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\"element\" : \"text\",\n\t\t\t);\n\t\t\tselection.focus.set(\n\t\t\t\tresolved.focusKey,\n\t\t\t\tresolved.focusOffset,\n\t\t\t\t$isElementNode(focus) ? \"element\" : \"text\",\n\t\t\t);\n\t\t\t$setSelection(selection);\n\t\t\tlet reference = $createResearchNode(id);\n\t\t\t$insertNodes([reference]);\n\t\t\tkey = reference.getKey();\n\t\t}, { discrete: true });\n\t} catch {\n\t\treturn false;\n\t}\n\tif (!key) return false;\n\tlet inserted = false;\n\teditor.getEditorState().read(() => {\n\t\tlet reference = $getNodeByKey(key!);\n\t\tinserted = $isResearchNode(reference) && reference.getId() === id && reference.isAttached();\n\t});\n\treturn inserted;\n}\n\nexport function dismissResearchComposer(\n\teditor: Pick,\n\tdismiss: () => void,\n): void {\n\tdismiss();\n\teditor.focus();\n}\n\nexport function beginResearchDraft(\n\tdrafts: ResearchDraftStore,\n\tconsume: () => { anchor: DOMRectLike; position?: Y.RelativePosition } | undefined,\n): boolean {\n\tif (!drafts.canOpen()) return false;\n\tlet next = consume();\n\treturn next ? drafts.open(next.anchor, next.position) : false;\n}\n\n/** The private surface participates in flow without becoming collaborative content. */\nexport function attachDraft(block: HTMLElement, host: HTMLElement): () => void {\n\tblock.dataset.researchDraftAnchor = \"\";\n\tblock.after(host);\n\treturn () => {\n\t\tdelete block.dataset.researchDraftAnchor;\n\t};\n}\n\nexport function retainDraftBlock(\n\tresolved: Block | undefined,\n\tprevious: Block | undefined,\n): Block | undefined {\n\treturn resolved ?? previous;\n}\n\nexport function attachmentBlock(\n\tresolved: Block,\n\toffset: number,\n\tprevious: Block | undefined,\n): Block {\n\treturn offset === 0 && previous ? previous : resolved;\n}\n\nexport const UNRESOLVED_DRAFT = \"This research draft cannot yet be placed at its saved position.\";\n\nexport function ResearchDraftShell(\n\t{ children, inert, motion, surfaceRef }: {\n\t\tchildren?: ReactNode;\n\t\tinert?: boolean;\n\t\tmotion?: string;\n\t\tsurfaceRef?: Ref;\n\t},\n) {\n\treturn (\n\t\t\n\t\t\t{children}\n\t\t\n\t);\n}\n\nfunction resolveAttachment(\n\teditor: ReturnType[0],\n\tbinding: Binding,\n\tposition: Y.RelativePosition,\n): Attachment | undefined {\n\tlet key: string | undefined;\n\tlet offset = 0;\n\ttry {\n\t\teditor.getEditorState().read(() => {\n\t\t\tlet resolved = $getAnchorAndFocusForUserState(binding, {\n\t\t\t\tanchorPos: position,\n\t\t\t\tfocusPos: position,\n\t\t\t\tcolor: \"\",\n\t\t\t\tfocusing: false,\n\t\t\t\tname: \"\",\n\t\t\t\tawarenessData: {},\n\t\t\t});\n\t\t\tkey = resolved.anchorKey || undefined;\n\t\t\toffset = resolved.anchorOffset;\n\t\t});\n\t} catch {\n\t\treturn undefined;\n\t}\n\tif (!key) return undefined;\n\tlet resolved = blockElement(editor, key);\n\tlet previous = resolved?.previousElementSibling as HTMLElement | null;\n\tif (previous?.classList.contains(\"plan-research-draft-host\")) {\n\t\tprevious = previous.previousElementSibling as HTMLElement | null;\n\t}\n\tlet block = resolved\n\t\t? attachmentBlock(\n\t\t\tresolved,\n\t\t\toffset,\n\t\t\tprevious ?? undefined,\n\t\t)\n\t\t: undefined;\n\treturn block ? { block } : undefined;\n}\n\nfunction currentPosition(\n\teditor: ReturnType[0],\n\tbinding?: Binding,\n): Y.RelativePosition | undefined {\n\tif (!binding) return undefined;\n\tlet found: Y.RelativePosition | undefined;\n\teditor.getEditorState().read(() => {\n\t\tfound = captureResearchPosition(binding);\n\t});\n\treturn found;\n}\n\nexport type ResearchComposerSurfaceProps = {\n\tbinding?: Binding;\n\tdisabled?: boolean;\n\tdrafts: ResearchDraftStore;\n\tresearch: ResearchStore;\n};\n\nexport function ResearchComposerSurface(\n\t{ binding, disabled, drafts, research }: ResearchComposerSurfaceProps,\n) {\n\tlet [editor] = useLexicalComposerContext();\n\tlet subscribe = useCallback((listener: () => void) => drafts.subscribe(listener), [drafts]);\n\tlet read = useCallback(() => drafts.get(), [drafts]);\n\tlet draft = useSyncExternalStore(subscribe, read, read);\n\tlet surface = useRef(null);\n\tlet attached = useRef<{ block: HTMLElement; detach: () => void } | undefined>(undefined);\n\tlet slot = useRef(undefined);\n\tlet [host, setHost] = useState();\n\tlet [unresolved, setUnresolved] = useState(false);\n\tlet presence = useTransitionPresence(draft, 150, false);\n\tlet shown = presence.value;\n\tlet visible = !!draft;\n\n\tuseEffect(() =>\n\t\teditor.registerCommand(\n\t\t\tOPEN_RESEARCH_COMMAND,\n\t\t\t({ anchor, consume }) => {\n\t\t\t\tif (disabled) return false;\n\t\t\t\treturn beginResearchDraft(drafts, () => {\n\t\t\t\t\tif (!consume()) return;\n\t\t\t\t\treturn {\n\t\t\t\t\t\tanchor,\n\t\t\t\t\t\tposition: binding ? captureResearchPosition(binding) : undefined,\n\t\t\t\t\t};\n\t\t\t\t});\n\t\t\t},\n\t\t\tCOMMAND_PRIORITY_LOW,\n\t\t), [binding, disabled, drafts, editor]);\n\n\tlet detach = useCallback(() => {\n\t\tattached.current?.detach();\n\t\tattached.current = undefined;\n\t}, []);\n\tlet place = useCallback(() => {\n\t\tlet root = editor.getRootElement();\n\t\tlet host = slot.current;\n\t\tif (!root || !host || !draft) return;\n\t\tlet resolved = binding && draft.position\n\t\t\t? resolveAttachment(editor, binding, draft.position)\n\t\t\t: undefined;\n\t\tlet previous = attached.current?.block;\n\t\tif (previous && !previous.isConnected) previous = undefined;\n\t\tlet block = retainDraftBlock(resolved?.block, previous);\n\t\tsetUnresolved(!!binding && !!draft.position && !resolved);\n\t\tif (!block) {\n\t\t\tif (host.parentElement !== root) root.append(host);\n\t\t\treturn;\n\t\t}\n\t\tif (attached.current?.block === block && block.nextElementSibling === host) return;\n\t\tdetach();\n\t\tattached.current = { block, detach: attachDraft(block, host) };\n\t}, [binding, draft, editor, detach]);\n\n\tuseLayoutEffect(() => {\n\t\tif (!shown) {\n\t\t\tdetach();\n\t\t\tslot.current?.remove();\n\t\t\tslot.current = undefined;\n\t\t\tsetHost(undefined);\n\t\t\treturn;\n\t\t}\n\t\tif (!slot.current) {\n\t\t\tlet element = document.createElement(\"div\");\n\t\t\telement.className = \"plan-research-draft-host\";\n\t\t\telement.contentEditable = \"false\";\n\t\t\tsetDOMUnmanaged(element, { captureSelection: true });\n\t\t\t// React handles portal events on this host; keep native keys out of Lexical.\n\t\t\telement.addEventListener(\"keydown\", event => event.stopPropagation());\n\t\t\telement.addEventListener(\"focusout\", () => {\n\t\t\t\tlet selection = element.ownerDocument.getSelection();\n\t\t\t\tif (selection?.anchorNode && element.contains(selection.anchorNode)) {\n\t\t\t\t\tselection.removeAllRanges();\n\t\t\t\t}\n\t\t\t});\n\t\t\tslot.current = element;\n\t\t\tsetHost(element);\n\t\t}\n\t\tplace();\n\t}, [detach, place, shown]);\n\tuseLayoutEffect(() => {\n\t\t// Restore the caret after the closing draft becomes inert.\n\t\tif (shown && !draft) editor.focus();\n\t}, [draft, editor, shown]);\n\tuseEffect(() => () => {\n\t\tdetach();\n\t\tslot.current?.remove();\n\t}, [detach]);\n\tuseEffect(() => {\n\t\tif (!visible || !host) return;\n\t\tlet frame = requestAnimationFrame(() => {\n\t\t\tlet element = surface.current;\n\t\t\telement?.scrollIntoView({ block: \"nearest\" });\n\t\t\telement?.querySelector(\"textarea\")?.focus({ preventScroll: true });\n\t\t});\n\t\treturn () => cancelAnimationFrame(frame);\n\t}, [host, visible]);\n\tlet settled = !!draft && !draft.submitting && !draft.cancelling;\n\tuseEffect(() => {\n\t\t// A disabled textarea drops focus while a request is in flight; return it for a retry.\n\t\tif (!settled) return;\n\t\tlet textarea = surface.current?.querySelector(\"textarea\");\n\t\tif (textarea && document.activeElement === document.body) {\n\t\t\ttextarea.focus({ preventScroll: true });\n\t\t}\n\t}, [settled]);\n\tuseEffect(() => {\n\t\tif (!draft) return;\n\t\treturn editor.registerUpdateListener(place);\n\t}, [draft, editor, place]);\n\n\tuseLayoutEffect(() => {\n\t\tif (!binding || disabled) return;\n\t\treturn drafts.attachPlacement((saved, id) =>\n\t\t\tinsertResearchReference(editor, binding, saved, id)\n\t\t);\n\t}, [binding, disabled, drafts, editor]);\n\n\tif (!shown || !host) return null;\n\tlet current = draft ?? 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