@@ -0,0 +1,1991 @@
1+@file:Suppress("TooManyFunctions")
3+package soy.iko.opencode.ui.chat
5+import android.app.Activity
6+import android.content.Intent
8+import android.speech.RecognizerIntent
9+import androidx.activity.compose.BackHandler
10+import androidx.activity.compose.rememberLauncherForActivityResult
11+import androidx.activity.result.PickVisualMediaRequest
12+import androidx.activity.result.contract.ActivityResultContracts
13+import androidx.compose.animation.AnimatedVisibility
14+import androidx.compose.foundation.clickable
15+import androidx.compose.foundation.layout.Arrangement
16+import androidx.compose.foundation.layout.Box
17+import androidx.compose.foundation.layout.Column
18+import androidx.compose.foundation.layout.FlowRow
19+import androidx.compose.foundation.layout.PaddingValues
20+import androidx.compose.foundation.layout.Row
21+import androidx.compose.foundation.layout.Spacer
22+import androidx.compose.foundation.layout.WindowInsets
23+import androidx.compose.foundation.layout.fillMaxSize
24+import androidx.compose.foundation.layout.fillMaxWidth
25+import androidx.compose.foundation.layout.imePadding
26+import androidx.compose.foundation.layout.navigationBars
27+import androidx.compose.foundation.layout.padding
28+import androidx.compose.foundation.layout.size
29+import androidx.compose.foundation.layout.union
30+import androidx.compose.foundation.layout.widthIn
31+import androidx.compose.foundation.layout.windowInsetsPadding
32+import androidx.compose.foundation.layout.wrapContentWidth
33+import androidx.compose.foundation.lazy.LazyColumn
34+import androidx.compose.foundation.lazy.items
35+import androidx.compose.foundation.lazy.rememberLazyListState
36+import androidx.compose.material.icons.Icons
37+import androidx.compose.material.icons.automirrored.filled.ArrowBack
38+import androidx.compose.material.icons.automirrored.filled.Send
39+import androidx.compose.material.icons.filled.Add
40+import androidx.compose.material.icons.filled.AutoAwesome
41+import androidx.compose.material.icons.filled.Delete
42+import androidx.compose.material.icons.filled.Description
43+import androidx.compose.material.icons.filled.Edit
44+import androidx.compose.material.icons.filled.Expand
45+import androidx.compose.material.icons.filled.KeyboardArrowDown
46+import androidx.compose.material.icons.filled.KeyboardArrowUp
47+import androidx.compose.material.icons.filled.Mic
48+import androidx.compose.material.icons.filled.MoreVert
49+import androidx.compose.material.icons.filled.PhotoCamera
50+import androidx.compose.material.icons.filled.PhotoLibrary
51+import androidx.compose.material.icons.filled.Refresh
52+import androidx.compose.material.icons.filled.Restore
53+import androidx.compose.material.icons.automirrored.filled.PlaylistAdd
54+import androidx.compose.material.icons.filled.Schedule
55+import androidx.compose.material.icons.filled.Stop
56+import androidx.compose.material3.AlertDialog
57+import androidx.compose.material3.Badge
58+import androidx.compose.material3.BadgedBox
59+import androidx.compose.material3.Button
60+import androidx.compose.material3.CircularProgressIndicator
61+import androidx.compose.material3.SmallFloatingActionButton
62+import androidx.compose.material3.DropdownMenu
63+import androidx.compose.material3.DropdownMenuItem
64+import androidx.compose.material3.ExperimentalMaterial3Api
65+import androidx.compose.material3.ExtendedFloatingActionButton
66+import androidx.compose.material3.FloatingActionButton
67+import androidx.compose.material3.Icon
68+import androidx.compose.material3.IconButton
69+import androidx.compose.material3.MaterialTheme
70+import androidx.compose.material3.OutlinedTextField
71+import androidx.compose.material3.Scaffold
72+import androidx.compose.material3.SnackbarHost
73+import androidx.compose.material3.SnackbarHostState
74+import androidx.compose.material3.Surface
75+import androidx.compose.material3.Text
76+import androidx.compose.material3.TextButton
77+import androidx.compose.material3.TopAppBar
78+import androidx.compose.material3.pulltorefresh.PullToRefreshBox
79+import androidx.compose.runtime.Composable
80+import androidx.compose.runtime.CompositionLocalProvider
81+import androidx.compose.runtime.DisposableEffect
82+import androidx.compose.runtime.LaunchedEffect
83+import androidx.compose.runtime.derivedStateOf
84+import androidx.compose.runtime.getValue
85+import androidx.compose.runtime.mutableStateOf
86+import androidx.compose.runtime.remember
87+import androidx.compose.runtime.rememberCoroutineScope
88+import androidx.compose.runtime.rememberUpdatedState
89+import androidx.compose.runtime.saveable.rememberSaveable
90+import androidx.compose.runtime.setValue
91+import androidx.compose.runtime.snapshotFlow
92+import androidx.compose.foundation.text.KeyboardActions
93+import androidx.compose.foundation.text.KeyboardOptions
94+import androidx.compose.ui.text.input.KeyboardCapitalization
95+import androidx.compose.ui.Alignment
96+import androidx.compose.ui.Modifier
97+import androidx.compose.ui.focus.focusRequester
98+import androidx.compose.ui.input.key.Key
99+import androidx.compose.ui.input.key.KeyEventType
100+import androidx.compose.ui.input.key.isCtrlPressed
101+import androidx.compose.ui.input.key.isShiftPressed
102+import androidx.compose.ui.input.key.key
103+import androidx.compose.ui.input.key.onPreviewKeyEvent
104+import androidx.compose.ui.input.key.type
105+import androidx.compose.ui.platform.LocalContext
106+import androidx.compose.ui.platform.LocalHapticFeedback
107+import androidx.compose.ui.platform.LocalView
108+import androidx.compose.ui.platform.testTag
109+import androidx.compose.ui.res.stringResource
110+import androidx.compose.ui.semantics.Role
111+import androidx.compose.ui.semantics.contentDescription
112+import androidx.compose.ui.semantics.semantics
113+import androidx.compose.ui.text.input.ImeAction
114+import androidx.compose.ui.text.style.TextOverflow
115+import androidx.compose.ui.unit.dp
116+import androidx.lifecycle.compose.collectAsStateWithLifecycle
117+import androidx.lifecycle.viewmodel.compose.viewModel
118+import kotlinx.coroutines.Dispatchers
119+import kotlinx.coroutines.flow.distinctUntilChanged
120+import kotlinx.coroutines.launch
121+import kotlinx.coroutines.withContext
122+import soy.iko.opencode.data.model.Part
123+import soy.iko.opencode.data.model.MessageWithParts
124+import soy.iko.opencode.data.model.ReasoningPart
125+import soy.iko.opencode.data.model.TextPart
126+import soy.iko.opencode.data.model.ToolCompleted
127+import soy.iko.opencode.data.model.ToolError
128+import soy.iko.opencode.data.model.ToolPart
129+import soy.iko.opencode.data.model.ToolRunning
130+import soy.iko.opencode.data.network.EventStreamClient
131+import soy.iko.opencode.data.network.NetworkConfig
132+import soy.iko.opencode.di.AppContainer
133+import soy.iko.opencode.R
134+import soy.iko.opencode.ui.components.CommandPalette
135+import soy.iko.opencode.ui.components.ConnectionBanner
136+import soy.iko.opencode.ui.components.PaletteAction
137+import soy.iko.opencode.ui.components.copyToClipboard
138+import soy.iko.opencode.ui.components.LocalRelativeTimeTick
139+import soy.iko.opencode.ui.components.rememberRelativeTimeTick
140+import soy.iko.opencode.ui.components.showToast
141+import soy.iko.opencode.ui.components.toImageContext
142+import soy.iko.opencode.ui.vmFactory
143+import soy.iko.opencode.util.runCatchingCancellable
145+@OptIn(ExperimentalMaterial3Api::class)
148+ container: AppContainer,
151+ onOpenFile: ((String) -> Unit)? = null,
152+ onOpenSession: ((String) -> Unit)? = null,
154+ val vm: ChatViewModel = viewModel(key = sessionId, factory = vmFactory { ChatViewModel(container, sessionId) })
155+ val hasMessages by vm.hasMessages.collectAsStateWithLifecycle()
156+ val running by vm.running.collectAsStateWithLifecycle()
157+ val aborting by vm.aborting.collectAsStateWithLifecycle()
158+ val loading by vm.loading.collectAsStateWithLifecycle()
159+ val loadError by vm.loadError.collectAsStateWithLifecycle()
160+ val refreshing by vm.refreshing.collectAsStateWithLifecycle()
161+ val models by vm.models.collectAsStateWithLifecycle()
162+ val modelsLoading by vm.modelsLoading.collectAsStateWithLifecycle()
163+ val modelsError by vm.modelsError.collectAsStateWithLifecycle()
164+ val selectedModel by vm.selectedModel.collectAsStateWithLifecycle()
165+ val connectionState by vm.connectionState.collectAsStateWithLifecycle()
166+ val pendingPermission by vm.pendingPermission.collectAsStateWithLifecycle()
167+ val permissionProgress by vm.permissionProgress.collectAsStateWithLifecycle()
168+ val agents by vm.agents.collectAsStateWithLifecycle()
169+ val agentsLoading by vm.agentsLoading.collectAsStateWithLifecycle()
170+ val agentsError by vm.agentsError.collectAsStateWithLifecycle()
171+ val selectedAgent by vm.selectedAgent.collectAsStateWithLifecycle()
172+ val commands by vm.commands.collectAsStateWithLifecycle()
173+ val commandsLoading by vm.commandsLoading.collectAsStateWithLifecycle()
174+ val commandsError by vm.commandsError.collectAsStateWithLifecycle()
175+ val sessionTitle by vm.sessionTitle.collectAsStateWithLifecycle()
176+ val sessionDeleted by vm.sessionDeleted.collectAsStateWithLifecycle()
177+ val draft by vm.draft.collectAsStateWithLifecycle()
178+ val attachments by vm.attachments.collectAsStateWithLifecycle()
179+ val reverted by vm.reverted.collectAsStateWithLifecycle()
180+ val shareUrl by vm.shareUrl.collectAsStateWithLifecycle()
181+ val reconnecting by vm.reconnecting.collectAsStateWithLifecycle()
182+ val sendOnEnter by container.settingsStore.sendOnEnter.collectAsStateWithLifecycle(initialValue = true)
183+ val isOnline by container.isOnline.collectAsStateWithLifecycle()
184+ val haptics = LocalHapticFeedback.current
185+ val scope = rememberCoroutineScope()
186+ val shareContext = LocalContext.current
187+ val defaultShareSubject = stringResource(R.string.share_subject)
188+ val sessionLabel = stringResource(R.string.session)
189+ val defaultModelLabel = stringResource(R.string.default_model)
190+ val subtitle = remember(selectedModel?.modelLabel, selectedAgent, defaultModelLabel) {
192+ append(selectedModel?.modelLabel ?: defaultModelLabel)
193+ selectedAgent?.let { append(" · $it") }
197+ // Connection profile (with auth) for rendering inline image attachments.
198+ // Collect as state so a server switch recomposes the image context.
199+ val activeConnection by container.activeConnection.collectAsStateWithLifecycle()
200+ val imageContext = remember(activeConnection?.profile) {
201+ activeConnection?.profile?.toImageContext()
204+ // Mark this session as read while the user is viewing it; clear on leave so new
205+ // background activity can badge it again.
206+ DisposableEffect(sessionId) {
207+ container.setCurrentSession(sessionId)
208+ onDispose { if (container.currentSession.value == sessionId) container.setCurrentSession(null) }
211+ // Navigate away when the session is deleted via SSE so the user isn't left
212+ // on a zombie screen showing a conversation that no longer exists. Surface a
213+ // toast (not a snackbar) because the screen is about to be popped — a snackbar
214+ // would be torn down before the user could read it, while a toast survives.
215+ // Covers both SSE-driven deletion (deleted on another device) and a user-
216+ // initiated delete from the chat overflow menu (deleteSession in ChatViewModel
217+ // sets the same flag on success).
218+ val deletedContext = LocalContext.current
219+ LaunchedEffect(sessionDeleted) {
220+ if (sessionDeleted) {
221+ showToast(deletedContext, deletedContext.getString(R.string.session_deleted_chat))
226+ val snackbar = remember { SnackbarHostState() }
227+ val retryLabel = stringResource(R.string.retry)
228+ val inputFocusRequester = remember { androidx.compose.ui.focus.FocusRequester() }
229+ var showModelPicker by rememberSaveable { mutableStateOf(false) }
230+ var showAgentPicker by rememberSaveable { mutableStateOf(false) }
231+ var showTitleMenu by rememberSaveable { mutableStateOf(false) }
232+ var showCommandPicker by rememberSaveable { mutableStateOf(false) }
233+ var showExitConfirm by rememberSaveable { mutableStateOf(false) }
234+ var showStopConfirm by rememberSaveable { mutableStateOf(false) }
235+ var showOverflowMenu by rememberSaveable { mutableStateOf(false) }
236+ var showRenameDialog by rememberSaveable { mutableStateOf(false) }
237+ var showDeleteDialog by rememberSaveable { mutableStateOf(false) }
238+ var showShellDialog by rememberSaveable { mutableStateOf(false) }
239+ var showPalette by rememberSaveable { mutableStateOf(false) }
240+ // Summarize and init (generate AGENTS.md) are irreversible, so a single tap is gated behind
241+ // a confirmation dialog (from both the overflow menu and the command palette).
242+ var showSummarizeConfirm by rememberSaveable { mutableStateOf(false) }
243+ var showInitConfirm by rememberSaveable { mutableStateOf(false) }
245+ // Command-palette entries (keyboard-first: Ctrl+K). Labels resolved here so the remembered
246+ // action list doesn't need a Composable context. Actions map to the same handlers the
247+ // overflow menu drives, so the palette is a keyboard shortcut to them, not a parallel path.
248+ val paletteModelLabel = stringResource(R.string.palette_switch_model)
249+ val paletteAgentLabel = stringResource(R.string.palette_choose_agent)
250+ val paletteCommandLabel = stringResource(R.string.palette_run_command)
251+ val paletteSummarizeLabel = stringResource(R.string.palette_summarize)
252+ val paletteRenameLabel = stringResource(R.string.rename_session_chat)
253+ val paletteShellLabel = stringResource(R.string.run_shell_command)
254+ val paletteActions = remember(
255+ paletteModelLabel, paletteAgentLabel, paletteCommandLabel,
256+ paletteSummarizeLabel, paletteRenameLabel, paletteShellLabel, hasMessages, running,
259+ add(PaletteAction("model", paletteModelLabel) { showModelPicker = true })
260+ add(PaletteAction("agent", paletteAgentLabel) { showAgentPicker = true })
261+ add(PaletteAction("command", paletteCommandLabel) { showCommandPicker = true })
262+ if (hasMessages && !running) add(PaletteAction("summarize", paletteSummarizeLabel) { showSummarizeConfirm = true })
263+ if (!running) add(PaletteAction("shell", paletteShellLabel) { showShellDialog = true })
264+ add(PaletteAction("rename", paletteRenameLabel) { showRenameDialog = true })
268+ // Keep the screen awake while the agent is working in *this* session. The foreground
269+ // service that holds process priority during a run is managed app-wide off
270+ // container.anyRunActive (see OpencodeApp) so it survives navigating away from the chat
271+ // mid-run — otherwise leaving the screen would drop priority and Doze could choke the
272+ // SSE stream before the completion notification fires.
273+ val currentView = LocalView.current
274+ val appContext = LocalContext.current.applicationContext
275+ DisposableEffect(running) {
276+ currentView.keepScreenOn = running
277+ onDispose { currentView.keepScreenOn = false }
280+ LaunchedEffect(Unit) {
281+ vm.errorEvents.collect { event ->
282+ // Only a failed *send* is retryable; attaching Retry to any other error (e.g. a
283+ // message-load failure) would silently re-submit the last prompt on tap.
284+ val result = if (event.retryable) {
285+ snackbar.showSnackbar(message = event.message, actionLabel = retryLabel)
287+ snackbar.showSnackbar(event.message)
289+ if (result == androidx.compose.material3.SnackbarResult.ActionPerformed) vm.retryFailed()
293+ // --- Attachments, voice, and share-link plumbing ---
294+ val attachTooLargeMsg = stringResource(R.string.attachment_too_large)
295+ val attachFailedMsg = stringResource(R.string.attachment_failed)
296+ val attachLimitMsg = stringResource(R.string.attachment_limit)
297+ val noCameraMsg = stringResource(R.string.no_camera_app)
298+ val noVoiceMsg = stringResource(R.string.no_voice_app)
299+ val voicePrompt = stringResource(R.string.voice_prompt)
300+ val linkCopiedMsg = stringResource(R.string.link_copied)
302+ // Count of picks currently being read + base64-encoded off the main thread, so the
303+ // composer can show a staging placeholder immediately (chips only materialize once done).
304+ var stagingCount by remember { mutableStateOf(0) }
306+ // Convert each picked Uri to a base64 attachment off the main thread, honoring the
307+ // per-prompt count cap and surfacing per-file errors without aborting the batch.
308+ fun stageUris(uris: List<Uri>) {
309+ if (uris.isEmpty()) return
314+ if (vm.attachments.value.size >= NetworkConfig.maxAttachments) {
315+ snackbar.showSnackbar(attachLimitMsg)
318+ when (val result = uri.toAttachmentResult(appContext)) {
319+ is AttachmentResult.Ok -> vm.addAttachment(result.attachment)
320+ AttachmentResult.TooLarge -> snackbar.showSnackbar(attachTooLargeMsg)
321+ AttachmentResult.Failed -> snackbar.showSnackbar(attachFailedMsg)
330+ val photoPicker = rememberLauncherForActivityResult(
331+ ActivityResultContracts.PickMultipleVisualMedia(NetworkConfig.maxAttachments),
332+ ) { uris -> stageUris(uris) }
334+ val filePicker = rememberLauncherForActivityResult(
335+ ActivityResultContracts.GetMultipleContents(),
336+ ) { uris -> stageUris(uris) }
338+ // Uri survives a config change mid-capture so the TakePicture result still resolves.
339+ var pendingCaptureUri by rememberSaveable { mutableStateOf<Uri?>(null) }
340+ val cameraLauncher = rememberLauncherForActivityResult(
341+ ActivityResultContracts.TakePicture(),
343+ val uri = pendingCaptureUri
344+ pendingCaptureUri = null
345+ if (success && uri != null) stageUris(listOf(uri))
348+ val voiceLauncher = rememberLauncherForActivityResult(
349+ ActivityResultContracts.StartActivityForResult(),
351+ if (result.resultCode == Activity.RESULT_OK) {
352+ val spoken = result.data
353+ ?.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS)
355+ ?.takeIf { it.isNotBlank() }
356+ if (spoken != null) {
357+ // Append to the existing draft rather than replacing, so dictation adds to
358+ // whatever the user already typed.
359+ val current = vm.draft.value
360+ val combined = if (current.isBlank()) spoken else "$current $spoken"
361+ vm.updateDraft(combined.take(NetworkConfig.maxDraftLengthChars))
366+ fun launchCamera() {
367+ val uri = newCameraCaptureUri(appContext)
369+ scope.launch { snackbar.showSnackbar(attachFailedMsg) }
372+ pendingCaptureUri = uri
373+ runCatching { cameraLauncher.launch(uri) }
374+ .onFailure { pendingCaptureUri = null; scope.launch { snackbar.showSnackbar(noCameraMsg) } }
378+ val intent = Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH).apply {
379+ putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM)
380+ putExtra(RecognizerIntent.EXTRA_PROMPT, voicePrompt)
382+ runCatching { voiceLauncher.launch(intent) }
383+ .onFailure { scope.launch { snackbar.showSnackbar(noVoiceMsg) } }
386+ // A freshly-created share link is copied to the clipboard so the user can paste it right away.
387+ LaunchedEffect(Unit) {
388+ vm.shareLinkEvents.collect { url ->
389+ copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_share), url)
390+ snackbar.showSnackbar(linkCopiedMsg)
394+ // Navigate to a session freshly branched from a message (branchFrom), once it's created.
395+ // Keyed on Unit (like the sibling one-shot collectors above): keying on the onOpenSession
396+ // lambda would cancel/restart this collector whenever the lambda's identity changes, risking
397+ // a dropped branch-navigation event in the gap.
398+ val branchedMsg = stringResource(R.string.branch_created)
399+ LaunchedEffect(Unit) {
400+ vm.branchEvents.collect { newId ->
401+ showToast(shareContext, branchedMsg)
402+ onOpenSession?.invoke(newId)
406+ // Stage images shared into the app (via the system share sheet) as attachments.
407+ // Keyed on pendingSharedMedia (not Unit) so the effect re-fires when new media arrives
408+ // while this ChatScreen is already composed — which happens in two-pane mode, where the
409+ // detail ChatScreen is persistent (keyed on sessionId) and a LaunchedEffect(Unit) would
410+ // only fire on first composition. consumePendingSharedMedia() atomically drains the
411+ // pending list (compareAndSet to empty), so re-firing on the now-empty value is a no-op.
412+ val pendingSharedMedia by container.pendingSharedMedia.collectAsStateWithLifecycle()
413+ LaunchedEffect(pendingSharedMedia) {
414+ val shared = container.consumePendingSharedMedia()
415+ if (shared.isNotEmpty()) stageUris(shared.map { Uri.parse(it) })
419+ if (vm.send(draft)) {
420+ // TextHandleMove (a light tick) is semantically right for a send commit;
421+ // LongPress is reserved for long-press/swipe gestures.
422+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
426+ BackHandler(enabled = running && !showModelPicker && !showAgentPicker && !showCommandPicker) { showExitConfirm = true }
429+ // Hardware-keyboard shortcuts (tablets / DeX / Chromebooks): Ctrl+K opens the command
430+ // palette; Escape closes it, or stops a run. onPreviewKeyEvent on the Scaffold root sees
431+ // events before the focused text field, but only Ctrl+K / Escape are consumed so normal
432+ // typing (and the composer's own Enter-to-send handling) is untouched.
433+ modifier = Modifier.onPreviewKeyEvent { ev ->
434+ if (ev.type != KeyEventType.KeyDown) return@onPreviewKeyEvent false
436+ ev.isCtrlPressed && ev.key == Key.K -> { showPalette = true; true }
437+ ev.key == Key.Escape && showPalette -> { showPalette = false; true }
438+ ev.key == Key.Escape && running && !showStopConfirm && !showExitConfirm -> {
439+ showStopConfirm = true; true
447+ val changeLabel = stringResource(R.string.change_model_agent)
448+ // The subtitle reads "model · agent", so tapping the title offers *both*
449+ // — a small menu picks which picker to open. Previously the tap went
450+ // straight to the model picker, leaving the agent changeable only via
451+ // the overflow menu despite the title implying otherwise.
454+ // mergeDescendants so TalkBack reads the title/subtitle Texts as one
455+ // node; the click label rides on `clickable` (onClickLabel) instead of
456+ // an explicit contentDescription, which would have SUPPRESSED the child
457+ // Texts and announced only "Change model and agent".
460+ enabled = models.isNotEmpty(),
462+ onClickLabel = changeLabel,
463+ ) { showTitleMenu = true }
464+ .semantics(mergeDescendants = true) {},
465+ verticalAlignment = Alignment.CenterVertically,
467+ Column(modifier = Modifier.weight(1f, fill = false)) {
468+ // maxLines=1 + Ellipsis so a long session title can't wrap and
469+ // push the top bar to multiple lines, shifting the whole layout.
471+ sessionTitle ?: sessionLabel,
473+ overflow = TextOverflow.Ellipsis,
477+ style = MaterialTheme.typography.labelSmall,
478+ color = MaterialTheme.colorScheme.onSurfaceVariant,
480+ overflow = TextOverflow.Ellipsis,
483+ // Visual affordance that the title is tappable; without it the
484+ // title is indistinguishable from plain text and the pickers are
485+ // effectively undiscoverable.
486+ if (models.isNotEmpty()) {
488+ Icons.Filled.KeyboardArrowDown,
489+ contentDescription = null,
490+ tint = MaterialTheme.colorScheme.onSurfaceVariant,
491+ modifier = Modifier.size(20.dp),
495+ DropdownMenu(expanded = showTitleMenu, onDismissRequest = { showTitleMenu = false }) {
497+ text = { Text(stringResource(R.string.palette_switch_model)) },
498+ enabled = !modelsLoading || models.isNotEmpty(),
499+ onClick = { showTitleMenu = false; showModelPicker = true },
502+ text = { Text(stringResource(R.string.palette_choose_agent)) },
503+ enabled = !agentsLoading || agents.isNotEmpty(),
504+ onClick = { showTitleMenu = false; showAgentPicker = true },
510+ IconButton(onClick = {
511+ if (running) showExitConfirm = true else onBack()
513+ Icon(Icons.AutoMirrored.Filled.ArrowBack, contentDescription = stringResource(R.string.back))
517+ // At-a-glance run status in the top bar. When the user is scrolled
518+ // up (jump-to-latest FAB visible), the input-bar Stop button and the
519+ // trailing "working…" row are off-screen, so a top-bar spinner is the
520+ // only signal the agent is still working.
522+ val workingLabel = stringResource(R.string.working)
523+ CircularProgressIndicator(
524+ Modifier.size(18.dp).semantics { contentDescription = workingLabel },
528+ // Manual refresh: forces an SSE reconnect, which re-seeds messages
529+ // from REST. A recovery path when the stream silently drops and the
530+ // auto-reconnect re-seed is slow or fails. Shows a brief spinner as
531+ // immediate tap feedback — the SSE reconnect may not visibly change
532+ // the connection state when already Connected, so without it the tap
533+ // appears to do nothing.
534+ val refreshLabel = stringResource(R.string.refresh)
536+ onClick = { vm.refreshMessages() },
537+ enabled = activeConnection != null && !refreshing,
540+ CircularProgressIndicator(
541+ Modifier.size(18.dp).semantics { contentDescription = refreshLabel },
545+ Icon(Icons.Filled.Refresh, contentDescription = refreshLabel)
548+ // Overflow menu consolidates the less-frequent actions (share,
549+ // commands, agent, model, rename, delete) so the top bar stays
550+ // scannable on narrow phones — previously 5 icons crowded the bar
551+ // alongside the back button and tappable title. Catalog-loading
552+ // spinners stay inline (next to the overflow) so a load state is
553+ // visible without opening the menu.
554+ val moreLabel = stringResource(R.string.more)
555+ val loadingLabel = stringResource(R.string.loading)
556+ val shareLabel = stringResource(R.string.share_conversation)
557+ val commandsLabel = stringResource(R.string.commands)
558+ val renameLabel = stringResource(R.string.rename_session_chat)
559+ val deleteLabel = stringResource(R.string.delete_session_chat)
560+ val createShareLabel = stringResource(R.string.create_share_link)
561+ val copyShareLabel = stringResource(R.string.copy_share_link)
562+ val stopShareLabel = stringResource(R.string.stop_sharing)
563+ val summarizeLabel = stringResource(R.string.summarize_conversation)
564+ val initLabel = stringResource(R.string.generate_agents_md)
565+ val shellLabel = stringResource(R.string.run_shell_command)
567+ IconButton(onClick = { showOverflowMenu = true }) {
568+ Icon(Icons.Filled.MoreVert, contentDescription = moreLabel)
571+ expanded = showOverflowMenu,
572+ onDismissRequest = { showOverflowMenu = false },
575+ text = { Text(shareLabel) },
576+ enabled = hasMessages,
578+ showOverflowMenu = false
580+ val md = withContext(Dispatchers.Default) {
581+ buildConversationMarkdown(vm.messages.value, sessionTitle)
583+ val send = android.content.Intent(android.content.Intent.ACTION_SEND).apply {
584+ type = "text/markdown"
585+ putExtra(android.content.Intent.EXTRA_SUBJECT, sessionTitle ?: defaultShareSubject)
586+ putExtra(android.content.Intent.EXTRA_TEXT, md)
588+ runCatchingCancellable { shareContext.startActivity(android.content.Intent.createChooser(send, shareLabel)) }
589+ .onFailure { showToast(shareContext, shareContext.getString(R.string.no_share_app)) }
594+ text = { Text(commandsLabel) },
595+ enabled = !commandsLoading || commands.isNotEmpty(),
596+ onClick = { showOverflowMenu = false; showCommandPicker = true },
598+ androidx.compose.material3.HorizontalDivider()
599+ // Session sharing: create a public link, copy an existing one, or revoke it.
600+ if (shareUrl == null) {
602+ text = { Text(createShareLabel) },
603+ enabled = hasMessages,
604+ onClick = { showOverflowMenu = false; vm.shareSession() },
608+ text = { Text(copyShareLabel) },
610+ showOverflowMenu = false
612+ copyToClipboard(shareContext, shareContext.getString(R.string.clip_label_share), it)
613+ scope.launch { snackbar.showSnackbar(linkCopiedMsg) }
618+ text = { Text(stopShareLabel) },
619+ onClick = { showOverflowMenu = false; vm.unshareSession() },
623+ text = { Text(summarizeLabel) },
624+ enabled = hasMessages && !running,
625+ onClick = { showOverflowMenu = false; showSummarizeConfirm = true },
628+ text = { Text(initLabel) },
630+ onClick = { showOverflowMenu = false; showInitConfirm = true },
633+ text = { Text(shellLabel) },
635+ onClick = { showOverflowMenu = false; showShellDialog = true },
637+ androidx.compose.material3.HorizontalDivider()
639+ text = { Text(renameLabel) },
640+ onClick = { showOverflowMenu = false; showRenameDialog = true },
643+ text = { Text(deleteLabel, color = MaterialTheme.colorScheme.error) },
644+ onClick = { showOverflowMenu = false; showDeleteDialog = true },
647+ // While a catalog is initially loading (empty list + loading flag),
648+ // show a tiny inline spinner beside the overflow so the user can see
649+ // a load is in progress without opening the menu. Once loaded the
650+ // spinner disappears; the menu items are always enabled (tapping a
651+ // picker with no items shows the "no models/agents/commands" state).
652+ val catalogLoading = (commandsLoading && commands.isEmpty()) ||
653+ (agentsLoading && agents.isEmpty()) ||
654+ (modelsLoading && models.isEmpty())
655+ if (catalogLoading) {
656+ CircularProgressIndicator(
658+ .align(Alignment.TopEnd)
660+ .semantics { contentDescription = loadingLabel },
668+ snackbarHost = { SnackbarHost(snackbar) },
670+ val queuedFollowUp by vm.queuedFollowUp.collectAsStateWithLifecycle()
671+ val todoPlan by vm.todoPlan.collectAsStateWithLifecycle()
672+ val queuedOffline by vm.outbox.collectAsStateWithLifecycle()
673+ val outboxSending by container.outboxSending.collectAsStateWithLifecycle()
675+ // Pinned above the composer so the agent's plan and progress stay visible
676+ // while scrolled up mid-run; renders nothing when there's no plan.
677+ TodoPlanBar(todoPlan)
678+ AnimatedVisibility(visible = reverted) {
679+ RevertBanner(onUndo = { vm.unrevert() })
681+ AnimatedVisibility(visible = queuedOffline.isNotEmpty()) {
683+ count = queuedOffline.size,
684+ sending = outboxSending,
685+ onFlush = { vm.flushQueued() },
686+ onDiscard = { vm.discardAllQueued() },
691+ onValueChange = vm::updateDraft,
693+ aborting = aborting,
694+ enabled = activeConnection != null,
695+ sendOnEnter = sendOnEnter,
697+ onAbort = { showStopConfirm = true },
698+ queuedFollowUp = queuedFollowUp,
699+ onQueueFollowUp = vm::queueFollowUp,
700+ onCancelQueue = { vm.queueFollowUp("") },
701+ focusRequester = inputFocusRequester,
702+ attachments = attachments,
703+ staging = stagingCount > 0,
704+ onRemoveAttachment = vm::removeAttachment,
707+ PickVisualMediaRequest(ActivityResultContracts.PickVisualMedia.ImageOnly),
710+ onPickFile = { filePicker.launch("*/*") },
711+ onCamera = { launchCamera() },
712+ onVoice = { launchVoice() },
717+ // Collect messages inside the content lambda so streaming token updates
718+ // recompose only this subtree, not the top bar / input bar / 20+ other
719+ // state reads in the ChatScreen body.
720+ val messages by vm.messages.collectAsStateWithLifecycle()
721+ val optimisticStatuses by vm.optimisticStatuses.collectAsStateWithLifecycle()
722+ val listState = rememberLazyListState()
723+ val contentScope = rememberCoroutineScope()
724+ val timeTick = rememberRelativeTimeTick()
725+ // Dismiss the soft keyboard when the user scrolls the message list, a standard Android
726+ // chat affordance for reading while the IME is open. Watching isScrollInProgress via
727+ // snapshotFlow avoids wiring a nested scroll connection and fires on any scroll gesture.
728+ val keyboardController = androidx.compose.ui.platform.LocalSoftwareKeyboardController.current
729+ androidx.compose.runtime.LaunchedEffect(listState) {
730+ androidx.compose.runtime.snapshotFlow { listState.isScrollInProgress }
731+ .distinctUntilChanged()
732+ .collect { scrolling -> if (scrolling) keyboardController?.hide() }
733+ } // Group messages by day and interleave date separators so a long conversation
734+ // has visual "Today"/"Yesterday"/date breaks. Computed once per messages
735+ // emission (memoized) so a scroll-induced recomposition doesn't re-scan. Lives
736+ // outside the PullToRefreshBox so the auto-scroll effects below can reference
737+ // the same list the LazyColumn renders (separators shift the indices vs. the
738+ // raw messages list, so scroll targets must be in listItems space).
739+ val todayLabel = stringResource(R.string.today)
740+ val yesterdayLabel = stringResource(R.string.yesterday)
741+ val listItems = remember(messages, todayLabel, yesterdayLabel) {
742+ buildMessageListItems(messages, todayLabel, yesterdayLabel)
744+ // listItems is a plain (non-snapshot) local, rebuilt each recomposition. The
745+ // derivedStateOf and snapshotFlow lambdas below are created once (keyless
746+ // remember / LaunchedEffect(Unit)); reading `listItems` directly inside them
747+ // would capture the first composition's list — which is empty, since `messages`
748+ // starts empty — freezing it forever. That pinned isPinnedToBottom at true and
749+ // AutoScrollSignal.size at 0, breaking streaming auto-scroll and the
750+ // jump-to-latest FAB. rememberUpdatedState hands those lambdas a stable State
751+ // whose value tracks the latest list.
752+ val currentListItems by rememberUpdatedState(listItems)
754+ // New-content signal for the jump-to-latest FAB: set when content grows while the user
755+ // is scrolled away from the bottom, cleared once they return (see the collector below).
756+ var hasNewContent by remember { mutableStateOf(false) }
758+ val isPinnedToBottom by remember {
760+ val lastVisible = listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: -1
761+ // When a run is active, the LazyColumn has one trailing "__typing"
762+ // item after the last list item. Account for it so "pinned to bottom"
763+ // includes the working indicator — otherwise the pin check targets
764+ // listItems.lastIndex, the typing row sits just below the viewport,
765+ // and the user never sees the progress indicator even when pinned.
766+ val items = currentListItems
767+ val effectiveLast = if (running) items.size else items.lastIndex
768+ lastVisible >= effectiveLast || items.isEmpty()
772+ // Jump to the newest message once, when the conversation first loads. Guarded by a
773+ // saveable one-shot flag so it doesn't re-fire on recomposition after a config change
774+ // (rotation) — rememberLazyListState restores the user's scroll offset, and an
775+ // unconditional scrollToItem here would clobber it, snapping them back to the bottom.
776+ var didInitialScroll by rememberSaveable { mutableStateOf(false) }
777+ LaunchedEffect(listItems.isNotEmpty()) {
778+ if (listItems.isNotEmpty() && !didInitialScroll) {
779+ // When a run is active the LazyColumn has a trailing "__typing" row at
780+ // listItems.size; target it (not listItems.lastIndex) so deep-linking into a
781+ // running session lands truly pinned to bottom and streaming auto-scroll engages.
782+ listState.scrollToItem(if (running) listItems.size else listItems.lastIndex)
783+ didInitialScroll = true
787+ // When a run starts, the LazyColumn gains a trailing "__typing" row, so
788+ // effectiveLast jumps from listItems.lastIndex to listItems.size and the
789+ // isPinnedToBottom check flips to false the instant you send — freezing
790+ // auto-scroll. If the user was pinned to the last item just before the run
791+ // began, bring the typing row into view so the pin (and streaming follow) is
792+ // preserved. Guard on the raw last-visible index (isPinnedToBottom has already
793+ // recomputed to false by now) so we don't scroll when the user had scrolled up.
794+ LaunchedEffect(running) {
795+ if (running && listItems.isNotEmpty()) {
796+ val lastVisible = listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: -1
797+ if (lastVisible >= listItems.lastIndex) {
798+ runCatchingCancellable { listState.animateScrollToItem(listItems.size) }
803+ LaunchedEffect(Unit) {
807+ // Track list size + the streaming length of the last part so we auto-scroll
808+ // as content arrives, plus the pinned flag. A small data class with primitive
809+ // fields avoids the per-frame boxing that Triple<Int,Int,Boolean> pays
810+ // (snapshotFlow re-evaluates this lambda every snapshot), and reading only the
811+ // last part's length is O(1) vs. a sumOf over every part. Covering reasoning
812+ // and tool output — not just TextPart — keeps a pinned view following a long
813+ // reasoning/tool block while it streams (previously it stalled at 0).
814+ val lastLen = streamingContentLength(messages.lastOrNull()?.parts?.lastOrNull())
815+ AutoScrollSignal(currentListItems.size, lastLen, isPinnedToBottom)
816+ }.collect { signal ->
817+ if (signal.pinned) {
818+ // Back at the bottom: clear the new-content badge.
819+ hasNewContent = false
820+ if (signal.size > 0) {
821+ // Scroll to the effective last index, including the trailing
822+ // "__typing" row when a run is active so the working indicator
823+ // is brought into view (not just the last message).
824+ val items = currentListItems
825+ val target = if (running) items.size else items.lastIndex
826+ listState.scrollToItem(target)
828+ } else if (signal.size > prevSize || signal.lastTextLength > prevLen) {
829+ // Content arrived while scrolled up — badge the jump-to-latest FAB.
830+ hasNewContent = true
832+ prevSize = signal.size
833+ prevLen = signal.lastTextLength
837+ CompositionLocalProvider(LocalRelativeTimeTick provides timeTick) {
838+ // The bottomBar (ChatInputBar) already has imePadding, and the Scaffold's
839+ // content padding accounts for the bottomBar's raised height, so the message
840+ // list is already above the keyboard. Adding imePadding here would double-apply
841+ // the IME inset and push messages too far up.
842+ Box(modifier = Modifier.fillMaxSize().padding(padding)) {
843+ if (activeConnection == null) {
845+ modifier = Modifier.align(Alignment.Center).padding(24.dp),
846+ horizontalAlignment = Alignment.CenterHorizontally,
849+ stringResource(R.string.not_connected),
850+ color = MaterialTheme.colorScheme.error,
852+ Spacer(Modifier.size(12.dp))
853+ Button(onClick = { vm.reconnect() }, enabled = !reconnecting) {
855+ CircularProgressIndicator(
856+ Modifier.size(20.dp),
857+ color = MaterialTheme.colorScheme.onPrimary,
861+ Text(stringResource(R.string.reconnect))
867+ state = connectionState,
868+ modifier = Modifier.align(Alignment.TopCenter),
869+ isOnline = isOnline,
870+ // On a hard failure, retry by forcing an SSE reconnect (which
871+ // re-seeds from REST). refreshMessages is the right recovery path
872+ // when the connection is present but the stream died; reconnect()
873+ // is the path when the whole connection is gone (handled by the
874+ // separate "Not connected" state below).
875+ onRetry = { vm.refreshMessages() },
877+ // Pull-to-refresh wraps ALL content states (loading, error, empty, list) so
878+ // recovery is a swipe away everywhere — not just when the message list is
879+ // populated. Previously PTR was only around the populated list, leaving the
880+ // error/loading states reachable only via a button tap.
882+ isRefreshing = refreshing,
883+ onRefresh = { vm.refreshMessages() },
884+ // Cap width and center on large screens for readability — full-width
885+ // bubbles stretch edge-to-edge on tablets, hurting line-length comfort.
886+ modifier = Modifier.fillMaxSize().wrapContentWidth(Alignment.CenterHorizontally)
887+ .widthIn(max = NetworkConfig.chatContentMaxWidthDp.dp),
889+ // Reserve top space when the banner is visible so it doesn't overlap the
890+ // first message / state content.
891+ val bannerVisible = !isOnline || connectionState != EventStreamClient.ConnectionState.Connected
892+ val topPad = if (bannerVisible) 44.dp else 16.dp
893+ if (loading && messages.isEmpty()) {
894+ val loadingLabel = stringResource(R.string.loading)
895+ // Attach the a11y label directly to the spinner (a detached zero-size Box
896+ // isn't reliably focused/announced by TalkBack) and show a visible label so
897+ // sighted users get "Loading…" rather than a bare spinner.
899+ modifier = Modifier.align(Alignment.Center).padding(top = topPad),
900+ horizontalAlignment = Alignment.CenterHorizontally,
902+ CircularProgressIndicator(
903+ Modifier.semantics { contentDescription = loadingLabel },
906+ Spacer(Modifier.size(8.dp))
909+ style = MaterialTheme.typography.labelMedium,
910+ color = MaterialTheme.colorScheme.onSurfaceVariant,
913+ } else if (loadError && messages.isEmpty()) {
914+ // A failed load with nothing to show. Distinct from the empty
915+ // conversation state below — the conversation isn't empty, it
916+ // failed to load, and offering "Start a conversation" here is
917+ // misleading. Offer a Retry instead, mirroring SessionListScreen.
919+ modifier = Modifier.align(Alignment.Center).padding(top = topPad).padding(24.dp),
920+ horizontalAlignment = Alignment.CenterHorizontally,
923+ stringResource(R.string.load_messages_failed),
924+ color = MaterialTheme.colorScheme.error,
926+ Spacer(Modifier.size(12.dp))
927+ Button(onClick = { vm.refreshMessages() }) {
928+ Text(stringResource(R.string.retry))
931+ } else if (messages.isEmpty() && running) {
932+ // A run just started but no parts have arrived yet — the empty
933+ // list with only the trailing "working…" row looks broken, so
934+ // surface a clear starting state until the first part streams in.
935+ val workingText = stringResource(R.string.working)
937+ modifier = Modifier.align(Alignment.Center).padding(top = topPad).padding(24.dp),
938+ horizontalAlignment = Alignment.CenterHorizontally,
940+ CircularProgressIndicator(Modifier.size(28.dp), strokeWidth = 3.dp)
941+ Spacer(Modifier.size(12.dp))
942+ Text(workingText, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurfaceVariant)
944+ } else if (messages.isEmpty()) {
948+ // Focus the input so the user can edit the suggestion before
949+ // sending, instead of having to manually tap the field.
950+ runCatching { inputFocusRequester.requestFocus() }
952+ modifier = Modifier.align(Alignment.Center).padding(top = topPad),
955+ val lastMessageId = messages.lastOrNull()?.info?.id
956+ // Text-to-speech for reading assistant replies aloud; shuts down when the
957+ // message list leaves composition.
958+ val tts = rememberTtsController()
959+ val speakingMessageId by tts.speakingId
962+ modifier = Modifier.fillMaxSize(),
963+ // Extra bottom padding reserves room for the jump-to-latest FAB so it
964+ // never floats over the last message. Top padding grows when the
965+ // connection banner is visible so it doesn't overlap the first message.
966+ contentPadding = PaddingValues(
970+ bottom = 16.dp + NetworkConfig.chatListFabInsetDp.dp,
972+ verticalArrangement = Arrangement.spacedBy(16.dp),
977+ contentType = { it.contentType },
979+ // Default placement animation so inserted/moved rows glide in. Kept to the
980+ // default (no heavy fade spec) so a streaming message growing in place
981+ // doesn't animate on every token.
982+ Box(Modifier.animateItem()) {
984+ is MessageListItem.Separator -> DateSeparator(item.label)
985+ is MessageListItem.Message -> {
986+ val message = item.message
987+ // Only the last (streaming) message needs isRunning — it drives the
988+ // reasoning-block spinner. Passing the live flag to every bubble
989+ // makes all visible messages recompose whenever a run starts or stops.
990+ val modelLabel = remember(message.info, models) {
991+ (message.info as? soy.iko.opencode.data.model.AssistantMessage)
992+ ?.let { resolveModelLabel(it, models) }
996+ isRunning = running && message.info.id == lastMessageId,
997+ imageContext = imageContext,
998+ modelLabel = modelLabel,
999+ onOpenFile = onOpenFile,
1000+ onRevert = { vm.revertTo(message.info.id) },
1002+ // editMessage reverts to before this message (hiding it and
1003+ // everything after); the revert banner surfaces the rewind
1004+ // with an Undo. Focus + scroll the composer into view like the
1005+ // Quote action so the prefilled draft isn't off-screen.
1006+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1007+ vm.editMessage(message.info.id, text)
1008+ runCatching { inputFocusRequester.requestFocus() }
1009+ contentScope.launch {
1010+ runCatchingCancellable {
1011+ listState.animateScrollToItem(listItems.lastIndex.coerceAtLeast(0))
1015+ onSpeak = { text -> tts.toggle(message.info.id, text) },
1016+ isSpeaking = message.info.id == speakingMessageId,
1017+ onQuote = { text ->
1018+ vm.quoteReply(text)
1019+ runCatching { inputFocusRequester.requestFocus() }
1021+ onBranch = { text -> vm.branchFrom(text) },
1022+ sendStatus = optimisticStatuses[message.info.id]?.let { failed ->
1023+ if (failed) soy.iko.opencode.ui.chat.MessageSendStatus.FAILED
1024+ else soy.iko.opencode.ui.chat.MessageSendStatus.SENDING
1026+ isEdited = message.info.time?.let { it.updated != null && it.updated != it.created } == true,
1027+ onRetry = optimisticStatuses[message.info.id]?.let { failed ->
1029+ { vm.retryOptimisticMessage(message.info.id) }
1034+ onDismiss = optimisticStatuses[message.info.id]?.let { failed ->
1036+ { vm.dismissOptimistic(message.info.id) }
1047+ item(key = "__typing") {
1048+ val workingText = stringResource(R.string.working)
1050+ verticalAlignment = Alignment.CenterVertically,
1051+ modifier = Modifier.semantics {
1052+ contentDescription = workingText
1055+ CircularProgressIndicator(Modifier.size(16.dp), strokeWidth = 2.dp)
1056+ Text(workingText, style = MaterialTheme.typography.labelMedium, modifier = Modifier.padding(start = 6.dp))
1063+ // Jump-to-latest affordance when the user has scrolled away during a stream.
1064+ AnimatedVisibility(
1065+ visible = !isPinnedToBottom && listItems.isNotEmpty(),
1066+ modifier = Modifier.align(Alignment.BottomEnd),
1068+ // Badge the FAB when new content arrived while the user was scrolled up, so
1069+ // they know there's something new to jump to (cleared once back at bottom).
1072+ if (hasNewContent) {
1073+ val newContentLabel = stringResource(R.string.new_messages)
1074+ Badge(modifier = Modifier.semantics { contentDescription = newContentLabel })
1077+ modifier = Modifier.padding(end = 16.dp, bottom = 16.dp),
1079+ ExtendedFloatingActionButton(
1081+ hasNewContent = false
1082+ if (listItems.isNotEmpty()) {
1083+ // Scroll to the effective last index, including the
1084+ // trailing "__typing" row when a run is active.
1085+ val target = if (running) listItems.size else listItems.lastIndex
1086+ contentScope.launch { runCatchingCancellable { listState.animateScrollToItem(target) } }
1089+ // contentDescription null: the visible "Latest" text already labels
1090+ // the FAB, so a description here makes TalkBack announce "Latest" twice.
1091+ icon = { Icon(Icons.Filled.KeyboardArrowDown, contentDescription = null) },
1092+ text = { Text(stringResource(R.string.latest)) },
1096+ // Scroll-to-top affordance: a small FAB at the start edge, visible when the
1097+ // user has scrolled down past the first few messages. Symmetric to the
1098+ // jump-to-latest FAB, for long conversations where manual fling back is tedious.
1099+ val scrolledDown by remember {
1100+ derivedStateOf { listState.firstVisibleItemIndex > 0 || listState.firstVisibleItemScrollOffset > 200 }
1102+ AnimatedVisibility(
1103+ visible = scrolledDown && listItems.size > 4,
1104+ modifier = Modifier.align(Alignment.BottomStart),
1106+ SmallFloatingActionButton(
1108+ contentScope.launch { runCatchingCancellable { listState.animateScrollToItem(0) } }
1110+ modifier = Modifier.padding(start = 16.dp, bottom = 16.dp),
1113+ Icons.Filled.KeyboardArrowUp,
1114+ contentDescription = stringResource(R.string.scroll_to_top),
1123+ if (showExitConfirm) {
1125+ onDismissRequest = { showExitConfirm = false },
1126+ title = { Text(stringResource(R.string.stop_and_exit_title)) },
1127+ text = { Text(stringResource(R.string.stop_and_exit_text)) },
1129+ TextButton(onClick = {
1130+ showExitConfirm = false
1131+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1134+ }) { Text(stringResource(R.string.stop_and_exit)) }
1137+ TextButton(onClick = { showExitConfirm = false }) { Text(stringResource(R.string.stay)) }
1142+ if (showStopConfirm) {
1144+ onDismissRequest = { showStopConfirm = false },
1145+ title = { Text(stringResource(R.string.stop_run_title)) },
1146+ text = { Text(stringResource(R.string.stop_run_text)) },
1148+ TextButton(onClick = {
1149+ showStopConfirm = false
1150+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.TextHandleMove)
1152+ }) { Text(stringResource(R.string.stop), color = MaterialTheme.colorScheme.error) }
1155+ TextButton(onClick = { showStopConfirm = false }) { Text(stringResource(R.string.cancel)) }
1160+ if (showSummarizeConfirm) {
1162+ onDismissRequest = { showSummarizeConfirm = false },
1163+ title = { Text(stringResource(R.string.summarize_confirm_title)) },
1164+ text = { Text(stringResource(R.string.summarize_confirm_text)) },
1166+ TextButton(onClick = {
1167+ showSummarizeConfirm = false
1169+ }) { Text(stringResource(R.string.action_continue)) }
1172+ TextButton(onClick = { showSummarizeConfirm = false }) { Text(stringResource(R.string.cancel)) }
1177+ if (showInitConfirm) {
1179+ onDismissRequest = { showInitConfirm = false },
1180+ title = { Text(stringResource(R.string.init_confirm_title)) },
1181+ text = { Text(stringResource(R.string.init_confirm_text)) },
1183+ TextButton(onClick = {
1184+ showInitConfirm = false
1186+ }) { Text(stringResource(R.string.action_continue)) }
1189+ TextButton(onClick = { showInitConfirm = false }) { Text(stringResource(R.string.cancel)) }
1194+ if (showRenameDialog) {
1195+ RenameSessionChatDialog(
1196+ initialTitle = sessionTitle ?: "",
1197+ onDismiss = { showRenameDialog = false },
1198+ onConfirm = { newName ->
1199+ showRenameDialog = false
1200+ vm.renameSession(newName)
1205+ if (showDeleteDialog) {
1207+ onDismissRequest = { showDeleteDialog = false },
1208+ title = { Text(stringResource(R.string.delete_session_chat_title)) },
1209+ text = { Text(stringResource(R.string.delete_session_chat_text, sessionTitle ?: sessionLabel)) },
1211+ TextButton(onClick = {
1212+ showDeleteDialog = false
1213+ haptics.performHapticFeedback(androidx.compose.ui.hapticfeedback.HapticFeedbackType.LongPress)
1215+ }) { Text(stringResource(R.string.delete), color = MaterialTheme.colorScheme.error) }
1218+ TextButton(onClick = { showDeleteDialog = false }) { Text(stringResource(R.string.cancel)) }
1223+ if (showShellDialog) {
1224+ ShellCommandDialog(
1225+ onDismiss = { showShellDialog = false },
1227+ showShellDialog = false
1233+ if (showModelPicker) {
1236+ selected = selectedModel,
1237+ loading = modelsLoading,
1238+ error = modelsError,
1239+ onSelect = { vm.selectModel(it) },
1240+ onRetry = { vm.reloadModels() },
1241+ onDismiss = { showModelPicker = false },
1245+ if (showAgentPicker) {
1248+ selected = selectedAgent,
1249+ loading = agentsLoading,
1250+ error = agentsError,
1251+ onSelect = { vm.selectAgent(it?.name) },
1252+ onRetry = { vm.reloadAgents() },
1253+ onDismiss = { showAgentPicker = false },
1257+ if (showCommandPicker) {
1258+ CommandPickerSheet(
1259+ commands = commands,
1260+ loading = commandsLoading,
1261+ error = commandsError,
1262+ onSelect = { vm.runCommand(it) },
1263+ onRetry = { vm.reloadCommands() },
1264+ onDismiss = { showCommandPicker = false },
1268+ pendingPermission?.let { permission ->
1270+ permission = permission,
1271+ position = permissionProgress.position,
1272+ total = permissionProgress.total,
1273+ onRespond = { response -> vm.respondPermission(permission, response) },
1278+ CommandPalette(actions = paletteActions, onDismiss = { showPalette = false })
1283+private fun ChatInputBar(
1285+ onValueChange: (String) -> Unit,
1289+ sendOnEnter: Boolean,
1290+ onSend: () -> Unit,
1291+ onAbort: () -> Unit,
1292+ queuedFollowUp: String?,
1293+ onQueueFollowUp: (String) -> Unit,
1294+ onCancelQueue: () -> Unit,
1295+ focusRequester: androidx.compose.ui.focus.FocusRequester,
1296+ attachments: List<PendingAttachment>,
1298+ onRemoveAttachment: (String) -> Unit,
1299+ onPickPhoto: () -> Unit,
1300+ onPickFile: () -> Unit,
1301+ onCamera: () -> Unit,
1302+ onVoice: () -> Unit,
1304+ // Sendable when there's text OR at least one attachment (an image-only prompt is valid).
1305+ val hasContent = value.isNotBlank() || attachments.isNotEmpty()
1306+ // Full-screen editor state: opened when the user wants more space for a long prompt.
1307+ var showFullScreenEditor by rememberSaveable { mutableStateOf(false) }
1308+ Surface(tonalElevation = 3.dp, modifier = Modifier.imePadding()) {
1309+ Column(modifier = Modifier.fillMaxWidth().windowInsetsPadding(WindowInsets.navigationBars)) {
1310+ // A queued follow-up replaces the Stop button with a "queued" chip so the
1311+ // user sees their message will be sent when the run finishes, and can cancel.
1312+ if (queuedFollowUp != null) {
1314+ modifier = Modifier
1316+ .padding(start = 12.dp, top = 6.dp, end = 4.dp),
1317+ verticalAlignment = Alignment.CenterVertically,
1319+ Column(modifier = Modifier.weight(1f)) {
1321+ stringResource(R.string.queued),
1322+ style = MaterialTheme.typography.labelSmall,
1323+ color = MaterialTheme.colorScheme.onSurfaceVariant,
1327+ style = MaterialTheme.typography.bodySmall,
1328+ color = MaterialTheme.colorScheme.onSurfaceVariant,
1330+ overflow = TextOverflow.Ellipsis,
1333+ TextButton(onClick = onCancelQueue, contentPadding = androidx.compose.foundation.layout.PaddingValues(horizontal = 8.dp)) {
1334+ Text(stringResource(R.string.cancel))
1338+ // Staged attachments: horizontally-scrollable thumbnails/chips, each removable.
1339+ AttachmentStrip(attachments, onRemove = onRemoveAttachment, staging = staging)
1341+ modifier = Modifier.fillMaxWidth().padding(8.dp),
1342+ verticalAlignment = Alignment.Bottom,
1344+ // Attach menu: photo picker, camera, or any file.
1345+ var showAttachMenu by remember { mutableStateOf(false) }
1347+ IconButton(onClick = { showAttachMenu = true }, enabled = enabled) {
1348+ Icon(Icons.Filled.Add, contentDescription = stringResource(R.string.add_attachment))
1350+ DropdownMenu(expanded = showAttachMenu, onDismissRequest = { showAttachMenu = false }) {
1352+ leadingIcon = { Icon(Icons.Filled.PhotoLibrary, contentDescription = null) },
1353+ text = { Text(stringResource(R.string.attach_photo)) },
1354+ onClick = { showAttachMenu = false; onPickPhoto() },
1357+ leadingIcon = { Icon(Icons.Filled.PhotoCamera, contentDescription = null) },
1358+ text = { Text(stringResource(R.string.attach_camera)) },
1359+ onClick = { showAttachMenu = false; onCamera() },
1362+ leadingIcon = { Icon(Icons.Filled.Description, contentDescription = null) },
1363+ text = { Text(stringResource(R.string.attach_file)) },
1364+ onClick = { showAttachMenu = false; onPickFile() },
1368+ // Voice dictation: appends recognized speech to the draft.
1369+ IconButton(onClick = onVoice, enabled = enabled) {
1370+ Icon(Icons.Filled.Mic, contentDescription = stringResource(R.string.voice_input))
1372+ // Expand to a full-screen editor for long prompts (the inline field caps at 6 lines).
1373+ IconButton(onClick = { showFullScreenEditor = true }, enabled = enabled) {
1374+ Icon(Icons.Filled.Expand, contentDescription = stringResource(R.string.expand_editor))
1378+ onValueChange = { v ->
1379+ // Cap input length so a huge paste can't stall the UI. Shares are
1380+ // capped separately in MainActivity; this guards typed/pasted drafts.
1381+ onValueChange(v.take(NetworkConfig.maxDraftLengthChars))
1383+ modifier = Modifier
1385+ .focusRequester(focusRequester)
1386+ .testTag("chat_input")
1387+ .onPreviewKeyEvent { event ->
1388+ if (event.type != KeyEventType.KeyDown || event.key != Key.Enter) return@onPreviewKeyEvent false
1389+ // With "Send on Enter" on, Enter sends (Shift+Enter newlines).
1390+ // With it off, Enter inserts a newline and Ctrl+Enter sends.
1391+ val send = enterShouldSend(
1393+ hasContent = hasContent,
1394+ sendOnEnter = sendOnEnter,
1395+ shift = event.isShiftPressed,
1396+ ctrl = event.isCtrlPressed,
1399+ if (running) onQueueFollowUp(value) else onSend()
1405+ // While a run is active a typed message only queues (sends after the run), so
1406+ // the placeholder says so instead of the plain "Message…".
1408+ Text(stringResource(if (running) R.string.composer_hint_running else R.string.message_placeholder))
1412+ // Show a "N / max" countdown once the draft crosses a high fraction of
1413+ // the cap, so the user knows a paste is about to be truncated instead
1414+ // of being silently cut off. Hidden for normal short prompts to avoid
1415+ // clutter under a typical one-line message.
1417+ val threshold = (NetworkConfig.maxDraftLengthChars * NetworkConfig.draftCountdownThresholdFraction).toInt()
1418+ if (value.length >= threshold) {
1421+ R.string.draft_chars_remaining,
1422+ NetworkConfig.maxDraftLengthChars - value.length,
1423+ NetworkConfig.maxDraftLengthChars,
1425+ style = MaterialTheme.typography.labelSmall,
1426+ color = if (value.length >= NetworkConfig.maxDraftLengthChars) MaterialTheme.colorScheme.error
1427+ else MaterialTheme.colorScheme.onSurfaceVariant,
1431+ keyboardOptions = KeyboardOptions(
1432+ // When "Send on Enter" is on, expose ImeAction.Send so the soft
1433+ // keyboard shows a send key — matching the setting's intent and
1434+ // giving touch-only users a keyboard send affordance. When off,
1435+ // ImeAction.Default keeps the enter/newline key for multi-line input.
1436+ imeAction = if (sendOnEnter) ImeAction.Send else ImeAction.Default,
1437+ capitalization = KeyboardCapitalization.Sentences,
1439+ keyboardActions = KeyboardActions(
1441+ if (enabled && hasContent) onSend()
1445+ ComposerTrailingButton(
1447+ aborting = aborting,
1448+ canSend = enabled && hasContent,
1449+ canQueue = enabled && value.isNotBlank(),
1452+ onQueue = { onQueueFollowUp(value) },
1456+ if (showFullScreenEditor) {
1459+ onValueChange = onValueChange,
1460+ onDismiss = { showFullScreenEditor = false },
1461+ onSend = { showFullScreenEditor = false; onSend() },
1462+ canSend = enabled && hasContent,
1468+/** Full-screen editor dialog for composing long prompts. Gives the full viewport height to
1469+ * the text field (vs the inline 6-line cap) with a Send button and a collapse action. */
1470+@OptIn(ExperimentalMaterial3Api::class)
1472+private fun FullScreenEditor(
1474+ onValueChange: (String) -> Unit,
1475+ onDismiss: () -> Unit,
1476+ onSend: () -> Unit,
1479+ androidx.compose.ui.window.Dialog(
1480+ onDismissRequest = onDismiss,
1481+ properties = androidx.compose.ui.window.DialogProperties(usePlatformDefaultWidth = false, decorFitsSystemWindows = false),
1485+ androidx.compose.material3.TopAppBar(
1486+ title = { Text(stringResource(R.string.message_placeholder)) },
1488+ androidx.compose.material3.TextButton(onClick = onDismiss) {
1489+ Text(stringResource(R.string.collapse_editor))
1495+ Surface(tonalElevation = 3.dp) {
1497+ modifier = Modifier.fillMaxWidth().imePadding().padding(12.dp),
1498+ horizontalArrangement = Arrangement.End,
1500+ androidx.compose.material3.Button(onClick = onSend, enabled = canSend) {
1501+ Text(stringResource(R.string.send))
1509+ onValueChange = { v -> onValueChange(v.take(NetworkConfig.maxDraftLengthChars)) },
1510+ modifier = Modifier.fillMaxSize().padding(padding),
1511+ placeholder = { Text(stringResource(R.string.message_placeholder)) },
1512+ maxLines = Int.MAX_VALUE,
1513+ keyboardOptions = KeyboardOptions(imeAction = ImeAction.Default, capitalization = KeyboardCapitalization.Sentences),
1519+/** Whether a hardware Enter keypress should send: never when disabled/empty; otherwise
1520+ * Enter sends (unless Shift) when send-on-Enter is on, else only Ctrl+Enter sends. */
1521+private fun enterShouldSend(
1523+ hasContent: Boolean,
1524+ sendOnEnter: Boolean,
1528+ !enabled || !hasContent -> false
1529+ sendOnEnter -> !shift
1533+/** The composer's trailing button: while a run is active a Stop (with in-flight spinner),
1534+ * preceded by a Queue button when the user has typed a follow-up; otherwise Send. Extracted so
1535+ * [ChatInputBar] stays under the complexity threshold. */
1537+private fun ComposerTrailingButton(
1542+ onSend: () -> Unit,
1543+ onAbort: () -> Unit,
1544+ onQueue: () -> Unit,
1547+ Row(verticalAlignment = Alignment.CenterVertically) {
1548+ // While a run is active the trailing action is Stop, so the only send affordance is
1549+ // the keyboard's IME action — which is a plain newline when "Send on Enter" is off.
1550+ // That leaves a touch-only user with the setting off no way to queue a follow-up
1551+ // (Ctrl+Enter needs a hardware keyboard). Surface an explicit Queue button whenever
1552+ // there's typed TEXT so queuing is always reachable, without changing the user's
1553+ // Enter-inserts-a-newline preference. Gate on typed text — not the send-oriented
1554+ // canSend, which is also true for an attachment-only composer — because queuing "" just
1555+ // calls setQueuedFollowUp(null), silently cancelling any already-queued follow-up and
1556+ // dropping the staged attachment (queued follow-ups don't carry attachments anyway).
1560+ modifier = Modifier.testTag("queue_button"),
1562+ // PlaylistAdd reads as "add to a queue/list" more clearly than a clock
1563+ // icon (which can be read as "snooze" or "later"), and isn't confused with
1564+ // the Send action sitting right beside the Stop button.
1566+ Icons.AutoMirrored.Filled.PlaylistAdd,
1567+ contentDescription = stringResource(R.string.queue_followup),
1571+ // Show a spinner while the abort REST call is in flight so the user sees the stop
1572+ // was sent, and disable to prevent a double-tap.
1575+ enabled = !aborting,
1576+ modifier = Modifier.padding(start = 4.dp).testTag("stop_button"),
1579+ val stopLabel = stringResource(R.string.stop)
1580+ CircularProgressIndicator(
1581+ Modifier.size(18.dp).semantics { contentDescription = stopLabel },
1582+ strokeWidth = 2.dp,
1585+ Icon(Icons.Filled.Stop, contentDescription = stringResource(R.string.stop))
1593+ modifier = Modifier.padding(start = 4.dp).testTag("send_button"),
1595+ Icon(Icons.AutoMirrored.Filled.Send, contentDescription = stringResource(R.string.send))
1600+@OptIn(androidx.compose.foundation.layout.ExperimentalLayoutApi::class)
1602+private fun EmptyConversation(
1603+ onSuggestion: (String) -> Unit,
1604+ modifier: Modifier = Modifier,
1606+ // A few example prompts so a first-time user has a one-tap path to their first
1607+ // message instead of staring at a blank input. Tapping a chip fills the draft
1608+ // (without sending) so the user can edit it before sending.
1609+ val suggestions = remember {
1611+ R.string.empty_chat_suggest_1,
1612+ R.string.empty_chat_suggest_2,
1613+ R.string.empty_chat_suggest_3,
1617+ modifier = modifier.padding(32.dp),
1618+ horizontalAlignment = Alignment.CenterHorizontally,
1621+ Icons.Filled.AutoAwesome,
1622+ contentDescription = null,
1623+ modifier = Modifier.size(48.dp),
1624+ tint = MaterialTheme.colorScheme.onSurfaceVariant,
1626+ Spacer(Modifier.size(16.dp))
1628+ stringResource(R.string.empty_chat_title),
1629+ style = MaterialTheme.typography.titleMedium,
1631+ Spacer(Modifier.size(8.dp))
1633+ stringResource(R.string.empty_chat_hint),
1634+ style = MaterialTheme.typography.bodyMedium,
1635+ color = MaterialTheme.colorScheme.onSurfaceVariant,
1637+ Spacer(Modifier.size(20.dp))
1638+ // Suggestion chips wrap across rows on narrow screens instead of stacking full-width,
1639+ // so a longer localized prompt doesn't push the chips off-screen on a phone.
1641+ modifier = Modifier.fillMaxWidth(),
1642+ horizontalArrangement = Arrangement.spacedBy(8.dp),
1643+ verticalArrangement = Arrangement.spacedBy(8.dp),
1645+ suggestions.forEach { resId ->
1646+ val text = stringResource(resId)
1647+ androidx.compose.material3.AssistChip(
1648+ onClick = { onSuggestion(text) },
1649+ label = { Text(text, style = MaterialTheme.typography.bodyMedium) },
1656+/** A banner shown while a revert checkpoint is active, offering an Undo (unrevert). */
1658+private fun RevertBanner(onUndo: () -> Unit) {
1660+ color = MaterialTheme.colorScheme.tertiaryContainer,
1661+ tonalElevation = 2.dp,
1662+ modifier = Modifier.fillMaxWidth(),
1665+ modifier = Modifier.fillMaxWidth().padding(start = 12.dp, end = 4.dp, top = 4.dp, bottom = 4.dp),
1666+ verticalAlignment = Alignment.CenterVertically,
1667+ horizontalArrangement = Arrangement.SpaceBetween,
1669+ Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.weight(1f)) {
1671+ Icons.Filled.Restore,
1672+ contentDescription = null,
1673+ tint = MaterialTheme.colorScheme.onTertiaryContainer,
1674+ modifier = Modifier.size(18.dp),
1677+ stringResource(R.string.reverted_banner),
1678+ style = MaterialTheme.typography.bodySmall,
1679+ color = MaterialTheme.colorScheme.onTertiaryContainer,
1680+ modifier = Modifier.padding(start = 8.dp),
1683+ TextButton(onClick = onUndo) { Text(stringResource(R.string.undo)) }
1688+/** A banner shown while messages composed offline are queued in the outbox, with a
1689+ * "Send now" nudge and a discard. Shows a spinner while the queue is flushing. */
1691+private fun OutboxBanner(
1694+ onFlush: () -> Unit,
1695+ onDiscard: () -> Unit,
1698+ color = MaterialTheme.colorScheme.secondaryContainer,
1699+ tonalElevation = 2.dp,
1700+ modifier = Modifier.fillMaxWidth(),
1703+ modifier = Modifier.fillMaxWidth().padding(start = 12.dp, end = 4.dp, top = 4.dp, bottom = 4.dp),
1704+ verticalAlignment = Alignment.CenterVertically,
1705+ horizontalArrangement = Arrangement.SpaceBetween,
1707+ Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.weight(1f)) {
1709+ CircularProgressIndicator(
1710+ Modifier.size(16.dp),
1711+ strokeWidth = 2.dp,
1712+ color = MaterialTheme.colorScheme.onSecondaryContainer,
1714+ Spacer(Modifier.size(8.dp))
1718+ stringResource(R.string.outbox_sending)
1720+ val res = if (count == 1) R.string.outbox_pending_one else R.string.outbox_pending_many
1721+ stringResource(res, count)
1723+ style = MaterialTheme.typography.bodySmall,
1724+ color = MaterialTheme.colorScheme.onSecondaryContainer,
1728+ TextButton(onClick = onFlush) { Text(stringResource(R.string.outbox_flush)) }
1729+ TextButton(onClick = onDiscard) {
1730+ Text(stringResource(R.string.outbox_discard_all), color = MaterialTheme.colorScheme.error)
1737+/** Prompt for a one-off shell command to run in the session's worktree. */
1739+private fun ShellCommandDialog(onDismiss: () -> Unit, onRun: (String) -> Unit) {
1740+ var command by rememberSaveable { mutableStateOf("") }
1742+ onDismissRequest = onDismiss,
1743+ title = { Text(stringResource(R.string.run_shell_command)) },
1747+ onValueChange = { command = it },
1748+ modifier = Modifier.fillMaxWidth(),
1749+ placeholder = { Text(stringResource(R.string.shell_command_hint)) },
1750+ label = { Text(stringResource(R.string.shell_command_label)) },
1752+ keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
1753+ keyboardActions = KeyboardActions(onDone = { if (command.isNotBlank()) onRun(command.trim()) }),
1758+ onClick = { if (command.isNotBlank()) onRun(command.trim()) },
1759+ enabled = command.isNotBlank(),
1760+ ) { Text(stringResource(R.string.run)) }
1762+ dismissButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) } },
1767+ * Change signal for the auto-scroll-on-stream watcher. Primitive fields avoid the
1768+ * boxing `Triple<Int, Int, Boolean>` would impose on every snapshot evaluation, and
1769+ * equality is structural so `snapshotFlow` emits only when something relevant changes.
1771+private data class AutoScrollSignal(val size: Int, val lastTextLength: Int, val pinned: Boolean)
1773+/** Length of the streaming content carried by [part], driving auto-scroll as it grows.
1774+ * Covers text, reasoning, and tool output so a pinned view keeps following non-text
1775+ * streaming, not just plain assistant text. O(1). */
1776+private fun streamingContentLength(part: Part?): Int = when (part) {
1777+ is TextPart -> part.text.length
1778+ is ReasoningPart -> part.text.length
1779+ is ToolPart -> when (val st = part.state) {
1780+ is ToolCompleted -> st.output?.length ?: 0
1781+ is ToolError -> st.error?.length ?: 0
1782+ is ToolRunning -> st.title?.length ?: 0
1788+/** Rename dialog for the currently-open session. Mirrors the SessionListScreen rename
1789+ * dialog but lives in the chat screen so the user can rename without backing out to
1790+ * the list. Pre-filled with the current title; the cap matches the list dialog. */
1792+private fun RenameSessionChatDialog(
1793+ initialTitle: String,
1794+ onDismiss: () -> Unit,
1795+ onConfirm: (String) -> Unit,
1797+ // Seed the field once (no key input) so a later external title change — e.g. opencode
1798+ // auto-generating a session title after the first prompt, arriving via SessionUpdated —
1799+ // doesn't re-initialize the box and discard the user's in-progress edit.
1800+ var title by rememberSaveable { mutableStateOf(initialTitle) }
1802+ onDismissRequest = onDismiss,
1803+ title = { Text(stringResource(R.string.rename_session_chat)) },
1807+ onValueChange = { v -> title = v.take(NetworkConfig.maxSessionTitleChars) },
1808+ modifier = Modifier.fillMaxWidth(),
1809+ placeholder = { Text(stringResource(R.string.session_title_hint)) },
1810+ label = { Text(stringResource(R.string.rename_session_chat)) },
1812+ keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
1813+ keyboardActions = KeyboardActions(onDone = { if (title.isNotBlank()) onConfirm(title.trim()) }),
1817+ TextButton(onClick = { if (title.isNotBlank()) onConfirm(title.trim()) }, enabled = title.isNotBlank()) {
1818+ Text(stringResource(R.string.save))
1822+ TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) }
1828+ * A single item in the chat message list — either a [Message] bubble or a day
1829+ * [Separator] inserted before the first message of a new day. The separator shifts
1830+ * the LazyColumn indices vs. the raw messages list, so scroll-target math must use
1831+ * the [List] of these items (not `messages.size`/`lastIndex`).
1833+private sealed interface MessageListItem {
1835+ val contentType: Any
1837+ data class Message(val message: MessageWithParts, override val key: Any) : MessageListItem {
1838+ override val contentType: Any get() = message.info::class
1841+ data class Separator(val label: String, val ordinal: Int) : MessageListItem {
1842+ // Key on the day-occurrence ordinal, not the label: two non-contiguous groups
1843+ // can share a label (e.g. an untimestamped message — empty label — between two
1844+ // same-day messages, or two untimestamped groups), and a label-only key would
1845+ // then collide, which makes LazyColumn throw on duplicate keys. The ordinal is
1846+ // stable for a given message ordering so slots aren't needlessly recreated.
1847+ override val key: Any get() = "sep_${ordinal}_$label"
1848+ // Separators share a contentType so the LazyColumn can recycle their slots.
1849+ override val contentType: Any get() = "separator"
1854+ * Build the interleaved list of [MessageListItem]s for the message list, inserting a
1855+ * [MessageListItem.Separator] before the first message of each new calendar day. Uses
1856+ * the message's `time.created` (falling back to `updated` then `completed`) to bucket.
1857+ * Messages with no timestamp are grouped under an empty-label separator only if they
1858+ * start the list, so a server that omits timestamps doesn't suppress the first divider.
1860+ * [todayLabel]/[yesterdayLabel] are resolved by the caller (a @Composable can't call
1861+ * stringResource from inside this plain function) and used for the "Today"/"Yesterday"
1862+ * labels; older days fall back to a locale-stable medium-date format.
1864+private fun buildMessageListItems(
1865+ messages: List<MessageWithParts>,
1866+ todayLabel: String,
1867+ yesterdayLabel: String,
1868+): List<MessageListItem> {
1869+ if (messages.isEmpty()) return emptyList()
1870+ val today = java.time.LocalDate.now(java.time.ZoneId.systemDefault())
1871+ val dateFmt = mediumDateFormat()
1872+ val result = ArrayList<MessageListItem>(messages.size + 4)
1873+ val seenKeys = HashSet<String>(messages.size * 2)
1874+ var lastDayKey: String? = null
1876+ var emptyIdOrdinal = 0
1878+ for (message in messages) {
1879+ val ts = message.info.time?.created ?: message.info.time?.updated ?: message.info.time?.completed
1880+ val dayKey = ts?.let { dayKey(it) } ?: ""
1881+ // Emit a separator before the very first message (so a leading un-timestamped message
1882+ // still gets the first divider, empty label and all), and thereafter only when crossing
1883+ // into a new NON-empty calendar day. An un-timestamped message mid-list (empty key)
1884+ // neither emits its own separator nor resets the day — otherwise a following same-day
1885+ // message would see a "" -> "<today>" transition and emit a duplicate "Today" header.
1886+ if (first || (dayKey.isNotEmpty() && dayKey != lastDayKey)) {
1887+ result.add(MessageListItem.Separator(dayLabel(dayKey, ts ?: 0L, today, todayLabel, yesterdayLabel, dateFmt), sepOrdinal++))
1889+ if (dayKey.isNotEmpty()) lastDayKey = dayKey
1891+ // Most messages have a unique non-empty id. An unrecognized-role message can carry an
1892+ // empty id — and the reducer intentionally keeps several such messages as distinct
1893+ // holders — so give each a stable synthetic key and defensively de-collide any remaining
1894+ // duplicate; otherwise LazyColumn throws on a duplicate key and the whole screen crashes.
1895+ var key = message.info.id.ifEmpty { "msg-empty-${emptyIdOrdinal++}" }
1896+ if (!seenKeys.add(key)) {
1898+ while (!seenKeys.add("$key#$suffix")) suffix++
1899+ key = "$key#$suffix"
1901+ result.add(MessageListItem.Message(message, key))
1907+ * A stable bucket key for a timestamp's calendar day (epoch-days as a string).
1909+ * [buildMessageListItems] re-runs on every streaming snapshot (the memo is keyed on the
1910+ * whole `messages` list, which must stay so the live message's fresh parts render), so a
1911+ * naive implementation would re-allocate an `Instant`/`ZonedDateTime`/`LocalDate` for
1912+ * every message on every token. Message timestamps are immutable once assigned, so we
1913+ * memoize the parse per epoch-millis: after the first snapshot, each unchanged message is
1914+ * a cheap hash lookup. Bounded LRU (access-order) caps memory; only touched on the main
1915+ * thread during composition, so the coarse lock is uncontended.
1917+private val dayKeyCache = object : LinkedHashMap<Long, String>(128, 0.75f, true) {
1918+ override fun removeEldestEntry(eldest: MutableMap.MutableEntry<Long, String>): Boolean = size > 1024
1921+private fun dayKey(epochMillis: Long): String = synchronized(dayKeyCache) {
1922+ dayKeyCache.getOrPut(epochMillis) {
1923+ java.time.Instant.ofEpochMilli(epochMillis)
1924+ .atZone(java.time.ZoneId.systemDefault()).toLocalDate().toEpochDay().toString()
1928+// The medium-date formatter is an ICU locale lookup; cache one instance instead of
1929+// allocating a fresh one per buildMessageListItems call, rebuilding only if the default
1930+// locale changes at runtime. Main-thread-only, so no synchronization is needed.
1931+private var cachedDateFmt: java.text.DateFormat? = null
1932+private var cachedDateFmtLocale: java.util.Locale? = null
1934+private fun mediumDateFormat(): java.text.DateFormat {
1935+ val locale = java.util.Locale.getDefault()
1936+ val existing = cachedDateFmt
1937+ if (existing != null && cachedDateFmtLocale == locale) return existing
1938+ return java.text.DateFormat.getDateInstance(java.text.DateFormat.MEDIUM).also {
1940+ cachedDateFmtLocale = locale
1945+ * Resolve a day-key back to a human-readable label. "Today" / "Yesterday" for the
1946+ * recent days, otherwise a locale-stable medium-date format. Returns an empty string
1947+ * when [dayKey] is empty (no timestamp) so no separator is rendered for un-timestamped
1950+private fun dayLabel(
1953+ today: java.time.LocalDate,
1954+ todayLabel: String,
1955+ yesterdayLabel: String,
1956+ dateFmt: java.text.DateFormat,
1958+ if (dayKey.isEmpty()) return ""
1959+ val epochDay = dayKey.toLongOrNull() ?: return ""
1960+ val date = java.time.LocalDate.ofEpochDay(epochDay)
1962+ date == today -> todayLabel
1963+ date == today.minusDays(1) -> yesterdayLabel
1964+ else -> dateFmt.format(java.util.Date(ts))
1969+ * A centered day divider in the message list. Renders nothing for an empty label
1970+ * (the no-timestamp case) so un-timestamped messages don't get a stray blank divider.
1973+private fun DateSeparator(label: String) {
1974+ if (label.isBlank()) return
1976+ modifier = Modifier.fillMaxWidth(),
1977+ horizontalArrangement = Arrangement.Center,
1980+ color = MaterialTheme.colorScheme.surfaceVariant,
1981+ shape = MaterialTheme.shapes.small,
1985+ style = MaterialTheme.typography.labelSmall,
1986+ color = MaterialTheme.colorScheme.onSurfaceVariant,
1987+ modifier = Modifier.padding(horizontal = 12.dp, vertical = 4.dp),