diff --git a/.gitignore b/.gitignore
index f174b13..dc310c4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,6 +26,12 @@ android/app/build/
 *.keystore
 local.properties
 
+# --- Desktop (Compose for Desktop) ---
+desktop/.gradle/
+desktop/.kotlin/
+desktop/build/
+desktop/app/build/
+
 # --- IDE / OS ---
 .idea/
 .vscode/
diff --git a/desktop/app/build.gradle.kts b/desktop/app/build.gradle.kts
new file mode 100644
index 0000000..d310cb6
--- /dev/null
+++ b/desktop/app/build.gradle.kts
@@ -0,0 +1,91 @@
+plugins {
+    kotlin("jvm") version "2.0.21"
+    id("org.jetbrains.kotlin.plugin.compose") version "2.0.21"
+    id("org.jetbrains.compose") version "1.7.3"
+}
+
+group = "com.shonar"
+version = "0.1.0"
+
+repositories {
+    mavenCentral()
+    google()
+}
+
+kotlin {
+    jvmToolchain(17)
+}
+
+sourceSets {
+    main {
+        kotlin {
+            // Shared with the Android app: compile the portable sources
+            // directly (same files, no copies). Android-only files excluded.
+            // (Path is relative to this module: desktop/app.)
+            srcDir("../../android/app/src/main/java")
+            exclude(
+                "com/shonar/ShonarApplication.kt",
+                "com/shonar/MainActivity.kt",
+                // settings store impls are Android (DataStore/Keystore);
+                // desktop provides its own (desktopSettingsStore.kt).
+                "com/shonar/settings/SettingsStore.kt",
+                // recording: only AiContent.kt is portable.
+                "com/shonar/recording/MigrationRunner.kt",
+                "com/shonar/recording/RecordingDao.kt",
+                "com/shonar/recording/RecordingEntity.kt",
+                "com/shonar/recording/RecordingRepository.kt",
+                "com/shonar/recording/RecordingService.kt",
+                "com/shonar/recording/ShonarDatabase.kt",
+                "com/shonar/recording/SyncDrain.kt",
+                "com/shonar/recording/SyncSlots.kt",
+                "com/shonar/recording/SyncStateConverter.kt",
+                "com/shonar/recording/SyncWorker.kt",
+                // ui: only ui/folder/FolderList.kt is portable.
+                "com/shonar/ui/detail/**",
+                "com/shonar/ui/home/**",
+                "com/shonar/ui/provider/**",
+                "com/shonar/ui/settings/**",
+                "com/shonar/ui/theme/**",
+                "com/shonar/ui/folder/FolderBrowserScreen.kt",
+            )
+            srcDir("src/main/kotlin")
+        }
+    }
+    test {
+        kotlin {
+            srcDir("src/test/kotlin")
+        }
+    }
+}
+
+dependencies {
+    implementation(compose.desktop.currentOs)
+    implementation(compose.material3)
+    implementation(compose.materialIconsExtended)
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-swing:1.9.0")
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.7.3")
+    implementation("com.squareup.okhttp3:okhttp:4.12.0")
+    // Real org.json for JVM (Android stubs throw "not mocked").
+    implementation("org.json:json:20240303")
+
+    testImplementation("junit:junit:4.13.2")
+    testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.9.0")
+    testImplementation("com.squareup.okhttp3:mockwebserver:4.12.0")
+}
+
+compose.desktop {
+    application {
+        mainClass = "com.shonar.desktop.MainKt"
+        nativeDistributions {
+            targetFormats(org.jetbrains.compose.desktop.application.dsl.TargetFormat.Dmg)
+            targetFormats(org.jetbrains.compose.desktop.application.dsl.TargetFormat.Msi)
+            targetFormats(org.jetbrains.compose.desktop.application.dsl.TargetFormat.Deb)
+            packageName = "shonar-desktop"
+            packageVersion = "0.1.0"
+        }
+    }
+}
+
+tasks.withType<Test> {
+    useJUnit()
+}
diff --git a/desktop/app/src/main/kotlin/com/shonar/desktop/DesktopState.kt b/desktop/app/src/main/kotlin/com/shonar/desktop/DesktopState.kt
new file mode 100644
index 0000000..6e25fa1
--- /dev/null
+++ b/desktop/app/src/main/kotlin/com/shonar/desktop/DesktopState.kt
@@ -0,0 +1,515 @@
+package com.shonar.desktop
+
+import com.shonar.provider.AuthState
+import com.shonar.provider.CustomShonarProvider
+import com.shonar.provider.ProviderCredential
+import com.shonar.provider.ProviderError
+import com.shonar.provider.RecordingDraft
+import com.shonar.provider.ServerUrl
+import com.shonar.provider.ShonarAuthStore
+import com.shonar.provider.ShonarHandshake
+import com.shonar.recording.JobInfo
+import com.shonar.recording.ModelsData
+import com.shonar.recording.SummaryData
+import com.shonar.recording.TranscriptData
+import com.shonar.recording.parseJobs
+import com.shonar.recording.parseModels
+import com.shonar.recording.parseSummary
+import com.shonar.recording.parseTranscript
+import com.shonar.settings.FileSettingsStore
+import java.io.File
+import java.util.UUID
+import java.util.concurrent.TimeUnit
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.launch
+import okhttp3.OkHttpClient
+
+/**
+ * Desktop app state (Stage 3). Plain class + StateFlows — no ViewModel
+ * framework. Talks to the SHONAR backend through the *shared*
+ * [CustomShonarProvider] (same files the Android app compiles).
+ */
+class DesktopState(appDir: File = defaultAppDir()) {
+
+    enum class Screen { ENGINE, LIBRARY, DETAIL, SETTINGS }
+
+    /** Local transcription engine lifecycle (the bundled backend+worker). */
+    enum class EngineState { UNKNOWN, STARTING, RUNNING, STOPPED, FAILED }
+
+    data class LibraryEntry(
+        val file: File,
+        val hasReport: Boolean,
+    )
+
+    data class DetailUi(
+        val file: File,
+        /** "Use default" is null; otherwise the override model name. */
+        var overrideModel: String? = null,
+        var busy: String? = null,
+        var uploadProgress: Float? = null,
+        var remoteId: String? = null,
+        var jobs: List<JobInfo> = emptyList(),
+        var transcript: TranscriptData? = null,
+        var summary: SummaryData? = null,
+        var error: String? = null,
+    )
+
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
+
+    private val prefs = FileSettingsStore(File(appDir, "settings.json"))
+    private val authStore = ShonarAuthStore(FileSettingsStore(File(appDir, "auth.json")))
+
+    private val http = OkHttpClient.Builder()
+        .connectTimeout(15, TimeUnit.SECONDS)
+        .readTimeout(300, TimeUnit.SECONDS)
+        .writeTimeout(300, TimeUnit.SECONDS)
+        .build()
+
+    val provider = CustomShonarProvider(
+        auth = authStore,
+        sidecarRoot = File(appDir, "sidecars"),
+        client = http,
+        handshake = ShonarHandshake(http),
+        deviceName = "SHONAR Desktop",
+        platform = "desktop",
+    )
+
+    private val _screen = MutableStateFlow(Screen.LIBRARY)
+    val screen: StateFlow<Screen> = _screen.asStateFlow()
+
+    private val _serverUrl = MutableStateFlow("http://localhost:8000")
+    val serverUrl: StateFlow<String> = _serverUrl.asStateFlow()
+
+    private val _engine = MutableStateFlow(EngineState.UNKNOWN)
+    val engine: StateFlow<EngineState> = _engine.asStateFlow()
+
+    private val _engineError = MutableStateFlow<String?>(null)
+    val engineError: StateFlow<String?> = _engineError.asStateFlow()
+
+    private val _connected = MutableStateFlow(false)
+    val connected: StateFlow<Boolean> = _connected.asStateFlow()
+
+    private val _folder = MutableStateFlow<File?>(null)
+    val folder: StateFlow<File?> = _folder.asStateFlow()
+
+    private val _entries = MutableStateFlow<List<LibraryEntry>>(emptyList())
+    val entries: StateFlow<List<LibraryEntry>> = _entries.asStateFlow()
+
+    private val _models = MutableStateFlow<ModelsData?>(null)
+    val models: StateFlow<ModelsData?> = _models.asStateFlow()
+
+    private val _modelsError = MutableStateFlow<String?>(null)
+    val modelsError: StateFlow<String?> = _modelsError.asStateFlow()
+
+    private val _detail = MutableStateFlow<DetailUi?>(null)
+    val detail: StateFlow<DetailUi?> = _detail.asStateFlow()
+
+    private val _query = MutableStateFlow("")
+    val query: StateFlow<String> = _query.asStateFlow()
+
+    private val _searchResults = MutableStateFlow<List<SearchHit>>(emptyList())
+    val searchResults: StateFlow<List<SearchHit>> = _searchResults.asStateFlow()
+
+    private var pollJob: Job? = null
+
+    init {
+        scope.launch {
+            _serverUrl.value = prefs.getString(KEY_URL) ?: "http://localhost:8000"
+            prefs.getString(KEY_FOLDER)?.let { File(it).takeIf { it.isDirectory } }
+                ?.let { setFolder(it, silent = true) }
+            ensureReady()
+        }
+        Runtime.getRuntime().addShutdownHook(Thread { stopEngine() })
+    }
+
+    /**
+     * Startup chain, no questions asked: saved session → local account on a
+     * running engine → start the engine ourselves → engine screen on failure.
+     * There is deliberately no login UI: the desktop owns a local account
+     * (email + random password in its own settings file) that exists only
+     * to satisfy the engine's auth.
+     */
+    fun ensureReady() {
+        scope.launch {
+            if (runCatching { provider.reconnect() }.getOrNull() == AuthState.CONNECTED) {
+                onReady()
+                return@launch
+            }
+            if (engineUp()) {
+                if (provisionLocalAccount()) {
+                    onReady()
+                    return@launch
+                }
+            }
+            _engine.value = EngineState.STOPPED
+            _screen.value = Screen.ENGINE
+        }
+    }
+
+    private suspend fun onReady() {
+        _connected.value = true
+        refreshModels()
+        if (_screen.value == Screen.ENGINE) _screen.value = Screen.LIBRARY
+    }
+
+    private fun engineUp(): Boolean = runCatching {
+        java.net.URL("${_serverUrl.value}/api/v1/healthz").readText()
+            .contains("\"ok\"")
+    }.getOrDefault(false)
+
+    /** Register-or-login the private local account. True when connected. */
+    private suspend fun provisionLocalAccount(): Boolean {
+        val parsed = ServerUrl.parse(_serverUrl.value).getOrNull()
+        if (parsed == null) {
+            _engineError.value = "Engine address is not a valid URL."
+            return false
+        }
+        if (provider.probe(parsed) !is com.shonar.provider.ProbeResult.Compatible) {
+            _engineError.value = "Engine answered but doesn't look like SHONAR."
+            return false
+        }
+        var password = prefs.getString(KEY_PASSWORD)
+        if (password.isNullOrBlank()) {
+            password = UUID.randomUUID().toString() + UUID.randomUUID().toString()
+            prefs.putString(KEY_PASSWORD, password)
+        }
+        val cred = ProviderCredential.ShonarLogin(
+            accountLabel = LOCAL_EMAIL, serverUrl = parsed,
+            email = LOCAL_EMAIL, password = password,
+        )
+        if (runCatching { provider.connect(cred) }.isSuccess) return true
+        // Stored password is stale — register anew, then connect.
+        val registered = runCatching { registerLocalAccount(parsed, password) }.isSuccess
+        if (!registered) {
+            _engineError.value = "Engine is up but the local account was refused."
+            return false
+        }
+        return runCatching {
+            provider.connect(cred)
+            true
+        }.getOrElse {
+            _engineError.value = it.message ?: "Engine is up but sign-in failed."
+            false
+        }
+    }
+
+    private fun registerLocalAccount(base: ServerUrl, password: String) {
+        val body = """{"email":${jsonStr(LOCAL_EMAIL)},"password":${jsonStr(password)}}"""
+        val url = java.net.URL(base.origin + "/api/v1/auth/register")
+        (url.openConnection() as java.net.HttpURLConnection).apply {
+            requestMethod = "POST"
+            setRequestProperty("Content-Type", "application/json")
+            doOutput = true
+            outputStream.use { it.write(body.toByteArray()) }
+            if (responseCode != 201) throw IllegalStateException("register: HTTP $responseCode")
+        }.disconnect()
+    }
+
+    private fun jsonStr(raw: String): String = buildString {
+        append('"')
+        for (c in raw) when (c) {
+            '"' -> append("\\\"")
+            '\\' -> append("\\\\")
+            else -> append(c)
+        }
+        append('"')
+    }
+
+    fun go(screen: Screen) {
+        _screen.value = screen
+        if (screen == Screen.LIBRARY) rescan()
+    }
+
+    // ---- account (invisible local account; no login UI) ---------------------
+
+    // ---- library -----------------------------------------------------------
+
+    // ---- local engine ------------------------------------------------------
+    // The transcription engine is the SHONAR backend+worker running on this
+    // machine. The app starts it on demand; the user never sees "servers".
+
+    private var apiProc: Process? = null
+    private var workerProc: Process? = null
+
+    fun startEngine() {
+        scope.launch {
+            _engine.value = EngineState.STARTING
+            _engineError.value = null
+            val repo = repoRoot()
+            if (repo == null) {
+                _engine.value = EngineState.FAILED
+                _engineError.value = "Could not find the SHONAR checkout " +
+                    "(set SHONAR_REPO to its path)."
+                return@launch
+            }
+            try {
+                val backend = File(repo, "backend")
+                val venv = File(backend, ".venv/bin")
+                require(File(venv, "uvicorn").canExecute()) {
+                    "Backend not installed at ${backend.path}."
+                }
+                val secret = prefs.getString(KEY_SECRET) ?: run {
+                    val fresh = UUID.randomUUID().toString() + UUID.randomUUID().toString()
+                    prefs.putString(KEY_SECRET, fresh)
+                    fresh
+                }
+                val env = mapOf(
+                    "SHONAR_SECRET_KEY" to secret,
+                    "SHONAR_STORAGE_PATH" to File(repo, "data/storage").absolutePath,
+                    "SHONAR_TRANSCRIPTION_PROVIDER" to "faster_whisper",
+                    "SHONAR_TRANSCRIPTION_MODEL" to "base",
+                )
+                stopEngine()
+                apiProc = spawn(backend, File(venv, "uvicorn").absolutePath,
+                    listOf("shonar.main:app", "--port", "8000"), env)
+                workerProc = spawn(backend, File(venv, "arq").absolutePath,
+                    listOf("shonar.worker.WorkerSettings"), env)
+                var up = false
+                repeat(40) {
+                    delay(3000)
+                    if (engineUp()) {
+                        up = true
+                        return@repeat
+                    }
+                }
+                if (!up) {
+                    stopEngine()
+                    _engine.value = EngineState.FAILED
+                    _engineError.value = "Engine started but never answered " +
+                        "at ${_serverUrl.value}."
+                    return@launch
+                }
+                _engine.value = EngineState.RUNNING
+                if (provisionLocalAccount()) onReady()
+                else if (_engineError.value == null) {
+                    _engine.value = EngineState.FAILED
+                    _engineError.value = "Engine is up but sign-in failed."
+                } else {
+                    _engine.value = EngineState.FAILED
+                }
+            } catch (e: Exception) {
+                stopEngine()
+                _engine.value = EngineState.FAILED
+                _engineError.value = e.message ?: "Could not start the engine."
+            }
+        }
+    }
+
+    fun stopEngine() {
+        apiProc?.destroy()
+        workerProc?.destroy()
+        apiProc = null
+        workerProc = null
+    }
+
+    private fun repoRoot(): File? {
+        val env = System.getenv("SHONAR_REPO")?.let { File(it) }
+        val home = File("/home/avi/Projects/Shonar")
+        return listOfNotNull(env, home).firstOrNull {
+            File(it, "backend/.venv/bin/uvicorn").canExecute()
+        }
+    }
+
+    private fun spawn(dir: File, bin: String, args: List<String>, env: Map<String, String>): Process =
+        ProcessBuilder(listOf(bin) + args).directory(dir).apply {
+            environment().putAll(env)
+            redirectOutput(File.createTempFile("shonar-desktop-", ".log").also { it.deleteOnExit() })
+            redirectErrorStream(true)
+        }.start()
+
+    // ---- library -----------------------------------------------------------
+
+    fun pickFolder(dir: File) = setFolder(dir)
+
+    private fun setFolder(dir: File, silent: Boolean = false) {
+        _folder.value = dir
+        if (!silent) scope.launch { prefs.putString(KEY_FOLDER, dir.absolutePath) }
+        rescan()
+    }
+
+    fun rescan() {
+        val dir = _folder.value ?: return
+        _entries.value = dir.listFiles()
+            ?.filter { it.isFile && !it.name.startsWith(".") && it.extension.lowercase() in AUDIO_EXTS }
+            ?.sortedBy { it.name.lowercase() }
+            ?.map { f -> LibraryEntry(f, reportFile(f).exists()) }
+            .orEmpty()
+    }
+
+    fun setQuery(q: String) {
+        _query.value = q
+        val needle = q.trim().lowercase()
+        val dir = _folder.value
+        if (needle.isEmpty() || dir == null) {
+            _searchResults.value = emptyList()
+            return
+        }
+        val hits = mutableListOf<SearchHit>()
+        dir.listFiles()
+            ?.filter { it.isFile && it.name.endsWith(".transcript.md") }
+            ?.sortedBy { it.name.lowercase() }
+            ?.forEach { report ->
+                report.readLines().forEachIndexed { i, line ->
+                    val at = line.lowercase().indexOf(needle)
+                    if (at >= 0) {
+                        val start = (at - 40).coerceAtLeast(0)
+                        val end = (at + needle.length + 80).coerceAtMost(line.length)
+                        hits += SearchHit(report.nameWithoutExtension, i + 1, line.substring(start, end).trim())
+                        if (hits.size >= 200) return@forEach
+                    }
+                }
+            }
+        _searchResults.value = hits
+    }
+
+    // ---- models ------------------------------------------------------------
+
+    fun refreshModels() {
+        scope.launch {
+            _modelsError.value = null
+            _models.value = runCatching { parseModels(provider.fetchModels()) }.getOrElse {
+                _modelsError.value = it.message ?: "Could not load models."
+                return@launch
+            }
+        }
+    }
+
+    fun setDefaultModel(name: String) {
+        scope.launch {
+            _modelsError.value = null
+            runCatching { provider.setDefaultModel(name) }.onFailure {
+                _modelsError.value = it.message ?: "Could not change the default."
+                return@launch
+            }
+            refreshModels()
+        }
+    }
+
+    fun downloadModel(name: String) {
+        scope.launch {
+            _modelsError.value = "Downloading $name — this can take a while…"
+            runCatching { provider.downloadModel(name) }.onFailure {
+                _modelsError.value = it.message ?: "Download failed."
+                return@launch
+            }
+            _modelsError.value = null
+            refreshModels()
+        }
+    }
+
+    // ---- detail / transcribe -----------------------------------------------
+
+    fun openDetail(file: File) {
+        pollJob?.cancel()
+        _detail.value = DetailUi(file = file)
+        go(Screen.DETAIL)
+    }
+
+    fun setOverride(model: String?) {
+        _detail.value?.let { it.overrideModel = model; _detail.value = it.copy() }
+    }
+
+    fun transcribe() {
+        val d = _detail.value ?: return
+        pollJob?.cancel()
+        pollJob = scope.launch {
+            d.busy = "Uploading…"
+            d.uploadProgress = 0f
+            d.error = null
+            _detail.value = d.copy()
+            val draft = RecordingDraft(
+                id = UUID.randomUUID().toString(),
+                title = d.file.nameWithoutExtension,
+                createdAtEpochMs = d.file.lastModified().takeIf { it > 0 }
+                    ?: System.currentTimeMillis(),
+                durationMs = 0,
+                mime = AUDIO_EXTS[d.file.extension.lowercase()] ?: "audio/mp4",
+                sourceFile = d.file,
+                sizeBytes = d.file.length(),
+                transcriptionModel = d.overrideModel,
+            )
+            val ref = runCatching {
+                provider.upload(draft) { p ->
+                    d.uploadProgress = p
+                    _detail.value = d.copy()
+                }
+            }.getOrElse {
+                d.busy = null
+                d.error = it.message ?: "Upload failed."
+                _detail.value = d.copy()
+                return@launch
+            }
+            d.remoteId = ref.key
+            d.busy = "Transcribing…"
+            d.uploadProgress = null
+            _detail.value = d.copy()
+            // Poll jobs until the transcribe step reaches a terminal state.
+            while (true) {
+                delay(3000)
+                val jobs = runCatching { parseJobs(provider.fetchJobs(ref.key)) }.getOrNull()
+                    .orEmpty()
+                d.jobs = jobs
+                _detail.value = d.copy()
+                val t = jobs.firstOrNull { it.jobType == "transcribe" }?.status
+                if (t == null || t in TERMINAL) break
+            }
+            val failed = d.jobs.firstOrNull { it.jobType == "transcribe" && it.status == "failed" }
+            if (failed != null) {
+                d.busy = null
+                d.error = failed.error ?: "Transcription failed."
+                _detail.value = d.copy()
+                return@launch
+            }
+            d.transcript = runCatching { parseTranscript(provider.fetchTranscript(ref.key)) }
+                .getOrNull()
+            d.summary = runCatching { parseSummary(provider.fetchSummary(ref.key)) }.getOrNull()
+            d.busy = null
+            _detail.value = d.copy()
+            if (d.transcript != null) {
+                saveReport(d)
+                rescan()
+            } else {
+                d.error = "Transcription finished but no transcript was returned."
+                _detail.value = d.copy()
+            }
+        }
+    }
+
+    fun retry() = transcribe()
+
+    fun saveReport(d: DetailUi) {
+        reportFile(d.file).writeText(renderReport(d.file.nameWithoutExtension, d.transcript, d.summary))
+    }
+
+    companion object {
+        const val KEY_URL = "server.url"
+        const val KEY_FOLDER = "library.folder"
+        const val KEY_PASSWORD = "local.password"
+        const val KEY_SECRET = "local.secret"
+        // Must satisfy the engine's email validation (period in domain).
+        const val LOCAL_EMAIL = "desktop@app.shonar"
+
+        val AUDIO_EXTS = mapOf(
+            "m4a" to "audio/mp4", "mp4" to "audio/mp4", "aac" to "audio/aac",
+            "wav" to "audio/wav", "ogg" to "audio/ogg", "opus" to "audio/ogg",
+            "webm" to "audio/webm", "mp3" to "audio/mpeg",
+        )
+
+        val TERMINAL = setOf("succeeded", "failed", "skipped")
+
+        fun defaultAppDir(): File =
+            File(System.getProperty("user.home"), ".config/shonar-desktop").apply { mkdirs() }
+
+        fun reportFile(audio: File): File =
+            File(audio.parentFile, "${audio.nameWithoutExtension}.transcript.md")
+    }
+}
+
+data class SearchHit(val report: String, val line: Int, val snippet: String)
diff --git a/desktop/app/src/main/kotlin/com/shonar/desktop/Main.kt b/desktop/app/src/main/kotlin/com/shonar/desktop/Main.kt
new file mode 100644
index 0000000..8804685
--- /dev/null
+++ b/desktop/app/src/main/kotlin/com/shonar/desktop/Main.kt
@@ -0,0 +1,38 @@
+package com.shonar.desktop
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.application
+import androidx.compose.ui.window.rememberWindowState
+
+fun main() = application {
+    val state = remember { DesktopState() }
+    val screen by state.screen.collectAsState()
+    Window(
+        onCloseRequest = ::exitApplication,
+        title = "SHONAR Desktop",
+        state = rememberWindowState(width = 1100.dp, height = 800.dp),
+    ) {
+        MaterialTheme {
+            Surface(Modifier.fillMaxSize()) {
+                Box(Modifier.fillMaxSize().padding(20.dp)) {
+                    when (screen) {
+                        DesktopState.Screen.ENGINE -> EngineScreen(state)
+                        DesktopState.Screen.LIBRARY -> LibraryScreen(state)
+                        DesktopState.Screen.DETAIL -> DetailScreen(state)
+                        DesktopState.Screen.SETTINGS -> SettingsScreen(state)
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/desktop/app/src/main/kotlin/com/shonar/desktop/Reports.kt b/desktop/app/src/main/kotlin/com/shonar/desktop/Reports.kt
new file mode 100644
index 0000000..a2f3fd4
--- /dev/null
+++ b/desktop/app/src/main/kotlin/com/shonar/desktop/Reports.kt
@@ -0,0 +1,48 @@
+package com.shonar.desktop
+
+import com.shonar.recording.SUMMARY_LIST_KEYS
+import com.shonar.recording.SummaryData
+import com.shonar.recording.TranscriptData
+
+/**
+ * Plaud-style Markdown report written next to the audio file.
+ * Pure logic — unit-tested.
+ */
+fun renderReport(title: String, transcript: TranscriptData?, summary: SummaryData?): String {
+    val out = mutableListOf("# $title", "")
+    if (summary != null) {
+        if (summary.short.isNotBlank()) {
+            out += listOf("## Summary", "", summary.short, "")
+        }
+        for (key in SUMMARY_LIST_KEYS) {
+            val items = summary.list(key)
+            if (items.isNotEmpty()) {
+                out += listOf("## " + key.replace('_', ' ').replaceFirstChar { it.uppercase() }, "")
+                out += items.map { "- $it" } + listOf("")
+            }
+        }
+        if (summary.detailed.isNotBlank()) {
+            out += listOf("## Details", "", summary.detailed, "")
+        }
+    }
+    if (transcript != null) {
+        out += listOf("## Transcript", "")
+        val segs = transcript.segments
+        if (segs.isNotEmpty()) {
+            segs.forEach { s -> out += "[${fmtTs(s.startSec)}] ${s.text}" }
+            out += ""
+        } else {
+            out += listOf(transcript.text, "")
+        }
+        val prov = transcript.provider.ifBlank { "?" }
+        out += "*Transcribed with $prov, v${transcript.version}.*"
+    } else {
+        out += listOf("## Transcript", "", "_No transcript available._", "")
+    }
+    return out.joinToString("\n")
+}
+
+fun fmtTs(sec: Double): String {
+    val total = sec.toLong().coerceAtLeast(0)
+    return "%02d:%02d:%02d".format(total / 3600, (total % 3600) / 60, total % 60)
+}
diff --git a/desktop/app/src/main/kotlin/com/shonar/desktop/Screens.kt b/desktop/app/src/main/kotlin/com/shonar/desktop/Screens.kt
new file mode 100644
index 0000000..3110748
--- /dev/null
+++ b/desktop/app/src/main/kotlin/com/shonar/desktop/Screens.kt
@@ -0,0 +1,367 @@
+package com.shonar.desktop
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+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.items
+import androidx.compose.material3.Button
+import androidx.compose.material3.Card
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.LinearProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.runtime.collectAsState
+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.unit.dp
+import java.io.File
+import javax.swing.JFileChooser
+
+// ---- engine -----------------------------------------------------------------
+
+@androidx.compose.runtime.Composable
+fun EngineScreen(state: DesktopState) {
+    val engine by state.engine.collectAsState()
+    val error by state.engineError.collectAsState()
+
+    Column(Modifier.fillMaxSize(), verticalArrangement = Arrangement.spacedBy(12.dp)) {
+        Text("Starting the transcription engine…",
+            style = MaterialTheme.typography.headlineSmall)
+        Text(
+            "SHONAR transcribes on this computer with local models — nothing " +
+                "is uploaded anywhere. The engine runs in the background while " +
+                "this app is open.",
+            style = MaterialTheme.typography.bodyMedium,
+        )
+        when (engine) {
+            DesktopState.EngineState.STARTING, DesktopState.EngineState.UNKNOWN -> {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    CircularProgressIndicator(Modifier.width(20.dp).height(20.dp))
+                    Spacer(Modifier.width(10.dp))
+                    Text("Starting…")
+                }
+            }
+            else -> {
+                error?.let { Text(it, color = MaterialTheme.colorScheme.error) }
+                Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+                    Button({ state.startEngine() }) { Text("Start engine") }
+                    OutlinedButton({ state.ensureReady() }) { Text("Retry") }
+                }
+            }
+        }
+    }
+}
+
+// ---- library ---------------------------------------------------------------
+
+private fun chooseFolder(): File? {
+    val chooser = JFileChooser().apply {
+        dialogTitle = "Choose your recordings folder"
+        fileSelectionMode = JFileChooser.DIRECTORIES_ONLY
+        isAcceptAllFileFilterUsed = false
+    }
+    return if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) chooser.selectedFile else null
+}
+
+@androidx.compose.runtime.Composable
+fun LibraryScreen(state: DesktopState) {
+    val folder by state.folder.collectAsState()
+    val entries by state.entries.collectAsState()
+    val query by state.query.collectAsState()
+    val hits by state.searchResults.collectAsState()
+    val connected by state.connected.collectAsState()
+
+    Column(Modifier.fillMaxSize(), verticalArrangement = Arrangement.spacedBy(12.dp)) {
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            Text("Recordings", style = MaterialTheme.typography.headlineSmall,
+                modifier = Modifier.weight(1f))
+            TextButton({ state.go(DesktopState.Screen.SETTINGS) }) { Text("Settings") }
+        }
+        if (!connected) {
+            Card(Modifier.fillMaxWidth()) {
+                Row(Modifier.fillMaxWidth().padding(12.dp),
+                    verticalAlignment = Alignment.CenterVertically) {
+                    Text("Transcription engine isn't running.",
+                        modifier = Modifier.weight(1f))
+                    TextButton({ state.go(DesktopState.Screen.ENGINE) }) {
+                        Text("Start it")
+                    }
+                }
+            }
+        }
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            Text(folder?.absolutePath ?: "No folder chosen",
+                style = MaterialTheme.typography.bodySmall,
+                modifier = Modifier.weight(1f))
+            Spacer(Modifier.width(8.dp))
+            OutlinedButton({ chooseFolder()?.let { state.pickFolder(it) } }) {
+                Text("Choose folder…")
+            }
+        }
+        OutlinedTextField(query, { state.setQuery(it) },
+            label = { Text("Search saved transcripts") },
+            singleLine = true, modifier = Modifier.fillMaxWidth())
+        if (query.isNotBlank()) {
+            if (hits.isEmpty()) {
+                Text("No matches.", style = MaterialTheme.typography.bodySmall)
+            } else {
+                LazyColumn(Modifier.fillMaxWidth().weight(1f),
+                    verticalArrangement = Arrangement.spacedBy(4.dp)) {
+                    items(hits) { h ->
+                        Card(Modifier.fillMaxWidth()) {
+                            Column(Modifier.padding(10.dp)) {
+                                Text(h.report, style = MaterialTheme.typography.titleSmall)
+                                Text("line ${h.line}: …${h.snippet}…",
+                                    style = MaterialTheme.typography.bodySmall)
+                            }
+                        }
+                    }
+                }
+            }
+        } else if (folder == null) {
+            Text("Pick the folder with your .m4a recordings to begin.",
+                color = MaterialTheme.colorScheme.onSurfaceVariant)
+        } else if (entries.isEmpty()) {
+            Text("No audio files in this folder.",
+                color = MaterialTheme.colorScheme.onSurfaceVariant)
+        } else {
+            LazyColumn(Modifier.fillMaxWidth().weight(1f),
+                verticalArrangement = Arrangement.spacedBy(6.dp)) {
+                items(entries, key = { it.file.absolutePath }) { e ->
+                    Card(Modifier.fillMaxWidth().clickable { state.openDetail(e.file) }) {
+                        Row(Modifier.fillMaxWidth().padding(12.dp),
+                            verticalAlignment = Alignment.CenterVertically) {
+                            Column(Modifier.weight(1f)) {
+                                Text(e.file.nameWithoutExtension,
+                                    style = MaterialTheme.typography.titleSmall)
+                                Text(
+                                    "%.1f MB%s".format(
+                                        e.file.length() / 1e6,
+                                        if (e.hasReport) "  •  transcript saved" else "",
+                                    ),
+                                    style = MaterialTheme.typography.bodySmall,
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                )
+                            }
+                            TextButton({ state.openDetail(e.file) }) { Text("Open") }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+// ---- detail -----------------------------------------------------------------
+
+@androidx.compose.runtime.Composable
+fun DetailScreen(state: DesktopState) {
+    val detail = state.detail.collectAsState().value ?: run {
+        state.go(DesktopState.Screen.LIBRARY)
+        return
+    }
+    val models = state.models.collectAsState().value
+    var showModels by remember { mutableStateOf(false) }
+
+    Column(Modifier.fillMaxSize(), verticalArrangement = Arrangement.spacedBy(12.dp)) {
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            TextButton({ state.go(DesktopState.Screen.LIBRARY) }) { Text("← Library") }
+            Text(detail.file.nameWithoutExtension,
+                style = MaterialTheme.typography.headlineSmall,
+                modifier = Modifier.weight(1f))
+        }
+        // Model override: "Use default" or a specific size.
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            Text("Model: ", style = MaterialTheme.typography.bodyMedium)
+            val current = detail.overrideModel
+                ?: models?.defaultModel
+                ?: "base"
+            TextButton({ showModels = !showModels }) {
+                Text(if (detail.overrideModel == null) "Use default ($current)" else current)
+            }
+        }
+        if (showModels && models != null) {
+            Column(verticalArrangement = Arrangement.spacedBy(4.dp)) {
+                ModelRow(state, detail, null, models.defaultModel,
+                    "Use default (${models.defaultModel})", "")
+                models.models.forEach { m ->
+                    ModelRow(state, detail, m.name, models.defaultModel,
+                        m.displayName, m.description +
+                            (if (!m.available) " — not downloaded" else ""))
+                }
+            }
+            Spacer(Modifier.height(4.dp))
+        }
+        detail.uploadProgress?.let {
+            LinearProgressIndicator(progress = { it }, modifier = Modifier.fillMaxWidth())
+            Text("Uploading… ${(it * 100).toInt()}%")
+        }
+        detail.busy?.takeIf { detail.uploadProgress == null }?.let {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                CircularProgressIndicator(Modifier.width(20.dp).height(20.dp))
+                Spacer(Modifier.width(10.dp))
+                Text(it)
+            }
+        }
+        val tJob = detail.jobs.firstOrNull { it.jobType == "transcribe" }
+        tJob?.let {
+            val label = when {
+                it.status == "succeeded" -> "Transcribed"
+                it.status == "failed" -> "Failed"
+                it.stage == "loading-model" -> "Loading model…"
+                it.stage == "transcribing" -> "Transcribing…"
+                it.status == "running" -> "Working… (attempt ${it.attempt}/${it.maxAttempts})"
+                else -> "Queued"
+            }
+            Text(label, style = MaterialTheme.typography.bodyMedium,
+                color = if (it.status == "failed") MaterialTheme.colorScheme.error
+                else MaterialTheme.colorScheme.primary)
+        }
+        detail.error?.let {
+            Text(it, color = MaterialTheme.colorScheme.error)
+            if (tJob?.status == "failed") {
+                Button({ state.retry() }) { Text("Retry transcription") }
+            }
+        }
+        if (detail.busy == null && detail.transcript == null && detail.error == null) {
+            Button({ state.transcribe() }) { Text("Transcribe") }
+        }
+        detail.transcript?.let { t ->
+            Text("Transcript", style = MaterialTheme.typography.titleMedium)
+            LazyColumn(Modifier.fillMaxWidth().weight(1f),
+                verticalArrangement = Arrangement.spacedBy(4.dp)) {
+                if (t.segments.isNotEmpty()) {
+                    items(t.segments.size) { i ->
+                        val s = t.segments[i]
+                        Text("[${fmtTs(s.startSec)}]  ${s.text}",
+                            style = MaterialTheme.typography.bodyMedium)
+                    }
+                } else {
+                    item { Text(t.text) }
+                }
+            }
+            Text("Saved to ${detail.file.nameWithoutExtension}.transcript.md",
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant)
+        }
+        detail.summary?.let { s ->
+            if (s.short.isNotBlank()) {
+                Text("Summary", style = MaterialTheme.typography.titleMedium)
+                Text(s.short)
+            }
+        }
+        Spacer(Modifier.height(4.dp))
+        Text("Summaries via Hermes land in Stage 4 — transcription above is complete without it.",
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant)
+    }
+}
+
+@androidx.compose.runtime.Composable
+private fun ModelRow(
+    state: DesktopState,
+    detail: DesktopState.DetailUi,
+    value: String?,
+    default: String,
+    title: String,
+    subtitle: String,
+) {
+    val selected = detail.overrideModel == value ||
+        (value == null && detail.overrideModel == null)
+    Card(
+        Modifier.fillMaxWidth().clickable { state.setOverride(value) },
+    ) {
+        Row(Modifier.fillMaxWidth().padding(10.dp),
+            verticalAlignment = Alignment.CenterVertically) {
+            Text(if (selected) "◉ " else "○ ")
+            Column {
+                Text(title, style = MaterialTheme.typography.bodyMedium)
+                if (subtitle.isNotBlank()) {
+                    Text(subtitle, style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant)
+                }
+            }
+        }
+    }
+}
+
+// ---- settings -----------------------------------------------------------------
+
+@androidx.compose.runtime.Composable
+fun SettingsScreen(state: DesktopState) {
+    val models = state.models.collectAsState().value
+    val modelsError = state.modelsError.collectAsState().value
+    val url by state.serverUrl.collectAsState()
+
+    Column(Modifier.fillMaxSize(), verticalArrangement = Arrangement.spacedBy(12.dp)) {
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            TextButton({ state.go(DesktopState.Screen.LIBRARY) }) { Text("← Library") }
+            Text("Settings", style = MaterialTheme.typography.headlineSmall)
+        }
+        Text("Local engine: $url", style = MaterialTheme.typography.bodySmall)
+        Spacer(Modifier.height(4.dp))
+        Text("Default transcription model", style = MaterialTheme.typography.titleMedium)
+        Text("Applies to future transcriptions. Each recording keeps the model it used.",
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant)
+        if (models == null) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                CircularProgressIndicator(Modifier.width(20.dp).height(20.dp))
+                Spacer(Modifier.width(10.dp))
+                Text("Loading models…")
+            }
+        } else {
+            if (!models.fasterWhisperInstalled) {
+                Text("faster-whisper is not installed on the server " +
+                    "(pip install shonar-backend[faster-whisper]).",
+                    color = MaterialTheme.colorScheme.error)
+            }
+            models.models.forEach { m ->
+                Card(Modifier.fillMaxWidth()) {
+                    Column(Modifier.padding(10.dp),
+                        verticalArrangement = Arrangement.spacedBy(4.dp)) {
+                        Row(verticalAlignment = Alignment.CenterVertically) {
+                            Text(
+                                (if (m.isDefault) "◉ " else "○ ") + m.displayName,
+                                style = MaterialTheme.typography.bodyMedium,
+                                modifier = Modifier.weight(1f),
+                            )
+                            if (!m.isDefault) {
+                                TextButton({ state.setDefaultModel(m.name) }) {
+                                    Text("Set default")
+                                }
+                            }
+                            if (!m.downloaded) {
+                                TextButton({ state.downloadModel(m.name) }) {
+                                    Text("Download")
+                                }
+                            }
+                        }
+                        Text(m.description, style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant)
+                        Text("${m.params}  •  ${m.approxMemory}  •  ${m.relativeSpeed}" +
+                            (if (m.available) "  •  ready" else "  •  not downloaded"),
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant)
+                    }
+                }
+            }
+        }
+        modelsError?.let { Text(it, color = MaterialTheme.colorScheme.error) }
+    }
+}
diff --git a/desktop/app/src/main/kotlin/com/shonar/settings/DesktopSettingsStore.kt b/desktop/app/src/main/kotlin/com/shonar/settings/DesktopSettingsStore.kt
new file mode 100644
index 0000000..7b67c49
--- /dev/null
+++ b/desktop/app/src/main/kotlin/com/shonar/settings/DesktopSettingsStore.kt
@@ -0,0 +1,101 @@
+package com.shonar.settings
+
+import java.io.File
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import org.json.JSONObject
+
+/**
+ * Desktop copy of the settings-store contract. The Android original
+ * (DataStore/Keystore implementations) cannot compile on JVM desktop, so
+ * this file provides the same fully-qualified names backed by plain files:
+ * [SettingsStore], [InMemorySettingsStore], and [FileSettingsStore].
+ *
+ * Secrets note: desktop v1 keeps server tokens in a 0600 JSON file next to
+ * ordinary settings. Good enough for a local single-user app; a keyring
+ * backend can replace [FileSettingsStore] later without touching callers.
+ */
+interface SettingsStore {
+    suspend fun getString(key: String): String?
+    suspend fun putString(key: String, value: String)
+    suspend fun remove(key: String)
+    suspend fun keys(): Set<String>
+
+    /** Emits whenever any value changes (for reactive UI). */
+    val changes: StateFlow<Long>
+}
+
+/** In-memory store: used by unit tests. */
+class InMemorySettingsStore : SettingsStore {
+    private val map = mutableMapOf<String, String>()
+    private val changeFlow = MutableStateFlow(0L)
+    override val changes: StateFlow<Long> = changeFlow.asStateFlow()
+
+    override suspend fun getString(key: String): String? = map[key]
+    override suspend fun putString(key: String, value: String) {
+        map[key] = value
+        changeFlow.value += 1
+    }
+
+    override suspend fun remove(key: String) {
+        map.remove(key)
+        changeFlow.value += 1
+    }
+
+    override suspend fun keys(): Set<String> = map.keys.toSet()
+}
+
+/** JSON file store (0600). Keys map 1:1 to the JSON object members. */
+class FileSettingsStore(private val file: File) : SettingsStore {
+    private val mutex = Mutex()
+    private val changeFlow = MutableStateFlow(0L)
+    override val changes: StateFlow<Long> = changeFlow.asStateFlow()
+
+    private fun readAll(): MutableMap<String, String> {
+        if (!file.isFile) return mutableMapOf()
+        return runCatching {
+            val obj = JSONObject(file.readText())
+            buildMap {
+                for (key in obj.keys()) put(key, obj.optString(key, ""))
+            }.toMutableMap()
+        }.getOrDefault(mutableMapOf())
+    }
+
+    private fun writeAll(map: Map<String, String>) {
+        file.parentFile?.mkdirs()
+        file.writeText(JSONObject(map).toString())
+        runCatching {
+            file.setReadable(false, false)
+            file.setReadable(true, true)
+            file.setWritable(false, false)
+            file.setWritable(true, true)
+        }
+    }
+
+    override suspend fun getString(key: String): String? = mutex.withLock {
+        readAll()[key]
+    }
+
+    override suspend fun putString(key: String, value: String) = mutex.withLock {
+        val map = readAll()
+        map[key] = value
+        writeAll(map)
+        changeFlow.value += 1
+    }
+
+    override suspend fun remove(key: String) {
+        mutex.withLock {
+            val map = readAll()
+            map.remove(key)
+            writeAll(map)
+            changeFlow.value += 1
+        }
+    }
+
+    override suspend fun keys(): Set<String> = mutex.withLock {
+        readAll().keys.toSet()
+    }
+}
diff --git a/desktop/app/src/test/kotlin/com/shonar/desktop/ReportsTest.kt b/desktop/app/src/test/kotlin/com/shonar/desktop/ReportsTest.kt
new file mode 100644
index 0000000..a3e837b
--- /dev/null
+++ b/desktop/app/src/test/kotlin/com/shonar/desktop/ReportsTest.kt
@@ -0,0 +1,60 @@
+package com.shonar.desktop
+
+import com.shonar.recording.SummaryData
+import com.shonar.recording.TranscriptData
+import com.shonar.recording.TranscriptSegment
+import java.io.File
+import java.nio.file.Files
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class ReportsTest {
+
+    @Test fun renderTranscriptWithTimestamps() {
+        val t = TranscriptData(
+            version = 1, provider = "faster_whisper", model = "base",
+            text = "hello world",
+            segments = listOf(
+                TranscriptSegment(0.0, 1.5, "hello"),
+                TranscriptSegment(65.0, 67.0, "world"),
+            ),
+        )
+        val md = renderReport("Evening notes", t, null)
+        assertTrue(md.startsWith("# Evening notes"))
+        assertTrue("[00:00:00] hello" in md)
+        assertTrue("[00:01:05] world" in md)
+        assertTrue("faster_whisper, v1" in md)
+    }
+
+    @Test fun renderEmptyTranscript() {
+        val md = renderReport("x", null, null)
+        assertTrue("_No transcript available._" in md)
+    }
+
+    @Test fun fmtTsShape() {
+        assertEquals("00:00:00", fmtTs(0.0))
+        assertEquals("00:01:05", fmtTs(65.0))
+        assertEquals("01:02:03", fmtTs(3723.0))
+    }
+
+    @Test fun reportFileName() {
+        val dir = Files.createTempDirectory("rep").toFile()
+        try {
+            val audio = File(dir, "chat.m4a")
+            assertEquals("chat.transcript.md", DesktopState.reportFile(audio).name)
+        } finally {
+            dir.deleteRecursively()
+        }
+    }
+
+    @Test fun sharedParsersWorkOnDesktop() {
+        val raw = """{"version":2,"provider":"user","text":"hi","segments":[],
+            "edited_by_user":true}"""
+        val t = com.shonar.recording.parseTranscript(raw)!!
+        assertEquals(2, t.version)
+        assertTrue(t.editedByUser)
+        val summary = SummaryData(version = 1, content = mapOf("short" to "s"))
+        assertEquals("s", summary.short)
+    }
+}
diff --git a/desktop/gradle/wrapper/gradle-wrapper.jar b/desktop/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..1b33c55
Binary files /dev/null and b/desktop/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/desktop/gradle/wrapper/gradle-wrapper.properties b/desktop/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..e2847c8
--- /dev/null
+++ b/desktop/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/desktop/gradlew b/desktop/gradlew
new file mode 100755
index 0000000..23d15a9
--- /dev/null
+++ b/desktop/gradlew
@@ -0,0 +1,251 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       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
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# 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 "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH="\\\"\\\""
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/desktop/launch-desktop.sh b/desktop/launch-desktop.sh
new file mode 100755
index 0000000..1e74196
--- /dev/null
+++ b/desktop/launch-desktop.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+# Launch the SHONAR desktop app (packaged binary, no Gradle needed).
+set -euo pipefail
+cd "$(dirname "$0")"
+BIN="app/build/compose/binaries/main/app/shonar-desktop/bin/shonar-desktop"
+if [ ! -x "$BIN" ]; then
+  echo "Desktop build not found. Run: ./gradlew :app:createDistributable" >&2
+  exit 1
+fi
+export DISPLAY="${DISPLAY:-:0}"
+exec "$BIN"
diff --git a/desktop/settings.gradle.kts b/desktop/settings.gradle.kts
new file mode 100644
index 0000000..1add82b
--- /dev/null
+++ b/desktop/settings.gradle.kts
@@ -0,0 +1,17 @@
+pluginManagement {
+    repositories {
+        mavenCentral()
+        gradlePluginPortal()
+        google()
+    }
+}
+
+dependencyResolutionManagement {
+    repositories {
+        mavenCentral()
+        google()
+    }
+}
+
+rootProject.name = "shonar-desktop"
+include(":app")
diff --git a/scripts/transcribe_folder.py b/scripts/transcribe_folder.py
new file mode 100644
index 0000000..e4bf704
--- /dev/null
+++ b/scripts/transcribe_folder.py
@@ -0,0 +1,234 @@
+#!/usr/bin/env python3
+"""Transcribe a folder of audio files with the local SHONAR stack.
+
+Usage:
+    python3 scripts/transcribe_folder.py /home/avi/Music/Recordings [--api URL] [--email E] [--password P]
+
+For each recognised audio file it: registers/logs in, uploads chunked,
+finalizes, waits for the worker's transcription job, then writes a
+Plaud-style `{stem}.transcript.md` (summary section included only when an
+LLM provider is configured server-side) next to the audio. Files that
+already have a report are skipped unless --redo is passed.
+
+Needs: API + worker running against the same DB, e.g.
+    cd backend && SHONAR_SECRET_KEY=... SHONAR_TRANSCRIPTION_PROVIDER=faster_whisper \
+        SHONAR_TRANSCRIPTION_MODEL=base .venv/bin/uvicorn shonar.main:app --port 8000
+    cd backend && <same env> .venv/bin/arq shonar.worker.WorkerSettings
+"""
+
+from __future__ import annotations
+
+import argparse
+import hashlib
+import json
+import sys
+import time
+import urllib.error
+import urllib.request
+from pathlib import Path
+
+CHUNK = 8 * 1024 * 1024
+MIME_BY_SUFFIX = {
+    ".m4a": "audio/mp4",
+    ".mp4": "audio/mp4",
+    ".aac": "audio/aac",
+    ".wav": "audio/wav",
+    ".ogg": "audio/ogg",
+    ".opus": "audio/ogg",
+    ".webm": "audio/webm",
+    ".mp3": "audio/mpeg",
+}
+
+
+class Api:
+    def __init__(self, base: str, token: str = ""):
+        self.base = base.rstrip("/")
+        self.token = token
+        self.login_fn = None  # set by main: () -> fresh access token
+
+    def _req(self, method: str, path: str, body: bytes | None = None,
+             ctype: str = "application/json", extra: dict | None = None,
+             _retried: bool = False):
+        req = urllib.request.Request(self.base + path, data=body, method=method)
+        if body is not None:
+            req.add_header("Content-Type", ctype)
+        if self.token:
+            req.add_header("Authorization", f"Bearer {self.token}")
+        for k, v in (extra or {}).items():
+            req.add_header(k, v)
+        try:
+            with urllib.request.urlopen(req, timeout=300) as r:
+                raw = r.read()
+                return r.status, json.loads(raw) if raw else None
+        except urllib.error.HTTPError as e:
+            if e.code == 401 and self.login_fn is not None and not _retried:
+                self.token = self.login_fn()  # access tokens expire; log back in
+                return self._req(method, path, body, ctype, extra, _retried=True)
+            try:
+                detail = e.read().decode()[:300]
+            except Exception:
+                detail = ""
+            raise RuntimeError(f"{method} {path} -> HTTP {e.code} {detail}") from None
+
+    def post_json(self, path, obj):
+        return self._req("POST", path, json.dumps(obj).encode())
+
+    def get(self, path):
+        return self._req("GET", path)
+
+
+def ensure_login(api_base: str, email: str, password: str) -> str:
+    api = Api(api_base)
+    try:
+        status, body = api.post_json("/api/v1/auth/register",
+                                     {"email": email, "password": password})
+        assert status == 201
+        return body["access_token"]
+    except RuntimeError as e:
+        if "HTTP 409" not in str(e) and "HTTP 400" not in str(e):
+            raise
+    status, body = api.post_json("/api/v1/auth/login",
+                                 {"email": email, "password": password,
+                                  "device_name": "folder-script", "platform": "desktop"})
+    assert status == 200, body
+    return body["access_token"]
+
+
+def upload_file(api: Api, path: Path) -> str:
+    size = path.stat().st_size
+    mime = MIME_BY_SUFFIX[path.suffix.lower()]
+    client_id = "folder-" + hashlib.sha1(str(path).encode()).hexdigest()[:40]
+    status, sess = api.post_json("/api/v1/uploads", {
+        "declared_mime_type": mime, "declared_size_bytes": size,
+        "title": path.stem, "client_recording_id": client_id,
+    })
+    assert status == 201, sess
+    sid, chunk_size = sess["id"], sess["chunk_size_bytes"]
+    data = path.read_bytes()
+    n = (size + chunk_size - 1) // chunk_size
+    for i in range(n):
+        part = data[i * chunk_size:(i + 1) * chunk_size]
+        digest = hashlib.sha256(part).hexdigest()
+        api._req("PUT", f"/api/v1/uploads/{sid}/chunks/{i}", part,
+                 ctype="application/octet-stream", extra={"X-Chunk-Sha256": digest})
+    status, rec = api.post_json(f"/api/v1/uploads/{sid}/finalize",
+                                {"duration_seconds": 0.0})
+    assert status == 201, rec
+    return rec["id"]
+
+
+def wait_transcribed(api: Api, rid: str, timeout_s: int) -> str:
+    """Poll jobs until transcribe reaches a terminal state; return recording status."""
+    deadline = time.time() + timeout_s
+    while time.time() < deadline:
+        status, jobs = api.get(f"/api/v1/recordings/{rid}/jobs")
+        by_type = {j["job_type"]: j["status"] for j in jobs} if isinstance(jobs, list) else {}
+        t = by_type.get("transcribe")
+        if t in ("succeeded", "failed", "skipped"):
+            status, rec = api.get(f"/api/v1/recordings/{rid}")
+            return rec["processing_status"]
+        time.sleep(5)
+    return "timeout"
+
+
+def fetch_optional(api: Api, path: str):
+    try:
+        status, body = api.get(path)
+        return body if status == 200 else None
+    except RuntimeError as e:
+        if "HTTP 404" in str(e):
+            return None
+        raise
+
+
+def fmt_ts(sec: float) -> str:
+    sec = max(0, int(sec))
+    return f"{sec // 3600:02d}:{(sec % 3600) // 60:02d}:{sec % 60:02d}"
+
+
+def render_report(title: str, transcript: dict | None, summary: dict | None) -> str:
+    out = [f"# {title}", ""]
+    if summary and isinstance(summary.get("content"), dict):
+        c = summary["content"]
+        if c.get("short"):
+            out += ["## Summary", "", str(c["short"]), ""]
+        for key in ("key_points", "decisions", "action_items", "questions"):
+            items = c.get(key) or []
+            if items:
+                out += ["## " + key.replace("_", " ").title(), ""]
+                out += [f"- {i}" for i in items] + [""]
+        if c.get("detailed"):
+            out += ["## Details", "", str(c["detailed"]), ""]
+    if transcript:
+        out += ["## Transcript", ""]
+        segs = transcript.get("segments") or []
+        if segs:
+            for s in segs:
+                try:
+                    out.append(f"[{fmt_ts(float(s.get('start', 0)))}] {s.get('text', '')}")
+                except (TypeError, ValueError):
+                    continue
+            out.append("")
+        else:
+            out += [transcript.get("text", ""), ""]
+        prov = transcript.get("provider") or "?"
+        out.append(f"*Transcribed with {prov}, v{transcript.get('version', '?')}.*")
+    else:
+        out += ["## Transcript", "", "_No transcript available._", ""]
+    return "\n".join(out)
+
+
+def main() -> int:
+    ap = argparse.ArgumentParser(description=__doc__.splitlines()[0])
+    ap.add_argument("folder", help="directory of audio files")
+    ap.add_argument("--api", default="http://localhost:8000")
+    ap.add_argument("--email", default="folder@example.com")
+    ap.add_argument("--password", default="folder-test-passw0rd-123")
+    ap.add_argument("--timeout", type=int, default=1800,
+                    help="seconds to wait per file for transcription")
+    ap.add_argument("--redo", action="store_true", help="re-transcribe even if report exists")
+    ap.add_argument("--limit", type=int, default=0, help="only process first N files (0 = all)")
+    args = ap.parse_args()
+
+    folder = Path(args.folder).expanduser()
+    if not folder.is_dir():
+        print(f"error: not a directory: {folder}", file=sys.stderr)
+        return 2
+    files = sorted(p for p in folder.iterdir()
+                   if p.is_file() and not p.name.startswith(".")
+                   and p.suffix.lower() in MIME_BY_SUFFIX)
+    # report name: "<stem>.transcript.md" next to the audio
+    todo = []
+    for p in files:
+        report = p.parent / (p.stem + ".transcript.md")
+        if report.exists() and not args.redo:
+            continue
+        todo.append((p, report))
+    if args.limit:
+        todo = todo[:args.limit]
+    if not todo:
+        print("nothing to do (no new audio files).")
+        return 0
+
+    print(f"logging in as {args.email} ...")
+    token = ensure_login(args.api, args.email, args.password)
+    api = Api(args.api, token)
+    api.login_fn = lambda: ensure_login(args.api, args.email, args.password)
+
+    for i, (path, report) in enumerate(todo, 1):
+        print(f"[{i}/{len(todo)}] {path.name} ({path.stat().st_size / 1e6:.1f} MB) ...",
+              flush=True)
+        try:
+            rid = upload_file(api, path)
+            state = wait_transcribed(api, rid, args.timeout)
+            tr = fetch_optional(api, f"/api/v1/recordings/{rid}/transcript")
+            su = fetch_optional(api, f"/api/v1/recordings/{rid}/summary")
+            report.write_text(render_report(path.stem, tr, su))
+            print(f"    status={state} -> {report.name}")
+        except Exception as e:
+            print(f"    FAILED: {e}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())