Enter" && connect()}
+          />
+          <Button w="100%" size="md" onClick={connect} disabled={!ready}>
+            Conectar
+          </Button>
+        </Stack>
+      </Card>
+    </Center>
+  );
+}

web/src/Sidebar.tsx

@@ -0,0 +1,173 @@
+import { useState } from "react";
+import {
+  Avatar,
+  Badge,
+  Box,
+  Divider,
+  Group,
+  Menu,
+  ScrollArea,
+  Stack,
+  Text,
+  TextInput,
+  UnstyledButton,
+} from "@mantine/core";
+import {
+  IconSearch,
+  IconLogout,
+  IconDots,
+  IconLock,
+  IconHash,
+} from "@tabler/icons-react";
+import type { Room, User } from "./types";
+
+function initials(s: string) {
+  return s.replace(/[^a-z0-9]/gi, "").slice(0, 2).toUpperCase() || "?";
+}
+
+function timeShort(ts: number) {
+  const d = new Date(ts);
+  return `${String(d.getHours()).padStart(2, "0")}:${String(
+    d.getMinutes(),
+  ).padStart(2, "0")}`;
+}
+
+function RoomItem({
+  room,
+  active,
+  onClick,
+}: {
+  room: Room;
+  active: boolean;
+  onClick: () => void;
+}) {
+  return (
+    <UnstyledButton
+      onClick={onClick}
+      p="xs"
+      style={{
+        borderRadius: "var(--mantine-radius-md)",
+        backgroundColor: active
+          ? "var(--mantine-color-dark-6)"
+          : "transparent",
+      }}
+    >
+      <Group gap="sm" wrap="nowrap">
+        <Avatar radius="md" size={42} color={active ? "brand" : "gray"}>
+          {initials(room.name)}
+        </Avatar>
+        <Box style={{ flex: 1, minWidth: 0 }}>
+          <Group justify="space-between" gap={4} wrap="nowrap">
+            <Group gap={4} wrap="nowrap" style={{ minWidth: 0 }}>
+              {room.encrypted ? (
+                <IconLock size={13} style={{ flexShrink: 0, opacity: 0.6 }} />
+              ) : (
+                <IconHash size={13} style={{ flexShrink: 0, opacity: 0.6 }} />
+              )}
+              <Text size="sm" fw={600} truncate>
+                {room.name}
+              </Text>
+            </Group>
+            <Text size="xs" c="dimmed" style={{ flexShrink: 0 }}>
+              {timeShort(room.lastTs)}
+            </Text>
+          </Group>
+          <Group justify="space-between" gap={4} wrap="nowrap">
+            <Text size="xs" c="dimmed" truncate>
+              {room.lastMessage}
+            </Text>
+            {room.unread > 0 && (
+              <Badge size="sm" circle variant="filled" color="brand">
+                {room.unread}
+              </Badge>
+            )}
+          </Group>
+        </Box>
+      </Group>
+    </UnstyledButton>
+  );
+}
+
+export function Sidebar({
+  user,
+  rooms,
+  activeId,
+  onSelect,
+  onLogout,
+}: {
+  user: User;
+  rooms: Room[];
+  activeId: string;
+  onSelect: (id: string) => void;
+  onLogout: () => void;
+}) {
+  const [q, setQ] = useState("");
+  const query = q.trim().toLowerCase();
+  const filtered = query
+    ? rooms.filter(
+        (r) =>
+          r.name.toLowerCase().includes(query) ||
+          r.messages.some((m) => m.body.toLowerCase().includes(query)),
+      )
+    : rooms;
+
+  return (
+    <Stack h="100%" gap={0}>
+      <Group justify="space-between" px="sm" py="xs" wrap="nowrap">
+        <Group gap="xs" wrap="nowrap" style={{ minWidth: 0 }}>
+          <Avatar radius="xl" size={34} color="brand">
+            {initials(user.handle)}
+          </Avatar>
+          <Text fw={600} size="sm" truncate>
+            {user.handle}
+          </Text>
+        </Group>
+        <Menu position="bottom-end" withinPortal>
+          <Menu.Target>
+            <UnstyledButton c="dimmed">
+              <IconDots size={18} />
+            </UnstyledButton>
+          </Menu.Target>
+          <Menu.Dropdown>
+            <Menu.Item
+              leftSection={<IconLogout size={15} />}
+              onClick={onLogout}
+            >
+              Desconectar
+            </Menu.Item>
+          </Menu.Dropdown>
+        </Menu>
+      </Group>
+
+      <Box px="sm" pb="sm">
+        <TextInput
+          value={q}
+          onChange={(e) => setQ(e.currentTarget.value)}
+          placeholder="Buscar rooms, usuarios, mensajes…"
+          leftSection={<IconSearch size={16} />}
+          radius="md"
+          size="sm"
+        />
+      </Box>
+      <Divider color="dark.4" />
+
+      <ScrollArea style={{ flex: 1 }} type="scroll">
+        <Stack gap={2} p={6}>
+          {filtered.map((room) => (
+            <RoomItem
+              key={room.id}
+              room={room}
+              active={room.id === activeId}
+              onClick={() => onSelect(room.id)}
+            />
+          ))}
+          {filtered.length === 0 && (
+            <Text c="dimmed" size="sm" ta="center" mt="md">
+              Sin resultados
+            </Text>
+          )}
+        </Stack>
+      </ScrollArea>
+    </Stack>
+  );
+}

web/src/api.ts

@@ -1,99 +0,0 @@
-// GatewayClient is the SPA's typed wrapper over the unibus gateway HTTP API.
-// Every method is a thin fetch against the gateway, which hosts one real Go bus
-// peer per name and performs all NATS + end-to-end crypto on the browser's
-// behalf. The base URL is chosen at runtime on the connect screen.
-import type { BusEvent, Member, Peer, Room } from "./types";
-
-export class GatewayClient {
-  constructor(public readonly baseURL: string) {
-    // Normalize: drop a trailing slash so `${base}/api/...` never doubles up.
-    this.baseURL = baseURL.replace(/\/+$/, "");
-  }
-
-  private async req<T>(method: string, path: string, body?: unknown): Promise<T> {
-    const res = await fetch(this.baseURL + path, {
-      method,
-      headers: body !== undefined ? { "Content-Type": "application/json" } : undefined,
-      body: body !== undefined ? JSON.stringify(body) : undefined,
-    });
-    const text = await res.text();
-    if (!res.ok) {
-      let msg = text;
-      try {
-        const j = JSON.parse(text);
-        if (j && typeof j.error === "string") msg = j.error;
-      } catch {
-        // not JSON: keep the raw text
-      }
-      throw new Error(msg || `HTTP ${res.status}`);
-    }
-    return (text ? JSON.parse(text) : {}) as T;
-  }
-
-  // connect creates (or recovers) the named peer on the gateway and returns its
-  // public identity. The identity persists across gateway restarts.
-  connect(name: string): Promise<Peer> {
-    return this.req<Peer>("POST", "/api/peer", { name });
-  }
-
-  // peers lists every peer currently hosted by the gateway (for the invite picker
-  // and to label senders by name).
-  peers(): Promise<Peer[]> {
-    return this.req<Peer[]>("GET", "/api/peers");
-  }
-
-  // rooms lists the rooms the named peer knows (created or joined).
-  rooms(peer: string): Promise<Room[]> {
-    return this.req<Room[]>("GET", `/api/rooms?peer=${encodeURIComponent(peer)}`);
-  }
-
-  // members lists the participants of a room.
-  members(roomID: string): Promise<Member[]> {
-    return this.req<Member[]>("GET", `/api/members?room_id=${encodeURIComponent(roomID)}`);
-  }
-
-  // createRoom opens a room on the given subject. encrypt drives both E2E
-  // encryption and per-message signing; the peer is auto-subscribed.
-  createRoom(peer: string, subject: string, encrypt: boolean): Promise<Room & { persist: boolean }> {
-    return this.req("POST", "/api/room", { peer, subject, encrypt, persist: false });
-  }
-
-  // join subscribes the peer to an existing room (must have been invited first
-  // when the room is encrypted).
-  join(peer: string, roomID: string): Promise<{ subject: string; encrypt: boolean }> {
-    return this.req("POST", "/api/join", { peer, room_id: roomID });
-  }
-
-  // invite adds another connected peer (by name) to a room, sealing the room key
-  // to it. Caller must be the room owner.
-  invite(peer: string, roomID: string, target: string): Promise<{ status: string }> {
-    return this.req("POST", "/api/invite", { peer, room_id: roomID, target });
-  }
-
-  // publish sends a text message to a room.
-  publish(peer: string, roomID: string, text: string): Promise<{ status: string }> {
-    return this.req("POST", "/api/publish", { peer, room_id: roomID, text });
-  }
-
-  // kick removes a peer (by name) from a room and rotates the key (forward
-  // secrecy). Caller must be the room owner.
-  kick(peer: string, roomID: string, target: string): Promise<{ status: string }> {
-    return this.req("POST", "/api/kick", { peer, room_id: roomID, target });
-  }
-
-  // stream opens the SSE channel for a peer. onEvent fires for each received bus
-  // message; onError fires if the stream drops. Returns the EventSource so the
-  // caller can close it.
-  stream(peer: string, onEvent: (ev: BusEvent) => void, onError?: () => void): EventSource {
-    const es = new EventSource(`${this.baseURL}/api/stream?peer=${encodeURIComponent(peer)}`);
-    es.onmessage = (e) => {
-      try {
-        onEvent(JSON.parse(e.data) as BusEvent);
-      } catch {
-        // ignore malformed frames (keepalive comments never reach onmessage)
-      }
-    };
-    if (onError) es.onerror = onError;
-    return es;
-  }
-}

web/src/components/ChatLayout.tsx

@@ -1,285 +0,0 @@
-import { useCallback, useEffect, useMemo, useRef, useState } from "react";
-import {
-  AppShell,
-  Group,
-  Title,
-  Badge,
-  Button,
-  CopyButton,
-  Tooltip,
-  ActionIcon,
-  ThemeIcon,
-  Alert,
-  Transition,
-} from "@mantine/core";
-import {
-  IconBolt,
-  IconLogout,
-  IconCopy,
-  IconCheck,
-  IconAlertTriangle,
-} from "@tabler/icons-react";
-import { GatewayClient } from "../api";
-import type { Member, Message, Peer, Room } from "../types";
-import { RoomList } from "./RoomList";
-import { MessagePane } from "./MessagePane";
-import { MembersPane } from "./MembersPane";
-
-interface Props {
-  client: GatewayClient;
-  peer: Peer;
-  onDisconnect: () => void;
-}
-
-// short renders the first 10 chars of an endpoint id, enough to disambiguate.
-export function short(endpoint: string): string {
-  return endpoint.length > 12 ? endpoint.slice(0, 10) + "…" : endpoint;
-}
-
-// ChatLayout owns all chat state: the peer's rooms, the active room, the
-// per-room message log fed by the SSE stream, the directory of connected peers
-// (to label senders and pick invitees), and the active room's member list. Every
-// bus action goes through the gateway client.
-export function ChatLayout({ client, peer, onDisconnect }: Props) {
-  const [rooms, setRooms] = useState<Room[]>([]);
-  const [activeRoom, setActiveRoom] = useState<string | null>(null);
-  const [messages, setMessages] = useState<Record<string, Message[]>>({});
-  const [peers, setPeers] = useState<Peer[]>([]);
-  const [members, setMembers] = useState<Member[]>([]);
-  const [error, setError] = useState<string | null>(null);
-  const seq = useRef(0);
-
-  const fail = useCallback((e: unknown) => {
-    setError(e instanceof Error ? e.message : String(e));
-  }, []);
-
-  // ---- data refreshers ----------------------------------------------------
-
-  const refreshRooms = useCallback(async () => {
-    try {
-      setRooms(await client.rooms(peer.name));
-    } catch (e) {
-      fail(e);
-    }
-  }, [client, peer.name, fail]);
-
-  const refreshPeers = useCallback(async () => {
-    try {
-      setPeers(await client.peers());
-    } catch (e) {
-      fail(e);
-    }
-  }, [client, fail]);
-
-  const refreshMembers = useCallback(
-    async (roomID: string) => {
-      try {
-        setMembers(await client.members(roomID));
-      } catch (e) {
-        fail(e);
-      }
-    },
-    [client, fail],
-  );
-
-  // ---- live stream (SSE) --------------------------------------------------
-
-  useEffect(() => {
-    const es = client.stream(
-      peer.name,
-      (ev) => {
-        seq.current += 1;
-        const msg: Message = { ...ev, id: `${ev.ts}-${seq.current}` };
-        setMessages((prev) => {
-          const list = prev[ev.room_id] ?? [];
-          return { ...prev, [ev.room_id]: [...list, msg] };
-        });
-      },
-      () => setError("Se perdió la conexión con el gateway (stream SSE)"),
-    );
-    return () => es.close();
-  }, [client, peer.name]);
-
-  // Initial load.
-  useEffect(() => {
-    refreshRooms();
-    refreshPeers();
-  }, [refreshRooms, refreshPeers]);
-
-  // Refresh members whenever the active room changes.
-  useEffect(() => {
-    if (activeRoom) refreshMembers(activeRoom);
-    else setMembers([]);
-  }, [activeRoom, refreshMembers]);
-
-  // ---- actions ------------------------------------------------------------
-
-  const onCreateRoom = useCallback(
-    async (subject: string, encrypt: boolean) => {
-      try {
-        const r = await client.createRoom(peer.name, subject, encrypt);
-        await refreshRooms();
-        setActiveRoom(r.room_id);
-      } catch (e) {
-        fail(e);
-      }
-    },
-    [client, peer.name, refreshRooms, fail],
-  );
-
-  const onJoinRoom = useCallback(
-    async (roomID: string) => {
-      try {
-        await client.join(peer.name, roomID);
-        await refreshRooms();
-        setActiveRoom(roomID);
-      } catch (e) {
-        fail(e);
-      }
-    },
-    [client, peer.name, refreshRooms, fail],
-  );
-
-  const onInvite = useCallback(
-    async (target: string) => {
-      if (!activeRoom) return;
-      try {
-        await client.invite(peer.name, activeRoom, target);
-        await refreshMembers(activeRoom);
-      } catch (e) {
-        fail(e);
-      }
-    },
-    [client, peer.name, activeRoom, refreshMembers, fail],
-  );
-
-  const onKick = useCallback(
-    async (target: string) => {
-      if (!activeRoom) return;
-      try {
-        await client.kick(peer.name, activeRoom, target);
-        await refreshMembers(activeRoom);
-      } catch (e) {
-        fail(e);
-      }
-    },
-    [client, peer.name, activeRoom, refreshMembers, fail],
-  );
-
-  const onPublish = useCallback(
-    async (text: string) => {
-      if (!activeRoom) return;
-      try {
-        await client.publish(peer.name, activeRoom, text);
-      } catch (e) {
-        fail(e);
-      }
-    },
-    [client, peer.name, activeRoom, fail],
-  );
-
-  // endpoint -> display name, using the peer directory; falls back to a short id.
-  const nameFor = useMemo(() => {
-    const byEndpoint = new Map(peers.map((p) => [p.endpoint_id, p.name]));
-    return (endpoint: string) =>
-      endpoint === peer.endpoint_id ? peer.name : byEndpoint.get(endpoint) ?? short(endpoint);
-  }, [peers, peer]);
-
-  const activeRoomObj = rooms.find((r) => r.room_id === activeRoom) ?? null;
-  const iAmOwner = members.some((m) => m.endpoint === peer.endpoint_id && m.role === "owner");
-
-  return (
-    <AppShell
-      header={{ height: 60 }}
-      navbar={{ width: 300, breakpoint: "sm" }}
-      aside={{ width: 300, breakpoint: "md", collapsed: { desktop: !activeRoom, mobile: true } }}
-      padding={0}
-    >
-      <AppShell.Header>
-        <Group h="100%" px="md" justify="space-between" wrap="nowrap">
-          <Group gap="xs" wrap="nowrap">
-            <ThemeIcon variant="light" color="violet" radius="md">
-              <IconBolt size={18} />
-            </ThemeIcon>
-            <Title order={4}>unibus</Title>
-          </Group>
-          <Group gap="xs" wrap="nowrap">
-            <Badge variant="light" color="violet" size="lg">
-              {peer.name}
-            </Badge>
-            <CopyButton value={peer.endpoint_id}>
-              {({ copied, copy }) => (
-                <Tooltip label={copied ? "¡copiado!" : peer.endpoint_id} withArrow>
-                  <ActionIcon variant="subtle" color="gray" onClick={copy}>
-                    {copied ? <IconCheck size={16} /> : <IconCopy size={16} />}
-                  </ActionIcon>
-                </Tooltip>
-              )}
-            </CopyButton>
-            <Button
-              variant="subtle"
-              color="gray"
-              leftSection={<IconLogout size={16} />}
-              onClick={onDisconnect}
-            >
-              Salir
-            </Button>
-          </Group>
-        </Group>
-      </AppShell.Header>
-
-      <AppShell.Navbar>
-        <RoomList
-          rooms={rooms}
-          activeRoom={activeRoom}
-          onSelect={setActiveRoom}
-          onCreateRoom={onCreateRoom}
-          onJoinRoom={onJoinRoom}
-        />
-      </AppShell.Navbar>
-
-      <AppShell.Main h="100vh">
-        {error && (
-          <Transition mounted={!!error} transition="slide-down">
-            {(styles) => (
-              <Alert
-                style={{ ...styles, position: "absolute", top: 70, left: "50%", transform: "translateX(-50%)", zIndex: 200, minWidth: 360 }}
-                color="red"
-                variant="filled"
-                icon={<IconAlertTriangle size={18} />}
-                withCloseButton
-                onClose={() => setError(null)}
-                title="Error"
-              >
-                {error}
-              </Alert>
-            )}
-          </Transition>
-        )}
-        <MessagePane
-          room={activeRoomObj}
-          messages={activeRoom ? messages[activeRoom] ?? [] : []}
-          myEndpoint={peer.endpoint_id}
-          nameFor={nameFor}
-          onPublish={onPublish}
-        />
-      </AppShell.Main>
-
-      <AppShell.Aside>
-        {activeRoomObj && (
-          <MembersPane
-            room={activeRoomObj}
-            members={members}
-            peers={peers}
-            myEndpoint={peer.endpoint_id}
-            iAmOwner={iAmOwner}
-            nameFor={nameFor}
-            onInvite={onInvite}
-            onKick={onKick}
-            onRefresh={() => activeRoom && refreshMembers(activeRoom)}
-          />
-        )}
-      </AppShell.Aside>
-    </AppShell>
-  );
-}

web/src/components/ConnectScreen.tsx

@@ -1,116 +0,0 @@
-import { useState } from "react";
-import {
-  Button,
-  Card,
-  Center,
-  Group,
-  Stack,
-  Text,
-  TextInput,
-  Title,
-  Alert,
-  ThemeIcon,
-} from "@mantine/core";
-import { IconBolt, IconPlugConnected, IconAlertTriangle } from "@tabler/icons-react";
-import { GatewayClient } from "../api";
-import type { Peer } from "../types";
-
-const LS_GATEWAY = "unibus.gateway";
-const LS_PEER = "unibus.peer";
-
-interface Props {
-  onConnect: (client: GatewayClient, peer: Peer) => void;
-}
-
-// ConnectScreen asks for the gateway URL and the identity (peer name) to connect
-// as. Both persist in localStorage so a reload reconnects with one click. The
-// gateway hosts the real Go bus peer; the browser only drives it.
-export function ConnectScreen({ onConnect }: Props) {
-  const [gateway, setGateway] = useState(
-    () => localStorage.getItem(LS_GATEWAY) ?? "http://localhost:7700",
-  );
-  const [name, setName] = useState(() => localStorage.getItem(LS_PEER) ?? "");
-  const [busy, setBusy] = useState(false);
-  const [error, setError] = useState<string | null>(null);
-
-  const connect = async () => {
-    const trimmed = name.trim();
-    if (!trimmed) {
-      setError("Elige un nombre de identidad");
-      return;
-    }
-    setBusy(true);
-    setError(null);
-    try {
-      const client = new GatewayClient(gateway.trim());
-      const peer = await client.connect(trimmed);
-      localStorage.setItem(LS_GATEWAY, client.baseURL);
-      localStorage.setItem(LS_PEER, trimmed);
-      onConnect(client, peer);
-    } catch (e) {
-      setError(e instanceof Error ? e.message : String(e));
-    } finally {
-      setBusy(false);
-    }
-  };
-
-  return (
-    <Center h="100vh" p="md">
-      <Card withBorder shadow="md" radius="lg" p="xl" w={420} maw="100%">
-        <Stack gap="lg">
-          <Group gap="sm">
-            <ThemeIcon size="xl" radius="md" variant="light" color="violet">
-              <IconBolt size={26} />
-            </ThemeIcon>
-            <div>
-              <Title order={3}>unibus</Title>
-              <Text size="sm" c="dimmed">
-                chat cifrado extremo a extremo sobre NATS
-              </Text>
-            </div>
-          </Group>
-
-          <TextInput
-            label="Gateway"
-            description="URL del gateway web de unibus"
-            placeholder="http://localhost:7700"
-            value={gateway}
-            onChange={(e) => setGateway(e.currentTarget.value)}
-            disabled={busy}
-          />
-          <TextInput
-            label="Identidad"
-            description="Tu nombre de peer en el bus (persistente)"
-            placeholder="ana"
-            value={name}
-            onChange={(e) => setName(e.currentTarget.value)}
-            onKeyDown={(e) => e.key === "Enter" && connect()}
-            disabled={busy}
-            data-autofocus
-          />
-
-          {error && (
-            <Alert
-              color="red"
-              variant="light"
-              icon={<IconAlertTriangle size={18} />}
-              title="No se pudo conectar"
-            >
-              {error}
-            </Alert>
-          )}
-
-          <Button
-            leftSection={<IconPlugConnected size={18} />}
-            onClick={connect}
-            loading={busy}
-            fullWidth
-            size="md"
-          >
-            Conectar
-          </Button>
-        </Stack>
-      </Card>
-    </Center>
-  );
-}

web/src/components/MembersPane.tsx

@@ -1,153 +0,0 @@
-import { useState } from "react";
-import {
-  Stack,
-  Group,
-  Text,
-  Badge,
-  Select,
-  Button,
-  ActionIcon,
-  Divider,
-  Box,
-  Avatar,
-  Tooltip,
-  ScrollArea,
-} from "@mantine/core";
-import { IconUserPlus, IconUserMinus, IconRefresh, IconUsers } from "@tabler/icons-react";
-import type { Member, Peer, Room } from "../types";
-
-interface Props {
-  room: Room;
-  members: Member[];
-  peers: Peer[];
-  myEndpoint: string;
-  iAmOwner: boolean;
-  nameFor: (endpoint: string) => string;
-  onInvite: (target: string) => void;
-  onKick: (target: string) => void;
-  onRefresh: () => void;
-}
-
-// MembersPane is the right column: who is in the active room, plus invite (pick a
-// connected peer) and kick (owner only). Invite/kick address peers by name; the
-// gateway resolves the name to its bus endpoint.
-export function MembersPane({
-  room,
-  members,
-  peers,
-  myEndpoint,
-  iAmOwner,
-  nameFor,
-  onInvite,
-  onKick,
-  onRefresh,
-}: Props) {
-  const [target, setTarget] = useState<string | null>(null);
-
-  const memberEndpoints = new Set(members.map((m) => m.endpoint));
-  // Candidates to invite: connected peers not already in the room.
-  const candidates = peers
-    .filter((p) => !memberEndpoints.has(p.endpoint_id))
-    .map((p) => ({ value: p.name, label: p.name }));
-
-  const invite = () => {
-    if (target) {
-      onInvite(target);
-      setTarget(null);
-    }
-  };
-
-  return (
-    <Stack gap={0} h="100%">
-      <Group justify="space-between" px="md" py="sm" wrap="nowrap" style={{ borderBottom: "1px solid var(--mantine-color-default-border)" }}>
-        <Group gap="xs">
-          <IconUsers size={18} />
-          <Text fw={600}>Miembros</Text>
-          <Badge size="sm" variant="light">
-            {members.length}
-          </Badge>
-        </Group>
-        <Tooltip label="Recargar" withArrow>
-          <ActionIcon variant="subtle" color="gray" onClick={onRefresh}>
-            <IconRefresh size={16} />
-          </ActionIcon>
-        </Tooltip>
-      </Group>
-
-      <Box p="md">
-        <Text size="xs" fw={700} c="dimmed" tt="uppercase" mb="xs">
-          Invitar {room.encrypt && "(reparte la clave)"}
-        </Text>
-        <Group gap="xs" wrap="nowrap" align="flex-end">
-          <Select
-            style={{ flex: 1 }}
-            size="xs"
-            placeholder="peer conectado"
-            data={candidates}
-            value={target}
-            onChange={setTarget}
-            searchable
-            nothingFoundMessage="sin peers libres"
-            comboboxProps={{ withinPortal: true }}
-          />
-          <Button
-            size="xs"
-            leftSection={<IconUserPlus size={14} />}
-            onClick={invite}
-            disabled={!target}
-          >
-            Invitar
-          </Button>
-        </Group>
-      </Box>
-
-      <Divider />
-
-      <ScrollArea style={{ flex: 1 }}>
-        <Stack gap={4} p="md">
-          {members.map((m) => {
-            const isMe = m.endpoint === myEndpoint;
-            const name = nameFor(m.endpoint);
-            const canKick = iAmOwner && !isMe && m.role !== "owner";
-            return (
-              <Group key={m.endpoint} justify="space-between" wrap="nowrap" gap="xs">
-                <Group gap="xs" wrap="nowrap" style={{ minWidth: 0 }}>
-                  <Avatar size="sm" radius="xl" color="violet">
-                    {name.slice(0, 2).toUpperCase()}
-                  </Avatar>
-                  <Box style={{ minWidth: 0 }}>
-                    <Text size="sm" fw={isMe ? 700 : 500} truncate>
-                      {name} {isMe && "(tú)"}
-                    </Text>
-                    <Text size="9px" c="dimmed" truncate>
-                      {m.endpoint}
-                    </Text>
-                  </Box>
-                </Group>
-                <Group gap={4} wrap="nowrap">
-                  {m.role === "owner" && (
-                    <Badge size="xs" color="yellow" variant="light">
-                      owner
-                    </Badge>
-                  )}
-                  {canKick && (
-                    <Tooltip label="Expulsar (rota la clave)" withArrow>
-                      <ActionIcon
-                        variant="subtle"
-                        color="red"
-                        size="sm"
-                        onClick={() => onKick(name)}
-                      >
-                        <IconUserMinus size={15} />
-                      </ActionIcon>
-                    </Tooltip>
-                  )}
-                </Group>
-              </Group>
-            );
-          })}
-        </Stack>
-      </ScrollArea>
-    </Stack>
-  );
-}

web/src/components/MessagePane.tsx

@@ -1,153 +0,0 @@
-import { useEffect, useRef, useState } from "react";
-import {
-  Stack,
-  Group,
-  Text,
-  Badge,
-  Paper,
-  ScrollArea,
-  TextInput,
-  ActionIcon,
-  Center,
-  ThemeIcon,
-  Box,
-  CopyButton,
-  Tooltip,
-} from "@mantine/core";
-import {
-  IconLock,
-  IconHash,
-  IconSend,
-  IconMessages,
-  IconCopy,
-  IconCheck,
-} from "@tabler/icons-react";
-import type { Message, Room } from "../types";
-
-interface Props {
-  room: Room | null;
-  messages: Message[];
-  myEndpoint: string;
-  nameFor: (endpoint: string) => string;
-  onPublish: (text: string) => void;
-}
-
-// formatTime renders a message timestamp as HH:mm:ss in 24h European style.
-function formatTime(ts: number): string {
-  return new Date(ts).toLocaleTimeString("es-ES", {
-    hour: "2-digit",
-    minute: "2-digit",
-    second: "2-digit",
-  });
-}
-
-// MessagePane is the center column: the active room's live message log plus the
-// composer. Own messages align right; others align left and show the sender.
-export function MessagePane({ room, messages, myEndpoint, nameFor, onPublish }: Props) {
-  const [text, setText] = useState("");
-  const viewport = useRef<HTMLDivElement>(null);
-
-  // Auto-scroll to the newest message.
-  useEffect(() => {
-    viewport.current?.scrollTo({ top: viewport.current.scrollHeight, behavior: "smooth" });
-  }, [messages.length]);
-
-  if (!room) {
-    return (
-      <Center h="100%">
-        <Stack align="center" gap="xs">
-          <ThemeIcon size={64} radius="xl" variant="light" color="gray">
-            <IconMessages size={34} />
-          </ThemeIcon>
-          <Text c="dimmed">Elige o crea una room para empezar a chatear</Text>
-        </Stack>
-      </Center>
-    );
-  }
-
-  const send = () => {
-    const t = text.trim();
-    if (t) {
-      onPublish(t);
-      setText("");
-    }
-  };
-
-  return (
-    <Stack gap={0} h="100%">
-      <Group justify="space-between" px="md" py="sm" wrap="nowrap" style={{ borderBottom: "1px solid var(--mantine-color-default-border)" }}>
-        <Group gap="xs" wrap="nowrap">
-          {room.encrypt ? <IconLock size={18} /> : <IconHash size={18} />}
-          <Text fw={600}>{room.subject}</Text>
-          {room.encrypt && (
-            <Badge size="sm" color="teal" variant="light">
-              cifrada E2E
-            </Badge>
-          )}
-        </Group>
-        <CopyButton value={room.room_id}>
-          {({ copied, copy }) => (
-            <Tooltip label={copied ? "¡copiado!" : "copiar room id"} withArrow>
-              <ActionIcon variant="subtle" color="gray" onClick={copy}>
-                {copied ? <IconCheck size={16} /> : <IconCopy size={16} />}
-              </ActionIcon>
-            </Tooltip>
-          )}
-        </CopyButton>
-      </Group>
-
-      <ScrollArea style={{ flex: 1 }} viewportRef={viewport} p="md">
-        <Stack gap="sm">
-          {messages.length === 0 && (
-            <Text c="dimmed" ta="center" py="xl" size="sm">
-              No hay mensajes todavía.
-            </Text>
-          )}
-          {messages.map((m) => {
-            const mine = m.sender === myEndpoint;
-            return (
-              <Box
-                key={m.id}
-                style={{ display: "flex", justifyContent: mine ? "flex-end" : "flex-start" }}
-              >
-                <Paper
-                  withBorder
-                  shadow="xs"
-                  radius="md"
-                  p="xs"
-                  bg={mine ? "violet.9" : undefined}
-                  maw="75%"
-                >
-                  {!mine && (
-                    <Text size="xs" fw={700} c="violet.4">
-                      {nameFor(m.sender)}
-                    </Text>
-                  )}
-                  <Text size="sm" style={{ wordBreak: "break-word", whiteSpace: "pre-wrap" }}>
-                    {m.text}
-                  </Text>
-                  <Text size="9px" c="dimmed" ta="right" mt={2}>
-                    {formatTime(m.ts)}
-                  </Text>
-                </Paper>
-              </Box>
-            );
-          })}
-        </Stack>
-      </ScrollArea>
-
-      <Group p="md" gap="xs" wrap="nowrap" style={{ borderTop: "1px solid var(--mantine-color-default-border)" }}>
-        <TextInput
-          style={{ flex: 1 }}
-          placeholder={`Mensaje a ${room.subject}…`}
-          value={text}
-          onChange={(e) => setText(e.currentTarget.value)}
-          onKeyDown={(e) => e.key === "Enter" && send()}
-        />
-        <ActionIcon size="lg" onClick={send} disabled={!text.trim()}>
-          <IconSend size={18} />
-        </ActionIcon>
-      </Group>
-    </Stack>
-  );
-}

web/src/components/RoomList.tsx

@@ -1,119 +0,0 @@
-import { useState } from "react";
-import {
-  Stack,
-  TextInput,
-  Checkbox,
-  Button,
-  Divider,
-  Text,
-  NavLink,
-  ScrollArea,
-  Group,
-  Box,
-} from "@mantine/core";
-import { IconLock, IconHash, IconPlus, IconDoorEnter } from "@tabler/icons-react";
-import type { Room } from "../types";
-
-interface Props {
-  rooms: Room[];
-  activeRoom: string | null;
-  onSelect: (roomID: string) => void;
-  onCreateRoom: (subject: string, encrypt: boolean) => void;
-  onJoinRoom: (roomID: string) => void;
-}
-
-// RoomList is the navbar: create a room, join one by id, and pick the active
-// room from the peer's known rooms.
-export function RoomList({ rooms, activeRoom, onSelect, onCreateRoom, onJoinRoom }: Props) {
-  const [subject, setSubject] = useState("room.general");
-  const [encrypt, setEncrypt] = useState(true);
-  const [joinID, setJoinID] = useState("");
-
-  const create = () => {
-    if (subject.trim()) onCreateRoom(subject.trim(), encrypt);
-  };
-  const join = () => {
-    if (joinID.trim()) {
-      onJoinRoom(joinID.trim());
-      setJoinID("");
-    }
-  };
-
-  return (
-    <Stack gap={0} h="100%">
-      <Box p="md">
-        <Text size="xs" fw={700} c="dimmed" tt="uppercase" mb="xs">
-          Crear room
-        </Text>
-        <Stack gap="xs">
-          <TextInput
-            size="xs"
-            placeholder="subject (room.general)"
-            leftSection={<IconHash size={14} />}
-            value={subject}
-            onChange={(e) => setSubject(e.currentTarget.value)}
-            onKeyDown={(e) => e.key === "Enter" && create()}
-          />
-          <Checkbox
-            size="xs"
-            label="Cifrado extremo a extremo"
-            checked={encrypt}
-            onChange={(e) => setEncrypt(e.currentTarget.checked)}
-          />
-          <Button size="xs" leftSection={<IconPlus size={14} />} onClick={create}>
-            Crear
-          </Button>
-        </Stack>
-      </Box>
-
-      <Divider />
-
-      <Box p="md">
-        <Text size="xs" fw={700} c="dimmed" tt="uppercase" mb="xs">
-          Unirse por id
-        </Text>
-        <Group gap="xs" wrap="nowrap">
-          <TextInput
-            size="xs"
-            placeholder="room id"
-            value={joinID}
-            onChange={(e) => setJoinID(e.currentTarget.value)}
-            onKeyDown={(e) => e.key === "Enter" && join()}
-            style={{ flex: 1 }}
-          />
-          <Button size="xs" variant="light" onClick={join} px="sm">
-            <IconDoorEnter size={16} />
-          </Button>
-        </Group>
-      </Box>
-
-      <Divider />
-
-      <Text size="xs" fw={700} c="dimmed" tt="uppercase" px="md" pt="md" pb="xs">
-        Rooms ({rooms.length})
-      </Text>
-      <ScrollArea style={{ flex: 1 }}>
-        <Stack gap={2} px="xs" pb="md">
-          {rooms.length === 0 && (
-            <Text size="sm" c="dimmed" px="sm" py="lg" ta="center">
-              Aún no hay rooms. Crea o únete a una.
-            </Text>
-          )}
-          {rooms.map((r) => (
-            <NavLink
-              key={r.room_id}
-              active={r.room_id === activeRoom}
-              onClick={() => onSelect(r.room_id)}
-              label={r.subject}
-              description={r.room_id.slice(0, 14) + "…"}
-              leftSection={
-                r.encrypt ? <IconLock size={16} /> : <IconHash size={16} />
-              }
-              variant="filled"
-            />
-          ))}
-        </Stack>
-      </ScrollArea>
-    </Stack>
-  );
-}

web/src/main.tsx

@@ -1,14 +1,14 @@
-import React from "react";
-import ReactDOM from "react-dom/client";
+import { StrictMode } from "react";
+import { createRoot } from "react-dom/client";
 import { MantineProvider } from "@mantine/core";
 import "@mantine/core/styles.css";
 import { theme } from "./theme";
 import { App } from "./App";
 
-ReactDOM.createRoot(document.getElementById("root")!).render(
-  <React.StrictMode>
-    <MantineProvider theme={theme} defaultColorScheme="dark">
+createRoot(document.getElementById("root")!).render(
+  <StrictMode>
+    <MantineProvider theme={theme} forceColorScheme="dark">
       <App />
     </MantineProvider>
-  </React.StrictMode>,
+  </StrictMode>,
 );

web/src/mock.ts

@@ -0,0 +1,59 @@
+import type { Room } from "./types";
+
+// Datos de muestra para iterar el diseño sin el bus conectado.
+const now = 1749300000000;
+const m = (n: number) => now - n * 60_000;
+
+export const MOCK_ROOMS: Room[] = [
+  {
+    id: "general",
+    name: "general",
+    encrypted: true,
+    lastMessage: "¿Lo desplegamos hoy?",
+    lastTs: m(2),
+    unread: 3,
+    messages: [
+      { id: "1", sender: "ana", body: "Buenas, ¿cómo va el cluster?", ts: m(40) },
+      { id: "2", sender: "lucas", body: "Los 3 nodos en R3, quorum verde", ts: m(38), mine: true },
+      { id: "3", sender: "ana", body: "Brutal. ¿Y el frontend?", ts: m(30) },
+      { id: "4", sender: "leo", body: "Primera iteración lista, estilo Element", ts: m(6) },
+      { id: "5", sender: "ana", body: "¿Lo desplegamos hoy?", ts: m(2) },
+    ],
+  },
+  {
+    id: "board",
+    name: "board · privado",
+    encrypted: true,
+    lastMessage: "Os paso el acta cifrada",
+    lastTs: m(95),
+    unread: 0,
+    messages: [
+      { id: "1", sender: "ceo", body: "Reunión a las 18:00", ts: m(120) },
+      { id: "2", sender: "lucas", body: "Anotado", ts: m(96), mine: true },
+      { id: "3", sender: "ceo", body: "Os paso el acta cifrada", ts: m(95) },
+    ],
+  },
+  {
+    id: "bots",
+    name: "bots",
+    encrypted: false,
+    lastMessage: "echo: ping",
+    lastTs: m(210),
+    unread: 0,
+    messages: [
+      { id: "1", sender: "lucas", body: "!ping", ts: m(212), mine: true },
+      { id: "2", sender: "echobot", body: "echo: ping", ts: m(210) },
+    ],
+  },
+  {
+    id: "infra",
+    name: "infra",
+    encrypted: true,
+    lastMessage: "magnus + homer + datardos OK",
+    lastTs: m(330),
+    unread: 1,
+    messages: [
+      { id: "1", sender: "leo", body: "magnus + homer + datardos OK", ts: m(330) },
+    ],
+  },
+];

web/src/theme.ts

@@ -1,14 +1,24 @@
-import { createTheme } from "@mantine/core";
+import { createTheme, type MantineColorsTuple } from "@mantine/core";
+
+// Acento de marca de unibus — un violeta-índigo moderno.
+const brand: MantineColorsTuple = [
+  "#f1edff",
+  "#dcd3ff",
+  "#b5a3f5",
+  "#8d70ed",
+  "#6c47e6",
+  "#5a2fe2",
+  "#5023e0",
+  "#4119c7",
+  "#3915b3",
+  "#2f0f9e",
+];
 
-// The unibus theme: a single accent color and a slightly tighter default radius.
-// Mantine generates all its CSS variables from this; the SPA never hand-writes
-// CSS or color literals.
 export const theme = createTheme({
-  primaryColor: "violet",
-  defaultRadius: "md",
+  primaryColor: "brand",
+  colors: { brand },
   fontFamily:
-    "Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif",
-  headings: {
-    fontWeight: "650",
-  },
+    "Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif",
+  defaultRadius: "md",
+  headings: { fontWeight: "650" },
 });

web/src/types.ts

@@ -1,41 +1,25 @@
-// Domain types shared across the SPA. They mirror the JSON the unibus gateway
-// (playground/server.go) returns; the browser never speaks NATS or crypto
-// directly — the Go peer behind the gateway does, so every type here is a plain
-// view of a gateway response.
+// Tipos de dominio de la UI. En la iteración 1 se llenan con datos mock;
+// más adelante vendrán del gateway (REST/SSE) que es un peer del bus.
 
-// Peer is a named identity hosted by the gateway. endpoint_id is the stable bus
-// endpoint (base64url of sha256(signPub)).
-export interface Peer {
-  name: string;
-  endpoint_id: string;
-}
-
-// Room is a channel the connected peer created or joined. encrypt true means the
-// payloads are sealed end-to-end with the room key.
-export interface Room {
-  room_id: string;
-  subject: string;
-  encrypt: boolean;
-}
-
-// Member is one participant of a room as reported by the control plane.
-export interface Member {
-  endpoint: string;
-  role: string;
-}
-
-// BusEvent is one Server-Sent Event delivered on /api/stream: a message a peer
-// received on one of its subscribed rooms, already decrypted by the Go peer.
-export interface BusEvent {
-  room_id: string;
-  subject: string;
-  sender: string;
-  text: string;
-  encrypted: boolean;
-  ts: number; // unix millis
-}
-
-// Message is a BusEvent enriched with a stable local id for React keys.
-export interface Message extends BusEvent {
+export interface User {
   id: string;
+  handle: string;
+}
+
+export interface Message {
+  id: string;
+  sender: string; // handle
+  body: string;
+  ts: number; // epoch ms
+  mine?: boolean;
+}
+
+export interface Room {
+  id: string;
+  name: string;
+  encrypted: boolean;
+  lastMessage: string;
+  lastTs: number;
+  unread: number;
+  messages: Message[];
 }

web/tsconfig.app.json

@@ -5,17 +5,16 @@
     "lib": ["ES2022", "DOM", "DOM.Iterable"],
     "module": "ESNext",
     "skipLibCheck": true,
-
     "moduleResolution": "bundler",
     "allowImportingTsExtensions": true,
+    "resolveJsonModule": true,
     "isolatedModules": true,
     "moduleDetection": "force",
     "noEmit": true,
     "jsx": "react-jsx",
-
     "strict": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
     "noFallthroughCasesInSwitch": true
   },
   "include": ["src"]

web/tsconfig.node.json

@@ -9,9 +9,7 @@
     "isolatedModules": true,
     "moduleDetection": "force",
     "noEmit": true,
-    "strict": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true
+    "strict": true
   },
   "include": ["vite.config.ts"]
 }

web/vite.config.ts

@@ -1,14 +1,7 @@
 import { defineConfig } from "vite";
 import react from "@vitejs/plugin-react";
 
-// The SPA talks to the unibus gateway over plain fetch + EventSource; the
-// gateway URL is chosen at runtime on the connect screen, so nothing is proxied
-// here. The dev server runs on a fixed port so the gateway's permissive CORS is
-// predictable.
 export default defineConfig({
   plugins: [react()],
-  server: {
-    port: 5173,
-    host: true,
-  },
+  server: { host: true, port: 5181 },
 });