"use client";

import React, {
	useRef,
	useState,
	useCallback,
	useEffect,
	useImperativeHandle,
	forwardRef,
	KeyboardEvent,
} from "react";
import type {
	BuiltinSlashCommandResult,
	CompactResultInfo,
	QueuedMessages,
	SlashCommandInfo,
} from "@/hooks/useAgentSession";
import {
	clearDraft,
	getDraft,
	setDraft,
	type ChatDraftImage,
} from "@/lib/draft-store";
import {
	MAX_ATTACHED_IMAGE_BYTES,
	MAX_ATTACHED_IMAGES,
	compressImageFile,
	isBase64ImageWithinLimits,
} from "@/lib/image-attachments";
import {
	buildEntriesFromFiles,
	buildAtInsertText,
	extractAtQuery,
	filterFileEntries,
	type AtQueryMatch,
	type FileIndexEntry,
} from "@/lib/file-fuzzy";
import { FolderIcon, getFileIcon } from "./FileIcons";
import { useIsMobile } from "@/hooks/useIsMobile";
import { useI18n } from "@/hooks/useI18n";

export interface AttachedImage {
	data: string; // base64, no prefix
	mimeType: string;
	previewUrl: string; // object URL for display
}

interface ModelOption {
	provider: string;
	modelId: string;
	name: string;
	serviceTier?: string;
}

interface Props {
	onSend: (message: string, images?: AttachedImage[]) => void;
	onAbort: () => void;
	onSteer?: (message: string, images?: AttachedImage[]) => void;
	onFollowUp?: (message: string, images?: AttachedImage[]) => void;
	onPromptWithStreamingBehavior?: (
		message: string,
		behavior: "steer" | "followUp",
		images?: AttachedImage[],
	) => void;
	isStreaming: boolean;
	model?: { provider: string; modelId: string } | null;
	isAutoModelSelection?: boolean;
	modelNames?: Record<string, string>;
	modelList?: {
		id: string;
		name: string;
		provider: string;
		serviceTier?: string;
	}[];
	modelError?: string | null;
	onModelChange?: (provider: string, modelId: string) => void;
	onCompact?: () => void;
	onAbortCompaction?: () => void;
	isCompacting?: boolean;
	compactError?: string | null;
	compactResult?: CompactResultInfo | null;
	toolPreset?: "none" | "default" | "full";
	onToolPresetChange?: (preset: "none" | "default" | "full") => void;
	thinkingLevel?:
		| "auto"
		| "off"
		| "minimal"
		| "low"
		| "medium"
		| "high"
		| "xhigh"
		| "max";
	onThinkingLevelChange?: (
		level:
			| "auto"
			| "off"
			| "minimal"
			| "low"
			| "medium"
			| "high"
			| "xhigh"
			| "max",
	) => void;
	availableThinkingLevels?: string[] | null;
	thinkingLevelMap?: Record<string, string | null> | null;
	retryInfo?: {
		attempt: number;
		maxAttempts: number;
		errorMessage?: string;
	} | null;
	queuedMessages?: QueuedMessages | null;
	inputHistory?: string[];
	onRecallQueue?: () => void;
	slashCommands?: SlashCommandInfo[];
	slashCommandsLoading?: boolean;
	onLoadSlashCommands?: () => Promise<SlashCommandInfo[]> | SlashCommandInfo[];
	onBuiltinCommand?: (message: string) => Promise<BuiltinSlashCommandResult>;
	soundEnabled?: boolean;
	onSoundToggle?: () => void;
	onAudioUnlock?: () => void;
	draftKey?: string;
	/** Session working directory — enables the @ file autocomplete menu */
	cwd?: string | null;
}

export interface ChatInputHandle {
	insertText: (text: string) => void;
	insertIfEmpty: (text: string) => void;
	prependText: (text: string) => void;
	addImages: (files: File[]) => void;
}

const TOOL_PRESETS = ["off", "default", "full"] as const;
const TOOL_PRESET_MAP: Record<
	"off" | "default" | "full",
	"none" | "default" | "full"
> = { off: "none", default: "default", full: "full" };
const COMPOSITION_END_ENTER_GRACE_MS = 100;
const MODEL_FILTER_THRESHOLD = 8;
const MODEL_OPTION_COLLATOR = new Intl.Collator(undefined, {
	numeric: true,
	sensitivity: "base",
});

function compareModelOptions(a: ModelOption, b: ModelOption): number {
	return (
		MODEL_OPTION_COLLATOR.compare(a.name || a.modelId, b.name || b.modelId) ||
		MODEL_OPTION_COLLATOR.compare(a.provider, b.provider) ||
		MODEL_OPTION_COLLATOR.compare(a.modelId, b.modelId)
	);
}

export function filterModelOptions(
	options: ModelOption[],
	query: string,
): ModelOption[] {
	const normalizedQuery = query.trim().toLocaleLowerCase();
	if (!normalizedQuery) return options;

	return options.filter((option) =>
		`${option.name} ${option.modelId}`
			.toLocaleLowerCase()
			.includes(normalizedQuery),
	);
}

const THINKING_LEVELS = [
	"auto",
	"off",
	"minimal",
	"low",
	"medium",
	"high",
	"xhigh",
	"max",
] as const;
const THINKING_LEVEL_DESC_KEYS: Record<
	(typeof THINKING_LEVELS)[number],
	string
> = {
	auto: "chat.thinkingUseDefault",
	off: "chat.thinkingOff",
	minimal: "chat.thinkingMinimal",
	low: "chat.thinkingLow",
	medium: "chat.thinkingMedium",
	high: "chat.thinkingHigh",
	xhigh: "chat.thinkingXhigh",
	max: "chat.thinkingMax",
};

function formatTokenCount(tokens: number): string {
	if (tokens >= 1_000_000) return `${(tokens / 1_000_000).toFixed(1)}M`;
	if (tokens >= 1_000) return `${Math.round(tokens / 1_000)}k`;
	return tokens.toLocaleString();
}

type SlashCommandPaletteItem =
	| SlashCommandInfo
	| {
			name: string;
			description: string;
			source: "builtin";
	  };

type SlashCommandSource = SlashCommandPaletteItem["source"];

const BUILTIN_SLASH_COMMANDS: SlashCommandPaletteItem[] = [
	{ name: "compact", description: "chat.commandCompact", source: "builtin" },
	{ name: "reload", description: "chat.commandReload", source: "builtin" },
	{ name: "name", description: "chat.commandName", source: "builtin" },
	{ name: "session", description: "chat.commandSession", source: "builtin" },
	{ name: "copy", description: "chat.commandCopy", source: "builtin" },
];

const SLASH_SOURCES: SlashCommandSource[] = [
	"builtin",
	"extension",
	"prompt",
	"skill",
];

const SLASH_SOURCE_GROUP_LABEL_KEYS: Record<SlashCommandSource, string> = {
	builtin: "chat.builtIn",
	extension: "chat.extensions",
	prompt: "chat.prompts",
	skill: "chat.skills",
};

const SLASH_SOURCE_ORDER: Record<SlashCommandSource, number> = {
	builtin: 0,
	extension: 1,
	prompt: 2,
	skill: 3,
};

function slashMatchRank(
	command: SlashCommandPaletteItem,
	query: string,
	t: (key: string) => string,
): number {
	const name = command.name.toLowerCase();
	const description = getSlashDescription(command, t).toLowerCase();
	if (name === query) return 0;
	if (name.startsWith(query)) return 1;
	if (name.includes(query)) return 2;
	if (description.includes(query)) return 3;
	return 4;
}

function getSlashDescription(
	command: SlashCommandPaletteItem,
	t: (key: string) => string,
): string {
	return command.source === "builtin"
		? t(command.description)
		: (command.description ?? "");
}

function imageToDraftImage(image: AttachedImage): ChatDraftImage {
	return { data: image.data, mimeType: image.mimeType };
}

function draftImageToAttachedImage(image: ChatDraftImage): AttachedImage {
	return {
		...image,
		previewUrl: `data:${image.mimeType};base64,${image.data}`,
	};
}

function draftImagesToAttachedImages(
	images: ChatDraftImage[] | undefined,
): AttachedImage[] {
	return (images ?? [])
		.filter(isBase64ImageWithinLimits)
		.slice(0, MAX_ATTACHED_IMAGES)
		.map(draftImageToAttachedImage);
}

function revokeImagePreview(image: AttachedImage): void {
	if (image.previewUrl.startsWith("blob:")) {
		URL.revokeObjectURL(image.previewUrl);
	}
}

function QueuedMessageRow({
	kind,
	text,
}: {
	kind: "steer" | "follow-up";
	text: string;
}) {
	return (
		<div
			title={text}
			style={{
				display: "flex",
				alignItems: "center",
				gap: 8,
				padding: "3px 10px",
				fontSize: 12,
				color: "var(--text-muted)",
				minWidth: 0,
			}}
		>
			<span
				style={{
					flexShrink: 0,
					fontSize: 10,
					fontFamily: "var(--font-mono)",
					padding: "1px 7px",
					borderRadius: 999,
					border: `1px solid ${kind === "steer" ? "color-mix(in srgb, var(--accent) 45%, transparent)" : "var(--border)"}`,
					color: kind === "steer" ? "var(--accent)" : "var(--text-dim)",
				}}
			>
				{kind}
			</span>
			<span
				style={{
					minWidth: 0,
					overflow: "hidden",
					textOverflow: "ellipsis",
					whiteSpace: "nowrap",
				}}
			>
				{text}
			</span>
		</div>
	);
}

export function ModelErrorBanner({ error }: { error?: string | null }) {
	if (!error) return null;
	return (
		<div
			role="alert"
			style={{
				display: "flex",
				alignItems: "flex-start",
				gap: 8,
				maxHeight: 120,
				marginBottom: 8,
				padding: "7px 10px",
				overflowY: "auto",
				border: "1px solid rgba(239,68,68,0.3)",
				borderRadius: 6,
				background: "rgba(239,68,68,0.07)",
				color: "#ef4444",
				fontSize: 11,
				lineHeight: 1.45,
			}}
		>
			<svg
				width="13"
				height="13"
				viewBox="0 0 24 24"
				fill="none"
				stroke="currentColor"
				strokeWidth="2"
				strokeLinecap="round"
				strokeLinejoin="round"
				style={{ flexShrink: 0, marginTop: 1 }}
				aria-hidden="true"
			>
				<path d="M10.3 2.9 1.8 17a2 2 0 0 0 1.7 3h17a2 2 0 0 0 1.7-3L13.7 2.9a2 2 0 0 0-3.4 0Z" />
				<line x1="12" y1="9" x2="12" y2="13" />
				<line x1="12" y1="17" x2="12.01" y2="17" />
			</svg>
			<div style={{ minWidth: 0 }}>
				<div style={{ fontWeight: 600 }}>Model error</div>
				<div style={{ whiteSpace: "pre-wrap", overflowWrap: "anywhere" }}>
					{error}
				</div>
			</div>
		</div>
	);
}

export const ChatInput = forwardRef<ChatInputHandle, Props>(function ChatInput(
	{
		onSend,
		onAbort,
		onSteer,
		onFollowUp,
		isStreaming,
		model,
		isAutoModelSelection,
		modelNames,
		modelList,
		modelError,
		onModelChange,
		onCompact,
		onAbortCompaction,
		isCompacting,
		compactError,
		compactResult,
		toolPreset,
		onToolPresetChange,
		thinkingLevel,
		onThinkingLevelChange,
		availableThinkingLevels,
		thinkingLevelMap,
		retryInfo,
		queuedMessages,
		inputHistory = [],
		onRecallQueue,
		slashCommands,
		slashCommandsLoading,
		onLoadSlashCommands,
		onBuiltinCommand,
		soundEnabled,
		onSoundToggle,
		onAudioUnlock,
		onPromptWithStreamingBehavior,
		draftKey,
		cwd,
	}: Props,
	ref,
) {
	const { t } = useI18n();
	const isMobile = useIsMobile();
	const [value, setValue] = useState(() =>
		draftKey ? (getDraft(draftKey)?.value ?? "") : "",
	);
	const [modelDropdownOpen, setModelDropdownOpen] = useState(false);
	const [modelDropdownRect, setModelDropdownRect] = useState<{
		top: number;
		left: number;
		width: number;
	} | null>(null);
	const [modelFilter, setModelFilter] = useState("");
	// Codex fast mode toggle state; null = follow the model's configured serviceTier.
	const [fastModeOverride, setFastModeOverride] = useState<boolean | null>(
		null,
	);
	const [toolDropdownOpen, setToolDropdownOpen] = useState(false);
	const [thinkingDropdownOpen, setThinkingDropdownOpen] = useState(false);
	const [controlsMenuOpen, setControlsMenuOpen] = useState(false);
	const [attachedImages, setAttachedImages] = useState<AttachedImage[]>(() =>
		draftKey ? draftImagesToAttachedImages(getDraft(draftKey)?.images) : [],
	);
	const trimmedValue = value.trimStart();
	const bashMode = attachedImages.length === 0 && trimmedValue.startsWith("!");
	const bashExcluded = bashMode && trimmedValue.startsWith("!!");
	const [slashMenuOpen, setSlashMenuOpen] = useState(false);
	const [slashActiveIndex, setSlashActiveIndex] = useState(0);
	const [atQuery, setAtQuery] = useState<AtQueryMatch | null>(null);
	const [atMenuOpen, setAtMenuOpen] = useState(false);
	const [atActiveIndex, setAtActiveIndex] = useState(0);
	const [historyMenuOpen, setHistoryMenuOpen] = useState(false);
	const [historyActiveIndex, setHistoryActiveIndex] = useState(0);
	const [fileIndex, setFileIndex] = useState<{
		cwd: string;
		entries: FileIndexEntry[];
		truncated: boolean;
	} | null>(null);
	const [fileIndexLoading, setFileIndexLoading] = useState(false);
	const [atServerResult, setAtServerResult] = useState<{
		cwd: string;
		query: string;
		matches: FileIndexEntry[];
	} | null>(null);

	const textareaRef = useRef<HTMLTextAreaElement>(null);
	const dropdownRef = useRef<HTMLDivElement>(null);
	const modelDropdownPanelRef = useRef<HTMLDivElement>(null);
	const toolDropdownRef = useRef<HTMLDivElement>(null);
	const thinkingDropdownRef = useRef<HTMLDivElement>(null);
	const controlsMenuRef = useRef<HTMLDivElement>(null);
	const historyMenuRef = useRef<HTMLDivElement>(null);
	const fileInputRef = useRef<HTMLInputElement>(null);
	const isComposingRef = useRef(false);
	const lastCompositionEndAtRef = useRef(0);
	const slashCommandsRequestedRef = useRef(false);
	const slashItemRefs = useRef<Array<HTMLButtonElement | null>>([]);
	const atItemRefs = useRef<Array<HTMLButtonElement | null>>([]);
	const historyItemRefs = useRef<Array<HTMLButtonElement | null>>([]);
	const fileIndexMetaRef = useRef<{ cwd: string; fetchedAt: number } | null>(
		null,
	);
	const fileIndexFetchingRef = useRef<string | null>(null);
	const draftKeyRef = useRef(draftKey);
	const valueRef = useRef(value);
	const attachedImagesRef = useRef(attachedImages);
	const pendingImageCountRef = useRef(0);
	valueRef.current = value;
	attachedImagesRef.current = attachedImages;

	useImperativeHandle(ref, () => ({
		insertIfEmpty(text: string) {
			const ta = textareaRef.current;
			const current = ta ? ta.value : value;
			if (current.trim()) return;
			setValue(text);
			setAtQuery(null);
			requestAnimationFrame(() => {
				if (!ta) return;
				ta.focus();
				ta.style.height = "auto";
				ta.style.height = `${Math.min(ta.scrollHeight, 200)}px`;
			});
		},
		prependText(text: string) {
			if (!text.trim()) return;
			const ta = textareaRef.current;
			const current = ta ? ta.value : value;
			// Mirrors the TUI's queue restore: queued text first, then whatever
			// the user already typed, separated by a blank line.
			const combined = [text, current].filter((t) => t.trim()).join("\n\n");
			setValue(combined);
			setAtQuery(null);
			requestAnimationFrame(() => {
				if (!ta) return;
				ta.focus();
				ta.setSelectionRange(combined.length, combined.length);
				ta.style.height = "auto";
				ta.style.height = `${Math.min(ta.scrollHeight, 200)}px`;
			});
		},
		insertText(text: string) {
			const ta = textareaRef.current;
			if (!ta) {
				setValue((v) => v + (v ? " " : "") + text);
				return;
			}
			const start = ta.selectionStart ?? ta.value.length;
			const end = ta.selectionEnd ?? ta.value.length;
			const before = ta.value.slice(0, start);
			const after = ta.value.slice(end);
			const sep = before.length > 0 && !before.endsWith(" ") ? " " : "";
			const newVal = before + sep + text + after;
			setValue(newVal);
			setAtQuery(null);
			requestAnimationFrame(() => {
				if (!ta) return;
				const pos = start + sep.length + text.length;
				ta.setSelectionRange(pos, pos);
				ta.focus();
				ta.style.height = "auto";
				ta.style.height = `${Math.min(ta.scrollHeight, 200)}px`;
			});
		},
		addImages(files: File[]) {
			processImageFiles(files);
		},
	}));

	const processImageFiles = useCallback(
		async (files: File[]) => {
			if (isStreaming) return;
			const remaining = Math.max(
				0,
				MAX_ATTACHED_IMAGES -
					attachedImagesRef.current.length -
					pendingImageCountRef.current,
			);
			const imageFiles = files
				.filter(
					(f) =>
						f.type.startsWith("image/") && f.size <= MAX_ATTACHED_IMAGE_BYTES,
				)
				.slice(0, remaining);
			if (!imageFiles.length) return;
			pendingImageCountRef.current += imageFiles.length;
			try {
				const newImages = await Promise.all(
					imageFiles.map(async (file) => {
						// 大 JPEG 先压缩（长边 1600/q0.85），会话不再内嵌数 MB base64，加载/传输/转录都更快
						const compressed = await compressImageFile(file);
						const base64 = await new Promise<string>((resolve, reject) => {
							const reader = new FileReader();
							reader.onload = () =>
								resolve((reader.result as string).split(",")[1]);
							reader.onerror = reject;
							reader.readAsDataURL(compressed);
						});
						return {
							data: base64,
							mimeType: compressed.type,
							previewUrl: URL.createObjectURL(compressed),
						};
					}),
				);
				setAttachedImages((prev) => {
					const accepted = newImages.slice(
						0,
						Math.max(0, MAX_ATTACHED_IMAGES - prev.length),
					);
					newImages.slice(accepted.length).forEach(revokeImagePreview);
					return [...prev, ...accepted];
				});
			} finally {
				pendingImageCountRef.current -= imageFiles.length;
			}
		},
		[isStreaming],
	);

	const removeImage = useCallback((index: number) => {
		setAttachedImages((prev) => {
			const next = [...prev];
			const [removed] = next.splice(index, 1);
			if (removed) revokeImagePreview(removed);
			return next;
		});
	}, []);

	const clearImages = useCallback(() => {
		setAttachedImages((prev) => {
			prev.forEach(revokeImagePreview);
			return [];
		});
	}, []);

	const clearInput = useCallback(() => {
		setValue("");
		setAtQuery(null);
		setHistoryMenuOpen(false);
		if (draftKey) clearDraft(draftKey);
		if (draftKeyRef.current && draftKeyRef.current !== draftKey)
			clearDraft(draftKeyRef.current);
		clearImages();
		if (textareaRef.current) {
			textareaRef.current.style.height = "auto";
		}
	}, [clearImages, draftKey]);

	useEffect(() => {
		if (!draftKey || draftKeyRef.current !== draftKey) return;
		setDraft(draftKey, {
			value,
			images: attachedImages.map(imageToDraftImage),
		});
	}, [attachedImages, draftKey, value]);

	useEffect(() => {
		const previousDraftKey = draftKeyRef.current;
		if (previousDraftKey === draftKey) return;

		if (previousDraftKey) {
			setDraft(previousDraftKey, {
				value: valueRef.current,
				images: attachedImagesRef.current.map(imageToDraftImage),
			});
		}

		const draft = draftKey ? getDraft(draftKey) : null;
		draftKeyRef.current = draftKey;
		setValue(draft?.value ?? "");
		setAtQuery(null);
		setHistoryMenuOpen(false);
		setAttachedImages((prev) => {
			prev.forEach(revokeImagePreview);
			return draftImagesToAttachedImages(draft?.images);
		});
	}, [draftKey]);

	useEffect(() => {
		const ta = textareaRef.current;
		if (!ta) return;
		ta.style.height = "auto";
		if (value) ta.style.height = `${Math.min(ta.scrollHeight, 200)}px`;
	}, [value]);

	useEffect(() => {
		return () => {
			attachedImagesRef.current.forEach(revokeImagePreview);
		};
	}, []);

	const handleSend = useCallback(async () => {
		const msg = value.trim();
		if (!msg && !attachedImages.length) return;
		if (isStreaming) return;
		onAudioUnlock?.();
		if (!attachedImages.length && msg.startsWith("/") && onBuiltinCommand) {
			const result = await onBuiltinCommand(msg);
			if (result.handled) {
				if (!result.error) clearInput();
				return;
			}
		}
		onSend(msg, attachedImages.length ? attachedImages : undefined);
		clearInput();
	}, [
		value,
		attachedImages,
		isStreaming,
		onBuiltinCommand,
		onSend,
		clearInput,
		onAudioUnlock,
	]);

	const slashQuery =
		value.startsWith("/") && !/\s/.test(value.slice(1))
			? value.slice(1).toLowerCase()
			: null;

	const filteredSlashCommands = (() => {
		if (slashQuery === null) return [];
		const commands = [
			...(isStreaming ? [] : BUILTIN_SLASH_COMMANDS),
			...(slashCommands ?? []),
		];
		return [...commands]
			.filter((command) => {
				const name = command.name.toLowerCase();
				const description = getSlashDescription(command, t).toLowerCase();
				return name.includes(slashQuery) || description.includes(slashQuery);
			})
			.sort((a, b) => {
				const rankDelta =
					slashMatchRank(a, slashQuery, t) - slashMatchRank(b, slashQuery, t);
				if (rankDelta !== 0) return rankDelta;
				return (
					SLASH_SOURCE_ORDER[a.source] - SLASH_SOURCE_ORDER[b.source] ||
					MODEL_OPTION_COLLATOR.compare(a.name, b.name)
				);
			});
	})();

	const groupedSlashCommands = (() => {
		const groups = new Map<
			SlashCommandSource,
			{
				source: SlashCommandSource;
				items: { command: SlashCommandPaletteItem; index: number }[];
			}
		>();
		for (const source of SLASH_SOURCES) {
			groups.set(source, { source, items: [] });
		}
		filteredSlashCommands.forEach((command, index) => {
			groups.get(command.source)?.items.push({ command, index });
		});
		return SLASH_SOURCES.map((source) => groups.get(source)!).filter(
			(group) => group.items.length > 0,
		);
	})();

	const slashCommandCountLabel =
		filteredSlashCommands.length === 1
			? t(slashQuery ? "chat.match" : "chat.command")
			: t(slashQuery ? "chat.matches" : "chat.commands", {
					count: filteredSlashCommands.length,
				});
	const hasInputText = Boolean(value.trim());
	const canQueueStreamingMessage = hasInputText && attachedImages.length === 0;

	// ── @ file autocomplete ──────────────────────────────────────────────────
	// Recomputed from the text before the caret on every change/caret move.
	// Disabled entirely when there is no cwd (new session without a directory).
	const updateAtQuery = useCallback(
		(text: string, cursor: number | null) => {
			if (!cwd) {
				setAtQuery(null);
				return;
			}
			const pos = cursor ?? text.length;
			setAtQuery(extractAtQuery(text.slice(0, pos)));
		},
		[cwd],
	);

	const atQueryText = atQuery?.query ?? null;
	const atLocalMatches: FileIndexEntry[] = React.useMemo(
		() =>
			atQueryText !== null && fileIndex && fileIndex.cwd === cwd
				? filterFileEntries(fileIndex.entries, atQueryText)
				: [],
		[atQueryText, fileIndex, cwd],
	);

	// When the client index is truncated (repo larger than the index cap),
	// local filtering cannot see deep files, so queries are also ranked
	// server-side against the full listing. Local matches render immediately
	// and are replaced when the (debounced) server result for the current
	// query arrives; stale responses are ignored via the query/cwd tag.
	const needsServerSearch = Boolean(
		atQueryText && fileIndex?.truncated && fileIndex.cwd === cwd,
	);
	useEffect(() => {
		if (!needsServerSearch || !cwd || !atQueryText) return;
		const fetchCwd = cwd;
		const query = atQueryText;
		const timer = setTimeout(() => {
			fetch(
				`/api/file-index?cwd=${encodeURIComponent(fetchCwd)}&q=${encodeURIComponent(query)}`,
			)
				.then((res) => {
					if (!res.ok) throw new Error(`file search failed: ${res.status}`);
					return res.json() as Promise<{ matches?: FileIndexEntry[] }>;
				})
				.then((data) =>
					setAtServerResult({
						cwd: fetchCwd,
						query,
						matches: data.matches ?? [],
					}),
				)
				.catch(() => {
					// Keep showing local matches; the next keystroke retries.
				});
		}, 150);
		return () => clearTimeout(timer);
	}, [needsServerSearch, atQueryText, cwd]);

	const serverResultInUse =
		needsServerSearch &&
		atServerResult !== null &&
		atServerResult.cwd === cwd &&
		atServerResult.query === atQueryText;
	const atMatches: FileIndexEntry[] = serverResultInUse
		? atServerResult.matches
		: atLocalMatches;

	// Open/reset the menu whenever the @token appears or changes (mirrors the
	// slash menu: Escape closes it, the next keystroke re-opens it).
	const atTokenKey =
		atQuery === null
			? null
			: `${atQuery.start}:${atQuery.quoted ? 1 : 0}:${atQuery.query}`;
	useEffect(() => {
		if (atTokenKey === null) {
			setAtMenuOpen(false);
			setAtActiveIndex(0);
			return;
		}
		setAtMenuOpen(true);
		setAtActiveIndex(0);
	}, [atTokenKey]);

	// Fetch the file index when the menu opens. The server caches per cwd for
	// ~10s, so re-opening refreshes cheaply; while typing nothing refetches.
	const atTokenActive = atQuery !== null;
	useEffect(() => {
		if (!atTokenActive || !cwd) return;
		const meta = fileIndexMetaRef.current;
		if (meta && meta.cwd === cwd && Date.now() - meta.fetchedAt < 10_000)
			return;
		if (fileIndexFetchingRef.current === cwd) return;
		fileIndexFetchingRef.current = cwd;
		const fetchCwd = cwd;
		setFileIndexLoading(true);
		fetch(`/api/file-index?cwd=${encodeURIComponent(fetchCwd)}`)
			.then((res) => {
				if (!res.ok) throw new Error(`file index failed: ${res.status}`);
				return res.json() as Promise<{ files?: string[]; truncated?: boolean }>;
			})
			.then((data) => {
				setFileIndex({
					cwd: fetchCwd,
					entries: buildEntriesFromFiles(data.files ?? []),
					truncated: !!data.truncated,
				});
				fileIndexMetaRef.current = { cwd: fetchCwd, fetchedAt: Date.now() };
			})
			.catch(() => {
				// Leave any previous index in place; next open retries.
				fileIndexMetaRef.current = null;
			})
			.finally(() => {
				fileIndexFetchingRef.current = null;
				setFileIndexLoading(false);
			});
	}, [atTokenActive, cwd]);

	const applyAtCompletion = useCallback(
		(entry: FileIndexEntry) => {
			if (!atQuery) return;
			const ta = textareaRef.current;
			const cursor = ta?.selectionStart ?? value.length;
			const before = value.slice(0, atQuery.start);
			let after = value.slice(cursor);
			// Completing inside a quoted token (@"my dir/… with the caret before the
			// closing quote): the replacement carries its own closing quote, so drop
			// the old one right after the caret (mirrors the TUI's applyCompletion).
			if (atQuery.quoted && after.startsWith('"')) {
				after = after.slice(1);
			}
			const insert = buildAtInsertText(entry.path, entry.isDir, atQuery.quoted);
			const newValue = before + insert.text + after;
			const newPos = before.length + insert.cursorOffset;
			setValue(newValue);
			// setValue alone does not fire onChange — re-derive the token here. Files
			// end with a space (token closes, menu hides); directories end with "/"
			// before the caret (token stays open for drill-down into the directory).
			setAtQuery(extractAtQuery(newValue.slice(0, newPos)));
			requestAnimationFrame(() => {
				const el = textareaRef.current;
				if (!el) return;
				el.focus();
				el.setSelectionRange(newPos, newPos);
				el.style.height = "auto";
				el.style.height = `${Math.min(el.scrollHeight, 200)}px`;
			});
		},
		[atQuery, value],
	);

	useEffect(() => {
		if (atActiveIndex >= atMatches.length) {
			setAtActiveIndex(Math.max(0, atMatches.length - 1));
		}
	}, [atMatches.length, atActiveIndex]);

	useEffect(() => {
		atItemRefs.current.length = atMatches.length;
	}, [atMatches.length]);

	useEffect(() => {
		if (!atMenuOpen) return;
		atItemRefs.current[atActiveIndex]?.scrollIntoView({
			block: "nearest",
			inline: "nearest",
		});
	}, [atActiveIndex, atMenuOpen]);

	useEffect(() => {
		if (historyActiveIndex >= inputHistory.length) {
			setHistoryActiveIndex(Math.max(0, inputHistory.length - 1));
		}
	}, [inputHistory.length, historyActiveIndex]);

	useEffect(() => {
		historyItemRefs.current.length = inputHistory.length;
	}, [inputHistory.length]);

	useEffect(() => {
		if (!historyMenuOpen) return;
		historyItemRefs.current[historyActiveIndex]?.scrollIntoView({
			block: "nearest",
			inline: "nearest",
		});
	}, [historyActiveIndex, historyMenuOpen]);

	const applyHistoryInput = useCallback((text: string) => {
		setValue(text);
		setHistoryMenuOpen(false);
		setHistoryActiveIndex(0);
		setAtQuery(null);
		requestAnimationFrame(() => {
			const ta = textareaRef.current;
			if (!ta) return;
			ta.focus();
			ta.setSelectionRange(text.length, text.length);
			ta.style.height = "auto";
			ta.style.height = `${Math.min(ta.scrollHeight, 200)}px`;
		});
	}, []);

	const applySlashCommand = useCallback((command: SlashCommandPaletteItem) => {
		const nextValue = `/${command.name} `;
		setValue(nextValue);
		setSlashMenuOpen(false);
		setSlashActiveIndex(0);
		requestAnimationFrame(() => {
			const ta = textareaRef.current;
			if (!ta) return;
			ta.focus();
			ta.setSelectionRange(nextValue.length, nextValue.length);
			ta.style.height = "auto";
			ta.style.height = `${Math.min(ta.scrollHeight, 200)}px`;
		});
	}, []);

	const sendQueued = useCallback(
		(mode: "steer" | "followup") => {
			const msg = value.trim();
			if (!msg && !attachedImages.length) return;
			if (attachedImages.length) return;
			onAudioUnlock?.();
			const streamingBehavior = mode === "steer" ? "steer" : "followUp";
			if (msg.startsWith("/") && onPromptWithStreamingBehavior) {
				onPromptWithStreamingBehavior(
					msg,
					streamingBehavior,
					attachedImages.length ? attachedImages : undefined,
				);
				clearInput();
				return;
			}
			if (mode === "steer" && onSteer) {
				onSteer(msg, attachedImages.length ? attachedImages : undefined);
			} else if (mode === "followup" && onFollowUp) {
				onFollowUp(msg, attachedImages.length ? attachedImages : undefined);
			}
			clearInput();
		},
		[
			value,
			attachedImages,
			onPromptWithStreamingBehavior,
			onSteer,
			onFollowUp,
			clearInput,
			onAudioUnlock,
		],
	);

	const getNextSlashIndex = useCallback(
		(direction: "up" | "down" | "left" | "right") => {
			const lastIndex = filteredSlashCommands.length - 1;
			if (lastIndex < 0) return 0;

			if (direction === "left") return Math.max(0, slashActiveIndex - 1);
			if (direction === "right")
				return Math.min(lastIndex, slashActiveIndex + 1);

			const currentNode = slashItemRefs.current[slashActiveIndex];
			if (!currentNode) {
				return direction === "down"
					? Math.min(lastIndex, slashActiveIndex + 1)
					: Math.max(0, slashActiveIndex - 1);
			}

			const currentRect = currentNode.getBoundingClientRect();
			const currentX = currentRect.left + currentRect.width / 2;
			const currentY = currentRect.top + currentRect.height / 2;
			let bestIndex = -1;
			let bestScore = Number.POSITIVE_INFINITY;

			for (let index = 0; index <= lastIndex; index += 1) {
				if (index === slashActiveIndex) continue;
				const node = slashItemRefs.current[index];
				if (!node) continue;
				const rect = node.getBoundingClientRect();
				const candidateY = rect.top + rect.height / 2;
				const verticalDelta = candidateY - currentY;
				if (direction === "down" ? verticalDelta <= 4 : verticalDelta >= -4)
					continue;

				const candidateX = rect.left + rect.width / 2;
				const score =
					Math.abs(verticalDelta) * 1000 + Math.abs(candidateX - currentX);
				if (score < bestScore) {
					bestIndex = index;
					bestScore = score;
				}
			}

			if (bestIndex >= 0) return bestIndex;
			return direction === "down"
				? Math.min(lastIndex, slashActiveIndex + 1)
				: Math.max(0, slashActiveIndex - 1);
		},
		[filteredSlashCommands.length, slashActiveIndex],
	);

	const handleKeyDown = useCallback(
		(e: KeyboardEvent<HTMLTextAreaElement>) => {
			const nativeEvent = e.nativeEvent;
			const recentlyComposed =
				Date.now() - lastCompositionEndAtRef.current <
				COMPOSITION_END_ENTER_GRACE_MS;
			const isComposing =
				isComposingRef.current ||
				nativeEvent.isComposing ||
				nativeEvent.keyCode === 229;

			if (
				e.key === "Enter" &&
				!e.shiftKey &&
				(isComposing || recentlyComposed)
			) {
				if (recentlyComposed) e.preventDefault();
				return;
			}

			if (historyMenuOpen && !isComposing) {
				if (e.key === "ArrowDown") {
					e.preventDefault();
					setHistoryActiveIndex((i) =>
						Math.min(Math.max(0, inputHistory.length - 1), i + 1),
					);
					return;
				}
				if (e.key === "ArrowUp") {
					e.preventDefault();
					setHistoryActiveIndex((i) => Math.max(0, i - 1));
					return;
				}
				if (e.key === "Escape") {
					e.preventDefault();
					setHistoryMenuOpen(false);
					return;
				}
				if (
					(e.key === "Tab" || (e.key === "Enter" && !e.shiftKey)) &&
					inputHistory[historyActiveIndex]
				) {
					e.preventDefault();
					applyHistoryInput(inputHistory[historyActiveIndex]);
					return;
				}
			}

			if (slashMenuOpen && slashQuery !== null) {
				if (e.key === "ArrowDown") {
					e.preventDefault();
					setSlashActiveIndex(getNextSlashIndex("down"));
					return;
				}
				if (e.key === "ArrowUp") {
					e.preventDefault();
					setSlashActiveIndex(getNextSlashIndex("up"));
					return;
				}
				if (e.key === "ArrowRight") {
					e.preventDefault();
					setSlashActiveIndex(getNextSlashIndex("right"));
					return;
				}
				if (e.key === "ArrowLeft") {
					e.preventDefault();
					setSlashActiveIndex(getNextSlashIndex("left"));
					return;
				}
				if (e.key === "Escape") {
					e.preventDefault();
					setSlashMenuOpen(false);
					return;
				}
				if (
					(e.key === "Tab" || (e.key === "Enter" && !e.shiftKey)) &&
					filteredSlashCommands[slashActiveIndex]
				) {
					e.preventDefault();
					applySlashCommand(filteredSlashCommands[slashActiveIndex]);
					return;
				}
			}

			// @ file menu — skip while composing so IME candidate navigation
			// (arrows/Enter/Tab) is never intercepted.
			if (atMenuOpen && atQuery !== null && !isComposing) {
				if (e.key === "ArrowDown") {
					e.preventDefault();
					setAtActiveIndex((i) =>
						Math.min(Math.max(0, atMatches.length - 1), i + 1),
					);
					return;
				}
				if (e.key === "ArrowUp") {
					e.preventDefault();
					setAtActiveIndex((i) => Math.max(0, i - 1));
					return;
				}
				if (e.key === "Escape") {
					e.preventDefault();
					setAtMenuOpen(false);
					return;
				}
				if (
					(e.key === "Tab" || (e.key === "Enter" && !e.shiftKey)) &&
					atMatches[atActiveIndex]
				) {
					e.preventDefault();
					applyAtCompletion(atMatches[atActiveIndex]);
					return;
				}
			}

			if (
				e.key === "ArrowUp" &&
				!isComposing &&
				!isStreaming &&
				inputHistory.length > 0 &&
				value.trim().length === 0
			) {
				e.preventDefault();
				setSlashMenuOpen(false);
				setAtMenuOpen(false);
				setHistoryActiveIndex(inputHistory.length - 1);
				setHistoryMenuOpen(true);
				return;
			}

			// Esc stops the agent when no slash/@/history menu or IME composition is active.
			if (e.key === "Escape" && !isComposing && isStreaming && onAbort) {
				e.preventDefault();
				onAbort();
				return;
			}

			if (e.key === "Enter" && !e.shiftKey) {
				e.preventDefault();
				if (isStreaming && (onSteer || onFollowUp)) {
					// Default Enter sends as steer if available, else followup
					sendQueued(onSteer ? "steer" : "followup");
				} else {
					handleSend();
				}
			}
		},
		[
			isStreaming,
			onSteer,
			onFollowUp,
			onAbort,
			slashMenuOpen,
			slashQuery,
			filteredSlashCommands,
			slashActiveIndex,
			applySlashCommand,
			sendQueued,
			handleSend,
			getNextSlashIndex,
			atMenuOpen,
			atQuery,
			atMatches,
			atActiveIndex,
			applyAtCompletion,
			historyMenuOpen,
			inputHistory,
			historyActiveIndex,
			applyHistoryInput,
			value,
		],
	);

	const handleInput = useCallback(() => {
		const ta = textareaRef.current;
		if (!ta) return;
		ta.style.height = "auto";
		ta.style.height = `${Math.min(ta.scrollHeight, 200)}px`;
	}, []);

	const handlePaste = useCallback(
		(e: React.ClipboardEvent) => {
			const items = Array.from(e.clipboardData?.items ?? []);
			const imageItems = items.filter((item) => item.type.startsWith("image/"));
			if (!imageItems.length) return;
			e.preventDefault();
			const files = imageItems
				.map((item) => item.getAsFile())
				.filter((f): f is File => f !== null);
			processImageFiles(files);
		},
		[processImageFiles],
	);

	useEffect(() => {
		if (slashQuery === null) {
			setSlashMenuOpen(false);
			setSlashActiveIndex(0);
			slashCommandsRequestedRef.current = false;
			return;
		}
		setSlashMenuOpen(true);
		setSlashActiveIndex(0);
		if (!slashCommandsRequestedRef.current && onLoadSlashCommands) {
			slashCommandsRequestedRef.current = true;
			Promise.resolve(onLoadSlashCommands()).catch(() => {
				slashCommandsRequestedRef.current = false;
			});
		}
	}, [slashQuery, onLoadSlashCommands]);

	useEffect(() => {
		if (slashActiveIndex >= filteredSlashCommands.length) {
			setSlashActiveIndex(Math.max(0, filteredSlashCommands.length - 1));
		}
	}, [filteredSlashCommands.length, slashActiveIndex]);

	useEffect(() => {
		slashItemRefs.current.length = filteredSlashCommands.length;
	}, [filteredSlashCommands.length]);

	useEffect(() => {
		if (!slashMenuOpen) return;
		slashItemRefs.current[slashActiveIndex]?.scrollIntoView({
			block: "nearest",
			inline: "nearest",
		});
	}, [slashActiveIndex, slashMenuOpen]);

	// Build model options: prefer modelList (has provider info), fallback to modelNames
	const modelOptions: ModelOption[] = (() => {
		if (modelList && modelList.length > 0) {
			return modelList
				.map((m) => ({
					provider: m.provider,
					modelId: m.id,
					name: m.name,
					serviceTier: m.serviceTier,
				}))
				.sort(compareModelOptions);
		}
		return Object.entries(modelNames ?? {})
			.map(([modelId, name]) => ({
				provider: model?.provider ?? "unknown",
				modelId,
				name,
			}))
			.sort(compareModelOptions);
	})();
	const filteredModelOptions = filterModelOptions(modelOptions, modelFilter);
	const showModelFilter = modelOptions.length > MODEL_FILTER_THRESHOLD;

	// Group options by provider, preserving insertion order
	const modelsByProvider: { provider: string; options: ModelOption[] }[] = [];
	for (const opt of filteredModelOptions) {
		const group = modelsByProvider.find((g) => g.provider === opt.provider);
		if (group) group.options.push(opt);
		else modelsByProvider.push({ provider: opt.provider, options: [opt] });
	}

	const displayModelName = model
		? (modelOptions.find(
				(o) => o.modelId === model.modelId && o.provider === model.provider,
			)?.name ?? model.modelId)
		: null;
	const currentName = displayModelName;

	const compactSavedTokens = compactResult
		? Math.max(
				0,
				compactResult.tokensBefore - compactResult.estimatedTokensAfter,
			)
		: 0;
	const compactResultText = compactResult
		? `${compactResult.reason && compactResult.reason !== "manual" ? `${compactResult.reason[0].toUpperCase()}${compactResult.reason.slice(1)} ` : t("chat.compacted")} ${formatTokenCount(compactResult.tokensBefore)} -> ${formatTokenCount(compactResult.estimatedTokensAfter)} tokens (${t("chat.tokensSaved", { saved: formatTokenCount(compactSavedTokens) })})`
		: null;
	const thinkingDisplayLabel = (() => {
		const lvl = thinkingLevel ?? "auto";
		if (lvl === "auto" || !thinkingLevelMap) return lvl;
		return thinkingLevelMap[lvl] ?? lvl;
	})();
	const toolPresetLabel =
		Object.entries(TOOL_PRESET_MAP).find(
			([, v]) => v === (toolPreset ?? "default"),
		)?.[0] ?? "default";

	// Codex fast mode: derived from the selected model's configured serviceTier,
	// unless the user has flipped the toggle this session (fastModeOverride).
	const currentModelOption = model
		? modelOptions.find(
				(o) => o.provider === model.provider && o.modelId === model.modelId,
			)
		: undefined;
	const fastModeActive =
		fastModeOverride ?? currentModelOption?.serviceTier === "priority";
	const showFastModeToggle =
		model?.provider === "openai-codex" && !!currentModelOption;

	// Reset the local override when the selected model changes.
	useEffect(() => {
		setFastModeOverride(null);
	}, [model?.provider, model?.modelId]);

	const toggleFastMode = useCallback(async () => {
		if (!model || !onModelChange) return;
		const next = !fastModeActive;
		setFastModeOverride(next);
		try {
			const res = await fetch("/api/models-config");
			if (!res.ok) throw new Error(`HTTP ${res.status}`);
			const cfg = (await res.json()) as {
				providers?: Record<string, Record<string, unknown>>;
			};
			const providers = cfg.providers ?? {};
			const codex = providers["openai-codex"] ?? {};
			const overrides = (codex.modelOverrides ?? {}) as Record<
				string,
				Record<string, unknown>
			>;
			const modelOverride = { ...(overrides[model.modelId] ?? {}) };
			if (next) modelOverride.serviceTier = "priority";
			else delete modelOverride.serviceTier;
			if (Object.keys(modelOverride).length === 0)
				delete overrides[model.modelId];
			else overrides[model.modelId] = modelOverride;
			codex.modelOverrides = overrides;
			providers["openai-codex"] = codex;
			const put = await fetch("/api/models-config", {
				method: "PUT",
				headers: { "Content-Type": "application/json" },
				body: JSON.stringify({ ...cfg, providers }),
			});
			if (!put.ok) throw new Error(`HTTP ${put.status}`);
			// Re-select the current model so the session re-resolves it with the new serviceTier.
			await onModelChange(model.provider, model.modelId);
		} catch (e) {
			setFastModeOverride(null);
			console.error("Failed to toggle fast mode:", e);
		}
	}, [fastModeActive, model, onModelChange]);

	// Close dropdowns on outside click
	useEffect(() => {
		const handler = (e: MouseEvent) => {
			if (
				dropdownRef.current &&
				!dropdownRef.current.contains(e.target as Node) &&
				modelDropdownPanelRef.current &&
				!modelDropdownPanelRef.current.contains(e.target as Node)
			) {
				setModelDropdownOpen(false);
				setModelFilter("");
			}
			if (
				toolDropdownRef.current &&
				!toolDropdownRef.current.contains(e.target as Node)
			) {
				setToolDropdownOpen(false);
			}
			if (
				thinkingDropdownRef.current &&
				!thinkingDropdownRef.current.contains(e.target as Node)
			) {
				setThinkingDropdownOpen(false);
			}
			if (
				controlsMenuRef.current &&
				!controlsMenuRef.current.contains(e.target as Node)
			) {
				setControlsMenuOpen(false);
			}
			if (
				historyMenuRef.current &&
				!historyMenuRef.current.contains(e.target as Node) &&
				!textareaRef.current?.contains(e.target as Node)
			) {
				setHistoryMenuOpen(false);
			}
		};
		document.addEventListener("mousedown", handler);
		return () => document.removeEventListener("mousedown", handler);
	}, []);

	useEffect(() => {
		if (!isMobile) setControlsMenuOpen(false);
	}, [isMobile]);

	return (
		<div
			style={{
				flexShrink: 0,
				background: "transparent",
				padding: "0 16px 8px",
				paddingRight: isMobile ? 16 : 52, // desktop: 16px base + 36px for ChatMinimap alignment
			}}
		>
			{/* Hidden file input */}
			<input
				ref={fileInputRef}
				type="file"
				accept="image/*"
				multiple
				disabled={isStreaming}
				style={{ display: "none" }}
				onChange={(e) => {
					const files = Array.from(e.target.files ?? []);
					processImageFiles(files);
					e.target.value = "";
				}}
			/>
			<div style={{ maxWidth: 820, margin: "0 auto" }}>
				<ModelErrorBanner error={modelError} />
				{/* Queued steering / follow-up messages (delivered by pi on upcoming turns) */}
				{(queuedMessages?.steering.length ?? 0) +
					(queuedMessages?.followUp.length ?? 0) >
					0 && (
					<div
						style={{
							marginBottom: 8,
							border: "1px solid var(--border)",
							borderRadius: 6,
							background: "var(--bg-panel)",
							padding: "5px 0",
						}}
					>
						<div
							style={{
								display: "flex",
								alignItems: "center",
								justifyContent: "space-between",
								gap: 8,
								padding: "2px 8px 4px 10px",
							}}
						>
							<span
								style={{
									fontSize: 10,
									fontFamily: "var(--font-mono)",
									color: "var(--text-dim)",
									textTransform: "uppercase",
									letterSpacing: 0.4,
								}}
							>
								{t("chat.queued", {
									count:
										(queuedMessages?.steering.length ?? 0) +
										(queuedMessages?.followUp.length ?? 0),
								})}
							</span>
							{onRecallQueue && (
								<button
									onClick={onRecallQueue}
									title={t("chat.recallTitle")}
									style={{
										display: "flex",
										alignItems: "center",
										gap: 6,
										padding: "4px 12px",
										fontSize: 12,
										color: "var(--text)",
										background: "transparent",
										border: "1px solid var(--border)",
										borderRadius: 7,
										cursor: "pointer",
										transition: "background 0.12s, border-color 0.12s",
										whiteSpace: "nowrap",
									}}
									onMouseEnter={(e) => {
										e.currentTarget.style.background = "var(--bg-hover)";
										e.currentTarget.style.borderColor =
											"color-mix(in srgb, var(--accent) 45%, var(--border))";
									}}
									onMouseLeave={(e) => {
										e.currentTarget.style.background = "transparent";
										e.currentTarget.style.borderColor = "var(--border)";
									}}
								>
									<svg
										width="13"
										height="13"
										viewBox="0 0 24 24"
										fill="none"
										stroke="currentColor"
										strokeWidth="2"
										strokeLinecap="round"
										strokeLinejoin="round"
									>
										<polyline points="9 14 4 9 9 4" />
										<path d="M20 20v-7a4 4 0 0 0-4-4H4" />
									</svg>
									{t("chat.recall")}
								</button>
							)}
						</div>
						{queuedMessages?.steering.map((text, i) => (
							<QueuedMessageRow key={`steer-${i}`} kind="steer" text={text} />
						))}
						{queuedMessages?.followUp.map((text, i) => (
							<QueuedMessageRow
								key={`followup-${i}`}
								kind="follow-up"
								text={text}
							/>
						))}
					</div>
				)}
				{/* Retry banner */}
				{retryInfo && (
					<div
						style={{
							marginBottom: 8,
							padding: "5px 10px",
							background: "rgba(234,179,8,0.08)",
							border: "1px solid rgba(234,179,8,0.25)",
							borderRadius: 6,
							fontSize: 12,
							color: "rgba(180,130,0,0.9)",
							display: "flex",
							alignItems: "center",
							gap: 6,
						}}
					>
						<svg
							width="11"
							height="11"
							viewBox="0 0 24 24"
							fill="none"
							stroke="currentColor"
							strokeWidth="2"
							strokeLinecap="round"
							strokeLinejoin="round"
							style={{ flexShrink: 0 }}
						>
							<path d="M3 12a9 9 0 1 0 9-9 9.75 9.75 0 0 0-6.74 2.74L3 8" />
							<path d="M3 3v5h5" />
						</svg>
						{t("chat.retrying", {
							attempt: retryInfo.attempt,
							max: retryInfo.maxAttempts,
						})}
						{retryInfo.errorMessage && (
							<span style={{ opacity: 0.7, marginLeft: 4 }}>
								— {retryInfo.errorMessage}
							</span>
						)}
					</div>
				)}
				{compactResultText && (
					<div
						style={{
							marginBottom: 8,
							padding: "5px 10px",
							background: "rgba(16,185,129,0.08)",
							border: "1px solid rgba(16,185,129,0.24)",
							borderRadius: 6,
							fontSize: 12,
							color: "rgba(5,150,105,0.95)",
							display: "flex",
							alignItems: "center",
							gap: 6,
						}}
					>
						<svg
							width="11"
							height="11"
							viewBox="0 0 24 24"
							fill="none"
							stroke="currentColor"
							strokeWidth="2"
							strokeLinecap="round"
							strokeLinejoin="round"
							style={{ flexShrink: 0 }}
						>
							<polyline points="20 6 9 17 4 12" />
						</svg>
						{compactResultText}
					</div>
				)}
				{compactError && (
					<div
						role="alert"
						style={{
							marginBottom: 8,
							padding: "7px 10px",
							background: "rgba(239,68,68,0.07)",
							border: "1px solid rgba(239,68,68,0.3)",
							borderRadius: 6,
							color: "#ef4444",
							fontFamily: "var(--font-mono)",
							fontSize: 12,
							lineHeight: 1.5,
							whiteSpace: "pre-wrap",
							overflowWrap: "anywhere",
						}}
					>
						{compactError}
					</div>
				)}
				{/* Image previews */}
				{attachedImages.length > 0 && (
					<div
						style={{
							display: "flex",
							gap: 6,
							marginBottom: 6,
							flexWrap: "wrap",
						}}
					>
						{attachedImages.map((img, i) => (
							<div key={i} style={{ position: "relative", flexShrink: 0 }}>
								{/* eslint-disable-next-line @next/next/no-img-element */}
								<img
									src={img.previewUrl}
									alt=""
									style={{
										width: 56,
										height: 56,
										objectFit: "cover",
										borderRadius: 6,
										border: "1px solid var(--border)",
										display: "block",
									}}
								/>
								<button
									onClick={() => removeImage(i)}
									style={{
										position: "absolute",
										top: -4,
										right: -4,
										width: 16,
										height: 16,
										borderRadius: "50%",
										background: "var(--bg-panel)",
										border: "1px solid var(--border)",
										display: "flex",
										alignItems: "center",
										justifyContent: "center",
										cursor: "pointer",
										padding: 0,
										color: "var(--text-muted)",
									}}
								>
									<svg
										width="8"
										height="8"
										viewBox="0 0 8 8"
										fill="none"
										stroke="currentColor"
										strokeWidth="1.5"
										strokeLinecap="round"
									>
										<line x1="1" y1="1" x2="7" y2="7" />
										<line x1="7" y1="1" x2="1" y2="7" />
									</svg>
								</button>
							</div>
						))}
					</div>
				)}

				{/* Main input */}
				<div style={{ position: "relative" }}>
					{historyMenuOpen && inputHistory.length > 0 && (
						<div
							ref={historyMenuRef}
							style={{
								position: "absolute",
								left: 0,
								right: 0,
								bottom: "calc(100% + 8px)",
								zIndex: 120,
								background: "var(--bg)",
								border: "1px solid var(--border)",
								borderRadius: 8,
								boxShadow: "0 -6px 20px rgba(0,0,0,0.12)",
								overflow: "hidden",
								maxHeight: "min(44vh, 360px)",
							}}
						>
							<div
								title="Input history"
								style={{
									height: 30,
									padding: "0 10px",
									borderBottom: "1px solid var(--border)",
									display: "flex",
									alignItems: "center",
									color: "var(--text-dim)",
								}}
							>
								<svg
									width="14"
									height="14"
									viewBox="0 0 24 24"
									fill="none"
									stroke="currentColor"
									strokeWidth="1.8"
									strokeLinecap="round"
									strokeLinejoin="round"
									aria-hidden="true"
								>
									<path d="M3 12a9 9 0 1 0 3-6.7" />
									<path d="M3 4v5h5" />
									<path d="M12 7v5l3 2" />
								</svg>
							</div>
							<div
								style={{
									maxHeight: "calc(min(44vh, 360px) - 31px)",
									overflowY: "auto",
									padding: 4,
								}}
							>
								{inputHistory.map((item, index) => {
									const active = index === historyActiveIndex;
									return (
										<button
											key={`${index}:${item}`}
											ref={(node) => {
												historyItemRefs.current[index] = node;
											}}
											type="button"
											onMouseDown={(e) => {
												e.preventDefault();
												applyHistoryInput(item);
											}}
											onMouseEnter={() => setHistoryActiveIndex(index)}
											style={{
												width: "100%",
												display: "flex",
												alignItems: "flex-start",
												gap: 8,
												padding: "7px 8px",
												border: "none",
												borderRadius: 6,
												background: active ? "var(--bg-selected)" : "none",
												color: "var(--text)",
												cursor: "pointer",
												textAlign: "left",
												fontSize: 12.5,
												lineHeight: 1.45,
											}}
										>
											<span
												style={{
													flexShrink: 0,
													fontFamily: "var(--font-mono)",
													fontSize: 11,
													color: "var(--text-dim)",
													paddingTop: 1,
												}}
											>
												{index + 1}
											</span>
											<span
												style={{
													minWidth: 0,
													display: "-webkit-box",
													WebkitBoxOrient: "vertical",
													WebkitLineClamp: 2,
													overflow: "hidden",
													overflowWrap: "anywhere",
												}}
											>
												{item}
											</span>
										</button>
									);
								})}
							</div>
						</div>
					)}
					{slashMenuOpen && slashQuery !== null && (
						<div
							style={{
								position: "absolute",
								left: 0,
								right: 0,
								bottom: "calc(100% + 8px)",
								zIndex: 120,
								background: "var(--bg)",
								border: "1px solid var(--border)",
								borderRadius: 8,
								boxShadow: "0 -6px 20px rgba(0,0,0,0.12)",
								overflow: "hidden",
								maxHeight: "min(56vh, 460px)",
							}}
						>
							<div
								style={{
									padding: "8px 10px",
									borderBottom: "1px solid var(--border)",
									display: "flex",
									alignItems: "center",
									justifyContent: "space-between",
									gap: 8,
									fontSize: 11,
									color: "var(--text-dim)",
								}}
							>
								<span>
									{slashCommandsLoading
										? t("chat.loadingCommands")
										: t("chat.slashCommands", {
												label: slashCommandCountLabel,
											})}
								</span>
								<span style={{ fontFamily: "var(--font-mono)" }}>
									{t("chat.tabEnter")}
								</span>
							</div>
							<div
								style={{
									maxHeight: "calc(min(56vh, 460px) - 34px)",
									overflowY: "auto",
									padding: 10,
								}}
							>
								{!slashCommandsLoading && filteredSlashCommands.length === 0 ? (
									<div
										style={{
											padding: "2px 2px 4px",
											fontSize: 12,
											color: "var(--text-dim)",
										}}
									>
										{t("chat.noCommands")}
									</div>
								) : (
									groupedSlashCommands.map((group) => (
										<section key={group.source} style={{ marginBottom: 12 }}>
											<div
												style={{
													position: "sticky",
													top: -10,
													zIndex: 1,
													display: "flex",
													alignItems: "center",
													justifyContent: "space-between",
													gap: 8,
													padding: "4px 0 6px",
													background: "var(--bg)",
													color: "var(--text-dim)",
													fontSize: 10,
													fontWeight: 600,
													textTransform: "uppercase",
												}}
											>
												<span>
													{t(SLASH_SOURCE_GROUP_LABEL_KEYS[group.source])}
												</span>
												<span
													style={{
														fontFamily: "var(--font-mono)",
														fontWeight: 500,
													}}
												>
													{group.items.length}
												</span>
											</div>
											<div
												style={{
													display: "grid",
													gridTemplateColumns:
														"repeat(auto-fit, minmax(220px, 1fr))",
													gap: 8,
												}}
											>
												{group.items.map(({ command, index }) => {
													const active = index === slashActiveIndex;
													return (
														<button
															key={`${command.source}:${command.name}`}
															ref={(node) => {
																slashItemRefs.current[index] = node;
															}}
															type="button"
															onMouseDown={(e) => {
																e.preventDefault();
																applySlashCommand(command);
															}}
															onMouseEnter={() => setSlashActiveIndex(index)}
															style={{
																width: "100%",
																minWidth: 0,
																minHeight: 58,
																display: "flex",
																flexDirection: "column",
																gap: 4,
																justifyContent: "center",
																padding: "9px 10px",
																border: `1px solid ${active ? "var(--accent)" : "var(--border)"}`,
																borderRadius: 7,
																background: active
																	? "var(--bg-selected)"
																	: "var(--bg-panel)",
																color: "var(--text)",
																cursor: "pointer",
																textAlign: "left",
																boxShadow: active
																	? "0 0 0 1px color-mix(in srgb, var(--accent) 28%, transparent)"
																	: "none",
															}}
														>
															<span
																style={{
																	fontSize: 13,
																	fontFamily: "var(--font-mono)",
																	overflowWrap: "anywhere",
																	wordBreak: "break-word",
																}}
															>
																/{command.name}
															</span>
															{command.description && (
																<span
																	style={{
																		display: "-webkit-box",
																		WebkitBoxOrient: "vertical",
																		WebkitLineClamp: 2,
																		overflow: "hidden",
																		fontSize: 11,
																		lineHeight: 1.35,
																		color: "var(--text-dim)",
																	}}
																>
																	{getSlashDescription(command, t)}
																</span>
															)}
														</button>
													);
												})}
											</div>
										</section>
									))
								)}
							</div>
						</div>
					)}
					{atMenuOpen &&
						atQuery !== null &&
						(() => {
							const indexLoading =
								fileIndexLoading && (!fileIndex || fileIndex.cwd !== cwd);
							const matchCountLabel =
								atMatches.length === 1
									? t("chat.match")
									: t("chat.matches", { count: atMatches.length });
							// With a truncated index, local results are provisional — the
							// debounced server search over the full listing replaces them.
							const truncatedHint =
								fileIndex?.truncated && !serverResultInUse
									? atQuery.query
										? t("chat.searchingAll")
										: t("chat.indexTruncated")
									: "";
							return (
								<div
									style={{
										position: "absolute",
										left: 0,
										right: 0,
										bottom: "calc(100% + 8px)",
										zIndex: 120,
										background: "var(--bg)",
										border: "1px solid var(--border)",
										borderRadius: 8,
										boxShadow: "0 -6px 20px rgba(0,0,0,0.12)",
										overflow: "hidden",
										maxHeight: "min(48vh, 400px)",
									}}
								>
									<div
										style={{
											padding: "8px 10px",
											borderBottom: "1px solid var(--border)",
											display: "flex",
											alignItems: "center",
											justifyContent: "space-between",
											gap: 8,
											fontSize: 11,
											color: "var(--text-dim)",
										}}
									>
										<span>
											{indexLoading
												? t("chat.loadingFiles")
												: t("chat.files", {
														label: matchCountLabel,
														hint: truncatedHint,
													})}
										</span>
										<span style={{ fontFamily: "var(--font-mono)" }}>
											{t("chat.tabEnter")}
										</span>
									</div>
									<div
										style={{
											maxHeight: "calc(min(48vh, 400px) - 34px)",
											overflowY: "auto",
											padding: 4,
										}}
									>
										{!indexLoading && atMatches.length === 0 ? (
											<div
												style={{
													padding: "6px 8px",
													fontSize: 12,
													color: "var(--text-dim)",
												}}
											>
												{needsServerSearch && !serverResultInUse
													? t("chat.searching")
													: t("chat.noMatchingFiles")}
											</div>
										) : (
											atMatches.map((entry, index) => {
												const active = index === atActiveIndex;
												const name = entry.path.split("/").pop() ?? entry.path;
												const dirPrefix = entry.path.slice(
													0,
													entry.path.length - name.length,
												);
												return (
													<button
														key={`${entry.isDir ? "d" : "f"}:${entry.path}`}
														ref={(node) => {
															atItemRefs.current[index] = node;
														}}
														type="button"
														onMouseDown={(e) => {
															e.preventDefault();
															applyAtCompletion(entry);
														}}
														onMouseEnter={() => setAtActiveIndex(index)}
														style={{
															width: "100%",
															display: "flex",
															alignItems: "center",
															gap: 8,
															padding: "6px 8px",
															border: "none",
															borderRadius: 6,
															background: active
																? "var(--bg-selected)"
																: "none",
															color: "var(--text)",
															cursor: "pointer",
															textAlign: "left",
															fontSize: 12.5,
															fontFamily: "var(--font-mono)",
														}}
													>
														<span
															style={{
																flexShrink: 0,
																display: "flex",
																alignItems: "center",
															}}
														>
															{entry.isDir ? (
																<FolderIcon size={14} />
															) : (
																getFileIcon(name, 14)
															)}
														</span>
														<span
															style={{
																minWidth: 0,
																overflow: "hidden",
																textOverflow: "ellipsis",
																whiteSpace: "nowrap",
															}}
														>
															{dirPrefix && (
																<span style={{ color: "var(--text-dim)" }}>
																	{dirPrefix}
																</span>
															)}
															{name}
															{entry.isDir && (
																<span style={{ color: "var(--text-dim)" }}>
																	/
																</span>
															)}
														</span>
													</button>
												);
											})
										)}
									</div>
								</div>
							);
						})()}
					<div
						style={
							{
								display: "flex",
								gap: 8,
								alignItems: "center",
								background: "var(--bg)",
								border: `1px solid ${
									bashMode
										? "var(--tool-bg)"
										: isStreaming && (onSteer || onFollowUp)
											? "rgba(234,179,8,0.4)"
											: "color-mix(in srgb, var(--border) 70%, transparent)"
								}`,
								borderRadius: 14,
								padding: "10px 10px 10px 14px",
								boxShadow:
									"0 1px 2px rgba(15,23,42,0.04), 0 8px 24px -12px rgba(15,23,42,0.10)",
								transition:
									"border-color 0.15s, background 0.15s, box-shadow 0.15s",
							} as React.CSSProperties
						}
					>
						<textarea
							ref={textareaRef}
							value={value}
							onChange={(e) => {
								setValue(e.target.value);
								setHistoryMenuOpen(false);
								updateAtQuery(e.target.value, e.target.selectionStart);
							}}
							onSelect={(e) => {
								const el = e.currentTarget;
								updateAtQuery(el.value, el.selectionStart);
							}}
							onKeyDown={handleKeyDown}
							onCompositionStart={() => {
								isComposingRef.current = true;
							}}
							onCompositionEnd={(e) => {
								isComposingRef.current = false;
								lastCompositionEndAtRef.current = Date.now();
								const el = e.currentTarget;
								updateAtQuery(el.value, el.selectionStart);
							}}
							onInput={handleInput}
							onPaste={handlePaste}
							placeholder={
								isStreaming && (onSteer || onFollowUp)
									? t("chat.steerPlaceholder")
									: isStreaming
										? t("chat.agentPlaceholder")
										: t("chat.messagePlaceholder")
							}
							rows={1}
							style={{
								flex: 1,
								background: "none",
								border: "none",
								outline: "none",
								resize: "none",
								color: "var(--text)",
								fontSize: 14,
								lineHeight: 1.6,
								fontFamily: "inherit",
								minHeight: 24,
								maxHeight: 200,
								overflow: "auto",
							}}
						/>

						{isStreaming ? (
							<div
								style={{
									display: "flex",
									alignItems: "center",
									gap: 6,
									flexShrink: 0,
									alignSelf: "flex-end",
								}}
							>
								{onSteer && (
									<button
										onClick={() => sendQueued("steer")}
										disabled={!canQueueStreamingMessage}
										title={
											attachedImages.length
												? "Image attachments cannot be queued while the agent is running"
												: "Interrupt the current run and inject this message now"
										}
										style={{
											display: "flex",
											alignItems: "center",
											gap: 5,
											padding: "7px 12px",
											background: canQueueStreamingMessage
												? "rgba(234,179,8,0.12)"
												: "none",
											border: "1px solid rgba(234,179,8,0.35)",
											borderRadius: 8,
											color: canQueueStreamingMessage
												? "rgba(180,130,0,1)"
												: "var(--text-dim)",
											cursor: canQueueStreamingMessage
												? "pointer"
												: "not-allowed",
											fontSize: 13,
											fontWeight: 600,
											letterSpacing: "-0.01em",
											transition: "background 0.12s",
										}}
									>
										<svg
											width="12"
											height="12"
											viewBox="0 0 10 10"
											fill="none"
											stroke="currentColor"
											strokeWidth="1.8"
											strokeLinecap="round"
											strokeLinejoin="round"
										>
											<path d="M5 1 L9 5 L5 9" />
											<line x1="1" y1="5" x2="9" y2="5" />
										</svg>
										{t("chat.steer")}
									</button>
								)}
								{onFollowUp && (
									<button
										onClick={() => sendQueued("followup")}
										disabled={!canQueueStreamingMessage}
										title={
											attachedImages.length
												? "Image attachments cannot be queued while the agent is running"
												: "Queue this message after the agent finishes"
										}
										style={{
											display: "flex",
											alignItems: "center",
											gap: 5,
											padding: "7px 12px",
											background: canQueueStreamingMessage
												? "rgba(129,140,248,0.12)"
												: "none",
											border: "1px solid rgba(129,140,248,0.35)",
											borderRadius: 8,
											color: canQueueStreamingMessage
												? "rgba(99,102,241,1)"
												: "var(--text-dim)",
											cursor: canQueueStreamingMessage
												? "pointer"
												: "not-allowed",
											fontSize: 13,
											fontWeight: 600,
											letterSpacing: "-0.01em",
											transition: "background 0.12s",
										}}
									>
										<svg
											width="12"
											height="12"
											viewBox="0 0 10 10"
											fill="none"
											stroke="currentColor"
											strokeWidth="1.8"
											strokeLinecap="round"
											strokeLinejoin="round"
										>
											<line x1="5" y1="1" x2="5" y2="6" />
											<polyline points="2.5 3.5 5 1 7.5 3.5" />
											<line x1="2" y1="9" x2="8" y2="9" />
										</svg>
										{t("chat.followUp")}
									</button>
								)}
							</div>
						) : (
							<button
								onClick={handleSend}
								disabled={!value.trim() && !attachedImages.length}
								style={{
									flexShrink: 0,
									alignSelf: "flex-end",
									display: "flex",
									alignItems: "center",
									gap: 6,
									padding: "7px 14px",
									background:
										value.trim() || attachedImages.length
											? "var(--accent)"
											: "var(--bg-panel)",
									border: "none",
									borderRadius: 8,
									color:
										value.trim() || attachedImages.length
											? "#fff"
											: "var(--text-dim)",
									cursor:
										value.trim() || attachedImages.length
											? "pointer"
											: "not-allowed",
									fontSize: 13,
									fontWeight: 600,
									letterSpacing: "-0.01em",
									boxShadow:
										value.trim() || attachedImages.length
											? "0 1px 3px rgba(37,99,235,0.25)"
											: "none",
									transition: "background 0.15s, box-shadow 0.15s",
								}}
							>
								<svg
									width="14"
									height="14"
									viewBox="0 0 14 14"
									fill="none"
									stroke="currentColor"
									strokeWidth="2"
									strokeLinecap="round"
									strokeLinejoin="round"
								>
									<line x1="2" y1="7" x2="11" y2="7" />
									<polyline points="7.5 3 12 7 7.5 11" />
								</svg>
								{t("chat.send")}
							</button>
						)}
					</div>
				</div>

				{/* Bash mode status label */}
				{bashMode && (
					<div
						className="text-xs px-2 py-1"
						style={{
							color: bashExcluded ? "var(--text-muted)" : "var(--accent)",
							marginTop: 4,
						}}
					>
						{t("chat.shell")} ·{" "}
						{bashExcluded ? t("chat.outputLocal") : t("chat.outputModel")}
					</div>
				)}

				{/* Bottom bar: left | center (context) | right */}
				<div
					style={{
						marginTop: 8,
						display: isMobile ? "grid" : "flex",
						gridTemplateColumns: isMobile ? "minmax(0, 1fr) auto" : undefined,
						alignItems: "center",
						gap: 6,
					}}
				>
					{/* LEFT: attach + model selector (idle) or steer/followup toggle (streaming) */}
					<div
						style={{
							flex: isMobile ? "1 1 auto" : "0 0 auto",
							minWidth: 0,
							display: "flex",
							alignItems: "center",
							gap: 2,
						}}
					>
						<button
							onClick={() => fileInputRef.current?.click()}
							disabled={isStreaming}
							title={t("chat.attachImage")}
							style={{
								flexShrink: 0,
								display: "flex",
								alignItems: "center",
								justifyContent: "center",
								width: 32,
								height: 32,
								padding: 0,
								background: "none",
								border: "none",
								borderRadius: 9,
								color: attachedImages.length
									? "var(--accent)"
									: "var(--text-muted)",
								cursor: isStreaming ? "not-allowed" : "pointer",
								opacity: isStreaming ? 0.5 : 1,
								transition: "background 0.12s, color 0.12s",
							}}
							onMouseEnter={(e) => {
								if (isStreaming) return;
								e.currentTarget.style.background = "var(--bg-hover)";
								e.currentTarget.style.color = attachedImages.length
									? "var(--accent)"
									: "var(--text)";
							}}
							onMouseLeave={(e) => {
								e.currentTarget.style.background = "none";
								e.currentTarget.style.color = attachedImages.length
									? "var(--accent)"
									: "var(--text-muted)";
							}}
						>
							<svg
								width="15"
								height="15"
								viewBox="0 0 24 24"
								fill="none"
								stroke="currentColor"
								strokeWidth="1.8"
								strokeLinecap="round"
								strokeLinejoin="round"
							>
								<rect x="3" y="3" width="18" height="18" rx="2" ry="2" />
								<circle cx="8.5" cy="8.5" r="1.5" />
								<polyline points="21 15 16 10 5 21" />
							</svg>
						</button>
						{/* Model selector — visible always, disabled during streaming */}
						{(modelOptions.length > 0 || currentName || modelError) &&
							onModelChange && (
								<div
									ref={dropdownRef}
									style={{
										position: "relative",
										display: "flex",
										alignItems: "center",
										gap: 2,
										flex: isMobile ? "1 1 auto" : undefined,
										minWidth: 0,
									}}
								>
									<button
										onClick={(e) => {
											const rect = (
												e.currentTarget as HTMLElement
											).getBoundingClientRect();
											setModelDropdownRect({
												top: rect.top,
												left: rect.left,
												width: rect.width,
											});
											setModelDropdownOpen((open) => {
												if (open) setModelFilter("");
												return !open;
											});
										}}
										disabled={isStreaming}
										style={{
											display: "flex",
											alignItems: "center",
											gap: 6,
											justifyContent: isMobile ? "flex-start" : undefined,
											padding: isMobile ? "8px 10px" : "8px 12px",
											height: 32,
											width: isMobile ? "100%" : undefined,
											maxWidth: isMobile ? "100%" : 220,
											overflow: "hidden",
											background: modelDropdownOpen
												? "var(--bg-hover)"
												: "none",
											border: "none",
											borderRadius: 9,
											color: "var(--text-muted)",
											cursor: isStreaming ? "not-allowed" : "pointer",
											fontSize: 12,
											opacity: isStreaming ? 0.5 : 1,
											transition: "background 0.12s, color 0.12s",
										}}
										onMouseEnter={(e) => {
											if (isStreaming) return;
											e.currentTarget.style.background = "var(--bg-hover)";
											e.currentTarget.style.color = "var(--text)";
										}}
										onMouseLeave={(e) => {
											e.currentTarget.style.background = modelDropdownOpen
												? "var(--bg-hover)"
												: "none";
											e.currentTarget.style.color = "var(--text-muted)";
										}}
										title={
											modelOptions.length > 0
												? "Change model"
												: "No available models"
										}
									>
										<svg
											width="11"
											height="11"
											viewBox="0 0 24 24"
											fill="none"
											stroke="currentColor"
											strokeWidth="2"
											strokeLinecap="round"
											strokeLinejoin="round"
										>
											<rect x="4" y="4" width="16" height="16" rx="2" />
											<rect x="9" y="9" width="6" height="6" />
											<line x1="9" y1="1" x2="9" y2="4" />
											<line x1="15" y1="1" x2="15" y2="4" />
											<line x1="9" y1="20" x2="9" y2="23" />
											<line x1="15" y1="20" x2="15" y2="23" />
											<line x1="20" y1="9" x2="23" y2="9" />
											<line x1="20" y1="14" x2="23" y2="14" />
											<line x1="1" y1="9" x2="4" y2="9" />
											<line x1="1" y1="14" x2="4" y2="14" />
										</svg>
										<span
											style={{
												overflow: "hidden",
												textOverflow: "ellipsis",
												whiteSpace: "nowrap",
												minWidth: 0,
											}}
										>
											{currentName ??
												(modelOptions.length > 0
													? "Select model"
													: "No models")}
										</span>
									</button>
									{/* Codex fast mode toggle — shown for openai-codex models */}
									{showFastModeToggle && (
										<button
											type="button"
											aria-pressed={fastModeActive}
											title={
												fastModeActive
													? "Fast mode ON (service_tier: priority, ~2x credits)"
													: "Fast mode OFF (default tier) — click to enable"
											}
											onClick={toggleFastMode}
											disabled={isStreaming}
											style={{
												display: "flex",
												alignItems: "center",
												justifyContent: "center",
												width: 32,
												height: 32,
												flexShrink: 0,
												padding: 0,
												borderRadius: 9,
												border: "none",
												background: fastModeActive ? "var(--accent)" : "none",
												color: fastModeActive
													? "var(--bg)"
													: "var(--text-muted)",
												cursor: isStreaming ? "not-allowed" : "pointer",
												opacity: isStreaming ? 0.5 : 1,
												transition: "background 0.12s, color 0.12s",
											}}
											onMouseEnter={(e) => {
												if (isStreaming || fastModeActive) return;
												e.currentTarget.style.background = "var(--bg-hover)";
												e.currentTarget.style.color = "var(--text)";
											}}
											onMouseLeave={(e) => {
												if (fastModeActive) return;
												e.currentTarget.style.background = "none";
												e.currentTarget.style.color = "var(--text-muted)";
											}}
										>
											<svg
												width="15"
												height="15"
												viewBox="0 0 24 24"
												fill="none"
												stroke="currentColor"
												strokeWidth="2"
												strokeLinecap="round"
												strokeLinejoin="round"
											>
												<polygon points="13 2 3 14 12 14 11 22 21 10 12 10 13 2" />
											</svg>
										</button>
									)}
									{modelDropdownOpen &&
										modelDropdownRect &&
										(() => {
											const viewportHeight =
												window.visualViewport?.height ?? window.innerHeight;
											const bottom = viewportHeight - modelDropdownRect.top + 6;
											const maxH = Math.max(
												120,
												Math.min(
													modelDropdownRect.top - 8,
													viewportHeight * 0.6,
												),
											);
											// On mobile, pin to a small left margin and cap width to the
											// viewport so long model names never push the panel off-screen.
											const panelPos: React.CSSProperties = isMobile
												? { left: 8, right: 8, maxWidth: "calc(100vw - 16px)" }
												: {
														left: modelDropdownRect.left,
														width: "max-content",
														minWidth: modelDropdownRect.width,
													};
											return (
												<div
													ref={modelDropdownPanelRef}
													style={{
														position: "fixed",
														bottom,
														...panelPos,
														zIndex: 500,
														background: "var(--bg)",
														border: "1px solid var(--border)",
														borderRadius: 8,
														boxShadow: "0 -4px 16px rgba(0,0,0,0.10)",
														overflow: "hidden",
														maxHeight: maxH,
														display: "flex",
														flexDirection: "column",
													}}
												>
													{showModelFilter && (
														<div
															style={{
																padding: "6px 8px",
																borderBottom: "1px solid var(--border)",
																flexShrink: 0,
															}}
														>
															<input
																value={modelFilter}
																onChange={(e) => setModelFilter(e.target.value)}
																onKeyDown={(e) => {
																	if (e.key === "Escape") {
																		setModelFilter("");
																		setModelDropdownOpen(false);
																	}
																}}
																placeholder={t("chat.filterModels")}
																aria-label={t("chat.filterModels")}
																autoFocus
																autoComplete="off"
																spellCheck={false}
																style={{
																	width: "100%",
																	minWidth: isMobile ? 0 : 220,
																	fontSize: 11,
																	fontFamily: "var(--font-mono)",
																	padding: "5px 8px",
																	border: "1px solid var(--border)",
																	borderRadius: 5,
																	outline: "none",
																	background: "var(--bg)",
																	color: "var(--text)",
																	boxSizing: "border-box",
																}}
															/>
														</div>
													)}
													<div style={{ minHeight: 0, overflowY: "auto" }}>
														{modelsByProvider.length === 0 ? (
															<div
																style={{
																	padding: "8px 12px",
																	color: "var(--text-dim)",
																	fontSize: 12,
																	whiteSpace: "nowrap",
																}}
															>
																{modelFilter.trim()
																	? t("chat.noMatchingModels")
																	: "No available models"}
															</div>
														) : (
															modelsByProvider.map((group, gi) => (
																<div key={group.provider}>
																	{modelsByProvider.length > 1 && (
																		<div
																			style={{
																				padding: "6px 12px 4px",
																				fontSize: 10,
																				fontWeight: 600,
																				color: "var(--text-dim)",
																				textTransform: "uppercase",
																				letterSpacing: "0.07em",
																				borderTop:
																					gi > 0
																						? "1px solid var(--border)"
																						: "none",
																			}}
																		>
																			{group.provider}
																		</div>
																	)}
																	{group.options.map((opt) => {
																		const isActive =
																			opt.modelId === model?.modelId &&
																			opt.provider === model?.provider;
																		return (
																			<button
																				key={`${opt.provider}:${opt.modelId}`}
																				onClick={() => {
																					setModelDropdownOpen(false);
																					setModelFilter("");
																					if (!isActive || isAutoModelSelection)
																						onModelChange(
																							opt.provider,
																							opt.modelId,
																						);
																				}}
																				style={{
																					display: "flex",
																					alignItems: "center",
																					gap: 8,
																					width: "100%",
																					padding: "7px 12px",
																					background: isActive
																						? "var(--bg-selected)"
																						: "none",
																					border: "none",
																					color: isActive
																						? "var(--text)"
																						: "var(--text-muted)",
																					cursor: "pointer",
																					fontSize: 12,
																					textAlign: "left",
																					fontWeight: isActive ? 600 : 400,
																					whiteSpace: "nowrap",
																				}}
																				onMouseEnter={(e) => {
																					if (!isActive)
																						e.currentTarget.style.background =
																							"var(--bg-hover)";
																				}}
																				onMouseLeave={(e) => {
																					if (!isActive)
																						e.currentTarget.style.background =
																							"none";
																				}}
																			>
																				{isActive ? (
																					<svg
																						width="10"
																						height="10"
																						viewBox="0 0 10 10"
																						fill="none"
																						stroke="var(--accent)"
																						strokeWidth="2"
																						strokeLinecap="round"
																						strokeLinejoin="round"
																						style={{ flexShrink: 0 }}
																					>
																						<polyline points="1.5 5 4 7.5 8.5 2.5" />
																					</svg>
																				) : (
																					<span
																						style={{ width: 10, flexShrink: 0 }}
																					/>
																				)}
																				{opt.name}
																			</button>
																		);
																	})}
																</div>
															))
														)}
													</div>
												</div>
											);
										})()}
								</div>
							)}
					</div>

					{/* spacer */}
					{!isMobile && <div style={{ flex: 1 }} />}

					{/* RIGHT: thinking + tools preset + compact + sound (idle) | Stop + sound (streaming) */}
					<div
						ref={controlsMenuRef}
						style={{
							flex: "0 0 auto",
							display: "flex",
							alignItems: "center",
							justifyContent: "flex-end",
							position: "relative",
							marginLeft: isMobile ? 0 : "auto",
						}}
					>
						{isMobile && (
							<button
								type="button"
								title={controlsMenuOpen ? undefined : t("chat.moreControls")}
								aria-label={t("chat.moreControls")}
								aria-expanded={controlsMenuOpen}
								aria-hidden={controlsMenuOpen || undefined}
								tabIndex={controlsMenuOpen ? -1 : undefined}
								onClick={() => {
									setModelDropdownOpen(false);
									setModelFilter("");
									setControlsMenuOpen(true);
								}}
								style={{
									display: "flex",
									alignItems: "center",
									justifyContent: "center",
									width: "100%",
									height: 32,
									padding: "8px 10px",
									background: "none",
									border: "none",
									borderRadius: 9,
									color: "var(--text-muted)",
									cursor: controlsMenuOpen ? "default" : "pointer",
									fontSize: 12,
									fontWeight: 500,
									visibility: controlsMenuOpen ? "hidden" : "visible",
									pointerEvents: controlsMenuOpen ? "none" : "auto",
									transition: "background 0.12s, color 0.12s",
								}}
								onMouseEnter={(e) => {
									if (controlsMenuOpen) return;
									e.currentTarget.style.background = "var(--bg-hover)";
									e.currentTarget.style.color = "var(--text)";
								}}
								onMouseLeave={(e) => {
									if (controlsMenuOpen) return;
									e.currentTarget.style.background = "none";
									e.currentTarget.style.color = "var(--text-muted)";
								}}
							>
								{t("chat.moreControls")}
							</button>
						)}
						<div
							style={{
								display: isMobile
									? controlsMenuOpen
										? "flex"
										: "none"
									: "flex",
								alignItems: "center",
								gap: isMobile ? 1 : 2,
								...(isMobile
									? {
											position: "absolute",
											right: 0,
											bottom: 0,
											zIndex: 60,
											padding: 1,
											width: "max-content",
											maxWidth: "calc(100vw - 32px)",
											flexWrap: "nowrap",
											justifyContent: "flex-end",
											border:
												"1px solid color-mix(in srgb, var(--border) 72%, transparent)",
											borderRadius: 10,
											background:
												"color-mix(in srgb, var(--bg-panel) 92%, var(--bg))",
											boxShadow: "0 8px 24px rgba(0,0,0,0.14)",
											backdropFilter: "blur(10px)",
										}
									: null),
							}}
						>
							{!isStreaming && onThinkingLevelChange && (
								<div ref={thinkingDropdownRef} style={{ position: "relative" }}>
									<button
										onClick={() =>
											!isStreaming && setThinkingDropdownOpen((v) => !v)
										}
										disabled={isStreaming}
										title={t("chat.changeReasoning", {
											level: thinkingDisplayLabel,
										})}
										aria-label={t("chat.changeReasoningLabel")}
										style={{
											display: "flex",
											alignItems: "center",
											justifyContent: "center",
											gap: 5,
											padding: isMobile ? "0 6px" : "8px 12px",
											width: isMobile ? "auto" : undefined,
											height: 32,
											background: thinkingDropdownOpen
												? "var(--bg-hover)"
												: "none",
											border: "none",
											borderRadius: 9,
											color: "var(--text-muted)",
											cursor: isStreaming ? "not-allowed" : "pointer",
											fontSize: 12,
											opacity: isStreaming ? 0.5 : 1,
											transition: "background 0.12s, color 0.12s",
										}}
										onMouseEnter={(e) => {
											if (isStreaming) return;
											e.currentTarget.style.background = "var(--bg-hover)";
											e.currentTarget.style.color = "var(--text)";
										}}
										onMouseLeave={(e) => {
											e.currentTarget.style.background = thinkingDropdownOpen
												? "var(--bg-hover)"
												: "none";
											e.currentTarget.style.color = "var(--text-muted)";
										}}
									>
										<svg
											width="11"
											height="11"
											viewBox="0 0 24 24"
											fill="none"
											stroke="currentColor"
											strokeWidth="2"
											strokeLinecap="round"
											strokeLinejoin="round"
										>
											<path d="M9.5 2A5.5 5.5 0 0 0 4 7.5c0 1.7.78 3.21 2 4.21V14a1 1 0 0 0 1 1h5a1 1 0 0 0 1-1v-2.29c1.22-1 2-2.51 2-4.21A5.5 5.5 0 0 0 9.5 2z" />
											<line x1="7" y1="18" x2="12" y2="18" />
											<line x1="8" y1="21" x2="11" y2="21" />
										</svg>
										{(!isMobile || controlsMenuOpen) && (
											<span style={{ whiteSpace: "nowrap" }}>
												{thinkingDisplayLabel}
											</span>
										)}
									</button>
									{thinkingDropdownOpen && (
										<div
											style={{
												position: "absolute",
												bottom: "calc(100% + 6px)",
												right: 0,
												zIndex: 100,
												background: "var(--bg)",
												border: "1px solid var(--border)",
												borderRadius: 8,
												boxShadow: "0 -4px 16px rgba(0,0,0,0.10)",
												overflow: "hidden",
												minWidth: 180,
											}}
										>
											{THINKING_LEVELS.filter((lvl) => {
												if (!availableThinkingLevels) return true;
												if (lvl === "auto") return true;
												return availableThinkingLevels.includes(lvl);
											}).map((lvl) => {
												const isActive = (thinkingLevel ?? "auto") === lvl;
												const desc = t(THINKING_LEVEL_DESC_KEYS[lvl]);
												const mappedVal =
													lvl !== "auto" && thinkingLevelMap
														? thinkingLevelMap[lvl]
														: undefined;
												const displayLabel =
													mappedVal != null && mappedVal !== lvl
														? mappedVal
														: lvl;
												const showOriginal =
													mappedVal != null && mappedVal !== lvl;
												return (
													<button
														key={lvl}
														onClick={() => {
															setThinkingDropdownOpen(false);
															if (!isActive) onThinkingLevelChange(lvl);
														}}
														style={{
															display: "flex",
															alignItems: "center",
															gap: 8,
															width: "100%",
															padding: "7px 12px",
															background: isActive
																? "var(--bg-selected)"
																: "none",
															border: "none",
															color: isActive
																? "var(--text)"
																: "var(--text-muted)",
															cursor: "pointer",
															fontSize: 12,
															textAlign: "left",
															fontWeight: isActive ? 600 : 400,
															whiteSpace: "nowrap",
														}}
														onMouseEnter={(e) => {
															if (!isActive)
																e.currentTarget.style.background =
																	"var(--bg-hover)";
														}}
														onMouseLeave={(e) => {
															if (!isActive)
																e.currentTarget.style.background = "none";
														}}
													>
														{isActive ? (
															<svg
																width="10"
																height="10"
																viewBox="0 0 10 10"
																fill="none"
																stroke="var(--accent)"
																strokeWidth="2"
																strokeLinecap="round"
																strokeLinejoin="round"
																style={{ flexShrink: 0 }}
															>
																<polyline points="1.5 5 4 7.5 8.5 2.5" />
															</svg>
														) : (
															<span style={{ width: 10, flexShrink: 0 }} />
														)}
														<span style={{ flex: 1 }}>
															{displayLabel}
															{showOriginal && (
																<span
																	style={{
																		fontSize: 10,
																		color: "var(--text-dim)",
																		fontFamily: "var(--font-mono)",
																		marginLeft: 5,
																	}}
																>
																	({lvl})
																</span>
															)}
														</span>
														<span
															style={{
																fontSize: 11,
																color: "var(--text-dim)",
																marginLeft: 8,
															}}
														>
															{desc}
														</span>
													</button>
												);
											})}
										</div>
									)}
								</div>
							)}
							{!isStreaming && onToolPresetChange && (
								<div ref={toolDropdownRef} style={{ position: "relative" }}>
									<button
										onClick={() =>
											!isStreaming && setToolDropdownOpen((v) => !v)
										}
										disabled={isStreaming}
										title={t("chat.changeToolPreset") + `: ${toolPresetLabel}`}
										aria-label={t("chat.changeToolPreset")}
										style={{
											display: "flex",
											alignItems: "center",
											justifyContent: "center",
											gap: 5,
											padding: isMobile ? "0 6px" : "8px 12px",
											width: isMobile ? "auto" : undefined,
											height: 32,
											background: toolDropdownOpen ? "var(--bg-hover)" : "none",
											border: "none",
											borderRadius: 9,
											color: "var(--text-muted)",
											cursor: isStreaming ? "not-allowed" : "pointer",
											fontSize: 12,
											opacity: isStreaming ? 0.5 : 1,
											transition: "background 0.12s, color 0.12s",
										}}
										onMouseEnter={(e) => {
											if (isStreaming) return;
											e.currentTarget.style.background = "var(--bg-hover)";
											e.currentTarget.style.color = "var(--text)";
										}}
										onMouseLeave={(e) => {
											e.currentTarget.style.background = toolDropdownOpen
												? "var(--bg-hover)"
												: "none";
											e.currentTarget.style.color = "var(--text-muted)";
										}}
									>
										<svg
											width="11"
											height="11"
											viewBox="0 0 24 24"
											fill="none"
											stroke="currentColor"
											strokeWidth="2"
											strokeLinecap="round"
											strokeLinejoin="round"
										>
											<path d="M14.7 6.3a1 1 0 0 0 0 1.4l1.6 1.6a1 1 0 0 0 1.4 0l3.77-3.77a6 6 0 0 1-7.94 7.94l-6.91 6.91a2.12 2.12 0 0 1-3-3l6.91-6.91a6 6 0 0 1 7.94-7.94l-3.76 3.76z" />
										</svg>
										{(!isMobile || controlsMenuOpen) && (
											<span style={{ whiteSpace: "nowrap" }}>
												{toolPresetLabel}
											</span>
										)}
									</button>
									{toolDropdownOpen && (
										<div
											style={{
												position: "absolute",
												bottom: "calc(100% + 6px)",
												right: 0,
												zIndex: 100,
												background: "var(--bg)",
												border: "1px solid var(--border)",
												borderRadius: 8,
												boxShadow: "0 -4px 16px rgba(0,0,0,0.10)",
												overflow: "hidden",
												minWidth: 120,
											}}
										>
											{TOOL_PRESETS.map((lvl) => {
												const preset = TOOL_PRESET_MAP[lvl];
												const isActive = (toolPreset ?? "default") === preset;
												const desc =
													lvl === "off"
														? t("chat.noTools")
														: lvl === "default"
															? t("chat.builtInTools", { count: 4 })
															: t("chat.allBuiltInTools");
												return (
													<button
														key={lvl}
														onClick={() => {
															setToolDropdownOpen(false);
															if (!isActive) onToolPresetChange(preset);
														}}
														style={{
															display: "flex",
															alignItems: "center",
															gap: 8,
															width: "100%",
															padding: "7px 12px",
															background: isActive
																? "var(--bg-selected)"
																: "none",
															border: "none",
															color: isActive
																? "var(--text)"
																: "var(--text-muted)",
															cursor: "pointer",
															fontSize: 12,
															textAlign: "left",
															fontWeight: isActive ? 600 : 400,
															whiteSpace: "nowrap",
														}}
														onMouseEnter={(e) => {
															if (!isActive)
																e.currentTarget.style.background =
																	"var(--bg-hover)";
														}}
														onMouseLeave={(e) => {
															if (!isActive)
																e.currentTarget.style.background = "none";
														}}
													>
														{isActive ? (
															<svg
																width="10"
																height="10"
																viewBox="0 0 10 10"
																fill="none"
																stroke="var(--accent)"
																strokeWidth="2"
																strokeLinecap="round"
																strokeLinejoin="round"
																style={{ flexShrink: 0 }}
															>
																<polyline points="1.5 5 4 7.5 8.5 2.5" />
															</svg>
														) : (
															<span style={{ width: 10, flexShrink: 0 }} />
														)}
														<span style={{ flex: 1 }}>{lvl}</span>
														<span
															style={{
																fontSize: 11,
																color: "var(--text-dim)",
																marginLeft: 8,
															}}
														>
															{desc}
														</span>
													</button>
												);
											})}
										</div>
									)}
								</div>
							)}

							{!isStreaming && onCompact && (
								<div>
									<button
										onClick={isCompacting ? onAbortCompaction : onCompact}
										disabled={isStreaming && !isCompacting}
										style={{
											display: "flex",
											alignItems: "center",
											justifyContent: "center",
											gap: 5,
											padding: isMobile ? "0 6px" : "8px 12px",
											width: isMobile ? "auto" : undefined,
											height: 32,
											background: isCompacting
												? "rgba(239,68,68,0.08)"
												: "none",
											border: "none",
											borderRadius: 9,
											color: isCompacting ? "#ef4444" : "var(--text-muted)",
											cursor:
												isStreaming && !isCompacting
													? "not-allowed"
													: "pointer",
											fontSize: 12,
											opacity: isStreaming && !isCompacting ? 0.5 : 1,
											transition: "background 0.12s, color 0.12s",
										}}
										onMouseEnter={(e) => {
											if (isStreaming && !isCompacting) return;
											e.currentTarget.style.background = isCompacting
												? "rgba(239,68,68,0.16)"
												: "var(--bg-hover)";
											e.currentTarget.style.color = isCompacting
												? "#ef4444"
												: "var(--text)";
										}}
										onMouseLeave={(e) => {
											e.currentTarget.style.background = isCompacting
												? "rgba(239,68,68,0.08)"
												: "none";
											e.currentTarget.style.color = isCompacting
												? "#ef4444"
												: "var(--text-muted)";
										}}
										title={
											isCompacting
												? t("chat.stopCompaction")
												: t("chat.compactContext")
										}
										aria-label={
											isCompacting
												? t("chat.stopCompaction")
												: t("chat.compactContext")
										}
									>
										{isCompacting ? (
											<>
												<svg
													width="10"
													height="10"
													viewBox="0 0 10 10"
													fill="none"
												>
													<rect
														x="2"
														y="2"
														width="6"
														height="6"
														rx="1"
														fill="currentColor"
													/>
												</svg>
												{(!isMobile || controlsMenuOpen) && (
													<span style={{ whiteSpace: "nowrap" }}>
														{t("chat.compacting")}
													</span>
												)}
											</>
										) : (
											<>
												<svg
													width="11"
													height="11"
													viewBox="0 0 24 24"
													fill="none"
													stroke="currentColor"
													strokeWidth="2"
													strokeLinecap="round"
													strokeLinejoin="round"
												>
													<polyline points="4 14 10 14 10 20" />
													<polyline points="20 10 14 10 14 4" />
													<line x1="10" y1="14" x2="3" y2="21" />
													<line x1="21" y1="3" x2="14" y2="10" />
												</svg>
												{(!isMobile || controlsMenuOpen) && (
													<span style={{ whiteSpace: "nowrap" }}>
														{t("chat.compact")}
													</span>
												)}
											</>
										)}
									</button>
								</div>
							)}

							{isStreaming && (
								<button
									onClick={onAbort}
									title={t("chat.stopAgent")}
									style={{
										display: "flex",
										alignItems: "center",
										gap: 6,
										padding: "8px 14px",
										height: 32,
										background: "rgba(239,68,68,0.08)",
										border: "1px solid rgba(239,68,68,0.3)",
										borderRadius: 9,
										color: "#ef4444",
										cursor: "pointer",
										fontSize: 12,
										fontWeight: 600,
										whiteSpace: "nowrap",
										letterSpacing: "-0.01em",
										transition: "background 0.12s",
									}}
									onMouseEnter={(e) => {
										e.currentTarget.style.background = "rgba(239,68,68,0.16)";
									}}
									onMouseLeave={(e) => {
										e.currentTarget.style.background = "rgba(239,68,68,0.08)";
									}}
								>
									<svg width="10" height="10" viewBox="0 0 10 10" fill="none">
										<rect
											x="1.5"
											y="1.5"
											width="7"
											height="7"
											rx="1.5"
											fill="currentColor"
										/>
									</svg>
									{t("chat.stop")}
								</button>
							)}

							{onSoundToggle !== undefined && (
								<button
									onClick={onSoundToggle}
									title={
										soundEnabled
											? t("chat.disableSound")
											: t("chat.enableSound")
									}
									aria-label={
										soundEnabled
											? t("chat.disableSound")
											: t("chat.enableSound")
									}
									style={{
										display: "flex",
										alignItems: "center",
										justifyContent: "center",
										gap: 5,
										width: isMobile ? 32 : 32,
										height: 32,
										padding: 0,
										background: "none",
										border: "none",
										borderRadius: 9,
										color: soundEnabled
											? "var(--text-muted)"
											: "var(--text-dim)",
										cursor: "pointer",
										opacity: soundEnabled ? 1 : 0.55,
										transition: "background 0.12s, color 0.12s, opacity 0.12s",
									}}
									onMouseEnter={(e) => {
										e.currentTarget.style.background = "var(--bg-hover)";
										e.currentTarget.style.color = "var(--text)";
										e.currentTarget.style.opacity = "1";
									}}
									onMouseLeave={(e) => {
										e.currentTarget.style.background = "none";
										e.currentTarget.style.color = soundEnabled
											? "var(--text-muted)"
											: "var(--text-dim)";
										e.currentTarget.style.opacity = soundEnabled ? "1" : "0.55";
									}}
								>
									{soundEnabled ? (
										<svg
											width="12"
											height="12"
											viewBox="0 0 24 24"
											fill="none"
											stroke="currentColor"
											strokeWidth="2"
											strokeLinecap="round"
											strokeLinejoin="round"
										>
											<polygon points="11 5 6 9 2 9 2 15 6 15 11 19 11 5" />
											<path d="M15.54 8.46a5 5 0 0 1 0 7.07" />
											<path d="M19.07 4.93a10 10 0 0 1 0 14.14" />
										</svg>
									) : (
										<svg
											width="12"
											height="12"
											viewBox="0 0 24 24"
											fill="none"
											stroke="currentColor"
											strokeWidth="2"
											strokeLinecap="round"
											strokeLinejoin="round"
										>
											<polygon points="11 5 6 9 2 9 2 15 6 15 11 19 11 5" />
											<line x1="23" y1="9" x2="17" y2="15" />
											<line x1="17" y1="9" x2="23" y2="15" />
										</svg>
									)}
								</button>
							)}
							{isMobile && controlsMenuOpen && (
								<button
									type="button"
									title={t("chat.collapseControls")}
									aria-label={t("chat.collapseControls")}
									aria-expanded={true}
									onClick={() => {
										setToolDropdownOpen(false);
										setThinkingDropdownOpen(false);
										setControlsMenuOpen(false);
									}}
									style={{
										display: "flex",
										alignItems: "center",
										justifyContent: "center",
										width: 36,
										height: 32,
										padding: 0,
										marginLeft: 0,
										background: "var(--bg-hover)",
										border: "none",
										borderLeft:
											"1px solid color-mix(in srgb, var(--border) 72%, transparent)",
										borderRadius: "0 9px 9px 0",
										color: "var(--text)",
										cursor: "pointer",
										transition: "background 0.12s, color 0.12s",
									}}
									onMouseEnter={(e) => {
										e.currentTarget.style.background = "var(--bg-selected)";
									}}
									onMouseLeave={(e) => {
										e.currentTarget.style.background = "var(--bg-hover)";
									}}
								>
									<svg
										width="13"
										height="13"
										viewBox="0 0 24 24"
										fill="none"
										stroke="currentColor"
										strokeWidth="2"
										strokeLinecap="round"
									>
										<line x1="18" y1="6" x2="6" y2="18" />
										<line x1="6" y1="6" x2="18" y2="18" />
									</svg>
								</button>
							)}
						</div>
					</div>
				</div>
			</div>
		</div>
	);
});