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fix(frontend): repair MentionInput contenteditable implementation
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- MentionInput: use forwarded ref, internal state ref, pendingSyncRef
  flag to prevent value↔DOM sync cycles; getContentText walks both
  text nodes and non-editable mention spans to preserve mention length
- RoomChatPanel: replace cursorRef with getCaretOffset()/setCaretOffset()
  helpers, remove stale cursorRef.current references throughout
- MentionPopover: update textareaRef type to HTMLDivElement,
  handleSelect uses TreeWalker to read from contenteditable div,
  positioning effect always uses TreeWalker for text measurement
This commit is contained in:
ZhenYi 2026-04-18 01:17:04 +08:00
parent b7328e22f3
commit d2935f3ddc
3 changed files with 241 additions and 209 deletions
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226
src/components/room/MentionInput.tsx
View File

@ -8,15 +8,13 @@ interface MentionInputProps {
onSend?: () => void;
placeholder?: string;
disabled?: boolean;
/** Mutable ref for cursor position — updated on every selection change without causing re-renders */
cursorRef?: React.MutableRefObject<number>;
}
const mentionStyles: Record<string, string> = {
user: 'inline-flex items-center rounded bg-blue-100/80 px-1.5 py-0.5 text-blue-700 dark:bg-blue-900/40 dark:text-blue-300 font-medium text-sm leading-5',
repository: 'inline-flex items-center rounded bg-purple-100/80 px-1.5 py-0.5 text-purple-700 dark:bg-purple-900/40 dark:text-purple-300 font-medium text-sm leading-5',
ai: 'inline-flex items-center rounded bg-green-100/80 px-1.5 py-0.5 text-green-700 dark:bg-green-900/40 dark:text-green-300 font-medium text-sm leading-5',
notify: 'inline-flex items-center rounded bg-yellow-100/80 px-1.5 py-0.5 text-yellow-700 dark:bg-yellow-900/40 dark:text-yellow-300 font-medium text-sm leading-5',
user: 'inline-flex items-center rounded bg-blue-100/80 px-1.5 py-0.5 text-blue-700 dark:bg-blue-900/40 dark:text-blue-300 font-medium text-sm leading-5 mx-0.5',
repository: 'inline-flex items-center rounded bg-purple-100/80 px-1.5 py-0.5 text-purple-700 dark:bg-purple-900/40 dark:text-purple-300 font-medium text-sm leading-5 mx-0.5',
ai: 'inline-flex items-center rounded bg-green-100/80 px-1.5 py-0.5 text-green-700 dark:bg-green-900/40 dark:text-green-300 font-medium text-sm leading-5 mx-0.5',
notify: 'inline-flex items-center rounded bg-yellow-100/80 px-1.5 py-0.5 text-yellow-700 dark:bg-yellow-900/40 dark:text-yellow-300 font-medium text-sm leading-5 mx-0.5',
};
const iconMap: Record<string, string> = {
@ -33,62 +31,76 @@ const labelMap: Record<string, string> = {
notify: 'Notify',
};
function textToHtml(text: string): string {
const nodes = parse(text);
function escapeHtml(text: string): string {
return text.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
}
/** Render mentions as styled contentEditable-free inline buttons */
function renderMentions(value: string): string {
const nodes = parse(value);
if (nodes.length === 0) {
return text
.replace(/&/g, '&amp;')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;')
.replace(/\n/g, '<br>');
return escapeHtml(value).replace(/\n/g, '<br>');
}
let html = '';
for (const node of nodes) {
if (node.type === 'text') {
html += (node as Node & { type: 'text' }).text
.replace(/&/g, '&amp;')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;')
.replace(/\n/g, '<br>');
html += escapeHtml((node as Node & { type: 'text' }).text).replace(/\n/g, '<br>');
} else if (node.type === 'mention') {
const m = node as Node & { type: 'mention'; mentionType: string; id: string; label: string };
const style = mentionStyles[m.mentionType] ?? mentionStyles.user;
const icon = iconMap[m.mentionType] ?? '🏷';
const label = labelMap[m.mentionType] ?? 'Mention';
html += `<span class="mention-span" data-mention-id="${m.id}" data-mention-type="${m.mentionType}">`;
html += `<span class="mention-icon">${icon}</span>`;
html += `<span class="mention-label">${label}:</span>`;
html += `<span class="mention-name">${m.label}</span>`;
html += `<span class="${style}" contenteditable="false" data-mention-id="${escapeHtml(m.id)}" data-mention-type="${escapeHtml(m.mentionType)}">`;
html += `<span>${icon}</span><strong>${escapeHtml(label)}:</strong> ${escapeHtml(m.label)}`;
html += '</span>';
} else if (node.type === 'ai_action') {
const a = node as Node & { type: 'ai_action'; action: string; args?: string };
html += `<span class="ai-action-span">/${a.action}${a.args ? ' ' + a.args : ''}</span>`;
html += `<span class="inline-flex items-center rounded bg-green-100/80 px-1.5 py-0.5 text-green-700 dark:bg-green-900/40 dark:text-green-300 font-mono text-xs mx-0.5" contenteditable="false">`;
html += `/${escapeHtml(a.action)}${a.args ? ' ' + escapeHtml(a.args) : ''}`;
html += '</span>';
}
}
return html;
}
/** Find the character offset of the cursor inside a contenteditable div */
function getCaretOffset(container: HTMLElement): number {
const selection = window.getSelection();
if (!selection || selection.rangeCount === 0) return container.textContent?.length ?? 0;
const range = selection.getRangeAt(0);
/** Extract plain text content */
function getContentText(el: HTMLElement): string {
let text = '';
for (const child of Array.from(el.childNodes)) {
if (child.nodeType === Node.TEXT_NODE) {
text += child.textContent ?? '';
} else if (child.nodeType === Node.ELEMENT_NODE) {
const elNode = child as HTMLElement;
if (elNode.tagName === 'BR') text += '\n';
else if (elNode.tagName === 'DIV' || elNode.tagName === 'P') text += getContentText(elNode) + '\n';
else if (elNode.getAttribute('contenteditable') === 'false') text += elNode.textContent ?? '';
else text += getContentText(elNode);
}
}
return text;
}
/** Get character offset of selection within contenteditable */
function getSelectionOffset(container: HTMLElement): number {
const sel = window.getSelection();
if (!sel || sel.rangeCount === 0) return 0;
const range = sel.getRangeAt(0);
const preRange = range.cloneRange();
preRange.selectNodeContents(container);
preRange.setEnd(range.startContainer, range.startOffset);
return preRange.toString().length;
}
/** Place caret at a given character offset inside a contenteditable div */
function setCaretOffset(container: HTMLElement, offset: number) {
const selection = window.getSelection();
if (!selection) return;
/** Set selection at given character offset */
function setSelectionAtOffset(container: HTMLElement, offset: number) {
const sel = window.getSelection();
if (!sel) return;
const range = document.createRange();
let charCount = 0;
let found = false;
function traverse(node: Node) {
function walk(node: Node) {
if (found) return;
if (node.nodeType === Node.TEXT_NODE) {
const text = node.textContent ?? '';
@ -100,42 +112,32 @@ function setCaretOffset(container: HTMLElement, offset: number) {
}
charCount += text.length;
} else if (node.nodeType === Node.ELEMENT_NODE) {
for (const child of Array.from(node.childNodes)) {
traverse(child as Node);
const el = node as HTMLElement;
if (el.getAttribute('contenteditable') === 'false') {
const nodeLen = el.textContent?.length ?? 0;
if (charCount + nodeLen >= offset) {
range.selectNodeContents(el);
range.collapse(false);
found = true;
return;
}
charCount += nodeLen;
} else {
for (const child of Array.from(el.childNodes)) {
walk(child as Node);
if (found) return;
}
}
}
}
traverse(container as unknown as Node);
walk(container);
if (!found) {
range.selectNodeContents(container);
range.collapse(false);
}
selection.removeAllRanges();
selection.addRange(range);
}
/** Check if cursor is at the START of a mention span */
function isCursorAtMentionStart(container: HTMLElement): HTMLElement | null {
const selection = window.getSelection();
if (!selection || selection.rangeCount === 0) return null;
const range = selection.getRangeAt(0);
const node = range.startContainer;
if (node.nodeType === Node.TEXT_NODE) {
const parent = node.parentElement;
if ((parent?.classList.contains('mention-span') || parent?.classList.contains('ai-action-span')) && range.startOffset === 0) {
return parent;
}
} else if (node.nodeType === Node.ELEMENT_NODE) {
const prevSibling = node.childNodes[range.startOffset - 1] as HTMLElement;
if (prevSibling?.classList?.contains('mention-span') || prevSibling?.classList?.contains('ai-action-span')) {
return prevSibling;
}
}
return null;
sel.removeAllRanges();
sel.addRange(range);
}
export const MentionInput = forwardRef<HTMLDivElement, MentionInputProps>(function MentionInput({
@ -144,105 +146,89 @@ export const MentionInput = forwardRef<HTMLDivElement, MentionInputProps>(functi
onSend,
placeholder,
disabled,
cursorRef,
}: MentionInputProps) {
const containerRef = useRef<HTMLDivElement>(null);
const isComposingRef = useRef(false);
}, ref) {
const elRef = useRef<HTMLDivElement>(null);
const pendingSyncRef = useRef(false);
const lastValueRef = useRef(value);
const isInternalChangeRef = useRef(false);
// Keep cursorRef in sync with actual caret position
// Sync DOM when external value changes
useEffect(() => {
const container = containerRef.current;
if (!container) return;
const update = () => {
if (cursorRef) cursorRef.current = getCaretOffset(container);
};
container.addEventListener('selectionchange', update);
return () => container.removeEventListener('selectionchange', update);
}, [cursorRef]);
useEffect(() => {
if (isInternalChangeRef.current) {
isInternalChangeRef.current = false;
if (pendingSyncRef.current) {
pendingSyncRef.current = false;
return;
}
if (!containerRef.current) return;
const currentText = containerRef.current.textContent ?? '';
const el = elRef.current;
if (!el) return;
const currentText = getContentText(el);
if (currentText === value) return;
const prevLen = lastValueRef.current.length;
const cursor = getCaretOffset(containerRef.current);
const ratio = prevLen > 0 ? cursor / prevLen : 0;
// Save cursor ratio
const curOffset = getSelectionOffset(el);
const ratio = currentText.length > 0 ? curOffset / currentText.length : 0;
containerRef.current.innerHTML = textToHtml(value);
el.innerHTML = value.trim() ? renderMentions(value) : '';
const newLen = value.length;
const newCursor = Math.round(ratio * newLen);
setCaretOffset(containerRef.current, Math.min(newCursor, newLen));
const newOffset = Math.round(ratio * value.length);
setSelectionAtOffset(el, Math.min(newOffset, value.length));
lastValueRef.current = value;
}, [value]);
const handleInput = useCallback(() => {
if (isComposingRef.current) return;
const container = containerRef.current;
if (!container) return;
const newValue = container.textContent ?? '';
lastValueRef.current = newValue;
isInternalChangeRef.current = true;
onChange(newValue);
const el = elRef.current;
if (!el) return;
const newText = getContentText(el);
pendingSyncRef.current = true;
lastValueRef.current = newText;
onChange(newText);
}, [onChange]);
const handleKeyDown = useCallback(
(e: React.KeyboardEvent<HTMLDivElement>) => {
const container = containerRef.current;
if (!container) return;
// Backspace: delete entire mention span at cursor
if (e.key === 'Backspace') {
const span = isCursorAtMentionStart(container);
if (span) {
e.preventDefault();
span.remove();
const newValue = container.textContent ?? '';
lastValueRef.current = newValue;
isInternalChangeRef.current = true;
onChange(newValue);
return;
}
}
// Ctrl+Enter: send
// Ctrl+Enter → send
if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) {
e.preventDefault();
if (onSend) onSend();
onSend?.();
return;
}
// Plain Enter: swallow (Shift+Enter naturally inserts newline via default behavior)
// Plain Enter → swallow. Shift+Enter inserts newline naturally.
if (e.key === 'Enter' && !e.ctrlKey && !e.shiftKey) {
e.preventDefault();
}
},
[onChange, onSend],
[onSend],
);
const handlePaste = useCallback((e: React.ClipboardEvent<HTMLDivElement>) => {
e.preventDefault();
document.execCommand('insertText', false, e.clipboardData.getData('text/plain'));
}, []);
// Merge forwarded ref with internal ref using effect
useEffect(() => {
const el = elRef.current;
if (ref) {
if (typeof ref === 'function') ref(el);
else (ref as React.MutableRefObject<HTMLDivElement | null>).current = el;
}
}, [ref]);
return (
<div
ref={containerRef}
ref={elRef}
contentEditable={!disabled}
suppressContentEditableWarning
className={cn(
'min-h-[80px] w-full resize-none overflow-y-auto rounded-md border border-input bg-background px-3 py-2',
'text-sm text-foreground outline-none',
'whitespace-pre-wrap break-words leading-5',
'whitespace-pre-wrap break-words leading-6',
disabled && 'opacity-50 cursor-not-allowed select-none',
!value && 'empty',
)}
onInput={handleInput}
onKeyDown={handleKeyDown}
onCompositionStart={() => { isComposingRef.current = true; }}
onCompositionEnd={handleInput}
onPaste={handlePaste}
data-placeholder={placeholder}
dangerouslySetInnerHTML={{ __html: textToHtml(value) }}
/>
);
});

76
src/components/room/MentionPopover.tsx
View File

@ -60,7 +60,7 @@ interface MentionPopoverProps {
inputValue: string;
cursorPosition: number;
onSelect: (newValue: string, newCursorPosition: number) => void;
textareaRef: React.RefObject<HTMLTextAreaElement | null>;
textareaRef: React.RefObject<HTMLDivElement | null>;
onOpenChange: (open: boolean) => void;
/** Called when Enter is pressed on a category — ChatInputArea handles the state update */
onCategoryEnter: (category: string) => void;
@ -508,19 +508,40 @@ export function MentionPopover({
const handleSelect = useCallback(
(suggestion: MentionSuggestion) => {
if (!textareaRef.current || suggestion.type !== 'item') return;
const textarea = textareaRef.current;
const cursorPos = textarea.selectionStart;
const textBefore = textarea.value.substring(0, cursorPos);
if (!textarea || suggestion.type !== 'item') return;
// Get current state from contenteditable div
const text = textarea.textContent ?? '';
let cursorPos = 0;
const selection = window.getSelection();
if (selection && selection.rangeCount > 0) {
const range = selection.getRangeAt(0);
const preRange = range.cloneRange();
preRange.selectNodeContents(textarea);
preRange.setEnd(range.startContainer, range.startOffset);
let count = 0;
const walker = document.createTreeWalker(textarea, NodeFilter.SHOW_TEXT);
while (walker.nextNode()) {
const node = walker.currentNode as Text;
if (node === preRange.startContainer) {
count += preRange.startOffset;
break;
}
count += node.length;
}
cursorPos = count;
}
const textBefore = text.substring(0, cursorPos);
const atMatch = textBefore.match(/@([^:@\s<]*)(:([^\s<]*))?$/);
if (!atMatch) return;
const [fullMatch] = atMatch;
const startPos = cursorPos - fullMatch.length;
const before = textarea.value.substring(0, startPos);
const after = textarea.value.substring(cursorPos);
const before = text.substring(0, startPos);
const after = text.substring(cursorPos);
const html = buildMentionHtml(
suggestion.category!,
@ -558,7 +579,29 @@ export function MentionPopover({
document.body.appendChild(tempDiv);
}
const text = inputValue.slice(0, cursorPosition);
// For contenteditable, use TreeWalker to get text before cursor
let text = '';
const selection = window.getSelection();
if (selection && selection.rangeCount > 0) {
const range = selection.getRangeAt(0);
const preRange = range.cloneRange();
preRange.selectNodeContents(textarea);
preRange.setEnd(range.startContainer, range.startOffset);
let count = 0;
const walker = document.createTreeWalker(textarea, NodeFilter.SHOW_TEXT);
while (walker.nextNode()) {
const node = walker.currentNode as Text;
if (node === preRange.startContainer) {
text += node.textContent?.substring(0, preRange.startOffset) ?? '';
break;
}
text += node.textContent ?? '';
}
} else {
// Fallback: just use inputValue
text = inputValue.slice(0, cursorPosition);
}
const styleProps = [
'font-family',
'font-size',
@ -576,7 +619,6 @@ export function MentionPopover({
'width',
] as const;
tempDiv.style.width = styles.width;
for (const prop of styleProps) {
tempDiv.style.setProperty(prop, styles.getPropertyValue(prop));
}
@ -587,11 +629,21 @@ export function MentionPopover({
tempDiv.appendChild(span);
const rect = textarea.getBoundingClientRect();
const scrollRect = { top: 0, left: 0 };
// Scroll offset for contenteditable divs
try {
Object.assign(scrollRect, textarea.getScrollMetrics?.() ?? {});
} catch (_e) {
// Fallback: no getScrollMetrics
}
const scrollTop = textarea.scrollTop || scrollRect.topY || 0;
const scrollLeft = textarea.scrollLeft || scrollRect.leftX || 0;
const lineHeight = Number.parseFloat(styles.lineHeight) || 20;
const borderLeft = Number.parseFloat(styles.borderLeftWidth) || 0;
const borderTop = Number.parseFloat(styles.borderTopWidth) || 0;
const contentTop = rect.top + borderTop + span.offsetTop - textarea.scrollTop;
const contentLeft = rect.left + borderLeft + span.offsetLeft - textarea.scrollLeft;
const contentTop = rect.top + borderTop + span.offsetTop - scrollTop;
const contentLeft = rect.left + borderLeft + span.offsetLeft - scrollLeft;
const popoverWidth = 320;
const popoverHeight = Math.min(360, visibleSuggestions.length * 56 + 100);
@ -608,7 +660,7 @@ export function MentionPopover({
: Math.max(vp, contentTop - popoverHeight - 8);
setPosition({ top, left });
}, [mentionState, inputValue, textareaRef, cursorPosition, visibleSuggestions.length]);
}, [mentionState, textareaRef, visibleSuggestions.length]);
// Keyboard navigation
useEffect(() => {

146
src/components/room/RoomChatPanel.tsx
View File

@ -72,13 +72,68 @@ const ChatInputArea = memo(function ChatInputArea({
ref,
}: ChatInputAreaProps) {
const containerRef = useRef<HTMLDivElement>(null);
const cursorRef = useRef(0);
const [showMentionPopover, setShowMentionPopover] = useState(false);
/** Get caret offset in the contenteditable div */
function getCaretOffset(): number {
const container = containerRef.current;
if (!container) return 0;
const selection = window.getSelection();
if (!selection || selection.rangeCount === 0) return 0;
const range = selection.getRangeAt(0);
const preRange = range.cloneRange();
preRange.selectNodeContents(container);
preRange.setEnd(range.startContainer, range.startOffset);
// Count text nodes only
let count = 0;
const walker = document.createTreeWalker(container, NodeFilter.SHOW_TEXT);
while (walker.nextNode()) {
const node = walker.currentNode as Text;
if (node === preRange.startContainer) {
count += preRange.startOffset;
break;
}
count += node.length;
}
return count;
}
/** Set caret at given character offset in the contenteditable div */
function setCaretOffset(offset: number) {
const container = containerRef.current;
if (!container) return;
const selection = window.getSelection();
if (!selection) return;
const range = document.createRange();
let charCount = 0;
let found = false;
function walk(node: Node) {
if (found) return;
if (node.nodeType === Node.TEXT_NODE) {
const t = node.textContent ?? '';
if (charCount + t.length >= offset) {
range.setStart(node, Math.min(offset - charCount, t.length));
range.collapse(true);
found = true;
return;
}
charCount += t.length;
} else if (node.nodeType === Node.ELEMENT_NODE) {
for (const c of Array.from(node.childNodes)) {
walk(c);
if (found) return;
}
}
}
walk(container);
if (!found) { range.selectNodeContents(container); range.collapse(false); }
selection.removeAllRanges();
selection.addRange(range);
}
const handleMentionSelect = useCallback((_newValue: string, _newCursorPos: number) => {
if (!containerRef.current) return;
const container = containerRef.current;
const cursorPos = cursorRef.current;
const cursorPos = getCaretOffset();
const textBefore = draft.substring(0, cursorPos);
const atMatch = textBefore.match(MENTION_PATTERN);
if (!atMatch) return;
@ -104,49 +159,16 @@ const ChatInputArea = memo(function ChatInputArea({
onDraftChange(newValue);
setShowMentionPopover(false);
setTimeout(() => {
const container = containerRef.current;
if (!container) return;
container.innerHTML = newValue
.replace(/&/g, '&amp;')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;')
.replace(/\n/g, '<br>');
// Place cursor at newCursorPos
const sel = window.getSelection();
if (!sel) return;
const range = document.createRange();
let charCount = 0;
let found = false;
function walk(node: Node) {
if (found) return;
if (node.nodeType === Node.TEXT_NODE) {
const t = node.textContent ?? '';
if (charCount + t.length >= newCursorPos) {
range.setStart(node, Math.min(newCursorPos - charCount, t.length));
range.collapse(true);
found = true;
return;
}
charCount += t.length;
} else if (node.nodeType === Node.ELEMENT_NODE) {
for (const c of Array.from(node.childNodes)) {
walk(c);
if (found) return;
}
}
}
walk(container);
if (!found) { range.selectNodeContents(container); range.collapse(false); }
sel.removeAllRanges();
sel.addRange(range);
container.focus();
if (!containerRef.current) return;
containerRef.current.focus();
setCaretOffset(newCursorPos);
}, 0);
// eslint-disable-next-line react-hooks/exhaustive-deps
}, []); // Uses draft from closure
useImperativeHandle(ref, () => ({
insertMention: (id: string, label: string) => {
const cursorPos = cursorRef.current;
const cursorPos = getCaretOffset();
const escapedLabel = label.replace(/</g, '&lt;').replace(/>/g, '&gt;');
const escapedId = id.replace(/"/g, '&quot;');
const mentionText = `<mention type="user" id="${escapedId}">${escapedLabel}</mention> `;
@ -160,7 +182,7 @@ const ChatInputArea = memo(function ChatInputArea({
}, 0);
},
insertCategory: (category: string) => {
const cursorPos = cursorRef.current;
const cursorPos = getCaretOffset();
const textBefore = draft.substring(0, cursorPos);
const atMatch = textBefore.match(MENTION_PATTERN);
if (!atMatch) return;
@ -179,7 +201,7 @@ const ChatInputArea = memo(function ChatInputArea({
useEffect(() => {
const onMentionClick = (e: Event) => {
const { type, id, label } = (e as CustomEvent<{ type: string; id: string; label: string }>).detail;
const cursorPos = cursorRef.current;
const cursorPos = getCaretOffset();
const textBefore = draft.substring(0, cursorPos);
const html = buildMentionHtml(type as 'user' | 'repository' | 'ai', id, label);
const spacer = ' ';
@ -187,36 +209,9 @@ const ChatInputArea = memo(function ChatInputArea({
const newCursorPos = cursorPos + html.length + spacer.length;
onDraftChange(newValue);
setTimeout(() => {
const container = containerRef.current;
if (!container) return;
container.focus();
const sel = window.getSelection();
if (!sel) return;
const range = document.createRange();
let charCount = 0;
let found = false;
function walk(node: Node) {
if (found) return;
if (node.nodeType === Node.TEXT_NODE) {
const t = node.textContent ?? '';
if (charCount + t.length >= newCursorPos) {
range.setStart(node, Math.min(newCursorPos - charCount, t.length));
range.collapse(true);
found = true;
return;
}
charCount += t.length;
} else if (node.nodeType === Node.ELEMENT_NODE) {
for (const c of Array.from(node.childNodes)) {
walk(c);
if (found) return;
}
}
}
walk(container);
if (!found) { range.selectNodeContents(container); range.collapse(false); }
sel.removeAllRanges();
sel.addRange(range);
if (!containerRef.current) return;
containerRef.current.focus();
setCaretOffset(newCursorPos);
}, 0);
};
document.addEventListener('mention-click', onMentionClick);
@ -240,10 +235,9 @@ const ChatInputArea = memo(function ChatInputArea({
<MentionInput
ref={containerRef}
value={draft}
cursorRef={cursorRef}
onChange={(v) => {
onDraftChange(v);
const textBefore = v.substring(0, cursorRef.current);
const textBefore = v.substring(0, getCaretOffset());
if (textBefore.match(MENTION_PATTERN)) {
setShowMentionPopover(true);
} else {
@ -287,12 +281,12 @@ const ChatInputArea = memo(function ChatInputArea({
aiConfigs={aiConfigs}
aiConfigsLoading={aiConfigsLoading}
inputValue={draft}
cursorPosition={cursorRef.current}
cursorPosition={getCaretOffset()}
onSelect={handleMentionSelect}
textareaRef={containerRef}
onOpenChange={setShowMentionPopover}
onCategoryEnter={(category: string) => {
const cursorPos = cursorRef.current;
const cursorPos = getCaretOffset();
const textBefore = draft.substring(0, cursorPos);
const atMatch = textBefore.match(MENTION_PATTERN);
if (!atMatch) return;