# Session review > A research team’s session screen: the interview’s recording with a scrub preview, a transcript lit as it is spoken, and an assistant to question it. Review a recorded user interview without leaving the screen. Play, scrub with a preview of any moment, change the speed or go full screen; the transcript lights the phrase being said and keeps its line in view, and every timestamp seeks. Tabs hold the summary, comments and insights, and an assistant panel answers questions about the recording, streaming its replies with timestamps that jump to the moment. The recording is illustrated: no photo of anyone. A React component by Bruno Delorence: https://brunodelorence.com/components/session-review. MIT License, Copyright (c) 2026 Bruno Delorence. Category: Dashboards. ## Anatomy 1. **Sidebar**: The app’s mark, an icon nav with the current section marked, and the account. Its first button widens it to show labels; under 640 px it becomes a bar across the top. 2. **Breadcrumbs**: The study and the session, the last one marked as the current page. 3. **Header**: The session’s title over a two-line description with See more, then the More menu and Share. 4. **Facts**: Date, products, company and participant, as a definition list. 5. **Player**: The illustrated recording with the researcher picture-in-picture. Pressing the picture plays or pauses; the bar under it has volume, both clocks, the scrub bar, speed, cast and full screen. 6. **Tabs**: Summary, Transcript, Comments and Insights, as a tab list the arrow keys walk. 7. **Transcript**: One line per turn: its timestamp, the words and who said them. The line being spoken is kept at the top, its stamp blue and its current four words marked. 8. **Assistant**: Ask the recording a question: three suggestions, then answers that stream in with timestamp chips. It folds into a rail or closes. ## When to use - A research team reviewing a recorded interview: watching it, reading along, and pulling out what matters. - A recording whose words matter as much as its picture, so the transcript follows the time and every line seeks back to it. - Notes that point at moments: summary, comments and insights each carry a timestamp that plays from there. - Asking questions of one recording, with answers that cite the moments they come from. ## When not to use - A video to simply watch. Use a plain player; the tabs and the assistant only get in the way. - Comparing many sessions across a study. Use a table of sessions with tags and filters, and open this from a row. - A live call. This reviews a recording after the fact; a call needs its own controls and presence. - Editing the recording into clips or a reel. Use a timeline editor with in and out points. - A general chat assistant. This one only answers about the session on screen; use a chat thread for the rest. ## Installation Install it with the shadcn CLI, into components/session-review of any React project: ```sh npx shadcn@latest add https://brunodelorence.com/r/session-review.json ``` Or copy all the source files below into one folder of your project. Either way it needs React 19 and a bundler with CSS Modules (Next.js, Vite). It has a dark colour scheme. Its colours are CSS light-dark() pairs, kept inside @supports so that builds which rewrite light-dark() for older browsers leave them alone: it follows your page’s color-scheme (light unless the page sets one) or its colorScheme prop, with nothing to configure. Browsers without light-dark() show it light. ## Usage ```tsx import { SessionReview } from './session-review'; export function SessionPage() { return ( console.log('seek', time)} /> ); } ``` ## States - **Transcript**: Opens at 02:08, paused: the current line at the top of its box, its phrase marked. - **Summary**: A paragraph, then key moments, each with the timestamp it plays from. - **Comments**: The team’s notes, each pinned to a time; the field posts a new one at the current time. - **Insights**: Cards by kind (pain point, behaviour, opportunity) with the quote behind them. - **Scrub preview**: Hovering the scrub bar: a small frame of that moment over its time and the total, and the part ahead tinted. - **Not following**: After the transcript is scrolled by hand, it stops following; `Follow 02:08` brings the line back. - **Answered**: A suggestion asked and answered: the reply with three timestamp chips that seek the recording. - **Share open**: The link, with the current time as its start unless unchecked, and Copy link. - **More menu**: Reviewed (a checkbox item), Download transcript and Add a comment. - **Sidebar labels**: The sidebar widened over the screen with its labels; a press outside or Escape folds it. - **Assistant folded**: `assistant="folded"`: a rail with the assistant’s name; the recording takes the room. - **Assistant closed**: `assistant="closed"`: gone, with Ask Sorrel in the header to bring it back. - **Under 1100 px**: At 900 px the screen is one column: the assistant moves under the recording and the tabs. - **Under 640 px**: At 600 px the sidebar turns into a bar across the top, and the player drops volume, cast and the time left. - **Dark**: `colorScheme="dark"`, or a dark page: near-black, the recording unchanged. ## How it works - Nothing plays: the time is one number the screen owns. A timer adds a quarter of a second, times the speed, four times a second while playing, and holds while the screen is off-screen or the tab hidden. The scrub bar, both clocks, which figure talks and the transcript’s current line and phrase all read that number. - The picture is two inline SVG scenes, the participant in her room and the researcher’s picture-in-picture against a brick wall. While playing, each figure breathes and nods by CSS transforms on its groups, and the one speaking moves its mouth; pausing pauses every animation at once through animation-play-state. - The scrub bar is a role="slider" driven by pointer events with pointer capture: hovering shows a preview (a small copy of the scene, leaning as she did at that moment, with the hovered time over the total), pressing or dragging seeks. The played and hovered spans are full-width bars scaled from the left, so nothing is laid out again as time moves. - The transcript lights the line being spoken and, inside it, the phrase being said, four words at a time, from how far time has gone between this line and the next. Each seek or new line scrolls its line to the top of the box; scrolling by hand lets go until the Follow button brings it back. - The assistant’s answers are canned (data.ts): an answer is text and timestamps, split into tokens and revealed one every 38 ms; timestamps become chips that seek. The composer sends on Enter, adds the current time from its plus button, fakes a dictation from the microphone and has a menu for short answers or a new chat. The panel folds into a rail or closes, and the header brings it back. - Layout is by container queries on the root, so it answers to its own width: the full screen from 1100 px, 945 px tall with the tab’s content scrolling inside; under that the assistant moves below the recording; under 640 px the sidebar becomes a bar across the top. The player’s controls answer to the player’s own width, dropping the volume, casting and remaining time when narrow. - While on screen and untouched, a demo pointer plays the recording, previews and seeks on the scrub bar, jumps from a timestamp, asks the assistant and follows a timestamp in its answer, then walks the tabs and starts over. Any real input hands control to the reader. - Every colour is a light-dark() token on the root, so the screen follows the page’s color-scheme or the colorScheme prop; the recording keeps its own colours in both. ## API reference - **session** (`Session`, default `SESSION`): The session on screen: study, title, description, facts, length, the two people and the transcript (data.ts has the type and an invented interview). - **defaultTime** (`number`, default `128`): Where the recording opens, in seconds. - **defaultTab** (`'summary' | 'transcript' | 'comments' | 'insights'`, default `'transcript'`): The tab that opens. - **assistant** (`'open' | 'folded' | 'closed'`, default `'open'`): The assistant’s panel at first: open, folded into a rail, or closed. - **onSeek** (`(time: number) => void`): Called whenever the recording seeks, with the new time in seconds. - **autoplay** (`boolean`, default `true`): While on screen and untouched, a demo pointer plays, previews and seeks, jumps from a timestamp, asks the assistant and walks the tabs. Real input hands control to the reader. - **colorScheme** (`'light' | 'dark' | 'system'`): Light or dark colours, or the reader’s system setting; without it, the page’s color-scheme. - **defaultState** (`{ preview?: number; menu?: 'more' | 'share'; asked?: string; unfollowed?: boolean; labels?: boolean }`): Opens in a given state: a scrub preview (a share of the length), the More menu or Share open, a suggestion answered in full, the transcript let go of the time, or the sidebar’s labels shown. Giving one keeps the demo pointer off. - **className** (`string`): Extra class for the root. ## Accessibility - Landmarks and headings: the sidebar is an aside with a nav, the screen a main with an h1, the breadcrumb marks the current page, and the assistant is a labelled section with an h2. - The scrub bar is a role="slider" with its value as text ("02:08 of 08:24"): arrow keys step 5 s, Page Up and Down 30 s, Home and End go to either end. The volume is a native range input; play, mute, speed, casting and full screen are named buttons, with aria-pressed where they toggle. - The tabs are a tablist with arrow keys, Home and End. The transcript is a focusable ordered list; the current line has aria-current="time", and every timestamp is a button named "Play from 02:34". - The kebab menu and the composer’s settings are role="menu" with menuitem and menuitemcheckbox items: arrow keys move, Escape closes and returns to the button, a press outside closes them. Share opens a labelled dialog that Escape closes. - The assistant’s conversation is a role="log" (aria-live polite, aria-busy while streaming); the toast and the player’s status (playing, paused, sought) are polite live regions that speak on change, not on every tick. - Every control shows a :focus-visible ring. Reduced motion stills the figures, streams answers at once, scrolls the transcript without smoothing and turns the demo off. The scenes, avatars and the demo pointer are aria-hidden. ## Source ### session-review/session-review.tsx ```tsx // Copyright (c) 2026 Bruno Delorence. MIT License. 'use client'; import { useEffect, useEffectEvent, useRef, useState, useSyncExternalStore, type KeyboardEvent, } from 'react'; import { Assistant, tokenize, type Message } from './assistant'; import { COMMENTS, INSIGHTS, REPLIES, SESSION, START, SUGGESTIONS, SUMMARY, clock, replyTo, segmentAt, type Comment, type Session, } from './data'; import { DemoPointer, runDemo, type Point } from './demo-pointer'; import { AppMark, Icon, type IconName } from './icons'; import { Player } from './player'; import { Face } from './scene'; import { useAutoplay } from './use-autoplay'; import styles from './session-review.module.css'; /* * Session review: the screen a research team watches an interview on. A thin icon sidebar; the * study's breadcrumbs, the session's title, description and facts, with Share and a menu; the * recording (illustrated, with the researcher's picture-in-picture and a hover preview on the * scrub bar); tabs for the summary, the transcript, comments and insights; and an assistant * that answers questions about the recording. * * - One number is the time. A timer advances it while playing (four ticks a second, times the * speed; it holds while the screen is off-screen or the tab hidden), and everything reads it: * the scrub bar, the clocks, which figure speaks, the transcript's current line and phrase. * - The transcript lights the line being spoken and, inside it, the phrase (four words at a time) * being said, and keeps the line at the top of its box as time goes on. Scrolling it by hand * lets go of that until "Follow" brings it back. Every timestamp, in the transcript, the * summary, comments, insights and the assistant's answers, seeks the recording. * - The assistant streams canned answers token by token (data.ts) and can be folded into a rail * or closed; a button in the header brings it back. * - Layout is by container queries on the root: the full screen from 1100 px (945 px tall, the * tab's content scrolling inside), the assistant under the recording below that, and under * 640 px the sidebar turns into a bar across the top. * - While on screen and untouched, a demo pointer plays the recording, previews and seeks on the * scrub bar, jumps from a timestamp, asks the assistant and walks the tabs. Any real input * hands control to the reader. */ type Tab = 'summary' | 'transcript' | 'comments' | 'insights'; type Scheme = 'light' | 'dark' | 'system'; type PanelMode = 'open' | 'folded' | 'closed'; /** A state to open in, for docs and tests; giving one keeps the demo pointer off. */ export type SessionReviewState = { /** The scrub bar's hover preview, as a share of the length (0–1). */ preview?: number; /** A header popover open: the More menu, or Share. */ menu?: 'more' | 'share'; /** A suggestion already asked and answered in full: 'ideas', 'needs' or 'opportunities'. */ asked?: string; /** The transcript let go of the time (as after scrolling it by hand), with Follow showing. */ unfollowed?: boolean; /** The sidebar widened to show its labels. */ labels?: boolean; }; const TABS: { id: Tab; label: string }[] = [ { id: 'summary', label: 'Summary' }, { id: 'transcript', label: 'Transcript' }, { id: 'comments', label: 'Comments' }, { id: 'insights', label: 'Insights' }, ]; const NAV: { id: string; label: string; icon: IconName }[] = [ { id: 'search', label: 'Search', icon: 'search' }, { id: 'home', label: 'Home', icon: 'home' }, { id: 'studies', label: 'Studies', icon: 'studies' }, { id: 'calendar', label: 'Calendar', icon: 'calendar' }, { id: 'files', label: 'Files', icon: 'folder' }, { id: 'people', label: 'Participants', icon: 'people' }, ]; /** The assistant's name, and the app's. */ const ASSISTANT = 'Sorrel AI'; /** How often the clock ticks while playing, in ms. */ const TICK = 250; /** How many words a lit phrase holds. */ const PHRASE = 4; /** How long an answer takes per token, in ms. */ const STREAM = 38; function useReducedMotion() { return useSyncExternalStore( (change) => { const query = window.matchMedia('(prefers-reduced-motion: reduce)'); query.addEventListener('change', change); return () => query.removeEventListener('change', change); }, () => window.matchMedia('(prefers-reduced-motion: reduce)').matches, () => false, ); } export function SessionReview({ session = SESSION, defaultTime = START, defaultTab = 'transcript', assistant = 'open', onSeek, autoplay = true, colorScheme, defaultState, className = '', }: { /** The session on screen (data.ts has the type and the invented one). */ session?: Session; /** Where the recording opens, in seconds. */ defaultTime?: number; /** The tab that opens. */ defaultTab?: Tab; /** The assistant's panel at first: open, folded into a rail, or closed. */ assistant?: PanelMode; /** Called whenever the recording seeks, with the new time in seconds. */ onSeek?: (time: number) => void; /** While on screen and untouched, a demo pointer shows the main interactions. */ autoplay?: boolean; colorScheme?: Scheme; /** Opens in a given state (a preview, a menu, an answer…), with the demo pointer off. */ defaultState?: SessionReviewState; className?: string; }) { const { ref: root, playing: demoCan, take } = useAutoplay(6000); const reduced = useReducedMotion(); const duration = session.duration; // ——— The recording's clock ——— const [time, setTime] = useState(() => Math.min(Math.max(defaultTime, 0), duration)); const [playing, setPlaying] = useState(false); const [speed, setSpeed] = useState(1); const [preview, setPreview] = useState(defaultState?.preview ?? null); const onScreen = useRef(true); /** What the player last did, for screen readers: played, paused, sought. */ const [status, setStatus] = useState(''); useEffect(() => { const element = root.current; if (!element) return; const observer = new IntersectionObserver(([entry]) => { onScreen.current = entry.isIntersecting; }); observer.observe(element); return () => observer.disconnect(); }, [root]); useEffect(() => { if (!playing) return; const timer = window.setInterval(() => { if (!onScreen.current || document.hidden) return; setTime((now) => { const next = now + (TICK / 1000) * speed; if (next >= duration) { setPlaying(false); return duration; } return next; }); }, TICK); return () => window.clearInterval(timer); }, [playing, speed, duration]); const seek = (to: number) => { const next = Math.min(Math.max(to, 0), duration); setTime(next); setFollow(true); setJump((n) => n + 1); setStatus(`At ${clock(next)}`); onSeek?.(next); }; const toggle = () => { if (!playing && time >= duration) setTime(0); setStatus(playing ? `Paused at ${clock(time)}` : 'Playing'); setPlaying(!playing); }; const transcript = session.transcript; const current = segmentAt(transcript, time); const speaker = transcript[current]?.speaker ?? 'guest'; // ——— Header, menus, the sidebar's labels ——— const [tab, setTab] = useState(defaultTab); const [more, setMore] = useState(defaultState?.menu === 'more'); const [share, setShare] = useState(defaultState?.menu === 'share'); /** A menu that opens with the screen (defaultState) takes no focus: only one the reader opens. */ const quiet = useRef(defaultState?.menu !== undefined); const [shareAtTime, setShareAtTime] = useState(true); const [copied, setCopied] = useState(false); const [reviewed, setReviewed] = useState(false); const [described, setDescribed] = useState(false); const [wideNav, setWideNav] = useState(defaultState?.labels ?? false); const [toast, setToast] = useState<{ key: number; text: string } | null>(null); const moreButton = useRef(null); const shareButton = useRef(null); const moreMenu = useRef(null); const sharePop = useRef(null); const say = (text: string) => setToast({ key: Date.now(), text }); useEffect(() => { if (!toast) return; const timer = window.setTimeout(() => setToast(null), 2600); return () => window.clearTimeout(timer); }, [toast]); useEffect(() => { if (!more && !share) return; const outside = (event: PointerEvent) => { const target = event.target as Node; if ( moreMenu.current?.contains(target) || sharePop.current?.contains(target) || moreButton.current?.contains(target) || shareButton.current?.contains(target) ) return; setMore(false); setShare(false); }; document.addEventListener('pointerdown', outside); return () => document.removeEventListener('pointerdown', outside); }, [more, share]); useEffect(() => { if (more && !quiet.current) moreMenu.current?.querySelector('[role^="menuitem"]')?.focus(); }, [more]); useEffect(() => { if (share && !quiet.current) sharePop.current?.querySelector('input[type="checkbox"]')?.focus(); }, [share]); useEffect(() => { if (!copied) return; const timer = window.setTimeout(() => setCopied(false), 1800); return () => window.clearTimeout(timer); }, [copied]); const link = `https://sessions.example/s/u2-design${shareAtTime ? `?t=${Math.floor(time)}` : ''}`; // ——— The transcript follows the time ——— const [follow, setFollow] = useState(!defaultState?.unfollowed); /** Bumped by every seek, so seeking within the current line still brings it back to the top. */ const [jump, setJump] = useState(0); const list = useRef(null); const first = useRef(true); useEffect(() => { if (tab !== 'transcript' || !follow) return; const box = list.current; const line = box?.querySelector(`[data-index="${current}"]`); if (!box || !line) return; box.scrollTo({ top: line.offsetTop - box.offsetTop, behavior: first.current || reduced ? 'auto' : 'smooth', }); first.current = false; }, [current, follow, tab, reduced, jump]); useEffect(() => { first.current = true; }, [tab]); const letGo = () => setFollow(false); // ——— Comments ——— const [comments, setComments] = useState(COMMENTS); const [note, setNote] = useState(''); // ——— The assistant ——— const [panel, setPanel] = useState(assistant); const [messages, setMessages] = useState(() => { const asked = SUGGESTIONS.find((item) => item.id === defaultState?.asked); if (!asked) return []; const tokens = tokenize(REPLIES[asked.id]); return [ { id: 1, role: 'user', text: asked.label }, { id: 2, role: 'assistant', tokens, shown: tokens.length }, ]; }); const nextId = useRef(3); const last = messages.at(-1); const streaming = last?.role === 'assistant' && last.shown < last.tokens.length; const ask = (text: string, suggestion?: string, brief?: boolean) => { if (streaming) return; let parts = suggestion ? REPLIES[suggestion] : replyTo(text); if (brief) { const stamp = parts.findIndex((part) => typeof part !== 'string'); parts = [...parts.slice(0, stamp + 1), '.']; } const tokens = tokenize(parts); setMessages((list) => [ ...list, { id: nextId.current++, role: 'user', text }, { id: nextId.current++, role: 'assistant', tokens, shown: reduced ? tokens.length : 0 }, ]); }; useEffect(() => { if (!streaming) return; const timer = window.setInterval(() => { setMessages((list) => list.map((message, index) => index === list.length - 1 && message.role === 'assistant' ? { ...message, shown: Math.min(message.tokens.length, message.shown + 1) } : message, ), ); }, STREAM); return () => window.clearInterval(timer); }, [streaming]); // ——— The demo ——— const pointer = useRef(null); const demo = autoplay && !defaultState && demoCan && !reduced; const demoPreview = useEffectEvent((share: number | null) => setPreview(share)); const demoReset = useEffectEvent(() => { setMessages([]); setPlaying(false); setPreview(null); setTab('transcript'); setPanel('open'); setTime(Math.min(Math.max(defaultTime, 0), duration)); setFollow(true); }); const demoStop = useEffectEvent(() => setPreview(null)); useEffect(() => { const stage = root.current; const arrow = pointer.current; if (!demo || !stage || !arrow) return; const find = (selector: string) => stage.querySelector(selector); const middle = (element: HTMLElement, dx = 0, dy = 0): Point => { const rect = stage.getBoundingClientRect(); const scale = rect.width / stage.offsetWidth || 1; const box = element.getBoundingClientRect(); return { x: (box.left + box.width * (0.5 + dx) - rect.left) / scale, y: (box.top + box.height * (0.5 + dy) - rect.top) / scale, }; }; const shown = (element: HTMLElement) => { const box = element.getBoundingClientRect(); const scroller = element.closest('[data-scroll]')?.getBoundingClientRect(); if (!box.width) return false; return !scroller || (box.top >= scroller.top && box.bottom <= scroller.bottom); }; const stop = runDemo(stage, arrow, async ({ wait, glide, glyph }) => { const to = async (selector: string, ms = 650, dx = 0, dy = 0) => { const element = find(selector); if (!element || !shown(element)) return null; glyph('arrow'); await glide(middle(element, dx, dy), ms); return element; }; const press = async (selector: string, ms = 650) => { const element = await to(selector, ms); if (!element) return false; glyph('hand'); await wait(200); element.click(); return true; }; for (;;) { await wait(600); // Play. if (await press('[data-part="play"]', 900)) await wait(2600); // Preview a later moment on the scrub bar, then seek there. const bar = find('[data-part="scrub"]'); if (bar) { glyph('hand'); await glide(middle(bar, 0.32), 900); demoPreview(0.82); await wait(1300); await glide(middle(bar, 0.12), 700); demoPreview(0.62); await wait(900); bar.dispatchEvent(new CustomEvent('demo-seek', { detail: 0.62 })); demoPreview(null); await wait(2200); } // Jump back to a moment from its timestamp. if (await press('[data-part="timestamp"][data-at="345"]', 900)) await wait(2200); // Ask the assistant; follow a timestamp in its answer. if (await press('[data-part="suggestion"][data-id="ideas"]', 1000)) { await wait(4200); if (await press('[data-part="reply-time"]', 700)) await wait(2000); } // The other tabs. for (const id of ['insights', 'summary']) { if (await press(`[data-part="tab"][data-id="${id}"]`, 800)) await wait(1700); } if (await press('[data-part="tab"][data-id="transcript"]', 700)) await wait(1200); if (await press('[data-part="play"]', 900)) await wait(900); await to('[data-part="title"]', 1000); await wait(800); demoReset(); await wait(1500); } }); return () => { stop(); demoStop(); }; }, [demo, root]); // The demo seeks through an event on the scrub bar, so it shares the reader's path. useEffect(() => { const bar = root.current?.querySelector('[data-part="scrub"]'); if (!bar) return; const handle = (event: Event) => { const share = (event as CustomEvent).detail; setTime(share * duration); setFollow(true); }; bar.addEventListener('demo-seek', handle); return () => bar.removeEventListener('demo-seek', handle); }, [root, duration]); // ——— Pieces ——— const stamp = (at: number, extra?: string) => ( ); const onTabKey = (event: KeyboardEvent) => { const index = TABS.findIndex((item) => item.id === tab); let next = index; if (event.key === 'ArrowRight') next = (index + 1) % TABS.length; else if (event.key === 'ArrowLeft') next = (index - 1 + TABS.length) % TABS.length; else if (event.key === 'Home') next = 0; else if (event.key === 'End') next = TABS.length - 1; else return; event.preventDefault(); setTab(TABS[next].id); event.currentTarget.querySelectorAll('[role="tab"]')[next]?.focus(); }; const segmentEnd = transcript[current + 1]?.at ?? duration; const renderLine = (index: number) => { const line = transcript[index]; if (index !== current) return line.text; const words = line.text.split(' '); const share = Math.min(0.999, Math.max(0, (time - line.at) / (segmentEnd - line.at))); const start = Math.floor((share * words.length) / PHRASE) * PHRASE; const end = Math.min(words.length, start + PHRASE); const before = words.slice(0, start).join(' '); const after = words.slice(end).join(' '); return ( <> {before && `${before} `} {words.slice(start, end).join(' ')} {after && ` ${after}`} ); }; const navButton = (item: { id: string; label: string; icon: IconName }) => (
    • ); return (
    { if (event.pointerType !== 'touch') take(); }} >
    {wideNav && (

    {panel === 'closed' && ( )}
    {more && (
    { const items = [ ...(moreMenu.current?.querySelectorAll('[role^="menuitem"]') ?? []), ]; const index = items.indexOf(document.activeElement as HTMLElement); if (event.key === 'ArrowDown' || event.key === 'ArrowUp') { event.preventDefault(); const step = event.key === 'ArrowDown' ? 1 : -1; items[(index + step + items.length) % items.length]?.focus(); } else if (event.key === 'Escape') { setMore(false); moreButton.current?.focus(); } else if (event.key === 'Tab') setMore(false); }} >
    )}
    {share && (
    { if (event.key === 'Escape') { setShare(false); shareButton.current?.focus(); } }} >

    Share this session

    event.currentTarget.select()} />
    )}
    Date
    {session.date}
    Products
    {session.products}
    Company
    {session.company}
    User
    {session.guest.name}
    {TABS.map((item) => ( ))}
    {tab === 'transcript' && !follow && ( )}
    {tab === 'transcript' && (
      { if ( event.target === event.currentTarget && /^(Arrow(Up|Down)|Page(Up|Down)|Home|End| )$/.test(event.key) ) letGo(); }} > {transcript.map((line, index) => { const who = line.speaker === 'host' ? session.host : session.guest; return (
    1. {stamp(line.at)}

      {renderLine(index)}

      {line.speaker === 'host' ? ( {who.initials} ) : ( )} {who.name}
      2. ); })}
    )} {tab === 'summary' && (

    {SUMMARY.text}

    Key moments

      {SUMMARY.moments.map((moment) => (
    • {stamp(moment.at)} {moment.text}
      • ))}
    )} {tab === 'comments' && (
      {comments.map((comment) => (
    • {comment.who.initials}

      {comment.who.name} {comment.ago} {stamp(comment.at, styles.stampChip)}

      {comment.text}

      • ))}
    { event.preventDefault(); if (!note.trim()) return; setComments((list) => [ ...list, { id: `c${Date.now()}`, who: { name: 'Kai Moreno', initials: 'KM', role: 'Designer' }, at: Math.floor(time), text: note.trim(), ago: 'Just now', }, ]); setNote(''); }} > setNote(event.target.value)} placeholder={`Comment at ${clock(time)}`} aria-label={`Comment at ${clock(time)}`} />
    )} {tab === 'insights' && (
      {INSIGHTS.map((insight) => (
    • {insight.kind}

      {insight.title}

      {insight.quote}

      {stamp(insight.at, styles.stampChip)}
      • ))}
    )}
    {panel === 'open' && ( setMessages([])} onCollapse={() => setPanel('folded')} onClose={() => setPanel('closed')} /> )} {panel === 'folded' && (
    )}
    {toast && ( {toast.text} )}

    {status}

    ); } ``` ### session-review/player.tsx ```tsx // Copyright (c) 2026 Bruno Delorence. MIT License. 'use client'; import { useEffect, useRef, useState, type KeyboardEvent, type PointerEvent } from 'react'; import { clock } from './data'; import { Icon, PlayerGlyph } from './icons'; import { GuestScene, HostScene } from './scene'; import styles from './session-review.module.css'; /* * The recording's player. Nothing plays: the time is a number the screen owns and advances on * its own clock, and the picture is the illustrated scene of scene.tsx, which moves while * `playing`. The controls are real ones: * * - The scrub bar is a role="slider": hovering it shows a preview of that moment (a small copy of * the scene, leaning as she did then) with its time over the total; pressing or dragging seeks, * and the arrow keys step 5 s, Page Up / Down 30 s, Home and End to either end. * - The volume is a native range input with its speaker as a mute button; the speed button steps * through 1×, 1.5×, 2× and 0.5×; casting is a toggle; full screen is the browser's own. * - A press on the picture plays or pauses, and a large play button shows while paused. */ const SPEEDS = [1, 1.5, 2, 0.5]; export function Player({ time, duration, playing, speaker, preview, speed, onSpeed, onToggle, onSeek, onPreview, }: { time: number; duration: number; playing: boolean; /** Who is speaking now: their figure's mouth moves. */ speaker: 'host' | 'guest'; /** The hovered share of the scrub bar (0–1), or null; the demo can set it too. */ preview: number | null; /** The playback rate; the speed button steps it. */ speed: number; onSpeed: (speed: number) => void; onToggle: () => void; onSeek: (time: number) => void; onPreview: (share: number | null) => void; }) { const player = useRef(null); const bar = useRef(null); const [volume, setVolume] = useState(0.75); const [muted, setMuted] = useState(false); const [cast, setCast] = useState(false); const [full, setFull] = useState(false); const dragging = useRef(false); useEffect(() => { const change = () => setFull(document.fullscreenElement === player.current); document.addEventListener('fullscreenchange', change); return () => document.removeEventListener('fullscreenchange', change); }, []); const shareAt = (clientX: number) => { const box = bar.current?.getBoundingClientRect(); if (!box || !box.width) return 0; return Math.min(1, Math.max(0, (clientX - box.left) / box.width)); }; const onBarDown = (event: PointerEvent) => { if (event.button !== 0) return; dragging.current = true; event.currentTarget.setPointerCapture(event.pointerId); const share = shareAt(event.clientX); onSeek(share * duration); onPreview(share); }; const onBarMove = (event: PointerEvent) => { const share = shareAt(event.clientX); onPreview(share); if (dragging.current) onSeek(share * duration); }; const onBarUp = () => { dragging.current = false; }; const onBarKey = (event: KeyboardEvent) => { const step: Record = { ArrowRight: 5, ArrowUp: 5, ArrowLeft: -5, ArrowDown: -5, PageUp: 30, PageDown: -30, }; if (event.key in step) onSeek(time + step[event.key]); else if (event.key === 'Home') onSeek(0); else if (event.key === 'End') onSeek(duration); else return; event.preventDefault(); }; const played = time / duration; const hoverTime = preview === null ? null : preview * duration; const level = muted ? 0 : volume; return (
    {cast && Casting to Living room}
    {hoverTime !== null && preview !== null && ( )}
    { const next = Number(event.target.value) / 100; setVolume(next); setMuted(next === 0); }} /> {clock(time)}
    { if (!dragging.current) onPreview(null); }} onKeyDown={onBarKey} > {preview !== null && preview > played && ( )} {preview !== null && ( )}
    -{clock(duration - time)}
    ); } ``` ### session-review/assistant.tsx ```tsx // Copyright (c) 2026 Bruno Delorence. MIT License. 'use client'; import { useEffect, useRef, useState } from 'react'; import { SUGGESTIONS, clock, type ReplyPart } from './data'; import { AppMark, Icon } from './icons'; import styles from './session-review.module.css'; /* * The assistant's panel: ask the recording a question. Empty, it shows its mark, a headline and * three suggestions above the composer; once asked, the conversation takes the room. Answers are * canned (data.ts) and stream in token by token; every timestamp in an answer is a chip that * seeks the recording there. * * - The composer is a textarea: Enter sends, Shift+Enter breaks the line. The plus button adds * the current time as a reference, the sliders button opens a menu (a shorter answer, a new * chat), and the microphone fakes a dictation into the field. * - The two buttons at the top fold the panel into a rail, or close it; the screen keeps the rest. */ export type Message = | { id: number; role: 'user'; text: string } | { id: number; role: 'assistant'; tokens: ReplyPart[]; shown: number }; /** Splits an answer into the tokens it streams in: words with their spaces, and timestamps. */ export function tokenize(parts: ReplyPart[]): ReplyPart[] { return parts.flatMap((part) => typeof part === 'string' ? (part.match(/\s*\S+\s*/g) ?? [part]) : [part], ); } export function Assistant({ name, time, messages, streaming, onAsk, onSeek, onClear, onCollapse, onClose, }: { name: string; time: number; messages: Message[]; streaming: boolean; /** A question, typed or picked (a suggestion's id comes with its label); `brief` asks for a * shorter answer. */ onAsk: (text: string, suggestion?: string, brief?: boolean) => void; onSeek: (time: number) => void; onClear: () => void; onCollapse: () => void; onClose: () => void; }) { const [draft, setDraft] = useState(''); const [menu, setMenu] = useState(false); const [listening, setListening] = useState(false); const [brief, setBrief] = useState(false); const field = useRef(null); const log = useRef(null); const menuRef = useRef(null); const menuButton = useRef(null); // The conversation keeps its newest line in view as it streams. const last = messages.at(-1); const progress = last?.role === 'assistant' ? last.shown : messages.length; useEffect(() => { const element = log.current; if (element) element.scrollTop = element.scrollHeight; }, [messages.length, progress]); // The fake dictation: listens a moment, then writes a question in. useEffect(() => { if (!listening) return; const timer = window.setTimeout(() => { setDraft('What frustrates her most about research?'); setListening(false); field.current?.focus(); }, 1600); return () => window.clearTimeout(timer); }, [listening]); // The menu closes on a press outside it, or Escape. useEffect(() => { if (!menu) return; const outside = (event: globalThis.PointerEvent) => { const target = event.target as Node; if (!menuRef.current?.contains(target) && !menuButton.current?.contains(target)) setMenu(false); }; document.addEventListener('pointerdown', outside); menuRef.current?.querySelector('[role^="menuitem"]')?.focus(); return () => document.removeEventListener('pointerdown', outside); }, [menu]); const send = () => { const text = draft.trim(); if (!text || streaming) return; onAsk(text, undefined, brief); setDraft(''); }; const empty = messages.length === 0; return (
    {empty ? (

    {name}

    Solve your doubts in seconds

    Chat with the recording and get
    insights at the moment.

    ) : (
    {messages.map((message) => message.role === 'user' ? (

    {message.text}

    ) : (

    {message.tokens.slice(0, message.shown).map((token, index) => typeof token === 'string' ? ( token ) : ( ), )} {message.shown < message.tokens.length && (

    ), )}
    )} {empty && (
      {SUGGESTIONS.map((item) => (
      • ))}
    )}
    { event.preventDefault(); send(); }} >