[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10,"_11":12},"actionData","errors","root",{"_271":-5,"_274":275,"_276":277},"routes/shell",{"_40":41,"_270":-5,"_271":-5,"_272":273},"routes/repo",{"_33":-7,"_34":35,"_36":37,"_38":39,"_40":41,"_42":31,"_43":31,"_44":31,"_45":31,"_46":31,"_47":31,"_48":49,"_50":49,"_51":31,"_52":-7,"_53":-7,"_54":55,"_56":57,"_58":59,"_60":-5,"_61":62,"_63":64,"_65":66,"_67":68},"routes/repo.blob",{"_13":14,"_15":16,"_17":18,"_19":20,"_21":14,"_22":23,"_24":-5,"_25":26,"_27":28,"_28":29,"_30":31,"_32":14},"ref","ad3f7313ea18f2fd9c5f9e3fb2ca9c5b1df67861","path","packages/ui/src/components/timeline/layout.ts","oid","a010fde5119e4926b2806ac46d9ff3e777effc53","size",24179,"commit","mounts",[],"source","plain",{"_13":14,"_15":16},"kind","text","import { useEffect, useMemo, useRef, useState } from \"react\";\nimport { clearCache } from \"@chenglou/pretext\";\n\nimport {\n\tcall as callBlock,\n\tcode as codeBlock,\n\tcommit as commitBlock,\n\tdiff as diffBlock,\n\texec as execBlock,\n\tfile as fileBlock,\n\tgrid as gridBlock,\n\timage as imageBlock,\n\tissueComment as issueCommentBlock,\n\tissueOpened as issueOpenedBlock,\n\tissueUpdate as issueUpdateBlock,\n\ttype Mention,\n\tpr as prBlock,\n\tprComment as prCommentBlock,\n\tpresence as presenceBlock,\n\tprReview as prReviewBlock,\n\tprReviewComment as prReviewCommentBlock,\n\tprUpdate as prUpdateBlock,\n\ttext as textBlock,\n\ttool as toolBlock,\n} from \"../blocks\";\nimport { fonts, parseSegments, VERSION } from \"../blocks/parse\";\nimport { ROW_HEIGHT as TOOL_ROW_HEIGHT } from \"../blocks/tool-layout\";\nimport { measureReactions } from \"../reactions/measure\";\nimport { TURN_SUMMARY_CARD_GAP, turnSummaryHeight } from \"../turn-summary/layout\";\nimport type { Block, Measurement } from \"../../lib/block\";\nimport { isCommentChunk } from \"../../lib/timeline\";\nimport type { Chunk, TimelineItem, ToolNode, WorkingItem } from \"../../lib/timeline\";\n\n// -- Layout constants --\n\nconst PAD = 12;\nconst GAP = 12;\nconst LINE = 22;\nconst BYLINE_HEIGHT = 16;\nconst AVATAR = 28;\nconst AVATAR_GAP = 8;\n// Avatar has a 2px (mt-0.5) baseline nudge — included so the floor doesn't clip it.\nconst AVATAR_NUDGE = 2;\nconst CONTENT_GAP = 4;\nconst TURN_GAP = TURN_SUMMARY_CARD_GAP;\nconst HEADER_GAP = 4;\nconst PR_COMMENT_GAP = HEADER_GAP;\nconst PR_COMMENT_BODY_GAP = 12;\nconst PR_COMMENT_BUBBLE_PAD_BOTTOM = 10;\nconst BUBBLE_GAP = 2;\nconst BUBBLE_BORDER = 1;\nconst BUBBLE_PAD_X = 12;\nconst BUBBLE_PAD_Y = 5;\nconst FILES_HEIGHT = 20;\nconst TOOL_GROUP_ROW_HEIGHT = TOOL_ROW_HEIGHT;\nconst TOOL_GROUP_PAD_Y = 6;\nconst TOOL_LIST_INDENT = 12;\nconst WORKING_SUMMARY_HEIGHT = TOOL_GROUP_ROW_HEIGHT;\nconst DAY_HEIGHT = 40;\nconst REACTION_GAP = 4;\nconst LANE = 52 * 16;\nconst TAIL = 40;\n\nfunction summaryId(group: string, kind: \"artifacts\" | \"files\"): string {\n\treturn `${group}:summary:${kind}`;\n}\n\n// -- Chunk → Block conversion --\n\n/** LRU cap — bounds memory while staying generous for long sessions. */\nconst CACHE_MAX = 2000;\nconst PARSE_MAX = 1000;\n\n/** Content-keyed LRU so unchanged chunks don't re-parse markdown on every render. */\nlet cache = new Map();\nlet parsed = new Map; failed?: boolean }>();\nlet stream = new Map>();\n\n// Pretext keeps the glyph widths it measured with whichever font was loaded at the time, so text\n// measured while a web font is still loading keeps fallback widths until every cache drops them.\nlet fontEpoch = 0;\nlet fontStale = false;\nlet fontListeners = new Set<() => void>();\n\nfunction refont() {\n\tclearCache();\n\tcache.clear();\n\tparsed.clear();\n\tstream.clear();\n\tmeasureCache = new WeakMap();\n\tfontEpoch++;\n\tfontStale = false;\n\tfor (let listener of fontListeners) listener();\n}\n\nfunction onFonts(listener: () => void): () => void {\n\tif (!fontListeners.size) document.fonts.addEventListener(\"loadingdone\", refont);\n\tfontListeners.add(listener);\n\t// A font that the render requested can finish loading before this subscription sees its event.\n\tvoid document.fonts.ready.then(() => {\n\t\tif (fontStale && document.fonts.check(fonts().font)) refont();\n\t});\n\treturn () => {\n\t\tfontListeners.delete(listener);\n\t\tif (!fontListeners.size) document.fonts.removeEventListener(\"loadingdone\", refont);\n\t};\n}\n\ntype Payload = Exclude;\n\ntype Slot = {\n\traw: string;\n\tsig: string;\n\tblocks: Block[];\n\tparsed: boolean;\n};\n\ntype KeyPart = boolean | number | string | null | undefined;\n\nfunction joinKey(kind: string, mode: string, ...parts: KeyPart[]): string {\n\treturn [\n\t\tkind,\n\t\tmode,\n\t\t...parts.map(part => {\n\t\t\tif (part == null) return \"\";\n\t\t\tif (typeof part === \"boolean\") return part ? \"1\" : \"0\";\n\t\t\treturn String(part);\n\t\t}),\n\t].join(\"\\0\");\n}\n\n/** Derive a cache key for a chunk. */\nfunction key(\n\tchunk: Payload,\n\texpanded: Set,\n\texpandedResults: Set,\n\tsettling: Set,\n\tstreaming: boolean,\n): string {\n\tlet mode = streaming ? \"stream\" : \"settled\";\n\tswitch (chunk.kind) {\n\t\tcase \"code\":\n\t\t\treturn joinKey(\"code\", mode, chunk.language, chunk.source);\n\t\tcase \"diff\":\n\t\t\treturn joinKey(\"diff\", mode, chunk.patch);\n\t\tcase \"image\":\n\t\t\treturn joinKey(\"image\", mode, chunk.src, chunk.width, chunk.height, chunk.alt);\n\t\tcase \"image-grid\":\n\t\t\treturn joinKey(\n\t\t\t\t\"grid\",\n\t\t\t\tmode,\n\t\t\t\t...chunk.images.flatMap(img => [img.src, img.width, img.height, img.alt]),\n\t\t\t);\n\t\tcase \"file\":\n\t\t\treturn joinKey(\"file\", mode, chunk.name);\n\t\tcase \"tool-group\":\n\t\t\treturn joinKey(\n\t\t\t\t\"tools\",\n\t\t\t\tmode,\n\t\t\t\t...chunk.tools.flatMap(t => [\n\t\t\t\t\tt.id,\n\t\t\t\t\tt.name,\n\t\t\t\t\tt.status,\n\t\t\t\t\tt.args,\n\t\t\t\t\tt.result,\n\t\t\t\t\t...(t.images || []),\n\t\t\t\t\texpanded.has(t.id),\n\t\t\t\t\texpandedResults.has(t.id),\n\t\t\t\t\tsettling.has(t.id),\n\t\t\t\t]),\n\t\t\t);\n\t\tcase \"commit\":\n\t\t\treturn joinKey(\"commit\", mode, chunk.sha, chunk.message, chunk.url);\n\t\tcase \"pr\":\n\t\t\treturn joinKey(\"pr\", mode, chunk.pr, chunk.title, chunk.url);\n\t\tcase \"pr-update\":\n\t\t\treturn joinKey(\"pru\", mode, chunk.pr, chunk.value, chunk.title, chunk.url);\n\t\tcase \"pr-comment\":\n\t\t\treturn joinKey(\"prc\", mode, chunk.pr, chunk.author, chunk.url);\n\t\tcase \"pr-review\":\n\t\t\treturn joinKey(\"prr\", mode, chunk.pr, chunk.action, chunk.reviewer, chunk.url, chunk.bubble);\n\t\tcase \"pr-review-comment\":\n\t\t\treturn joinKey(\n\t\t\t\t\"prrc\",\n\t\t\t\tmode,\n\t\t\t\tchunk.pr,\n\t\t\t\tchunk.author,\n\t\t\t\tchunk.path,\n\t\t\t\tchunk.line,\n\t\t\t\tchunk.url,\n\t\t\t\tchunk.bubble,\n\t\t\t);\n\t\tcase \"issue\":\n\t\t\treturn joinKey(\"iss\", mode, chunk.issue, chunk.author, chunk.url);\n\t\tcase \"issue-comment\":\n\t\t\treturn joinKey(\"issc\", mode, chunk.issue, chunk.author, chunk.url);\n\t\tcase \"issue-update\":\n\t\t\treturn joinKey(\"issu\", mode, chunk.issue, chunk.value, chunk.url);\n\t\tcase \"exec\":\n\t\t\treturn joinKey(\n\t\t\t\t\"exec\",\n\t\t\t\tmode,\n\t\t\t\tchunk.id,\n\t\t\t\tchunk.input,\n\t\t\t\tchunk.cwd,\n\t\t\t\tchunk.exitCode,\n\t\t\t\tchunk.aborted,\n\t\t\t\texpanded.has(chunk.id),\n\t\t\t\tchunk.stdout,\n\t\t\t\tchunk.stderr,\n\t\t\t);\n\t\tcase \"presence\":\n\t\t\treturn joinKey(\"pres\", mode, chunk.action, chunk.sender);\n\t\tcase \"call\":\n\t\t\treturn joinKey(\"call\", mode, chunk.action, chunk.sender);\n\t}\n}\n\nfunction sync(blocks: Block[], streaming: boolean) {\n\tfor (let block of blocks) (block as Block & { streaming?: boolean }).streaming = streaming;\n}\n\nfunction tools(\n\titems: ToolNode[],\n\texpanded: Set,\n\texpandedResults: Set,\n\tsettling: Set = new Set(),\n): Block[] {\n\treturn items.map(t =>\n\t\ttoolBlock(\n\t\t\t{\n\t\t\t\tid: t.id,\n\t\t\t\tname: t.name,\n\t\t\t\tstatus: t.status,\n\t\t\t\tagent: t.agent,\n\t\t\t\targs: t.args,\n\t\t\t\tresult: t.result,\n\t\t\t\timages: t.images,\n\t\t\t},\n\t\t\texpanded.has(t.id),\n\t\t\texpandedResults.has(t.id),\n\t\t\tsettling.has(t.id),\n\t\t)\n\t);\n}\n\n/** Build Block[] for a structured chunk. */\nfunction build(\n\tchunk: Payload,\n\texpanded: Set,\n\texpandedResults: Set,\n\tsettling: Set,\n\tstreaming = false,\n): Block[] {\n\tswitch (chunk.kind) {\n\t\tcase \"code\":\n\t\t\treturn [codeBlock(chunk.source, chunk.language, streaming)];\n\t\tcase \"diff\":\n\t\t\treturn [diffBlock(chunk.patch, streaming)];\n\t\tcase \"image\":\n\t\t\treturn [imageBlock(chunk.src, chunk.width, chunk.height, chunk.alt)];\n\t\tcase \"image-grid\":\n\t\t\treturn [gridBlock(chunk.images)];\n\t\tcase \"file\":\n\t\t\treturn [fileBlock(chunk.name, \"\")];\n\t\tcase \"tool-group\":\n\t\t\treturn tools(chunk.tools, expanded, expandedResults, settling);\n\t\tcase \"commit\":\n\t\t\treturn [commitBlock(chunk.sha, chunk.message, chunk.url)];\n\t\tcase \"pr\":\n\t\t\treturn [prBlock(chunk.pr, chunk.title, chunk.url)];\n\t\tcase \"pr-update\":\n\t\t\treturn [prUpdateBlock(chunk.pr, chunk.url, chunk.value, chunk.title)];\n\t\tcase \"pr-comment\":\n\t\t\treturn [prCommentBlock(chunk.pr, chunk.author, chunk.url, BYLINE_HEIGHT)];\n\t\tcase \"pr-review\":\n\t\t\treturn [prReviewBlock(\n\t\t\t\tchunk.pr,\n\t\t\t\tchunk.action,\n\t\t\t\tchunk.reviewer,\n\t\t\t\tchunk.url,\n\t\t\t\tchunk.bubble ? BYLINE_HEIGHT : undefined,\n\t\t\t)];\n\t\tcase \"pr-review-comment\":\n\t\t\treturn [prReviewCommentBlock(\n\t\t\t\tchunk.author,\n\t\t\t\tchunk.path,\n\t\t\t\tchunk.line,\n\t\t\t\tchunk.url,\n\t\t\t\tchunk.bubble ? BYLINE_HEIGHT : undefined,\n\t\t\t)];\n\t\tcase \"issue\":\n\t\t\treturn [issueOpenedBlock(chunk.issue, chunk.author, chunk.url, BYLINE_HEIGHT)];\n\t\tcase \"issue-comment\":\n\t\t\treturn [issueCommentBlock(chunk.issue, chunk.author, chunk.url, BYLINE_HEIGHT)];\n\t\tcase \"issue-update\":\n\t\t\treturn [issueUpdateBlock(chunk.issue, chunk.url, chunk.value)];\n\t\tcase \"exec\":\n\t\t\treturn [\n\t\t\t\texecBlock(\n\t\t\t\t\tchunk.id,\n\t\t\t\t\tchunk.input,\n\t\t\t\t\tchunk.exitCode,\n\t\t\t\t\tchunk.aborted,\n\t\t\t\t\tchunk.stdout,\n\t\t\t\t\tchunk.stderr,\n\t\t\t\t\texpanded.has(chunk.id),\n\t\t\t\t\tchunk.cwd,\n\t\t\t\t),\n\t\t\t];\n\t\tcase \"presence\":\n\t\t\treturn [presenceBlock(chunk.action, chunk.sender)];\n\t\tcase \"call\":\n\t\t\treturn [callBlock(chunk.action, chunk.sender)];\n\t}\n}\n\ntype Request = {\n\tkey: string;\n\traw: string;\n\tsig: string;\n\tmentions?: Mention[];\n\tplan: boolean;\n\tcompact: boolean;\n\tstreaming: boolean;\n\tslot?: string;\n};\n\nfunction parseKey(raw: string, sig: string, compact: boolean, streaming: boolean): string {\n\treturn [\n\t\t\"comark\",\n\t\tVERSION,\n\t\tcompact ? \"compact\" : \"regular\",\n\t\tstreaming ? \"stream\" : \"settled\",\n\t\tsig,\n\t\traw,\n\t]\n\t\t.join(\"\\0\");\n}\n\nfunction bump(map: Map, key: K, value: V, max: number) {\n\tif (map.has(key)) map.delete(key);\n\twhile (map.size >= max) map.delete(map.keys().next().value!);\n\tmap.set(key, value);\n}\n\nasync function parse(req: Request): Promise {\n\tlet parts = await parseSegments(\n\t\treq.raw,\n\t\treq.mentions,\n\t\tfonts(req.compact),\n\t\treq.streaming,\n\t\tundefined,\n\t\treq.plan,\n\t);\n\tlet blocks: Block[] = [];\n\tfor (let part of parts) {\n\t\tif (part.kind === \"text\") {\n\t\t\tblocks.push(\n\t\t\t\ttextBlock(part.raw, req.mentions, req.compact, req.streaming, part.blocks, req.plan),\n\t\t\t);\n\t\t} else if (part.kind === \"diff\") {\n\t\t\tblocks.push(diffBlock(part.patch, req.streaming));\n\t\t} else {\n\t\t\tblocks.push(codeBlock(part.source, part.language, req.streaming, part.nodes));\n\t\t}\n\t}\n\treturn blocks;\n}\n\nfunction start(req: Request): Promise {\n\tif (req.streaming && req.slot) {\n\t\tlet hit = stream.get(req.slot);\n\t\tif (hit) return hit;\n\t}\n\n\tlet hit = parsed.get(req.key);\n\tif (hit?.promise) return hit.promise;\n\n\tlet entry = hit || {};\n\tlet epoch = fontEpoch;\n\tentry.promise = parse(req).then(\n\t\tblocks => {\n\t\t\t// Blocks prepared before fonts changed are stale; the next render parses again.\n\t\t\tif (epoch !== fontEpoch) return blocks;\n\t\t\tentry.blocks = blocks;\n\t\t\tentry.promise = undefined;\n\t\t\tbump(parsed, req.key, entry, PARSE_MAX);\n\t\t\treturn blocks;\n\t\t},\n\t\terror => {\n\t\t\t// A failed parse must settle, not disappear. Deleting the cache entry here\n\t\t\t// let the render loop re-queue the same chunk every tick — a single poison\n\t\t\t// input (e.g. an imported issue/PR body that trips the parser) would spin\n\t\t\t// forever, pegging the CPU and thrashing memory until the app froze.\n\t\t\t// Instead, fall back to the raw-text placeholder and cache it as settled so\n\t\t\t// the offending message renders as plain text and the loop converges.\n\t\t\tconsole.error(\"timeline: markdown parse failed; rendering raw text\", error);\n\t\t\tlet fallback = placeholder(\n\t\t\t\treq.raw,\n\t\t\t\treq.mentions,\n\t\t\t\treq.plan,\n\t\t\t\treq.sig,\n\t\t\t\treq.compact,\n\t\t\t\treq.streaming,\n\t\t\t);\n\t\t\tentry.blocks = fallback;\n\t\t\tentry.promise = undefined;\n\t\t\tentry.failed = true;\n\t\t\tbump(parsed, req.key, entry, PARSE_MAX);\n\t\t\treturn fallback;\n\t\t},\n\t);\n\tif (req.streaming && req.slot) {\n\t\tlet promise = entry.promise;\n\t\tstream.set(req.slot, promise);\n\t\tpromise.then(\n\t\t\t() => {\n\t\t\t\tif (stream.get(req.slot!) === promise) stream.delete(req.slot!);\n\t\t\t},\n\t\t\t() => {\n\t\t\t\tif (stream.get(req.slot!) === promise) stream.delete(req.slot!);\n\t\t\t},\n\t\t);\n\t}\n\tbump(parsed, req.key, entry, PARSE_MAX);\n\treturn entry.promise;\n}\n\nfunction placeholder(\n\traw: string,\n\tmentions: Mention[] | undefined,\n\tplan: boolean,\n\tsig: string,\n\tcompact: boolean,\n\tstreaming: boolean,\n): Block[] {\n\tlet k = \"placeholder\\0\" + parseKey(raw, sig, compact, streaming);\n\tlet hit = cache.get(k);\n\tif (hit) {\n\t\tsync(hit, streaming);\n\t\tbump(cache, k, hit, CACHE_MAX);\n\t\treturn hit;\n\t}\n\tlet blocks = [textBlock(raw, mentions, compact, streaming, undefined, plan)];\n\tbump(cache, k, blocks, CACHE_MAX);\n\treturn blocks;\n}\n\nfunction textBlocks(\n\tchunk: Extract,\n\tmentions: Mention[] | undefined,\n\tsig: string,\n\tcompact: boolean,\n\tstreaming: boolean,\n\tslot: string,\n\tprev: Map,\n\tnext: Map,\n\tjobs: Request[],\n\tseen: Set,\n\tplan = false,\n): Block[] {\n\tlet k = parseKey(chunk.raw, sig, compact, streaming);\n\tlet old = prev.get(slot);\n\tif (!streaming && old?.parsed && old.raw === chunk.raw && old.sig === sig) {\n\t\tsync(old.blocks, streaming);\n\t\tnext.set(slot, old);\n\t\treturn old.blocks;\n\t}\n\n\tlet hit = parsed.get(k)?.blocks;\n\tif (hit) {\n\t\tsync(hit, streaming);\n\t\tnext.set(slot, { raw: chunk.raw, sig, blocks: hit, parsed: true });\n\t\treturn hit;\n\t}\n\n\tif (!parsed.get(k)?.promise && !seen.has(k) && (!streaming || !stream.has(slot))) {\n\t\tjobs.push({ key: k, raw: chunk.raw, sig, mentions, plan, compact, streaming, slot });\n\t\tseen.add(k);\n\t}\n\n\tlet keep = old;\n\tlet blocks = keep?.blocks || placeholder(chunk.raw, mentions, plan, sig, compact, streaming);\n\tsync(blocks, streaming);\n\tnext.set(slot, {\n\t\traw: chunk.raw,\n\t\tsig,\n\t\tblocks,\n\t\tparsed: !!keep && keep.raw === chunk.raw && keep.sig === sig && keep.parsed,\n\t});\n\treturn blocks;\n}\n\n/** Convert a timeline content chunk into Block instances, memoized by content (LRU). */\nfunction toBlocks(\n\tchunk: Payload,\n\texpanded: Set,\n\texpandedResults: Set,\n\tsettling: Set = new Set(),\n\tstreaming = false,\n): Block[] {\n\tlet k = key(chunk, expanded, expandedResults, settling, streaming);\n\tlet hit = cache.get(k);\n\tif (hit) {\n\t\tsync(hit, streaming);\n\t\tbump(cache, k, hit, CACHE_MAX);\n\t\treturn hit;\n\t}\n\tlet blocks = build(chunk, expanded, expandedResults, settling, streaming);\n\tbump(cache, k, blocks, CACHE_MAX);\n\treturn blocks;\n}\n\n/**\n * Per-block measurement cache keyed by width.\n * Block instances come from the LRU-cached `toBlocks` so references are stable —\n * a WeakMap keeps us free of the GC bookkeeping. Frame-build populates; render reads.\n */\nlet measureCache = new WeakMap>();\n\n/** Memoized single-pass measurement: one Pretext walk covers both height and fit. */\nfunction measureBlock(block: Block, width: number): Measurement {\n\tlet byWidth = measureCache.get(block);\n\tif (!byWidth) {\n\t\tbyWidth = new Map();\n\t\tmeasureCache.set(block, byWidth);\n\t}\n\tlet hit = byWidth.get(width);\n\tif (hit) return hit;\n\tlet m = block.measure(width);\n\tbyWidth.set(width, m);\n\treturn m;\n}\n\n/** Aggregate measurement across a row's blocks: summed height, max fit. */\nfunction measureRow(blocks: Block[], width: number): Measurement {\n\tlet h = 0, f = 0;\n\tfor (let b of blocks) {\n\t\tlet m = measureBlock(b, width);\n\t\th += m.height;\n\t\tif (m.fit > f) f = m.fit;\n\t}\n\treturn { height: h, fit: f };\n}\n\n/** Stable signature for a mentions list — used to key the text-block cache. */\nfunction mentionsSig(mentions?: Mention[]): string {\n\tif (!mentions?.length) return \"\";\n\tlet s = \"\";\n\tfor (let m of mentions) s += m.name + \"\\0\" + (m.avatar || \"\") + \"\\0\";\n\treturn s;\n}\n\nfunction eventTextCompact(chunks: Chunk[]): boolean {\n\treturn !isCommentChunk(chunks[0]?.kind);\n}\n\nasync function parseBlockMap(\n\ttimeline: TimelineItem[],\n\tmentions?: Mention[],\n\texpanded: Set = new Set(),\n\texpandedResults: Set = new Set(),\n\tsettling: Set = new Set(),\n\tplan = false,\n): Promise> {\n\tlet jobs: Promise[] = [];\n\tlet sig = mentionsSig(mentions) + (plan ? \"\\0plan\" : \"\");\n\n\tlet convert = async (chunks: Chunk[], id: string, compact = false, streaming = false) => {\n\t\tlet parts = await Promise.all(chunks.map(async chunk => {\n\t\t\tif (chunk.kind !== \"text\") {\n\t\t\t\treturn toBlocks(chunk, expanded, expandedResults, settling, streaming);\n\t\t\t}\n\t\t\tlet key = parseKey(chunk.raw, sig, compact, streaming);\n\t\t\tlet blocks = parsed.get(key)?.blocks || await start({\n\t\t\t\tkey,\n\t\t\t\traw: chunk.raw,\n\t\t\t\tsig,\n\t\t\t\tmentions,\n\t\t\t\tplan,\n\t\t\t\tcompact,\n\t\t\t\tstreaming,\n\t\t\t});\n\t\t\tsync(blocks, streaming);\n\t\t\treturn blocks;\n\t\t}));\n\t\treturn [id, parts.flat()] as const;\n\t};\n\n\tfor (let item of timeline) {\n\t\tif (item.kind === \"day\") continue;\n\t\tif (item.kind === \"event\") {\n\t\t\tjobs.push(convert(item.row.chunks, item.row.uid, eventTextCompact(item.row.chunks)));\n\t\t\tcontinue;\n\t\t}\n\n\t\tlet { group, turn } = item;\n\t\tif (turn) {\n\t\t\tfor (let w of turn.working) {\n\t\t\t\tif (w.type === \"text\") jobs.push(convert(w.chunks, w.id));\n\t\t\t\telse {\n\t\t\t\t\tjobs.push(\n\t\t\t\t\t\tPromise.resolve([w.id, tools(w.tools, expanded, expandedResults, settling)]),\n\t\t\t\t\t);\n\t\t\t\t}\n\t\t\t}\n\t\t\tif (turn.final) {\n\t\t\t\tjobs.push(convert(turn.final.chunks, turn.final.uid, false, !!turn.final.streaming));\n\t\t\t}\n\t\t} else {\n\t\t\tfor (let row of group.rows) jobs.push(convert(row.chunks, row.uid));\n\t\t}\n\t}\n\n\treturn new Map(await Promise.all(jobs));\n}\n\nfunction useBlockMap(\n\ttimeline: TimelineItem[],\n\tmentions?: Mention[],\n\texpanded: Set = new Set(),\n\texpandedResults: Set = new Set(),\n\tsettling: Set = new Set(),\n\tplan = false,\n): Map {\n\tlet [tick, setTick] = useState(0);\n\tlet prev = useRef(new Map());\n\tlet sig = mentionsSig(mentions) + (plan ? \"\\0plan\" : \"\");\n\tlet memo = useMemo(() => {\n\t\tif (!document.fonts.check(fonts().font)) fontStale = true;\n\t\tlet map = new Map();\n\t\tlet next = new Map();\n\t\tlet jobs: Request[] = [];\n\t\tlet seen = new Set();\n\n\t\tlet convert = (\n\t\t\tchunks: Chunk[],\n\t\t\tid: string,\n\t\t\tcompact = false,\n\t\t\tstreaming = false,\n\t\t): Block[] => {\n\t\t\tlet out: Block[] = [];\n\t\t\tfor (let i = 0; i < chunks.length; i++) {\n\t\t\t\tlet chunk = chunks[i]!;\n\t\t\t\tif (chunk.kind === \"text\") {\n\t\t\t\t\tout.push(...textBlocks(\n\t\t\t\t\t\tchunk,\n\t\t\t\t\t\tmentions,\n\t\t\t\t\t\tsig,\n\t\t\t\t\t\tcompact,\n\t\t\t\t\t\tstreaming,\n\t\t\t\t\t\t`${id}:${i}:${compact ? \"1\" : \"0\"}`,\n\t\t\t\t\t\tprev.current,\n\t\t\t\t\t\tnext,\n\t\t\t\t\t\tjobs,\n\t\t\t\t\t\tseen,\n\t\t\t\t\t\tplan,\n\t\t\t\t\t));\n\t\t\t\t} else {\n\t\t\t\t\tout.push(...toBlocks(chunk, expanded, expandedResults, settling, streaming));\n\t\t\t\t}\n\t\t\t}\n\t\t\treturn out;\n\t\t};\n\n\t\tfor (let item of timeline) {\n\t\t\tif (item.kind === \"day\") continue;\n\t\t\tif (item.kind === \"event\") {\n\t\t\t\tmap.set(\n\t\t\t\t\titem.row.uid,\n\t\t\t\t\tconvert(\n\t\t\t\t\t\titem.row.chunks,\n\t\t\t\t\t\titem.row.uid,\n\t\t\t\t\t\teventTextCompact(item.row.chunks),\n\t\t\t\t\t),\n\t\t\t\t);\n\t\t\t\tcontinue;\n\t\t\t}\n\n\t\t\tlet { group, turn } = item;\n\t\t\tif (turn) {\n\t\t\t\tfor (let w of turn.working) {\n\t\t\t\t\tif (w.type === \"text\") map.set(w.id, convert(w.chunks, w.id));\n\t\t\t\t\telse {\n\t\t\t\t\t\tmap.set(w.id, tools(w.tools, expanded, expandedResults, settling));\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\tif (turn.final) {\n\t\t\t\t\tmap.set(\n\t\t\t\t\t\tturn.final.uid,\n\t\t\t\t\t\tconvert(turn.final.chunks, turn.final.uid, false, !!turn.final.streaming),\n\t\t\t\t\t);\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tfor (let row of group.rows) map.set(row.uid, convert(row.chunks, row.uid));\n\t\t\t}\n\t\t}\n\n\t\treturn { jobs, map, next };\n\t}, [expanded, expandedResults, settling, sig, tick, timeline, mentions, plan]);\n\n\t// Publish the parse cache after commit so interrupted renders do not become the next baseline.\n\tuseEffect(() => {\n\t\tprev.current = memo.next;\n\t}, [memo]);\n\n\tuseEffect(() =>\n\t\tonFonts(() => {\n\t\t\tprev.current = new Map();\n\t\t\tsetTick(tick => tick + 1);\n\t\t}), []);\n\n\t// Missing markdown parses finish outside React; tick once they settle so measurement rebuilds.\n\tuseEffect(() => {\n\t\tif (!memo.jobs.length) return;\n\t\tlet cancelled = false;\n\t\tPromise.all(memo.jobs.map(start)).then(\n\t\t\t() => {\n\t\t\t\tif (!cancelled) setTick(tick => tick + 1);\n\t\t\t},\n\t\t\t() => {\n\t\t\t\tif (!cancelled) setTick(tick => tick + 1);\n\t\t\t},\n\t\t);\n\t\treturn () => {\n\t\t\tcancelled = true;\n\t\t};\n\t}, [memo.jobs]);\n\n\treturn memo.map;\n}\n\n// -- Height computation --\n\n/** Exact pixel height for a timeline item at a given container width. */\nfunction itemHeight(\n\titem: TimelineItem,\n\tblocks: Map,\n\twidth: number,\n\topen: Set = new Set(),\n\topenWorking: Set = new Set(),\n): number {\n\tif (item.kind === \"day\") return DAY_HEIGHT;\n\tif (item.kind === \"event\") {\n\t\tlet b = blocks.get(item.row.uid);\n\t\tlet content = width - PAD * 2 - AVATAR - AVATAR_GAP;\n\t\tif (!b) return AVATAR + AVATAR_NUDGE;\n\t\tif (isCommentChunk(item.row.chunks[0]?.kind) && b.length > 1) {\n\t\t\tlet head = b[0]!;\n\t\t\tlet body = b.slice(1);\n\t\t\tlet inner = content - BUBBLE_PAD_X * 2;\n\t\t\tlet height = measureRow([head], content).height;\n\t\t\tlet bodyHeight = measureRow(body, inner).height;\n\t\t\tif (body.length > 1) bodyHeight += (body.length - 1) * PR_COMMENT_BODY_GAP;\n\t\t\theight += PR_COMMENT_GAP + bodyHeight + BUBBLE_PAD_Y + PR_COMMENT_BUBBLE_PAD_BOTTOM;\n\t\t\treturn Math.max(height, AVATAR + AVATAR_NUDGE);\n\t\t}\n\t\tlet height = measureRow(b, content).height;\n\t\tif (b.length > 1) height += (b.length - 1) * CONTENT_GAP;\n\t\treturn Math.max(height, AVATAR + AVATAR_NUDGE);\n\t}\n\n\tlet { group, turn } = item;\n\tlet content = width - PAD * 2 - AVATAR - AVATAR_GAP;\n\tlet h = 0;\n\tlet hasByline = group.rows.length > 0;\n\tif (hasByline) h += BYLINE_HEIGHT;\n\n\tif (turn) {\n\t\tif (hasByline) h += HEADER_GAP;\n\t\tlet children = 0;\n\n\t\tif (turn.working.length) {\n\t\t\tlet working = content - BUBBLE_PAD_X * 2;\n\t\t\tlet hasSummary = !!turn.final;\n\t\t\tlet expanded = !hasSummary || openWorking.has(group.id);\n\t\t\th += workingSectionHeight(turn.working, blocks, working, open, hasSummary, expanded);\n\t\t\tchildren++;\n\t\t}\n\n\t\tif (turn.final) {\n\t\t\tlet b = blocks.get(turn.final.uid);\n\t\t\tlet inner = content - BUBBLE_PAD_X * 2;\n\t\t\tif (b) {\n\t\t\t\th += measureRow(b, inner).height;\n\t\t\t\tif (b.length > 1) h += (b.length - 1) * CONTENT_GAP;\n\t\t\t}\n\t\t\th += BUBBLE_PAD_Y * 2;\n\t\t\tif (turn.final.reactions?.length) {\n\t\t\t\th += REACTION_GAP + measureReactions(turn.final.reactions, content);\n\t\t\t}\n\t\t\tchildren++;\n\t\t}\n\n\t\tif (turn.artifacts.length || turn.files.length) {\n\t\t\th += turnSummaryHeight(\n\t\t\t\tturn.artifacts,\n\t\t\t\tturn.files,\n\t\t\t\topen.has(summaryId(group.id, \"artifacts\")),\n\t\t\t\topen.has(summaryId(group.id, \"files\")),\n\t\t\t);\n\t\t\tchildren++;\n\t\t}\n\t\tif (children === 0 && !hasByline) h = LINE * 2;\n\t\telse if (children > 1) h += (children - 1) * TURN_GAP;\n\t} else {\n\t\tfor (let row of group.rows) {\n\t\t\tlet isBubble = group.role === \"user\" || group.role === \"assistant\";\n\t\t\tlet w = isBubble ? content - BUBBLE_PAD_X * 2 : content;\n\t\t\tlet b = blocks.get(row.uid);\n\t\t\tif (b) h += measureRow(b, w).height;\n\t\t\tif (isBubble) h += BUBBLE_PAD_Y * 2;\n\t\t\tif (row.reactions?.length) {\n\t\t\t\th += REACTION_GAP + measureReactions(row.reactions, content);\n\t\t\t}\n\t\t}\n\t\tif (hasByline) h += HEADER_GAP;\n\t\tlet rowGap = group.role === \"user\" ? BUBBLE_GAP : CONTENT_GAP;\n\t\tif (group.rows.length > 1) h += (group.rows.length - 1) * rowGap;\n\t}\n\n\th += CONTENT_GAP;\n\n\treturn Math.max(h, AVATAR + AVATAR_NUDGE);\n}\n\nfunction workingSectionHeight(\n\titems: WorkingItem[],\n\tblocks: Map,\n\twidth: number,\n\topen: Set,\n\thasSummary: boolean,\n\texpanded: boolean,\n): number {\n\tlet h = BUBBLE_PAD_Y * 2 + BUBBLE_BORDER * 2;\n\tif (hasSummary) h += WORKING_SUMMARY_HEIGHT;\n\tif (!expanded) return h;\n\tlet content = 0;\n\tlet count = 0;\n\tfor (let item of items) {\n\t\tcontent += workingHeight(item, blocks, width, open);\n\t\tcount++;\n\t}\n\tif (count > 1) content += (count - 1) * CONTENT_GAP;\n\tif (hasSummary && count) content += CONTENT_GAP;\n\treturn h + content;\n}\n\nfunction workingHeight(\n\titem: WorkingItem,\n\tblocks: Map,\n\twidth: number,\n\topen: Set,\n): number {\n\tlet b = blocks.get(item.id) || [];\n\tif (item.type === \"text\") {\n\t\tlet h = measureRow(b, width).height;\n\t\tif (b.length > 1) h += (b.length - 1) * CONTENT_GAP;\n\t\treturn h;\n\t}\n\n\tlet h = TOOL_GROUP_ROW_HEIGHT + TOOL_GROUP_PAD_Y * 2;\n\tif (!open.has(item.id) || !b.length) return h;\n\th += measureRow(b, width - TOOL_LIST_INDENT).height;\n\th += b.length * CONTENT_GAP;\n\treturn h;\n}\n\nexport 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