Files
fusion/packages/dashboard/app/components/ChatView.tsx
Fusion 5141cf8b15 feat(FN-4610): complete Step 1 — add latest button to rooms thread
Fusion-Task-Id: FN-4610
Fusion-Task-Lineage: 6f2a411d-817d-45e5-bc8f-40ea38920401
2026-05-15 08:59:10 -07:00

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TypeScript
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// ChatView.css is imported eagerly from App.tsx to avoid a flash of
// unstyled content when the lazy chunk loads. Do not re-import here.
import React, { memo, useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState, type CSSProperties, type ReactNode } from "react";
import ReactMarkdown from "react-markdown";
import remarkGfm from "remark-gfm";
import type { Components } from "react-markdown";
import {
MessageSquare,
Send,
Plus,
Search,
Trash2,
Archive,
ChevronLeft,
Bot,
Square,
Eye,
EyeOff,
Paperclip,
File,
Wrench,
ChevronDown,
Copy,
Check,
TriangleAlert,
} from "lucide-react";
import { useChat, type ChatMessageInfo, type FailureInfo, type ToolCallInfo } from "../hooks/useChat";
import { useChatRooms } from "../hooks/useChatRooms";
import { useViewportMode } from "./Header";
import { fetchAgents, fetchDiscoveredSkills, fetchModels, updateGlobalSettings } from "../api";
import type { Agent } from "@fusion/core";
import type { DiscoveredSkill } from "@fusion/dashboard";
import type { ModelInfo } from "../api";
import { CustomModelDropdown } from "./CustomModelDropdown";
import { ProviderIcon } from "./ProviderIcon";
import { AgentMentionPopup } from "./AgentMentionPopup";
import { AgentAvatar } from "./AgentAvatar";
import { FileMentionPopup } from "./FileMentionPopup";
import { CreateRoomModal } from "./CreateRoomModal";
import { useFileMention } from "../hooks/useFileMention";
import { useMobileKeyboard } from "../hooks/useMobileKeyboard";
import { useMobileScrollLock } from "../hooks/useMobileScrollLock";
import { matchesAgentMentionFilter } from "./mentionMatching";
import { useNavigationHistoryContext } from "../hooks/useNavigationHistory";
import { linkifyFilePaths, linkifyReactChildren } from "../utils/filePathLinkify";
export interface ChatViewProps {
projectId?: string;
addToast: (msg: string, type?: "success" | "error" | "warning") => void;
experimentalFeatures?: Record<string, boolean>;
}
const CHAT_INPUT_MAX_HEIGHT_PX = 320;
export function clampChatInputHeight(scrollHeight: number): number {
return Math.min(scrollHeight, CHAT_INPUT_MAX_HEIGHT_PX);
}
function formatRelativeTime(dateStr: string): string {
const date = new Date(dateStr);
const now = new Date();
const diffMs = now.getTime() - date.getTime();
const diffSecs = Math.floor(diffMs / 1000);
const diffMins = Math.floor(diffSecs / 60);
const diffHours = Math.floor(diffMins / 60);
const diffDays = Math.floor(diffHours / 24);
if (diffSecs < 60) return "just now";
if (diffMins < 60) return `${diffMins}m ago`;
if (diffHours < 24) return `${diffHours}h ago`;
if (diffDays < 7) return `${diffDays}d ago`;
return date.toLocaleDateString();
}
/**
* Format a model provider and ID into a human-readable tag.
* Returns null if provider or modelId is missing/empty.
*/
function formatModelTag(provider?: string | null, modelId?: string | null): string | null {
if (!provider || !modelId) return null;
// Handle known provider/model patterns
const normalizedModel = modelId.toLowerCase();
// Claude models: "claude-sonnet-4-5" -> "Claude Sonnet 4.5"
if (normalizedModel.includes("claude")) {
let formatted = modelId
.replace(/^claude[- ]/i, "Claude ")
.replace(/sonnet[- ](\d+)[- ](\d+)/i, "Sonnet $1.$2")
.replace(/sonnet[- ](\d+)/i, "Sonnet $1")
.replace(/haiku[- ](\d+)/i, "Haiku $1")
.replace(/opus[- ](\d+)/i, "Opus $1")
.replace(/sonnet/i, "Sonnet")
.replace(/haiku/i, "Haiku")
.replace(/opus/i, "Opus")
.replace(/-/g, " ")
.trim();
// Fix double spaces
formatted = formatted.replace(/\s+/g, " ");
return formatted.length > 30 ? formatted.slice(0, 30) + "…" : formatted;
}
// OpenAI models: "gpt-4o" -> "GPT-4o", "gpt-4-turbo" -> "GPT-4 Turbo"
if (normalizedModel.includes("gpt") || normalizedModel.includes("openai")) {
// Format GPT model names: handle special cases first, then capitalize
// Note: We don't replace hyphens globally because special cases preserve them
const formatted = modelId
.replace(/^gpt-4-turbo$/i, "GPT-4 Turbo")
.replace(/^gpt-4o-mini$/i, "GPT-4o Mini")
.replace(/^gpt-4o$/i, "GPT-4o")
.replace(/^gpt-4$/i, "GPT-4")
.replace(/^gpt-o1-preview$/i, "GPT-o1 Preview")
.replace(/^gpt-o1-mini$/i, "GPT-o1 Mini")
.replace(/^gpt-o1$/i, "GPT-o1")
.replace(/^gpt/i, "GPT") // Capitalize remaining GPT prefix
.trim();
return formatted.length > 30 ? formatted.slice(0, 30) + "…" : formatted;
}
// Gemini models: "gemini-2.5-pro" -> "Gemini 2.5 Pro"
if (normalizedModel.includes("gemini")) {
const formatted = modelId
.replace(/^gemini[- ]/i, "Gemini ")
.replace(/pro[- ](\d+)[- ](\d+)/i, "Pro $1.$2")
.replace(/pro[- ](\d+)/i, "Pro $1")
.replace(/-/g, " ")
.replace(/\s+/g, " ")
.trim();
return formatted.length > 30 ? formatted.slice(0, 30) + "…" : formatted;
}
// Generic fallback: capitalize first letter, replace hyphens with spaces
const formatted = modelId
.replace(/-/g, " ")
.replace(/^\w/, (c) => c.toUpperCase())
.replace(/\s+/g, " ")
.trim();
return formatted.length > 30 ? formatted.slice(0, 30) + "…" : formatted;
}
function truncateToolValue(value: string, maxLength: number): string {
if (value.length <= maxLength) return value;
return `${value.slice(0, maxLength)}`;
}
function formatToolArgsSummary(args?: Record<string, unknown>): string | null {
if (!args) return null;
const entries = Object.entries(args);
if (entries.length === 0) return null;
return entries
.map(([key, value]) => {
const stringValue =
typeof value === "string"
? value
: (() => {
try {
return JSON.stringify(value);
} catch {
return String(value);
}
})();
return `${key}=${truncateToolValue(stringValue, 50)}`;
})
.join(", ");
}
function formatToolResultSummary(result: unknown): string | null {
if (result === undefined) return null;
if (typeof result === "string") return truncateToolValue(result, 200);
try {
return truncateToolValue(JSON.stringify(result), 200);
} catch {
return truncateToolValue(String(result), 200);
}
}
function buildFailureReferenceHref(reference: FailureInfo["reference"]): string | null {
if (!reference) {
return null;
}
if (reference.kind === "mailbox" || reference.kind === "mailbox-message") {
const pathname = typeof window === "undefined" ? "/" : window.location.pathname || "/";
const params = new URLSearchParams(typeof window === "undefined" ? "" : window.location.search);
params.set("view", "mailbox");
params.set("mailbox-message", reference.id);
return `${pathname}?${params.toString()}#message-${encodeURIComponent(reference.id)}`;
}
return null;
}
function renderFailureReference(reference: FailureInfo["reference"]): ReactNode {
if (!reference) {
return null;
}
const referenceLabel = reference.label ?? `${reference.kind} ${reference.id}`;
const referenceHref = buildFailureReferenceHref(reference);
const referenceDetailsId = `chat-failure-reference-${reference.kind}-${reference.id}`
.replace(/[^a-zA-Z0-9_-]+/g, "-")
.toLowerCase();
return (
<div className="chat-message-failure-reference">
<span className="chat-message-failure-reference-label">Reference</span>
<span className="chat-message-failure-reference-value">{referenceLabel}</span>
{referenceHref ? (
<a className="btn btn-sm chat-message-failure-reference-link" href={referenceHref}>
Open mailbox message
</a>
) : (
<details className="chat-message-failure-reference-details">
<summary className="btn btn-sm chat-message-failure-reference-link">View failure details</summary>
<dl className="chat-message-failure-reference-meta" id={referenceDetailsId}>
<div>
<dt>Kind</dt>
<dd>{reference.kind}</dd>
</div>
<div>
<dt>ID</dt>
<dd>{reference.id}</dd>
</div>
{reference.label && (
<div>
<dt>Label</dt>
<dd>{reference.label}</dd>
</div>
)}
</dl>
</details>
)}
</div>
);
}
function renderToolCalls(toolCalls?: ToolCallInfo[]): ReactNode {
if (!toolCalls || toolCalls.length === 0) return null;
const renderToolCallItem = (toolCall: ToolCallInfo, index: number) => {
const isRunning = toolCall.status === "running";
const isError = toolCall.status === "completed" && toolCall.isError;
const argsSummary = formatToolArgsSummary(toolCall.args);
const resultSummary = formatToolResultSummary(toolCall.result);
const summaryPreview = isRunning
? argsSummary
: resultSummary
? `result: ${resultSummary}`
: argsSummary
? `args: ${argsSummary}`
: null;
const statusLabel = isRunning ? "running" : isError ? "error" : "completed";
return (
<details
key={`${toolCall.toolName}-${index}`}
className={`chat-tool-call${isRunning ? " chat-tool-call--running" : ""}${isError ? " chat-tool-call--error" : ""}`}
open={isRunning}
>
<summary>
<span className="chat-tool-call-status-dot" aria-hidden="true" />
<span className="chat-tool-call-name" title={toolCall.toolName}>{toolCall.toolName}</span>
{summaryPreview && (
<span className="chat-tool-call-preview" title={summaryPreview}>
{summaryPreview}
</span>
)}
<span className="chat-tool-call-status-text">{statusLabel}</span>
</summary>
<div className="chat-tool-call-content">
{argsSummary && (
<div className="chat-tool-call-row">
<span className="chat-tool-call-label">args</span>
<span className="chat-tool-call-value">{argsSummary}</span>
</div>
)}
{resultSummary && (
<div className={`chat-tool-call-row${isError ? " chat-tool-call-row--error" : ""}`}>
<span className="chat-tool-call-label">result</span>
<span className="chat-tool-call-value">{resultSummary}</span>
</div>
)}
</div>
</details>
);
};
const className = "chat-tool-calls";
if (toolCalls.length === 1) {
return (
<div className={className} data-testid="chat-tool-calls">
<div className="chat-tool-calls-header">
<Wrench size={12} aria-hidden="true" />
<span>Tool calls</span>
</div>
{renderToolCallItem(toolCalls[0], 0)}
</div>
);
}
const runningCount = toolCalls.filter((toolCall) => toolCall.status === "running").length;
const errorCount = toolCalls.filter((toolCall) => toolCall.status === "completed" && toolCall.isError).length;
const hasRunning = runningCount > 0;
const uniqueNames = Array.from(new Set(toolCalls.map((toolCall) => toolCall.toolName)));
const visibleNames = uniqueNames.slice(0, 5);
const overflowCount = Math.max(0, uniqueNames.length - visibleNames.length);
const namesSummary = overflowCount > 0
? `${visibleNames.join(", ")}, +${overflowCount} more`
: visibleNames.join(", ");
const statusSummary = hasRunning
? `(${runningCount} running)`
: errorCount > 0
? `(${errorCount} ${errorCount === 1 ? "error" : "errors"})`
: null;
return (
<div className={className} data-testid="chat-tool-calls">
<details className="chat-tool-calls-group" data-testid="chat-tool-calls-group" open={hasRunning}>
<summary className="chat-tool-calls-group-summary">
<Wrench size={12} aria-hidden="true" />
<span className="chat-tool-calls-count">{toolCalls.length} tool calls</span>
<span className="chat-tool-calls-names" title={namesSummary}>{namesSummary}</span>
{statusSummary && <span className="chat-tool-calls-group-status">{statusSummary}</span>}
</summary>
{toolCalls.map((toolCall, index) => renderToolCallItem(toolCall, index))}
</details>
</div>
);
}
const chatMarkdownComponents: Components = {
p: ({ children, ...props }) => (
<p {...props}>{linkifyReactChildren(children)}</p>
),
li: ({ children, ...props }) => (
<li {...props}>{linkifyReactChildren(children)}</li>
),
pre: ({ children, ...props }) => (
<pre {...props} className="chat-markdown-pre">
{children}
</pre>
),
code: ({ children, ...props }) => {
const text = typeof children === "string" ? children : React.Children.toArray(children).join("");
const linkedChildren = linkifyFilePaths(text);
if (linkedChildren.length === 1 && typeof linkedChildren[0] === "string") {
return <code {...props}>{children}</code>;
}
return <code {...props}>{linkedChildren}</code>;
},
table: ({ children, ...props }) => (
<table {...props} className="chat-markdown-table">
{children}
</table>
),
};
/**
* Constant agent ID for the built-in fn agent.
* The chat system always uses createFnAgent with CHAT_SYSTEM_PROMPT regardless
* of the agentId stored on the session. This ID serves as metadata only.
*/
const FN_AGENT_ID = "__fn_agent__";
const CHAT_SIDEBAR_DEFAULT_WIDTH = 280;
const CHAT_SIDEBAR_MIN_WIDTH = 180;
const CHAT_SIDEBAR_MAX_WIDTH = 500;
const CHAT_SIDEBAR_STORAGE_KEY = "fusion:chat-sidebar-width";
const CHAT_SCOPE_STORAGE_KEY = "fusion:chat-scope";
const CHAT_DRAFT_STORAGE_PREFIX = "fusion:chat-draft:";
function getChatDraftKey(scope: "direct" | "rooms", id: string | null | undefined): string | null {
if (!id) {
return null;
}
return `${CHAT_DRAFT_STORAGE_PREFIX}${scope}:${id}`;
}
function getPersistedChatDraft(key: string | null): string {
if (!key) {
return "";
}
try {
return localStorage.getItem(key) ?? "";
} catch {
return "";
}
}
interface PendingAttachment {
file: File;
previewUrl: string;
}
const ALLOWED_ATTACHMENT_TYPES = [
"image/png",
"image/jpeg",
"image/gif",
"image/webp",
"text/plain",
"application/json",
"text/yaml",
"text/markdown",
"text/csv",
"application/xml",
"text/x-log",
];
function getSkillTriggerMatch(value: string): { filter: string; start: number; end: number } | null {
const triggerMatch = /(^|[\s])\/([^\s]*)$/.exec(value);
if (!triggerMatch) {
return null;
}
const prefix = triggerMatch[1] ?? "";
const filter = triggerMatch[2] ?? "";
const start = triggerMatch.index + prefix.length;
return {
filter,
start,
end: value.length,
};
}
function getMentionTriggerMatch(
value: string,
cursorPos: number,
): { filter: string; start: number; end: number } | null {
const textBeforeCursor = value.slice(0, cursorPos);
const triggerMatch = /(^|[\s\n])@([\w-]*)$/.exec(textBeforeCursor);
if (!triggerMatch) {
return null;
}
const filter = triggerMatch[2] ?? "";
const start = textBeforeCursor.length - filter.length - 1;
return {
filter,
start,
end: cursorPos,
};
}
interface NewChatDialogProps {
projectId?: string;
onClose: () => void;
onCreate: (input: { agentId: string; modelProvider?: string; modelId?: string }) => void;
}
function NewChatDialog({ projectId, onClose, onCreate }: NewChatDialogProps) {
const [chatMode, setChatMode] = useState<"agent" | "model">("agent");
const [agents, setAgents] = useState<Agent[]>([]);
const [agentsLoading, setAgentsLoading] = useState(true);
const [selectedAgentId, setSelectedAgentId] = useState<string>("");
const [models, setModels] = useState<ModelInfo[]>([]);
const [modelsLoading, setModelsLoading] = useState(true);
const [selectedModel, setSelectedModel] = useState<string>("");
const [favoriteProviders, setFavoriteProviders] = useState<string[]>([]);
const [favoriteModels, setFavoriteModels] = useState<string[]>([]);
// Load agents on mount (project-scoped)
useEffect(() => {
let cancelled = false;
setAgentsLoading(true);
fetchAgents(undefined, projectId)
.then((response) => {
if (!cancelled) {
setAgents(response);
}
})
.catch(() => {
if (!cancelled) {
// Silently fail - show empty list
setAgents([]);
}
})
.finally(() => {
if (!cancelled) {
setAgentsLoading(false);
}
});
return () => {
cancelled = true;
};
}, [projectId]);
// Load models on mount
useEffect(() => {
setModelsLoading(true);
fetchModels()
.then((response) => {
setModels(response.models);
setFavoriteProviders(response.favoriteProviders);
setFavoriteModels(response.favoriteModels);
})
.catch(() => {
// Silently fail - show empty list
setModels([]);
setFavoriteProviders([]);
setFavoriteModels([]);
})
.finally(() => {
setModelsLoading(false);
});
}, []);
const handleToggleFavorite = useCallback(async (provider: string) => {
const currentFavorites = favoriteProviders;
const isFavorite = currentFavorites.includes(provider);
const newFavorites = isFavorite
? currentFavorites.filter((value) => value !== provider)
: [provider, ...currentFavorites];
setFavoriteProviders(newFavorites);
try {
await updateGlobalSettings({ favoriteProviders: newFavorites, favoriteModels });
} catch {
setFavoriteProviders(currentFavorites);
}
}, [favoriteProviders, favoriteModels]);
const handleToggleModelFavorite = useCallback(async (modelId: string) => {
const currentFavorites = favoriteModels;
const isFavorite = currentFavorites.includes(modelId);
const newFavorites = isFavorite
? currentFavorites.filter((value) => value !== modelId)
: [modelId, ...currentFavorites];
setFavoriteModels(newFavorites);
try {
await updateGlobalSettings({ favoriteProviders, favoriteModels: newFavorites });
} catch {
setFavoriteModels(currentFavorites);
}
}, [favoriteModels, favoriteProviders]);
const handleSubmit = (e: React.SyntheticEvent<HTMLFormElement>) => {
e.preventDefault();
if (chatMode === "agent") {
if (!selectedAgentId) return;
onCreate({ agentId: selectedAgentId });
return;
}
// model mode
if (!selectedModel) return;
const slashIdx = selectedModel.indexOf("/");
if (slashIdx <= 0) return;
const modelProvider = selectedModel.slice(0, slashIdx);
const modelId = selectedModel.slice(slashIdx + 1);
onCreate({ agentId: FN_AGENT_ID, modelProvider, modelId });
};
const isSubmitDisabled =
chatMode === "agent" ? !selectedAgentId : !selectedModel;
return (
<div className="chat-new-dialog-backdrop chat-view-dialog-backdrop" onClick={onClose} role="dialog" aria-modal="true">
<div className="chat-new-dialog chat-view-dialog" onClick={(e) => e.stopPropagation()}>
<h3>New Chat</h3>
<div className="chat-new-dialog-mode-toggle" data-testid="chat-new-dialog-mode-toggle">
<button
type="button"
className={`chat-new-dialog-mode-btn${chatMode === "agent" ? " chat-new-dialog-mode-btn--active" : ""}`}
data-testid="chat-new-dialog-mode-agent"
onClick={() => {
setChatMode("agent");
setSelectedModel("");
}}
>
Agent
</button>
<button
type="button"
className={`chat-new-dialog-mode-btn${chatMode === "model" ? " chat-new-dialog-mode-btn--active" : ""}`}
data-testid="chat-new-dialog-mode-model"
onClick={() => {
setChatMode("model");
setSelectedAgentId("");
}}
>
Model
</button>
</div>
<form onSubmit={handleSubmit}>
{chatMode === "agent" && (
<label className="chat-new-dialog-model-label">
Agent
{agentsLoading ? (
<div className="chat-new-dialog-loading">Loading agents...</div>
) : agents.length === 0 ? (
<div className="chat-new-dialog-empty">No agents available</div>
) : (
<div className="chat-new-dialog-agent-list">
{agents.map((agent) => (
<button
key={agent.id}
type="button"
className={`chat-new-dialog-agent-item${selectedAgentId === agent.id ? " chat-new-dialog-agent-item--selected" : ""}`}
onClick={() => setSelectedAgentId(agent.id)}
data-testid={`agent-option-${agent.id}`}
>
<Bot size={16} />
<span className="chat-new-dialog-agent-name">{agent.name}</span>
<span className="chat-new-dialog-agent-role">{agent.role}</span>
</button>
))}
</div>
)}
</label>
)}
{chatMode === "model" && (
<div className="chat-new-dialog-model-dropdown" data-testid="chat-new-dialog-model-section">
{modelsLoading ? (
<div className="chat-new-dialog-loading">Loading models...</div>
) : (
<CustomModelDropdown
models={models}
value={selectedModel}
onChange={setSelectedModel}
label="Model"
placeholder="Select a model"
favoriteProviders={favoriteProviders}
onToggleFavorite={handleToggleFavorite}
favoriteModels={favoriteModels}
onToggleModelFavorite={handleToggleModelFavorite}
/>
)}
</div>
)}
<div className="chat-new-dialog-actions">
<button type="button" className="btn btn-sm" onClick={onClose}>
Cancel
</button>
<button
type="submit"
className="btn btn-sm btn-primary"
disabled={isSubmitDisabled}
>
Create
</button>
</div>
</form>
</div>
</div>
);
}
type CopyFeedbackState = "success" | "error" | null;
interface RoomContext {
roomId: string;
roomName: string;
memberIds: ReadonlySet<string>;
}
interface ChatMessageItemProps {
message: ChatMessageInfo;
/**
* When true, render assistant message content as plain text instead of
* Markdown. The per-message eye toggle has been removed in favor of a
* single thread-level toggle in the chat header, so this is a global
* mirror of that header state.
*/
forcePlain: boolean;
agentName: string;
/**
* Hide the per-message agent identity (icon + name + model tag) on
* assistant bubbles. In model-only chats the agent identity *is* the
* active model and it's already shown in the thread header.
*/
hideAssistantIdentity: boolean;
showAssistantModelTag: boolean;
activeModelTag: string | null;
activeModelProvider: string | null;
activeSessionId: string | null;
mentionAgentsByName: Map<string, Agent>;
roomContext: RoomContext | null;
copyAction?: ReactNode;
}
// Renders a single chat message bubble. Memoized so the streaming bubble's
// per-frame state churn does not re-render every prior message (each one
// would re-run ReactMarkdown over its full content otherwise).
const ChatMessageItem = memo(function ChatMessageItem({
message,
forcePlain,
agentName,
hideAssistantIdentity,
showAssistantModelTag,
activeModelTag,
activeModelProvider,
activeSessionId,
mentionAgentsByName,
roomContext,
copyAction,
}: ChatMessageItemProps) {
const isAssistantMessage = message.role === "assistant";
const failureInfo = isAssistantMessage ? message.failureInfo : undefined;
const showAssistantIdentity = isAssistantMessage && (!hideAssistantIdentity || Boolean(failureInfo));
const renderedUserContent = useMemo<ReactNode>(() => {
if (isAssistantMessage) return null;
const content = message.content;
const mentionRegex = /@([\w-]+)/g;
const parts: ReactNode[] = [];
let lastIndex = 0;
let match = mentionRegex.exec(content);
while (match) {
const [fullMatch, rawName = ""] = match;
const start = match.index;
if (start > lastIndex) parts.push(content.slice(lastIndex, start));
const normalizedName = rawName.replace(/_/g, " ").toLowerCase();
const mentionedAgent = mentionAgentsByName.get(normalizedName);
if (mentionedAgent) {
const isNonMember = Boolean(roomContext && !roomContext.memberIds.has(mentionedAgent.id));
const nonMemberLabel = isNonMember ? `Not a member of ${roomContext?.roomName}` : undefined;
parts.push(
<span
key={`${mentionedAgent.id}-${start}`}
className={`chat-mention-chip${isNonMember ? " chat-mention-chip--non-member" : ""}`}
title={nonMemberLabel}
aria-label={nonMemberLabel}
>
@{mentionedAgent.name.replace(/\s+/g, "_")}
</span>,
);
} else {
parts.push(fullMatch);
}
lastIndex = start + fullMatch.length;
match = mentionRegex.exec(content);
}
if (lastIndex < content.length) parts.push(content.slice(lastIndex));
return parts.length === 0 ? content : parts;
}, [isAssistantMessage, message.content, mentionAgentsByName, roomContext]);
const renderedAttachments = useMemo<ReactNode>(() => {
const attachments = message.attachments;
if (!attachments || attachments.length === 0 || !activeSessionId) return null;
const attachmentUrlBase = `/api/chat/sessions/${encodeURIComponent(activeSessionId)}/attachments/`;
return (
<div className="chat-message-attachments">
{attachments.map((attachment) => {
const isImage = attachment.mimeType.startsWith("image/");
const key = attachment.id || attachment.filename;
const href = `${attachmentUrlBase}${encodeURIComponent(attachment.filename)}`;
if (isImage) {
return (
<a
key={key}
className="chat-message-attachment-link"
data-testid="chat-message-attachment"
href={href}
target="_blank"
rel="noopener noreferrer"
>
<img
className="chat-message-attachment"
src={href}
alt={attachment.originalName}
/>
</a>
);
}
return (
<a
key={key}
className="chat-message-attachment-file"
data-testid="chat-message-attachment"
href={href}
target="_blank"
rel="noopener noreferrer"
>
<File size={14} />
<span>{attachment.originalName}</span>
</a>
);
})}
</div>
);
}, [message.attachments, activeSessionId]);
const assistantBody = useMemo<ReactNode>(() => {
if (!isAssistantMessage) return null;
if (failureInfo) {
return (
<div className="chat-message-content chat-message-content--failure">
<div className="chat-message-failure-summary-row">
<span className="status-dot status-dot--error" aria-hidden="true" />
<span className="chat-message-failure-label">Response failed</span>
</div>
<div className="chat-message-failure-summary">{failureInfo.summary}</div>
{(failureInfo.errorClass || failureInfo.code) && (
<div className="chat-message-failure-badges">
{failureInfo.errorClass && <span className="chat-message-failure-badge">{failureInfo.errorClass}</span>}
{failureInfo.code && <span className="chat-message-failure-badge">{failureInfo.code}</span>}
</div>
)}
{(failureInfo.detail || failureInfo.reference) && (
<details className="chat-message-failure-details">
<summary>
<TriangleAlert size={14} aria-hidden="true" />
<span>Failure details</span>
</summary>
{failureInfo.detail && <pre className="chat-message-failure-detail">{linkifyFilePaths(failureInfo.detail)}</pre>}
{renderFailureReference(failureInfo.reference)}
</details>
)}
</div>
);
}
if (forcePlain) {
return <div className="chat-message-content chat-message-content--plain">{message.content}</div>;
}
return (
<div className="chat-message-content chat-message-content--markdown">
<ReactMarkdown remarkPlugins={[remarkGfm]} components={chatMarkdownComponents}>
{message.content}
</ReactMarkdown>
</div>
);
}, [failureInfo, forcePlain, isAssistantMessage, message.content]);
return (
<div
className={`chat-message chat-message--${message.role}${failureInfo ? " chat-message--failure" : ""}`}
data-testid={`chat-message-${message.id}`}
>
{showAssistantIdentity && (
<div className="chat-message-avatar">
{activeModelProvider ? <ProviderIcon provider={activeModelProvider} size="sm" /> : <Bot size={14} />}
<span>{agentName}</span>
{showAssistantModelTag && activeModelTag && <span className="chat-model-tag">{activeModelTag}</span>}
</div>
)}
{isAssistantMessage
? assistantBody
: <div className="chat-message-content">{renderedUserContent}</div>}
{!failureInfo && copyAction}
{renderToolCalls(message.toolCalls)}
{message.thinkingOutput && (
<details className="chat-message-thinking">
<summary>Thinking</summary>
<pre className="chat-message-thinking-content">{linkifyFilePaths(message.thinkingOutput)}</pre>
</details>
)}
{renderedAttachments}
<div className="chat-message-time">{formatRelativeTime(message.createdAt)}</div>
</div>
);
});
export function ChatView({ projectId, addToast, experimentalFeatures }: ChatViewProps) {
const {
activeSession,
sessionsLoading,
messages,
messagesLoading,
isStreaming,
streamingText,
streamingThinking,
streamingToolCalls,
selectSession,
createSession,
archiveSession,
deleteSession,
sendMessage,
stopStreaming,
pendingMessage,
clearPendingMessage,
searchQuery,
setSearchQuery,
filteredSessions,
} = useChat(projectId, addToast);
const [showNewDialog, setShowNewDialog] = useState(false);
const chatRoomsEnabled = experimentalFeatures?.chatRooms === true;
const [chatScope, setChatScope] = useState<"direct" | "rooms">(() => {
try {
const persistedScope = localStorage.getItem(CHAT_SCOPE_STORAGE_KEY);
if (persistedScope === "rooms" && chatRoomsEnabled) {
return "rooms";
}
} catch {
// Ignore storage errors.
}
return "direct";
});
// Keep this hook unconditional to preserve hook ordering and test stability.
// Rooms UI and interactions are fully gated by `chatRoomsEnabled`.
const rooms = useChatRooms(projectId, addToast);
const [messageInput, setMessageInput] = useState(() => {
const initialDraftKey = getChatDraftKey(
chatScope,
chatScope === "rooms" ? rooms.activeRoom?.id : activeSession?.id,
);
return getPersistedChatDraft(initialDraftKey);
});
const [contextMenu, setContextMenu] = useState<{ sessionId: string; x: number; y: number } | null>(null);
const [confirmDelete, setConfirmDelete] = useState<string | null>(null);
const [confirmDeleteRoomId, setConfirmDeleteRoomId] = useState<string | null>(null);
const [sidebarVisible, setSidebarVisible] = useState(true);
const [sidebarWidth, setSidebarWidth] = useState(CHAT_SIDEBAR_DEFAULT_WIDTH);
const [createRoomOpen, setCreateRoomOpen] = useState(false);
const [agentsMap, setAgentsMap] = useState<Map<string, Agent>>(new Map());
const [discoveredSkills, setDiscoveredSkills] = useState<DiscoveredSkill[]>([]);
const [skillsLoading, setSkillsLoading] = useState(true);
const [showSkillMenu, setShowSkillMenu] = useState(false);
const [skillFilter, setSkillFilter] = useState("");
const [highlightedSkillIndex, setHighlightedSkillIndex] = useState(0);
const [mentionFilter, setMentionFilter] = useState("");
const [mentionPopupVisible, setMentionPopupVisible] = useState(false);
const [mentionHighlightIndex, setMentionHighlightIndex] = useState(0);
const [mentionStartPos, setMentionStartPos] = useState(-1);
// Single thread-wide toggle: when true, all assistant content (including the
// streaming bubble) renders as plain text instead of Markdown. Replaces the
// earlier per-message toggle so the chat header owns this control instead
// of every reply having its own button.
const [showAllAsPlain, setShowAllAsPlain] = useState(false);
// Attachment state mirrors QuickEntryBox: pending files selected before send.
const [pendingAttachments, setPendingAttachments] = useState<PendingAttachment[]>([]);
const [isDragOver, setIsDragOver] = useState(false);
const [isUserScrolling, setIsUserScrolling] = useState(false);
const [copyFeedbackByMessageId, setCopyFeedbackByMessageId] = useState<Record<string, CopyFeedbackState>>({});
const [mobileSessionMenuOpen, setMobileSessionMenuOpen] = useState(false);
const { pushNav } = useNavigationHistoryContext();
// File mention state and hook
const [, setFileMentionPopupVisible] = useState(false);
const [fileMentionPosition, setFileMentionPosition] = useState({ top: 0, left: 0 });
const fileMention = useFileMention({ projectId });
// Calculate popup position based on caret position in textarea
const updateFileMentionPosition = useCallback((textarea: HTMLTextAreaElement | null) => {
if (!textarea || !fileMention.mentionActive) return;
// Get textarea position
const rect = textarea.getBoundingClientRect();
// Position above the textarea, using viewport coordinates
// The popup is absolutely positioned, so we use window coordinates
setFileMentionPosition({
top: rect.top - 260, // Popup appears above with gap (accounting for popup height)
left: rect.left + 8, // Small left offset
});
}, [fileMention.mentionActive]);
const messagesEndRef = useRef<HTMLDivElement>(null);
const mobileSessionMenuRef = useRef<HTMLDivElement>(null);
const isUserScrollingRef = useRef(false);
const lastAnchoredThreadStateRef = useRef<{ threadId: string; loaded: boolean; hasMessages: boolean } | null>(null);
const previousChatScopeRef = useRef<"direct" | "rooms" | null>(null);
const visibilityReanchorTimeoutRef = useRef<number | null>(null);
const directThreadDeferredAnchorTimeoutRef = useRef<number | null>(null);
const hideSkillMenuTimeoutRef = useRef<number | null>(null);
const messagesContainerRef = useRef<HTMLDivElement>(null);
const inputRef = useRef<HTMLTextAreaElement>(null);
const fileInputRef = useRef<HTMLInputElement>(null);
const pendingAttachmentsRef = useRef<PendingAttachment[]>([]);
const mentionCursorPosRef = useRef(0);
const copyFeedbackTimeoutsRef = useRef<Map<string, number>>(new Map());
const mode = useViewportMode();
const isMobile = mode === "mobile";
useEffect(() => {
try {
const rawWidth = localStorage.getItem(CHAT_SIDEBAR_STORAGE_KEY);
if (!rawWidth) return;
const parsedWidth = Number.parseInt(rawWidth, 10);
if (Number.isNaN(parsedWidth)) return;
const clampedWidth = Math.max(CHAT_SIDEBAR_MIN_WIDTH, Math.min(CHAT_SIDEBAR_MAX_WIDTH, parsedWidth));
setSidebarWidth(clampedWidth);
} catch {
// Ignore storage errors.
}
}, []);
useEffect(() => {
try {
const persistedScope = localStorage.getItem(CHAT_SCOPE_STORAGE_KEY);
if (persistedScope === "direct") {
setChatScope("direct");
return;
}
if (persistedScope === "rooms" && chatRoomsEnabled) {
setChatScope("rooms");
}
} catch {
// Ignore storage errors.
}
}, [chatRoomsEnabled]);
useEffect(() => {
if (!chatRoomsEnabled && chatScope === "rooms") {
setChatScope("direct");
return;
}
try {
localStorage.setItem(CHAT_SCOPE_STORAGE_KEY, chatScope);
} catch {
// Ignore storage errors.
}
}, [chatRoomsEnabled, chatScope]);
const activeDraftKey = getChatDraftKey(
chatScope,
chatScope === "rooms" ? rooms.activeRoom?.id : activeSession?.id,
);
const lastDraftKeyRef = useRef<string | null>(activeDraftKey);
useEffect(() => {
if (activeDraftKey === lastDraftKeyRef.current) {
return;
}
lastDraftKeyRef.current = activeDraftKey;
setMessageInput(getPersistedChatDraft(activeDraftKey));
}, [activeDraftKey]);
useEffect(() => {
if (!activeDraftKey || lastDraftKeyRef.current !== activeDraftKey) {
return;
}
try {
if (messageInput) {
localStorage.setItem(activeDraftKey, messageInput);
return;
}
localStorage.removeItem(activeDraftKey);
} catch {
// Ignore storage errors.
}
}, [activeDraftKey, messageInput]);
const roomThreadActive = chatRoomsEnabled && chatScope === "rooms" && !!rooms.activeRoom;
const { keyboardOverlap, viewportHeight, viewportOffsetTop, keyboardOpen } = useMobileKeyboard({
enabled: isMobile && (!!activeSession || roomThreadActive),
});
// Only opt into visual-viewport sizing when we have concrete keyboard
// displacement (overlap or offset). The shared hook can report `keyboardOpen`
// during iOS settle/shrink phases with zero overlap; forcing vv-height in that
// transient state shrinks the thread and pushes the composer upward.
const hasKeyboardViewportDisplacement = keyboardOverlap > 0 || viewportOffsetTop > 0;
const threadKeyboardStyle: CSSProperties =
keyboardOpen && hasKeyboardViewportDisplacement
? ({
"--keyboard-overlap": `${keyboardOverlap}px`,
"--vv-offset-top": `${viewportOffsetTop}px`,
...(viewportHeight !== null ? { "--vv-height": `${viewportHeight}px` } : {}),
} as CSSProperties)
: {};
const threadClassName = `chat-thread${keyboardOpen && hasKeyboardViewportDisplacement ? " chat-thread--keyboard-active" : ""}`;
const filteredSkills = useMemo(() => {
const normalizedFilter = skillFilter.trim().toLowerCase();
const matchingSkills = normalizedFilter
? discoveredSkills.filter((skill) => skill.name.toLowerCase().includes(normalizedFilter))
: discoveredSkills;
return matchingSkills.slice(0, 10);
}, [discoveredSkills, skillFilter]);
const mentionAgents = useMemo(() => Array.from(agentsMap.values()), [agentsMap]);
const roomContext = useMemo<RoomContext | null>(() => {
if (!chatRoomsEnabled || chatScope !== "rooms" || !rooms.activeRoom) {
return null;
}
return {
roomId: rooms.activeRoom.id,
roomName: rooms.activeRoom.name,
memberIds: new Set(rooms.activeRoomMembers.map((member) => member.agentId)),
};
}, [chatRoomsEnabled, chatScope, rooms.activeRoom, rooms.activeRoomMembers]);
const filteredMentionAgents = useMemo(() => {
const matchingAgents = mentionAgents.filter((agent) => matchesAgentMentionFilter(agent.name, mentionFilter));
if (!roomContext) {
return matchingAgents;
}
const memberAgents = matchingAgents.filter((agent) => roomContext.memberIds.has(agent.id));
if (mentionFilter.trim().length === 0) {
return memberAgents;
}
const otherAgents = matchingAgents.filter((agent) => !roomContext.memberIds.has(agent.id));
return [...memberAgents, ...otherAgents];
}, [mentionAgents, mentionFilter, roomContext]);
const mentionAgentsByName = useMemo(() => {
const byName = new Map<string, Agent>();
for (const agent of mentionAgents) {
byName.set(agent.name.toLowerCase(), agent);
}
return byName;
}, [mentionAgents]);
useEffect(() => {
setHighlightedSkillIndex(0);
}, [filteredSkills]);
useEffect(() => {
setMentionHighlightIndex(0);
}, [mentionFilter, mentionPopupVisible]);
useEffect(() => {
return () => {
if (hideSkillMenuTimeoutRef.current !== null) {
window.clearTimeout(hideSkillMenuTimeoutRef.current);
}
};
}, []);
const updateScrollState = useCallback(() => {
const messagesContainer = messagesContainerRef.current;
if (!messagesContainer) return;
const threshold = 50;
const atBottom = messagesContainer.scrollTop + messagesContainer.clientHeight >= messagesContainer.scrollHeight - threshold;
setIsUserScrolling(!atBottom);
isUserScrollingRef.current = !atBottom;
}, []);
const anchorToBottom = useCallback((container: HTMLElement) => {
if (!container.isConnected) return;
let frame = 0;
let stableFrames = 0;
let lastScrollHeight = -1;
const maxFrames = 6;
const writeBottom = () => {
if (!container.isConnected) return;
container.scrollTop = container.scrollHeight;
if (container.scrollHeight === lastScrollHeight) {
stableFrames += 1;
} else {
stableFrames = 0;
lastScrollHeight = container.scrollHeight;
}
frame += 1;
if (frame >= maxFrames || stableFrames >= 2) {
setIsUserScrolling(false);
isUserScrollingRef.current = false;
return;
}
window.requestAnimationFrame(writeBottom);
};
writeBottom();
}, []);
const scrollToBottom = useCallback(() => {
const messagesContainer = messagesContainerRef.current;
if (!messagesContainer) return;
anchorToBottom(messagesContainer);
}, [anchorToBottom]);
useLayoutEffect(() => {
if (directThreadDeferredAnchorTimeoutRef.current !== null) {
window.clearTimeout(directThreadDeferredAnchorTimeoutRef.current);
directThreadDeferredAnchorTimeoutRef.current = null;
}
const threadId = roomThreadActive ? (rooms.activeRoom?.id ?? null) : (activeSession?.id ?? null);
if (!threadId) {
lastAnchoredThreadStateRef.current = null;
return;
}
const nextState = {
threadId,
loaded: roomThreadActive ? !rooms.messagesLoading : !messagesLoading,
hasMessages: roomThreadActive ? rooms.messages.length > 0 : messages.length > 0,
};
const previousState = lastAnchoredThreadStateRef.current;
const isThreadChanged = previousState?.threadId !== threadId;
const finishedLoading = previousState?.threadId === threadId && !previousState.loaded && nextState.loaded;
const firstMessagesArrived =
previousState?.threadId === threadId && !previousState.hasMessages && nextState.hasMessages;
const shouldAnchor = previousState === null || isThreadChanged || finishedLoading || firstMessagesArrived;
if (!shouldAnchor) {
return;
}
const messagesContainer = messagesContainerRef.current;
if (!messagesContainer) {
return;
}
anchorToBottom(messagesContainer);
if (!roomThreadActive) {
directThreadDeferredAnchorTimeoutRef.current = window.setTimeout(() => {
directThreadDeferredAnchorTimeoutRef.current = null;
if (isUserScrollingRef.current) {
return;
}
const latestContainer = messagesContainerRef.current;
if (!latestContainer) {
return;
}
anchorToBottom(latestContainer);
}, 250);
}
lastAnchoredThreadStateRef.current = nextState;
return () => {
if (directThreadDeferredAnchorTimeoutRef.current !== null) {
window.clearTimeout(directThreadDeferredAnchorTimeoutRef.current);
directThreadDeferredAnchorTimeoutRef.current = null;
}
};
}, [
roomThreadActive,
rooms.activeRoom?.id,
rooms.messages.length,
rooms.messagesLoading,
activeSession?.id,
messages.length,
messagesLoading,
anchorToBottom,
]);
const activeThreadMessages = roomThreadActive ? rooms.messages : messages;
// Scroll thread container to bottom on new messages or streaming when user is near live tail.
// Avoid Element.scrollIntoView() here because on mobile Safari it can
// scroll the page viewport instead of only the chat thread.
useEffect(() => {
if (!isUserScrollingRef.current) {
scrollToBottom();
}
}, [activeThreadMessages, streamingText, streamingThinking, isStreaming, scrollToBottom]);
useEffect(() => {
if (keyboardOverlap <= 0) {
return;
}
const messagesContainer = messagesContainerRef.current;
if (!messagesContainer) {
return;
}
scrollToBottom();
}, [keyboardOverlap, scrollToBottom]);
// Lock body scroll on mobile while the keyboard is up so iOS can't shift
// the visual viewport (offsetTop > 0). Shared hook also restores
// window.scrollTo(0, 0) on cleanup to recover from any iOS drift.
useMobileScrollLock(isMobile && keyboardOpen);
// Close context menu on outside click
useEffect(() => {
const handleClick = () => setContextMenu(null);
if (contextMenu) {
document.addEventListener("click", handleClick);
return () => document.removeEventListener("click", handleClick);
}
}, [contextMenu]);
// While the keyboard is up on mobile, block touchmove gestures that
// would otherwise pan the iOS visualViewport (or scroll the document)
// and let the composer / header drift. We attach a non-passive listener
// to document so that gestures starting anywhere — header, composer
// padding, body — are cancelled. The exception is when the touch path
// crosses the messages list, which is the one place we DO want pan-y.
// useMobileScrollLock only pins document scroll; this complements it
// by stopping vv pan on top of the locked layout.
// React's synthetic onTouchMove is passive by default, so this has to
// be a native addEventListener with { passive: false }.
useEffect(() => {
if (!isMobile || !keyboardOpen) return;
const onTouchMove = (event: TouchEvent) => {
const target = event.target as Element | null;
if (target?.closest(".chat-messages")) return; // allow messages scroll
event.preventDefault();
};
document.addEventListener("touchmove", onTouchMove, { passive: false });
return () => {
document.removeEventListener("touchmove", onTouchMove);
};
}, [isMobile, keyboardOpen]);
// On mount and on visibility/page restore, if iOS thinks the keyboard is
// up but the textarea isn't actually focused (or vice versa), the
// visualViewport metrics get stuck in a half-state — composer pushed up
// or covered by a blank pane. Force a blur+refocus on the textarea to
// make iOS resync. Only runs on mobile and only when ChatView holds the
// active session (avoids stealing focus from other views).
useEffect(() => {
if (!isMobile || !activeSession) return;
const resync = () => {
const ta = inputRef.current;
if (!ta) return;
if (document.activeElement !== ta) return; // only if it was focused
ta.blur();
window.setTimeout(() => {
ta.focus({ preventScroll: true });
}, 0);
};
document.addEventListener("visibilitychange", resync);
window.addEventListener("pageshow", resync);
return () => {
document.removeEventListener("visibilitychange", resync);
window.removeEventListener("pageshow", resync);
};
}, [isMobile, activeSession]);
useEffect(() => {
const previousScope = previousChatScopeRef.current;
previousChatScopeRef.current = chatScope;
if (chatScope !== "direct") {
return;
}
if (previousScope !== null && previousScope !== "rooms") {
return;
}
const messagesContainer = messagesContainerRef.current;
if (!messagesContainer) {
return;
}
anchorToBottom(messagesContainer);
isUserScrollingRef.current = false;
setIsUserScrolling(false);
}, [chatScope, anchorToBottom]);
useEffect(() => {
if (!activeSession && !roomThreadActive) {
return;
}
if (roomThreadActive && !isMobile) {
return;
}
const reAnchorToLatest = () => {
const messagesContainer = messagesContainerRef.current;
if (!messagesContainer) {
return;
}
anchorToBottom(messagesContainer);
isUserScrollingRef.current = false;
setIsUserScrolling(false);
if (visibilityReanchorTimeoutRef.current !== null) {
window.clearTimeout(visibilityReanchorTimeoutRef.current);
visibilityReanchorTimeoutRef.current = null;
}
visibilityReanchorTimeoutRef.current = window.setTimeout(() => {
visibilityReanchorTimeoutRef.current = null;
if (isUserScrollingRef.current) {
return;
}
const connectedContainer = messagesContainerRef.current;
if (!connectedContainer) {
return;
}
anchorToBottom(connectedContainer);
}, 250);
};
const onVisibilityChange = () => {
if (document.visibilityState !== "visible") {
return;
}
reAnchorToLatest();
};
document.addEventListener("visibilitychange", onVisibilityChange);
window.addEventListener("pageshow", reAnchorToLatest);
return () => {
document.removeEventListener("visibilitychange", onVisibilityChange);
window.removeEventListener("pageshow", reAnchorToLatest);
if (visibilityReanchorTimeoutRef.current !== null) {
window.clearTimeout(visibilityReanchorTimeoutRef.current);
visibilityReanchorTimeoutRef.current = null;
}
};
}, [isMobile, activeSession, roomThreadActive, anchorToBottom]);
useEffect(() => {
if (roomThreadActive) {
return;
}
if (typeof ResizeObserver === "undefined") {
return;
}
const messagesContainer = messagesContainerRef.current;
if (!messagesContainer) {
return;
}
const observer = new ResizeObserver(() => {
if (isUserScrollingRef.current) {
return;
}
anchorToBottom(messagesContainer);
});
observer.observe(messagesContainer);
return () => {
observer.disconnect();
};
}, [roomThreadActive, anchorToBottom, activeSession?.id, chatScope]);
// Fetch agents on mount for name resolution (project-scoped with stale-request protection)
useEffect(() => {
let cancelled = false;
const currentProjectId = projectId;
fetchAgents(undefined, projectId)
.then((agents) => {
// Ignore response if project changed during fetch
if (cancelled || currentProjectId !== projectId) return;
const map = new Map<string, Agent>();
for (const agent of agents) {
map.set(agent.id, agent);
}
setAgentsMap(map);
})
.catch(() => {
// Silently fail - keep empty map
});
return () => {
cancelled = true;
};
}, [projectId]);
// Fetch discovered skills for slash command autocomplete
useEffect(() => {
let cancelled = false;
setSkillsLoading(true);
fetchDiscoveredSkills(projectId)
.then((skills) => {
if (!cancelled) {
setDiscoveredSkills(skills);
}
})
.catch(() => {
if (!cancelled) {
setDiscoveredSkills([]);
}
})
.finally(() => {
if (!cancelled) {
setSkillsLoading(false);
}
});
return () => {
cancelled = true;
};
}, [projectId]);
useEffect(() => {
pendingAttachmentsRef.current = pendingAttachments;
}, [pendingAttachments]);
useEffect(() => {
return () => {
for (const attachment of pendingAttachmentsRef.current) {
if (attachment.previewUrl) {
URL.revokeObjectURL(attachment.previewUrl);
}
}
for (const timeoutId of copyFeedbackTimeoutsRef.current.values()) {
window.clearTimeout(timeoutId);
}
copyFeedbackTimeoutsRef.current.clear();
};
}, []);
const handleAttachmentFiles = useCallback((files: FileList | File[] | null | undefined) => {
if (!files || files.length === 0) return;
const nextAttachments: PendingAttachment[] = [];
for (const file of Array.from(files)) {
if (!ALLOWED_ATTACHMENT_TYPES.includes(file.type)) {
continue;
}
const isImage = file.type.startsWith("image/");
nextAttachments.push({
file,
previewUrl: isImage ? URL.createObjectURL(file) : "",
});
}
if (nextAttachments.length > 0) {
setPendingAttachments((prev) => [...prev, ...nextAttachments]);
}
}, []);
const removeAttachment = useCallback((index: number) => {
setPendingAttachments((prev) => {
const attachment = prev[index];
if (attachment?.previewUrl) {
URL.revokeObjectURL(attachment.previewUrl);
}
return prev.filter((_, attachmentIndex) => attachmentIndex !== index);
});
}, []);
const handlePaste = useCallback((event: React.ClipboardEvent<HTMLTextAreaElement>) => {
const clipboardFiles = event.clipboardData?.files;
if (!clipboardFiles || clipboardFiles.length === 0) return;
const imageFiles = Array.from(clipboardFiles).filter((file) => file.type.startsWith("image/"));
if (imageFiles.length === 0) return;
handleAttachmentFiles(imageFiles);
}, [handleAttachmentFiles]);
// Handle create session
const handleCreateSession = useCallback(
async (input: { agentId: string; modelProvider?: string; modelId?: string }) => {
try {
await createSession(input);
setShowNewDialog(false);
// On mobile, hide sidebar after selecting
if (isMobile) setSidebarVisible(false);
} catch {
addToast("Failed to create chat session", "error");
}
},
[createSession, addToast, isMobile],
);
const resizeComposer = useCallback((textarea?: HTMLTextAreaElement | null) => {
const composer = textarea ?? inputRef.current;
if (!composer) {
return;
}
composer.style.height = "auto";
composer.style.height = `${clampChatInputHeight(composer.scrollHeight)}px`;
}, []);
useLayoutEffect(() => {
resizeComposer();
}, [messageInput, resizeComposer]);
const clearComposerState = useCallback(() => {
setMessageInput("");
if (activeDraftKey) {
try {
localStorage.removeItem(activeDraftKey);
} catch {
// Ignore storage errors.
}
}
setShowSkillMenu(false);
setSkillFilter("");
setMentionPopupVisible(false);
setMentionFilter("");
setMentionStartPos(-1);
setPendingAttachments((prev) => {
for (const attachment of prev) {
if (attachment.previewUrl) {
URL.revokeObjectURL(attachment.previewUrl);
}
}
return [];
});
}, [activeDraftKey]);
// Handle send message including pending attachment uploads.
const handleSend = useCallback(() => {
const trimmed = messageInput.trim();
const files = pendingAttachments.map((attachment) => attachment.file);
if ((!trimmed && files.length === 0) || !activeSession) return;
if (trimmed === "/clear" || trimmed === "/new") {
clearComposerState();
stopStreaming();
clearPendingMessage();
void createSession({
agentId: activeSession.agentId,
modelProvider: activeSession.modelProvider ?? undefined,
modelId: activeSession.modelId ?? undefined,
}).catch(() => {
addToast("Failed to clear conversation", "error");
});
return;
}
clearComposerState();
sendMessage(trimmed, files);
}, [
messageInput,
pendingAttachments,
activeSession,
clearComposerState,
stopStreaming,
clearPendingMessage,
createSession,
addToast,
sendMessage,
]);
const handleSendDispatch = useCallback(async () => {
const trimmed = messageInput.trim();
if (!trimmed) {
return;
}
if (chatRoomsEnabled && chatScope === "rooms") {
if (!rooms.activeRoom) {
return;
}
const previousInput = messageInput;
clearComposerState();
try {
await rooms.sendRoomMessage(trimmed);
} catch (error) {
setMessageInput(previousInput);
const message = error instanceof Error && error.message.trim()
? error.message
: "Failed to send room message";
addToast(message, "error");
}
return;
}
handleSend();
}, [messageInput, chatRoomsEnabled, chatScope, rooms, clearComposerState, addToast, handleSend]);
const handleSkillSelect = useCallback(
(skill: DiscoveredSkill) => {
setMessageInput((currentInput) => {
const triggerMatch = getSkillTriggerMatch(currentInput);
if (!triggerMatch) {
return currentInput;
}
const replacement = `/skill:${skill.name} `;
const nextInput =
currentInput.slice(0, triggerMatch.start) + replacement + currentInput.slice(triggerMatch.end);
window.requestAnimationFrame(() => {
if (!inputRef.current) return;
resizeComposer(inputRef.current);
inputRef.current.focus();
});
return nextInput;
});
setShowSkillMenu(false);
setSkillFilter("");
setHighlightedSkillIndex(0);
},
[resizeComposer],
);
const handleMentionSelect = useCallback(
(agent: Agent) => {
const textarea = inputRef.current;
if (!textarea || mentionStartPos < 0) {
return;
}
const selectionStart = textarea.selectionStart ?? mentionCursorPosRef.current;
const selectionEnd = textarea.selectionEnd ?? selectionStart;
const cursorPos = Math.max(selectionStart, selectionEnd);
const safeStart = Math.min(mentionStartPos, cursorPos);
const mentionText = `@${agent.name.replace(/\s+/g, "_")}`;
const replacement = `${mentionText} `;
const nextInput = messageInput.slice(0, safeStart) + replacement + messageInput.slice(cursorPos);
const nextCursorPos = safeStart + replacement.length;
setMessageInput(nextInput);
setMentionPopupVisible(false);
setMentionFilter("");
setMentionHighlightIndex(0);
setMentionStartPos(-1);
window.requestAnimationFrame(() => {
if (!inputRef.current) return;
resizeComposer(inputRef.current);
inputRef.current.focus();
inputRef.current.setSelectionRange(nextCursorPos, nextCursorPos);
});
},
[mentionStartPos, messageInput, resizeComposer],
);
// Handle input key down
const handleInputKeyDown = useCallback(
(e: React.KeyboardEvent<HTMLTextAreaElement>) => {
mentionCursorPosRef.current = e.currentTarget.selectionStart ?? mentionCursorPosRef.current;
// Handle file mention popup keyboard navigation first
if (fileMention.mentionActive && fileMention.files.length > 0) {
fileMention.handleKeyDown(e, messageInput);
if (e.key === "Enter" || e.key === "Tab") {
// Select the highlighted file
const file = fileMention.files[fileMention.selectedIndex];
if (file) {
const newText = fileMention.selectFile(file, messageInput);
setMessageInput(newText);
fileMention.dismissMention();
setFileMentionPopupVisible(false);
}
}
return;
}
if (mentionPopupVisible && e.key === "ArrowDown") {
e.preventDefault();
if (filteredMentionAgents.length > 0) {
setMentionHighlightIndex((prev) => (prev + 1) % filteredMentionAgents.length);
}
return;
}
if (mentionPopupVisible && e.key === "ArrowUp") {
e.preventDefault();
if (filteredMentionAgents.length > 0) {
setMentionHighlightIndex((prev) =>
prev === 0 ? filteredMentionAgents.length - 1 : prev - 1,
);
}
return;
}
if (mentionPopupVisible && e.key === "Enter") {
e.preventDefault();
const agentToSelect = filteredMentionAgents[mentionHighlightIndex] ?? filteredMentionAgents[0];
if (agentToSelect) {
handleMentionSelect(agentToSelect);
}
return;
}
if (mentionPopupVisible && e.key === "Escape") {
e.preventDefault();
setMentionPopupVisible(false);
setMentionFilter("");
setMentionStartPos(-1);
return;
}
if (showSkillMenu && e.key === "ArrowDown") {
e.preventDefault();
if (filteredSkills.length > 0) {
setHighlightedSkillIndex((prev) => (prev + 1) % filteredSkills.length);
}
return;
}
if (showSkillMenu && e.key === "ArrowUp") {
e.preventDefault();
if (filteredSkills.length > 0) {
setHighlightedSkillIndex((prev) =>
prev === 0 ? filteredSkills.length - 1 : prev - 1,
);
}
return;
}
if (showSkillMenu && (e.key === "Enter" || e.key === "Tab") && filteredSkills.length > 0) {
e.preventDefault();
const skillToSelect = filteredSkills[highlightedSkillIndex] ?? filteredSkills[0];
if (skillToSelect) {
handleSkillSelect(skillToSelect);
}
return;
}
if (showSkillMenu && e.key === "Escape") {
e.preventDefault();
setShowSkillMenu(false);
return;
}
if (e.key === "Enter" && !e.shiftKey) {
e.preventDefault();
void handleSendDispatch();
}
},
[
mentionPopupVisible,
filteredMentionAgents,
mentionHighlightIndex,
handleMentionSelect,
showSkillMenu,
filteredSkills,
highlightedSkillIndex,
handleSkillSelect,
handleSendDispatch,
fileMention,
messageInput,
],
);
const updateMentionState = useCallback((value: string, cursorPos: number) => {
const mentionTriggerMatch = getMentionTriggerMatch(value, cursorPos);
if (mentionTriggerMatch) {
setMentionPopupVisible(true);
setMentionFilter(mentionTriggerMatch.filter);
setMentionStartPos(mentionTriggerMatch.start);
return;
}
setMentionPopupVisible(false);
setMentionFilter("");
setMentionStartPos(-1);
}, []);
// Handle textarea resize
const handleInputChange = useCallback((e: React.ChangeEvent<HTMLTextAreaElement>) => {
const textarea = e.target;
const nextValue = textarea.value;
const cursorPos = textarea.selectionStart ?? nextValue.length;
mentionCursorPosRef.current = cursorPos;
setMessageInput(nextValue);
const skillTriggerMatch = getSkillTriggerMatch(nextValue);
if (skillTriggerMatch) {
setShowSkillMenu(true);
setSkillFilter(skillTriggerMatch.filter);
} else {
setShowSkillMenu(false);
setSkillFilter("");
}
updateMentionState(nextValue, cursorPos);
// Detect file mentions
fileMention.detectMention(nextValue, cursorPos);
setFileMentionPopupVisible(fileMention.mentionActive);
if (fileMention.mentionActive) {
updateFileMentionPosition(textarea);
}
resizeComposer(textarea);
}, [updateMentionState, resizeComposer]);
const handleInputSelectionChange = useCallback(
(e: React.SyntheticEvent<HTMLTextAreaElement>) => {
const textarea = e.currentTarget;
const cursorPos = textarea.selectionStart ?? textarea.value.length;
mentionCursorPosRef.current = cursorPos;
updateMentionState(textarea.value, cursorPos);
// Detect file mentions
fileMention.detectMention(textarea.value, cursorPos);
setFileMentionPopupVisible(fileMention.mentionActive);
if (fileMention.mentionActive) {
updateFileMentionPosition(textarea);
}
},
[updateMentionState, fileMention, updateFileMentionPosition],
);
const handleInputKeyUp = useCallback(
(e: React.KeyboardEvent<HTMLTextAreaElement>) => {
if (e.key === "Escape") {
return;
}
handleInputSelectionChange(e);
},
[handleInputSelectionChange],
);
const handleInputBlur = useCallback(() => {
if (hideSkillMenuTimeoutRef.current !== null) {
window.clearTimeout(hideSkillMenuTimeoutRef.current);
}
hideSkillMenuTimeoutRef.current = window.setTimeout(() => {
setShowSkillMenu(false);
setMentionPopupVisible(false);
setMentionFilter("");
setMentionStartPos(-1);
setFileMentionPopupVisible(false);
fileMention.dismissMention();
hideSkillMenuTimeoutRef.current = null;
}, 120);
}, [fileMention]);
const handleInputFocus = useCallback(() => {
if (hideSkillMenuTimeoutRef.current !== null) {
window.clearTimeout(hideSkillMenuTimeoutRef.current);
hideSkillMenuTimeoutRef.current = null;
}
// iOS quirk: after the keyboard has been dismissed once, re-focusing
// an input leaves window.scrollY > 0 *and* visualViewport.offsetTop
// > 0 — the layout viewport drifts up, and the position:fixed
// useMobileScrollLock applies to a body that is no longer at the
// top of the document. Result: the message thread anchors above
// the visible viewport with a large blank area below it. Forcing
// scroll back to (0,0) on the focus event neutralizes the drift
// before lock applies. Done in a microtask so iOS finishes its
// own scroll-into-view first.
if (typeof window !== "undefined" && window.innerWidth <= 768) {
window.setTimeout(() => {
if (window.scrollY !== 0 || window.scrollX !== 0) {
window.scrollTo(0, 0);
}
}, 0);
}
}, []);
// Handle archive
const handleArchive = useCallback(
async (id: string) => {
setContextMenu(null);
try {
await archiveSession(id);
addToast("Conversation archived", "success");
} catch {
addToast("Failed to archive conversation", "error");
}
},
[archiveSession, addToast],
);
// Handle delete
const handleDelete = useCallback(
async (id: string) => {
setConfirmDelete(null);
setContextMenu(null);
try {
await deleteSession(id);
addToast("Conversation deleted", "success");
} catch {
addToast("Failed to delete conversation", "error");
}
},
[deleteSession, addToast],
);
const persistSidebarWidth = useCallback((width: number) => {
try {
localStorage.setItem(CHAT_SIDEBAR_STORAGE_KEY, String(width));
} catch {
// Ignore storage errors.
}
}, []);
const handleResizeStart = useCallback((event: React.PointerEvent<HTMLDivElement>) => {
if (isMobile) {
return;
}
event.preventDefault();
event.stopPropagation();
const resizeHandle = event.currentTarget;
if (typeof resizeHandle.setPointerCapture === "function") {
resizeHandle.setPointerCapture(event.pointerId);
}
const startX = event.clientX;
const startWidth = sidebarWidth;
let latestWidth = startWidth;
document.body.style.userSelect = "none";
const onPointerMove = (moveEvent: PointerEvent) => {
const deltaX = moveEvent.clientX - startX;
const nextWidth = Math.max(CHAT_SIDEBAR_MIN_WIDTH, Math.min(CHAT_SIDEBAR_MAX_WIDTH, startWidth + deltaX));
latestWidth = nextWidth;
setSidebarWidth(nextWidth);
persistSidebarWidth(nextWidth);
};
const onPointerUp = (upEvent: PointerEvent) => {
if (typeof resizeHandle.releasePointerCapture === "function") {
resizeHandle.releasePointerCapture(upEvent.pointerId);
}
document.body.style.userSelect = "";
document.removeEventListener("pointermove", onPointerMove);
document.removeEventListener("pointerup", onPointerUp);
persistSidebarWidth(latestWidth);
};
document.addEventListener("pointermove", onPointerMove);
document.addEventListener("pointerup", onPointerUp);
}, [isMobile, persistSidebarWidth, sidebarWidth]);
const handleResizeKeyDown = useCallback((event: React.KeyboardEvent<HTMLDivElement>) => {
if (isMobile) {
return;
}
if (event.key !== "ArrowLeft" && event.key !== "ArrowRight") {
return;
}
event.preventDefault();
const step = event.shiftKey ? 50 : 10;
const delta = event.key === "ArrowLeft" ? -step : step;
const nextWidth = Math.max(CHAT_SIDEBAR_MIN_WIDTH, Math.min(CHAT_SIDEBAR_MAX_WIDTH, sidebarWidth + delta));
setSidebarWidth(nextWidth);
persistSidebarWidth(nextWidth);
}, [isMobile, persistSidebarWidth, sidebarWidth]);
// Handle session click
const handleSessionClick = useCallback(
(id: string) => {
selectSession(id);
setMobileSessionMenuOpen(false);
if (isMobile) setSidebarVisible(false);
},
[selectSession, isMobile],
);
// Handle back to sidebar (mobile)
const handleBack = useCallback(() => {
selectSession("");
setSidebarVisible(true);
setMobileSessionMenuOpen(false);
}, [selectSession]);
const handleRoomBack = useCallback(() => {
rooms.selectRoom(null);
setSidebarVisible(true);
setMobileSessionMenuOpen(false);
}, [rooms]);
// Render empty state (no active session)
const renderEmptyState = () => {
return (
<div className="chat-empty-state">
<MessageSquare size={48} strokeWidth={1.5} />
<h2>Start a new conversation</h2>
<button className="btn btn-primary" onClick={() => setShowNewDialog(true)}>
<Plus size={16} />
New Chat
</button>
</div>
);
};
const activeModelTag = formatModelTag(activeSession?.modelProvider, activeSession?.modelId);
const activeModelProvider = activeSession?.modelProvider ?? null;
const hasThreadInView = Boolean(activeSession || isStreaming || messages.length > 0);
const hasMobileDetailSelection = chatScope === "rooms" ? roomThreadActive : Boolean(activeSession);
const previousHasMobileDetailSelectionRef = useRef(hasMobileDetailSelection);
useEffect(() => {
const previousHasMobileDetailSelection = previousHasMobileDetailSelectionRef.current;
previousHasMobileDetailSelectionRef.current = hasMobileDetailSelection;
if (!isMobile) {
return;
}
if (previousHasMobileDetailSelection || !hasMobileDetailSelection) {
return;
}
// Mobile list/detail surfaces must stack a view entry on top of the
// shared browser-history nav entry so swipe-back returns to the list.
pushNav({
type: "view",
revert: chatScope === "rooms" ? handleRoomBack : handleBack,
});
}, [chatScope, handleBack, handleRoomBack, hasMobileDetailSelection, isMobile, pushNav]);
const threadHeaderTitle = activeSession?.agentId === FN_AGENT_ID
? (activeModelTag ?? "Fusion")
: activeSession?.title || agentsMap.get(activeSession?.agentId ?? "")?.name || activeSession?.agentId || "Chat";
const showThreadHeaderModelTag = Boolean(activeModelTag && activeModelTag !== threadHeaderTitle);
const showMobileSessionSwitcher = isMobile && chatScope === "direct" && !!activeSession;
const agentName =
agentsMap.get(activeSession?.agentId ?? "")?.name ||
(activeSession?.agentId === FN_AGENT_ID
? (activeModelTag ?? "Fusion")
: (activeSession?.agentId?.slice(0, 30) ?? "Fusion"));
// The model tag is already visible in the thread header — repeating it on
// every assistant message is noise. Keep it suppressed for regular chat
// (real agent name is the identity); QuickChat already collapses the tag
// because its `agentName` IS the model tag, so the per-message slot was
// always empty there too.
const showAssistantModelTag = false;
// In model-only chats (no real agent picked) the agent identity *is* the
// model name, which is already in the thread header. Repeating it on every
// assistant bubble is noise. Hide the per-message identity row entirely;
// the render-mode toggle still appears in a slim toolbar.
const hideAssistantIdentity = activeSession?.agentId === FN_AGENT_ID;
const pendingPreview = pendingMessage.length > 50
? `${pendingMessage.slice(0, 50)}`
: pendingMessage;
const toggleAllAsPlain = useCallback(() => {
setShowAllAsPlain((value) => !value);
}, []);
useEffect(() => {
if (!mobileSessionMenuOpen) {
return;
}
const handlePointerDown = (event: MouseEvent) => {
if (mobileSessionMenuRef.current?.contains(event.target as Node)) {
return;
}
setMobileSessionMenuOpen(false);
};
document.addEventListener("mousedown", handlePointerDown);
return () => {
document.removeEventListener("mousedown", handlePointerDown);
};
}, [mobileSessionMenuOpen]);
useEffect(() => {
if (!isMobile || chatScope !== "direct" || sidebarVisible) {
setMobileSessionMenuOpen(false);
}
}, [isMobile, chatScope, sidebarVisible]);
const setCopyFeedback = useCallback((messageId: string, feedback: CopyFeedbackState) => {
const existingTimeout = copyFeedbackTimeoutsRef.current.get(messageId);
if (existingTimeout) {
window.clearTimeout(existingTimeout);
}
setCopyFeedbackByMessageId((current) => ({ ...current, [messageId]: feedback }));
const timeoutId = window.setTimeout(() => {
setCopyFeedbackByMessageId((current) => {
const { [messageId]: _removed, ...rest } = current;
return rest;
});
copyFeedbackTimeoutsRef.current.delete(messageId);
}, 2000);
copyFeedbackTimeoutsRef.current.set(messageId, timeoutId);
}, []);
const handleCopyResponse = useCallback(async (messageId: string, content: string) => {
try {
if (!navigator.clipboard?.writeText) {
throw new Error("Clipboard API unavailable");
}
await navigator.clipboard.writeText(content);
setCopyFeedback(messageId, "success");
} catch {
setCopyFeedback(messageId, "error");
}
}, [setCopyFeedback]);
const renderAssistantContent = useCallback(
(content: string, forcePlain = false) => {
const showPlainText = forcePlain;
if (showPlainText) {
return <div className="chat-message-content chat-message-content--plain">{content}</div>;
}
return (
<div className="chat-message-content chat-message-content--markdown">
<ReactMarkdown remarkPlugins={[remarkGfm]} components={chatMarkdownComponents}>
{content}
</ReactMarkdown>
</div>
);
},
[],
);
const showProviderResponseCopy = activeSession?.agentId === FN_AGENT_ID;
const renderCopyAction = useCallback((messageId: string, content: string, testId?: string) => (
<button
type="button"
className={`btn-icon chat-message-copy-action${copyFeedbackByMessageId[messageId] === "success" ? " chat-message-copy-action--success" : ""}${copyFeedbackByMessageId[messageId] === "error" ? " chat-message-copy-action--error" : ""}`}
data-testid={testId ?? `chat-copy-response-${messageId}`}
aria-label={copyFeedbackByMessageId[messageId] === "success" ? "Response copied" : copyFeedbackByMessageId[messageId] === "error" ? "Copy failed" : "Copy response"}
onClick={() => {
void handleCopyResponse(messageId, content);
}}
>
{copyFeedbackByMessageId[messageId] === "success" ? <Check size={14} /> : <Copy size={14} />}
</button>
), [copyFeedbackByMessageId, handleCopyResponse]);
return (
<div className="chat-view">
{/* Sidebar */}
<div
className={`chat-sidebar${!sidebarVisible ? " chat-sidebar--hidden" : ""}`}
style={isMobile ? undefined : { width: `${sidebarWidth}px` }}
>
{chatRoomsEnabled && (
<div className="chat-sidebar-scope-toggle" role="tablist" data-testid="chat-sidebar-scope-toggle">
<button
type="button"
role="tab"
className={`chat-sidebar-scope-btn${chatScope === "direct" ? " chat-sidebar-scope-btn--active" : ""}`}
aria-selected={chatScope === "direct"}
data-testid="chat-sidebar-scope-direct"
onClick={() => setChatScope("direct")}
>
Direct
</button>
<button
type="button"
role="tab"
className={`chat-sidebar-scope-btn${chatScope === "rooms" ? " chat-sidebar-scope-btn--active" : ""}`}
aria-selected={chatScope === "rooms"}
data-testid="chat-sidebar-scope-rooms"
onClick={() => setChatScope("rooms")}
>
Rooms
</button>
</div>
)}
{!chatRoomsEnabled || chatScope === "direct" ? (
<>
{/* Search section */}
<div className="chat-sidebar-search-container">
<div className="chat-sidebar-search-wrapper">
<Search size={14} className="chat-sidebar-search-icon" />
<input
type="text"
className="chat-sidebar-search"
placeholder="Search conversations..."
value={searchQuery}
onChange={(e) => setSearchQuery(e.target.value)}
data-testid="chat-search-input"
/>
</div>
</div>
{/* Session list section */}
<div className="chat-session-list chat-sidebar-list">
{sessionsLoading ? (
<div className="chat-empty-state chat-empty-state--padded">Loading...</div>
) : filteredSessions.length === 0 ? (
<div className="chat-empty-state chat-empty-state--padded">No conversations yet</div>
) : (
filteredSessions.map((session) => (
<div
key={session.id}
className={`chat-session-item${activeSession?.id === session.id ? " chat-session-item--active" : ""}`}
onClick={() => handleSessionClick(session.id)}
onContextMenu={(e) => {
e.preventDefault();
setContextMenu({ sessionId: session.id, x: e.clientX, y: e.clientY });
}}
data-testid={`chat-session-${session.id}`}
>
<button
className="chat-session-delete-btn"
onClick={(e) => {
e.stopPropagation();
setConfirmDelete(session.id);
}}
data-testid="chat-session-delete-btn"
aria-label="Delete conversation"
>
<Trash2 size={14} />
</button>
<div className="chat-session-title">{session.title || "Untitled"}</div>
<div className="chat-session-preview">
{session.lastMessagePreview || "No messages"}
</div>
<div className="chat-session-meta">
<span className="chat-session-meta-model">
{session.modelProvider && (
<ProviderIcon provider={session.modelProvider} size="sm" />
)}
<span>
{agentsMap.get(session.agentId)?.name ||
(session.agentId === FN_AGENT_ID
? (formatModelTag(session.modelProvider, session.modelId) ?? "Fusion")
: session.agentId.slice(0, 30))}
</span>
</span>
<span>{session.updatedAt ? formatRelativeTime(session.updatedAt) : ""}</span>
</div>
</div>
))
)}
</div>
</>
) : (
<div className="chat-sidebar-rooms" data-testid="chat-sidebar-rooms">
{!isMobile && (
<div className="chat-sidebar-rooms-header" data-testid="chat-sidebar-rooms-header">
<button
type="button"
className="btn btn-sm btn-primary"
data-testid="chat-create-room-btn"
onClick={() => setCreateRoomOpen(true)}
>
<Plus size={14} />
Create room
</button>
</div>
)}
{rooms.rooms.length === 0 ? (
<div className="chat-sidebar-rooms-empty" data-testid="chat-sidebar-rooms-empty">
No rooms yet.
</div>
) : (
<div className="chat-session-list chat-sidebar-list">
{rooms.rooms.map((room) => {
const isActive = rooms.activeRoom?.id === room.id;
return (
<div
key={room.id}
role="button"
tabIndex={0}
className={`chat-room-item${isActive ? " chat-room-item--active" : ""}`}
data-testid={`chat-room-item-${room.slug}`}
onClick={() => {
rooms.selectRoom(room.id);
if (isMobile) {
setSidebarVisible(false);
}
}}
onKeyDown={(event) => {
if (event.key === "Enter" || event.key === " ") {
event.preventDefault();
rooms.selectRoom(room.id);
if (isMobile) {
setSidebarVisible(false);
}
}
}}
>
<span className="chat-room-item-details">
<span className="chat-room-item-name">#{room.name}</span>
{isActive ? (
<span className="chat-room-item-meta">
{rooms.activeRoomMembers.length} {rooms.activeRoomMembers.length === 1 ? "member" : "members"}
</span>
) : null}
</span>
<button
type="button"
className="btn-icon chat-room-item-delete"
data-testid={`chat-room-delete-${room.slug}`}
aria-label={`Delete room ${room.name}`}
onClick={(event) => {
event.stopPropagation();
setConfirmDeleteRoomId(room.id);
}}
>
<Trash2 size={14} />
</button>
</div>
);
})}
</div>
)}
</div>
)}
{chatScope === "rooms" ? (
isMobile ? (
<div className="chat-sidebar-footer">
<button
type="button"
className="btn btn-sm btn-primary chat-sidebar-footer-btn"
data-testid="chat-create-room-btn"
onClick={() => setCreateRoomOpen(true)}
>
<Plus size={14} />
Create room
</button>
</div>
) : null
) : (
<div className="chat-sidebar-footer">
<button
className="btn btn-sm btn-primary chat-sidebar-footer-btn"
onClick={() => setShowNewDialog(true)}
data-testid="chat-new-btn"
>
<Plus size={14} />
New Chat
</button>
</div>
)}
</div>
{!isMobile && sidebarVisible && (
<div
className="chat-sidebar-resize-handle"
role="separator"
aria-orientation="vertical"
aria-valuemin={CHAT_SIDEBAR_MIN_WIDTH}
aria-valuemax={CHAT_SIDEBAR_MAX_WIDTH}
aria-valuenow={sidebarWidth}
aria-label="Resize chat sidebar"
tabIndex={0}
onPointerDown={handleResizeStart}
onKeyDown={handleResizeKeyDown}
/>
)}
{/* Context Menu */}
{contextMenu && (
<div
className="chat-session-context-menu"
style={{ top: contextMenu.y, left: contextMenu.x }}
onClick={(e) => e.stopPropagation()}
>
<button
onClick={() => handleArchive(contextMenu.sessionId)}
data-testid="chat-context-archive"
>
<Archive size={14} />
Archive
</button>
<button
onClick={() => {
setContextMenu(null);
setConfirmDelete(contextMenu.sessionId);
}}
data-testid="chat-context-delete"
>
<Trash2 size={14} />
Delete
</button>
</div>
)}
{/* Confirm Delete Dialog */}
{confirmDelete && (
<div className="chat-new-dialog-backdrop chat-view-dialog-backdrop" onClick={() => setConfirmDelete(null)}>
<div className="chat-new-dialog chat-view-dialog" onClick={(e) => e.stopPropagation()}>
<h3>Delete Conversation?</h3>
<p className="chat-view-delete-dialog-copy">
This action cannot be undone. All messages in this conversation will be permanently deleted.
</p>
<div className="chat-new-dialog-actions">
<button className="btn btn-sm" onClick={() => setConfirmDelete(null)}>
Cancel
</button>
<button
className="btn btn-sm btn-danger"
onClick={() => void handleDelete(confirmDelete)}
>
Delete
</button>
</div>
</div>
</div>
)}
{chatRoomsEnabled && confirmDeleteRoomId && (
<div className="chat-new-dialog-backdrop chat-view-dialog-backdrop" onClick={() => setConfirmDeleteRoomId(null)}>
<div className="chat-new-dialog chat-view-dialog" onClick={(e) => e.stopPropagation()}>
<h3>Delete Room?</h3>
<p className="chat-view-delete-dialog-copy">
This action cannot be undone. This room and all its messages will be permanently deleted.
</p>
<div className="chat-new-dialog-actions">
<button className="btn btn-sm" onClick={() => setConfirmDeleteRoomId(null)}>
Cancel
</button>
<button
className="btn btn-sm btn-danger"
onClick={() => {
void (async () => {
try {
await rooms.deleteRoom(confirmDeleteRoomId);
setConfirmDeleteRoomId(null);
} catch {
addToast("Failed to delete room", "error");
}
})();
}}
>
Delete
</button>
</div>
</div>
</div>
)}
{/* Thread */}
{chatRoomsEnabled && chatScope === "rooms" ? (
<div className={threadClassName} style={threadKeyboardStyle}>
{rooms.activeRoom ? (
<>
<div className="chat-room-thread-header">
{isMobile && (
<button className="btn-icon" onClick={handleRoomBack} data-testid="chat-back-btn">
<ChevronLeft size={16} />
</button>
)}
<div className="chat-thread-header-title">#{rooms.activeRoom.name}</div>
<div className="chat-room-thread-members">
{rooms.activeRoomMembers.map((member) => (
<AgentAvatar
key={member.agentId}
agent={
agentsMap.get(member.agentId) ?? {
id: member.agentId,
name: member.agentId.slice(0, 30),
}
}
/>
))}
</div>
</div>
<div className="chat-messages" ref={messagesContainerRef} onScroll={updateScrollState}>
{rooms.messagesLoading ? (
<div className="chat-empty-state">Loading messages...</div>
) : rooms.messages.length === 0 ? (
<div className="chat-empty-state">No messages yet. Start the conversation!</div>
) : (
rooms.messages.map((message) => {
const senderName = message.senderAgentId ? (agentsMap.get(message.senderAgentId)?.name ?? message.senderAgentId.slice(0, 30)) : "You";
const roomMessage: ChatMessageInfo = {
id: message.id,
sessionId: message.roomId,
role: message.role,
content: message.content,
thinkingOutput: message.thinkingOutput ?? undefined,
toolCalls: undefined,
fallbackInfo: undefined,
attachments: message.attachments,
createdAt: message.createdAt,
};
return (
<ChatMessageItem
key={message.id}
message={roomMessage}
forcePlain={showAllAsPlain}
agentName={senderName}
hideAssistantIdentity={false}
showAssistantModelTag={false}
activeModelTag={null}
activeModelProvider={null}
activeSessionId={rooms.activeRoom?.id ?? null}
mentionAgentsByName={mentionAgentsByName}
roomContext={roomContext}
/>
);
})
)}
<div ref={messagesEndRef} />
</div>
{rooms.activeRoom && isUserScrolling && (
<button
type="button"
className="btn btn-sm chat-jump-to-latest"
data-testid="chat-jump-to-latest"
onClick={scrollToBottom}
>
<ChevronDown size={14} />
Latest
</button>
)}
</>
) : (
<div className="chat-room-empty-pane" data-testid="chat-rooms-empty-pane">Select a room or create one</div>
)}
{rooms.activeRoom && (
<div className="chat-input-area">
<div className="chat-input-row">
<div className="chat-input-wrapper">
<textarea
ref={inputRef}
className="chat-input-textarea"
placeholder="Type a message..."
value={messageInput}
onChange={handleInputChange}
onKeyDown={handleInputKeyDown}
onKeyUp={handleInputKeyUp}
onClick={handleInputSelectionChange}
onBlur={handleInputBlur}
onFocus={handleInputFocus}
onTouchStart={(event) => {
if (typeof window === "undefined") return;
if (window.innerWidth > 768) return;
if (document.activeElement === event.currentTarget) return;
event.preventDefault();
event.currentTarget.focus({ preventScroll: true });
}}
rows={1}
data-testid="chat-input"
/>
<AgentMentionPopup
agents={mentionAgents}
filter={mentionFilter}
highlightedIndex={mentionHighlightIndex}
visible={mentionPopupVisible}
onSelect={handleMentionSelect}
position="below"
roomMemberIds={roomContext?.memberIds}
roomName={roomContext?.roomName}
/>
</div>
<button
type="button"
className="chat-input-send"
// Keep keyboard up when sending. preventDefault fires on
// pointerdown for touch pointers (BEFORE iOS blurs the
// textarea — the synthesized mousedown is too late on
// iOS), and on mousedown for desktop. Crucially we do NOT
// call preventDefault on touchstart and we do NOT run the
// action here — both of those broke quick taps. Click
// still fires from the iOS touch sequence and runs the
// action reliably.
onPointerDown={(event) => {
if (event.pointerType && event.pointerType !== "mouse") {
event.preventDefault();
}
}}
onMouseDown={(event) => {
event.preventDefault();
}}
onClick={() => {
void handleSendDispatch();
}}
disabled={!messageInput.trim()}
data-testid="chat-send-btn"
style={{ touchAction: "manipulation" }}
>
<Send size={16} />
</button>
</div>
</div>
)}
</div>
) : (
<div className={threadClassName} style={threadKeyboardStyle}>
{/* Header - always rendered in desktop/tablet, only rendered in mobile when viewing a thread */}
{(hasThreadInView || !isMobile) && (
<div className="chat-thread-header">
{isMobile && hasThreadInView && (
<button className="btn-icon" onClick={handleBack} data-testid="chat-back-btn">
<ChevronLeft size={16} />
</button>
)}
<div className="chat-thread-header-identity" data-testid="chat-thread-header-identity">
{showMobileSessionSwitcher ? (
<div className="chat-mobile-session-menu" ref={mobileSessionMenuRef}>
<button
type="button"
className="btn chat-mobile-session-trigger"
data-testid="chat-mobile-session-trigger"
aria-haspopup="menu"
aria-expanded={mobileSessionMenuOpen}
onClick={() => setMobileSessionMenuOpen((open) => !open)}
>
{activeModelProvider ? <ProviderIcon provider={activeModelProvider} size="md" /> : <Bot size={16} />}
<span className="chat-thread-header-title">{threadHeaderTitle}</span>
{showThreadHeaderModelTag && <span className="chat-model-tag">{activeModelTag}</span>}
<ChevronDown size={16} aria-hidden="true" />
</button>
{mobileSessionMenuOpen && (
<div className="chat-mobile-session-dropdown" role="menu" data-testid="chat-mobile-session-dropdown">
{filteredSessions.map((session) => (
<button
key={session.id}
type="button"
role="menuitem"
className={`chat-mobile-session-option${activeSession?.id === session.id ? " chat-mobile-session-option--active" : ""}`}
data-testid={`chat-mobile-session-option-${session.id}`}
onClick={() => handleSessionClick(session.id)}
>
<span className="chat-mobile-session-option-title">{session.title || "Untitled"}</span>
</button>
))}
</div>
)}
</div>
) : (
<>
{activeModelProvider ? <ProviderIcon provider={activeModelProvider} size="md" /> : <Bot size={16} />}
<span className="chat-thread-header-title">{threadHeaderTitle}</span>
{showThreadHeaderModelTag && <span className="chat-model-tag">{activeModelTag}</span>}
</>
)}
</div>
{hasThreadInView && (
<button
type="button"
className={`chat-thread-header-render-toggle${showAllAsPlain ? " chat-thread-header-render-toggle--plain" : ""}`}
data-testid="chat-thread-render-toggle"
aria-label={showAllAsPlain ? "Show all messages as rendered Markdown" : "Show all messages as plain text"}
onClick={toggleAllAsPlain}
>
{showAllAsPlain ? <EyeOff size={14} /> : <Eye size={14} />}
</button>
)}
{!isMobile && (
<button
className="btn btn-sm btn-primary chat-thread-header-new-chat"
onClick={() => setShowNewDialog(true)}
data-testid="chat-thread-new-chat-btn"
>
<Plus size={14} />
New Chat
</button>
)}
</div>
)}
{/* Messages */}
<div className="chat-messages" ref={messagesContainerRef} onScroll={updateScrollState}>
{isStreaming ? (
<>
{messages.map((message) => (
<ChatMessageItem
key={message.id}
message={message}
forcePlain={showAllAsPlain}
agentName={agentName}
hideAssistantIdentity={hideAssistantIdentity}
showAssistantModelTag={showAssistantModelTag}
activeModelTag={activeModelTag}
activeModelProvider={activeModelProvider}
activeSessionId={activeSession?.id ?? null}
mentionAgentsByName={mentionAgentsByName}
roomContext={null}
copyAction={showProviderResponseCopy && message.role === "assistant" ? renderCopyAction(message.id, message.content) : undefined}
/>
))}
<div className="chat-message chat-message--assistant chat-message--streaming">
{!hideAssistantIdentity && (
<div className="chat-message-avatar">
{activeModelProvider ? <ProviderIcon provider={activeModelProvider} size="sm" /> : <Bot size={14} />}
<span>{agentName}</span>
{showAssistantModelTag && <span className="chat-model-tag">{activeModelTag}</span>}
</div>
)}
{streamingText ? (
renderAssistantContent(streamingText, showAllAsPlain)
) : (
<div className="chat-message-content chat-message-content--waiting">
{streamingThinking ? "Thinking…" : "Connecting…"}
</div>
)}
{showProviderResponseCopy && streamingText && renderCopyAction("__streaming__", streamingText, "chat-copy-response-streaming")}
{renderToolCalls(streamingToolCalls)}
{streamingThinking && (
<details className="chat-message-thinking">
<summary>Thinking</summary>
<pre className="chat-message-thinking-content">{linkifyFilePaths(streamingThinking)}</pre>
</details>
)}
<div className="chat-typing-indicator">
<span />
<span />
<span />
</div>
</div>
</>
) : messagesLoading ? (
<div className="chat-empty-state">Loading messages...</div>
) : messages.length === 0 && !activeSession ? (
renderEmptyState()
) : messages.length === 0 && activeSession ? (
<div className="chat-empty-state">No messages yet. Start the conversation!</div>
) : (
<>
{messages.map((message) => (
<ChatMessageItem
key={message.id}
message={message}
forcePlain={showAllAsPlain}
agentName={agentName}
hideAssistantIdentity={hideAssistantIdentity}
showAssistantModelTag={showAssistantModelTag}
activeModelTag={activeModelTag}
activeModelProvider={activeModelProvider}
activeSessionId={activeSession?.id ?? null}
mentionAgentsByName={mentionAgentsByName}
roomContext={null}
copyAction={showProviderResponseCopy && message.role === "assistant" ? renderCopyAction(message.id, message.content) : undefined}
/>
))}
</>
)}
<div ref={messagesEndRef} />
</div>
{isUserScrolling && (
<button
type="button"
className="btn btn-sm chat-jump-to-latest"
data-testid="chat-jump-to-latest"
onClick={scrollToBottom}
>
<ChevronDown size={14} />
Latest
</button>
)}
{/* Input */}
{activeSession && (
<div className="chat-input-area">
<input
ref={fileInputRef}
type="file"
accept="image/*,.txt,.json,.yaml,.yml,.log,.csv,.xml,.md"
multiple
style={{ display: "none" }}
onChange={(event) => {
handleAttachmentFiles(event.target.files);
event.target.value = "";
}}
/>
{showSkillMenu && (
<div className="chat-skill-menu" data-testid="chat-skill-menu" role="listbox" aria-label="Skill suggestions">
{skillsLoading ? (
<div className="chat-skill-menu-empty">Loading skills</div>
) : filteredSkills.length === 0 ? (
<div className="chat-skill-menu-empty">
{skillFilter ? "No skills found" : "No skills available"}
</div>
) : (
filteredSkills.map((skill, index) => (
<button
key={skill.id}
type="button"
role="option"
aria-selected={index === highlightedSkillIndex}
className={`chat-skill-menu-item${index === highlightedSkillIndex ? " chat-skill-menu-item--highlighted" : ""}`}
onMouseDown={(e) => e.preventDefault()}
onMouseEnter={() => setHighlightedSkillIndex(index)}
onClick={() => handleSkillSelect(skill)}
>
<span className="chat-skill-menu-item-name">{skill.name}</span>
<span className="chat-skill-menu-item-description" title={skill.relativePath}>
{skill.relativePath}
</span>
</button>
))
)}
</div>
)}
{pendingAttachments.length > 0 && (
<div className="chat-attachment-previews" data-testid="chat-attachment-previews">
{pendingAttachments.map((attachment, index) => (
<div
key={attachment.previewUrl || `${attachment.file.name}-${index}`}
className="chat-attachment-preview"
data-testid={`chat-attachment-preview-${index}`}
>
{attachment.previewUrl ? (
<img src={attachment.previewUrl} alt={attachment.file.name} />
) : (
<span className="chat-attachment-preview-name">{attachment.file.name}</span>
)}
<button
type="button"
className="chat-attachment-remove"
onClick={() => removeAttachment(index)}
data-testid={`chat-attachment-remove-${index}`}
aria-label={`Remove ${attachment.file.name}`}
>
×
</button>
</div>
))}
</div>
)}
<div className="chat-input-row">
<button
type="button"
className="btn-icon chat-attach-btn"
data-testid="chat-attach-btn"
aria-label="Attach files"
onClick={() => fileInputRef.current?.click()}
>
<Paperclip size={16} />
</button>
<div
className={`chat-input-wrapper${isDragOver ? " chat-input-wrapper--dragover" : ""}`}
onDragOver={(event) => {
event.preventDefault();
setIsDragOver(true);
}}
onDragLeave={() => setIsDragOver(false)}
onDrop={(event) => {
event.preventDefault();
setIsDragOver(false);
handleAttachmentFiles(event.dataTransfer.files);
}}
>
<textarea
ref={inputRef}
className="chat-input-textarea"
placeholder="Type a message..."
value={messageInput}
onChange={handleInputChange}
onKeyDown={handleInputKeyDown}
onKeyUp={handleInputKeyUp}
onClick={handleInputSelectionChange}
onBlur={handleInputBlur}
onFocus={handleInputFocus}
onPaste={handlePaste}
onTouchStart={(event) => {
if (typeof window === "undefined") return;
if (window.innerWidth > 768) return;
if (document.activeElement === event.currentTarget) return;
event.preventDefault();
event.currentTarget.focus({ preventScroll: true });
}}
rows={1}
data-testid="chat-input"
/>
<AgentMentionPopup
agents={mentionAgents}
filter={mentionFilter}
highlightedIndex={mentionHighlightIndex}
visible={mentionPopupVisible}
onSelect={handleMentionSelect}
position="below"
roomMemberIds={roomContext?.memberIds}
roomName={roomContext?.roomName}
/>
<FileMentionPopup
visible={fileMention.mentionActive && !mentionPopupVisible}
position={fileMentionPosition}
files={fileMention.files}
selectedIndex={fileMention.selectedIndex}
onSelect={(file) => {
const newText = fileMention.selectFile(file, messageInput);
setMessageInput(newText);
fileMention.dismissMention();
setFileMentionPopupVisible(false);
inputRef.current?.focus();
}}
loading={fileMention.loading}
/>
{pendingMessage && (
<div className="chat-pending-message" data-testid="chat-pending-indicator">
<span>{`Queued: ${pendingPreview}`}</span>
<button
type="button"
className="chat-pending-message-dismiss"
aria-label="Dismiss queued message"
data-testid="chat-pending-dismiss"
onClick={clearPendingMessage}
>
×
</button>
</div>
)}
</div>
{isStreaming ? (
<button
className="chat-input-stop"
onClick={stopStreaming}
aria-label="Stop generation"
data-testid="chat-stop-btn"
>
<Square size={14} />
</button>
) : (
<button
type="button"
className="chat-input-send"
// Keep keyboard up when sending. preventDefault fires on
// pointerdown for touch pointers (BEFORE iOS blurs the
// textarea — the synthesized mousedown is too late on
// iOS), and on mousedown for desktop. Crucially we do NOT
// call preventDefault on touchstart and we do NOT run the
// action here — both of those broke quick taps. Click
// still fires from the iOS touch sequence and runs the
// action reliably.
onPointerDown={(event) => {
if (event.pointerType && event.pointerType !== "mouse") {
event.preventDefault();
}
}}
onMouseDown={(event) => {
event.preventDefault();
}}
onClick={() => {
void handleSend();
}}
disabled={!messageInput.trim() && pendingAttachments.length === 0}
data-testid="chat-send-btn"
style={{ touchAction: "manipulation" }}
>
<Send size={16} />
</button>
)}
</div>
</div>
)}
</div>
)}
{chatRoomsEnabled && (
<CreateRoomModal
isOpen={createRoomOpen}
onClose={() => setCreateRoomOpen(false)}
projectId={projectId}
existingRoomNames={rooms.rooms.map((room) => room.name)}
onCreate={async (draft) => {
await rooms.createRoom({ name: draft.name, memberAgentIds: draft.memberAgentIds });
if (chatScope !== "rooms") {
setChatScope("rooms");
}
setCreateRoomOpen(false);
if (isMobile) {
setSidebarVisible(false);
}
}}
/>
)}
{/* New Chat Dialog (rendered at root level) */}
{showNewDialog && (
<NewChatDialog
projectId={projectId}
onClose={() => setShowNewDialog(false)}
onCreate={handleCreateSession}
/>
)}
</div>
);
}