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client/src/App.css

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+#root {
+  width: 100%;
+  height: 100vh;
+  margin: 0;
+  padding: 0;
+}
+
+.app {
+  display: grid;
+  grid-template-columns: 2fr 1fr;
+  gap: 16px;
+  height: 100%;
+  padding: 16px;
+  background: #f5f5f5;
+}
+
+.left-panel,
+.right-panel {
+  background: #fff;
+  border-radius: 12px;
+  padding: 16px;
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
+  min-height: 0;
+}
+
+.panel {
+  border: 1px solid #e5e7eb;
+  border-radius: 10px;
+  padding: 12px;
+  background: #fafafa;
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  min-height: 0;
+}
+
+.panel-title {
+  font-weight: 700;
+  font-size: 16px;
+}
+
+.transcript-panel {
+  flex: 1 1 0;
+  min-height: 0;
+}
+
+.answer-panel {
+  flex: 0 0 auto;
+}
+
+.transcript-content,
+.answer-content {
+  background: #fff;
+  border-radius: 8px;
+  padding: 12px;
+  border: 1px solid #f0f0f0;
+  height: 100%;
+  overflow-y: auto;
+}
+
+.transcript-line {
+  display: grid;
+  grid-template-columns: 12px 1fr;
+  gap: 4px;
+  padding: 4px 0;
+  border-bottom: 1px solid #f4f4f4;
+  font-size: 14px;
+}
+
+.transcript-line:last-child {
+  border-bottom: none;
+}
+
+.transcript-line.live {
+  color: #111827;
+}
+
+.transcript-time {
+  color: #111827;
+  font-size: 12px;
+  text-align: left;
+}
+
+.transcript-text {
+  color: #111827;
+  font-weight: 600;
+}
+
+.answer-list {
+  list-style: decimal;
+  padding-left: 18px;
+  margin: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+  font-size: 14px;
+}
+
+.controls {
+  display: flex;
+  gap: 12px;
+}
+
+button {
+  border: none;
+  border-radius: 999px;
+  padding: 10px 18px;
+  font-weight: 600;
+  cursor: pointer;
+}
+
+.record-btn {
+  background: #e5e7eb;
+  color: #111827;
+}
+
+.record-btn.recording {
+  background: #ef4444;
+  color: #fff;
+  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.2);
+}
+
+.stop-btn {
+  background: #111827;
+  color: #fff;
+}
+
+.save-btn {
+  background: #2563eb;
+  color: #fff;
+}
+
+.meeting-list {
+  flex: 1;
+  border: 1px solid #f0f0f0;
+  border-radius: 10px;
+  padding: 12px;
+  overflow-y: auto;
+  background: #fafafa;
+}
+
+.meeting-item {
+  margin-bottom: 10px;
+}
+
+.meeting-button {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+  width: 100%;
+  background: transparent;
+  color: #111827;
+  text-align: left;
+  padding: 6px 8px;
+  border-radius: 8px;
+}
+
+.meeting-button:hover {
+  background: #f3f4f6;
+}
+
+.bullet {
+  font-size: 18px;
+  color: #111827;
+}
+
+.meeting-checkbox {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+  font-size: 14px;
+}
+
+.list-controls {
+  display: flex;
+  gap: 10px;
+  justify-content: flex-end;
+}
+
+.edit-btn {
+  background: #111827;
+  color: #fff;
+}
+
+.delete-btn {
+  background: #ef4444;
+  color: #fff;
+}
+
+.cancel-btn {
+  background: #e5e7eb;
+  color: #111827;
+}
+
+.placeholder {
+  color: #9ca3af;
+  font-size: 14px;
+}
+
+.error-banner {
+  background: #fee2e2;
+  color: #991b1b;
+  padding: 10px 12px;
+  border-radius: 8px;
+  font-size: 14px;
+}
+
+.hint {
+  font-size: 12px;
+  color: #6b7280;
+}
+
+button:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}

client/src/App.tsx

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+import { useEffect, useMemo, useRef, useState } from 'react'
+import './App.css'
+import TranscriptPanel from './components/TranscriptPanel'
+import AnswerPanel from './components/AnswerPanel'
+import MeetingList from './components/MeetingList'
+import {
+  createMeeting,
+  deleteMeetings,
+  endMeeting,
+  fetchAnswerSuggestions,
+  fetchMeeting,
+  fetchMeetings,
+  saveAnswers,
+  saveUtterance,
+} from './lib/api'
+
+function App() {
+  const [isRecording, setIsRecording] = useState(false)
+  const [isEditMode, setIsEditMode] = useState(false)
+  const [currentMeetingId, setCurrentMeetingId] = useState<number | null>(null)
+  const [transcriptLines, setTranscriptLines] = useState<
+    { id: number; ts: string; text: string; isFinal: boolean }[]
+  >([])
+  const [answerSuggestions, setAnswerSuggestions] = useState<string[]>([])
+  const [meetingsList, setMeetingsList] = useState<
+    { id: number; started_at: string; ended_at: string | null; title: string | null }[]
+  >([])
+  const [selectedMeetingIds, setSelectedMeetingIds] = useState<Set<number>>(
+    new Set()
+  )
+  const [errorMessage, setErrorMessage] = useState<string | null>(null)
+
+  const recognitionRef = useRef<SpeechRecognition | null>(null)
+  const liveTextRef = useRef('')
+  const lineIdRef = useRef(1)
+  const meetingIdRef = useRef<number | null>(null)
+  const isRecordingRef = useRef(false)
+  const lastResultAtRef = useRef<number>(Date.now())
+  const restartLockRef = useRef(false)
+
+  const hasSpeechRecognition = useMemo(() => {
+    return 'SpeechRecognition' in window || 'webkitSpeechRecognition' in window
+  }, [])
+
+  useEffect(() => {
+    fetchMeetings()
+      .then(setMeetingsList)
+      .catch((err) => setErrorMessage(err.message))
+  }, [])
+
+  useEffect(() => {
+    if (!isRecording) return
+    const intervalId = window.setInterval(() => {
+      if (!isRecordingRef.current) return
+      const now = Date.now()
+      if (now - lastResultAtRef.current > 4000) {
+        void safeRestartRecognition()
+      }
+    }, 2000)
+    return () => window.clearInterval(intervalId)
+  }, [isRecording])
+
+  const commitLiveIfAny = async () => {
+    if (!meetingIdRef.current) return
+    const text = liveTextRef.current.trim()
+    if (!text) return
+    const ts = new Date().toISOString()
+    setTranscriptLines((prev) => {
+      const last = prev[prev.length - 1]
+      if (last && !last.isFinal) {
+        return [
+          ...prev.slice(0, -1),
+          { ...last, text, ts, isFinal: true },
+        ]
+      }
+      return [...prev, { id: lineIdRef.current++, ts, text, isFinal: true }]
+    })
+    try {
+      await saveUtterance(meetingIdRef.current, text, ts)
+    } catch (err) {
+      setErrorMessage((err as Error).message)
+    }
+  }
+
+  const detectQuestion = (text: string) => {
+    const trimmed = text.trim()
+    if (!trimmed) return false
+    if (trimmed.includes('?')) return true
+    const patterns = [
+      '어때',
+      '할까',
+      '인가',
+      '있나',
+      '맞지',
+      '좋을까',
+      '생각은',
+      '어떻게',
+      '왜',
+      '뭐',
+      '언제',
+      '어디',
+      '누가',
+    ]
+    return patterns.some((pattern) => trimmed.includes(pattern))
+  }
+
+  const startRecognition = () => {
+    const SpeechRecognitionConstructor =
+      window.SpeechRecognition || window.webkitSpeechRecognition
+
+    if (!SpeechRecognitionConstructor) {
+      setErrorMessage('이 브라우저에서는 STT를 지원하지 않습니다. Chrome을 사용해 주세요.')
+      return
+    }
+
+    const recognition = new SpeechRecognitionConstructor()
+    recognition.lang = 'ko-KR'
+    recognition.interimResults = true
+    recognition.continuous = true
+
+    recognition.onresult = (event) => {
+      lastResultAtRef.current = Date.now()
+      let interim = ''
+      for (let i = event.resultIndex; i < event.results.length; i += 1) {
+        const result = event.results[i]
+        const text = result[0].transcript
+        if (result.isFinal) {
+          handleFinalTranscript(text)
+        } else {
+          interim += text
+        }
+      }
+      const interimText = interim.trim()
+      if (interimText) {
+        liveTextRef.current = interimText
+        setTranscriptLines((prev) => {
+          const last = prev[prev.length - 1]
+          if (last && !last.isFinal) {
+            return [...prev.slice(0, -1), { ...last, text: interimText }]
+          }
+          return [
+            ...prev,
+            {
+              id: lineIdRef.current++,
+              ts: new Date().toISOString(),
+              text: interimText,
+              isFinal: false,
+            },
+          ]
+        })
+      }
+    }
+
+    recognition.onerror = () => {
+      setErrorMessage('음성 인식 중 오류가 발생했습니다.')
+    }
+
+    recognition.onend = () => {
+      void commitLiveIfAny()
+      liveTextRef.current = ''
+      if (isRecordingRef.current) {
+        window.setTimeout(() => {
+          void safeRestartRecognition()
+        }, 200)
+      } else {
+        setIsRecording(false)
+      }
+    }
+
+    recognitionRef.current = recognition
+    recognition.start()
+  }
+
+  const handleFinalTranscript = async (text: string) => {
+    if (!meetingIdRef.current) return
+    const trimmed = text.trim()
+    if (!trimmed) return
+    lastResultAtRef.current = Date.now()
+    const ts = new Date().toISOString()
+    liveTextRef.current = ''
+    let nextLines: { id: number; ts: string; text: string; isFinal: boolean }[] = []
+    setTranscriptLines((prev) => {
+      const last = prev[prev.length - 1]
+      if (last && !last.isFinal) {
+        nextLines = [
+          ...prev.slice(0, -1),
+          { ...last, text: trimmed, ts, isFinal: true },
+        ]
+        return nextLines
+      }
+      nextLines = [
+        ...prev,
+        { id: lineIdRef.current++, ts, text: trimmed, isFinal: true },
+      ]
+      return nextLines
+    })
+
+    try {
+      await saveUtterance(meetingIdRef.current, trimmed, ts)
+    } catch (err) {
+      setErrorMessage((err as Error).message)
+    }
+
+    if (detectQuestion(trimmed)) {
+      try {
+        const context = nextLines.slice(-20).map((line) => line.text)
+        const result = await fetchAnswerSuggestions(context, trimmed)
+        setAnswerSuggestions(result.suggestions)
+        await saveAnswers(meetingIdRef.current, trimmed, result.suggestions)
+      } catch (err) {
+        setErrorMessage((err as Error).message)
+      }
+    }
+  }
+
+  const handleStart = async () => {
+    setErrorMessage(null)
+    try {
+      const result = await createMeeting(new Date().toISOString())
+      meetingIdRef.current = result.id
+      setCurrentMeetingId(result.id)
+      lineIdRef.current = 1
+      setTranscriptLines([])
+      setAnswerSuggestions([])
+      setIsRecording(true)
+      isRecordingRef.current = true
+      lastResultAtRef.current = Date.now()
+      startRecognition()
+    } catch (err) {
+      setErrorMessage((err as Error).message)
+    }
+  }
+
+  const handleStop = async () => {
+    if (!meetingIdRef.current) return
+    setErrorMessage(null)
+    recognitionRef.current?.stop()
+    await commitLiveIfAny()
+    liveTextRef.current = ''
+    setIsRecording(false)
+    isRecordingRef.current = false
+    try {
+      await endMeeting(meetingIdRef.current, new Date().toISOString())
+      const list = await fetchMeetings()
+      setMeetingsList(list)
+    } catch (err) {
+      setErrorMessage((err as Error).message)
+    }
+  }
+
+  const safeRestartRecognition = async () => {
+    if (!recognitionRef.current || restartLockRef.current) return
+    restartLockRef.current = true
+    try {
+      recognitionRef.current.stop()
+      recognitionRef.current.start()
+      lastResultAtRef.current = Date.now()
+    } catch {
+      // ignore restart errors
+    } finally {
+      window.setTimeout(() => {
+        restartLockRef.current = false
+      }, 500)
+    }
+  }
+
+  const handleSave = async () => {
+    if (!meetingIdRef.current) return
+    setErrorMessage(null)
+    try {
+      await endMeeting(meetingIdRef.current, new Date().toISOString())
+    } catch (err) {
+      setErrorMessage((err as Error).message)
+    }
+  }
+
+  const handleSelectMeeting = async (id: number) => {
+    setErrorMessage(null)
+    try {
+      const data = await fetchMeeting(id)
+      meetingIdRef.current = id
+      setCurrentMeetingId(id)
+      lineIdRef.current = 1
+      setTranscriptLines(
+        data.utterances.map((utterance) => ({
+          id: lineIdRef.current++,
+          ts: utterance.ts,
+          text: utterance.text,
+          isFinal: true,
+        }))
+      )
+      const lastAnswer = data.answers[data.answers.length - 1]
+      setAnswerSuggestions(lastAnswer?.suggestions || [])
+    } catch (err) {
+      setErrorMessage((err as Error).message)
+    }
+  }
+
+  const handleToggleEdit = () => {
+    setIsEditMode(true)
+  }
+
+  const handleCancelEdit = () => {
+    setIsEditMode(false)
+    setSelectedMeetingIds(new Set())
+  }
+
+  const handleToggleSelect = (id: number) => {
+    const next = new Set(selectedMeetingIds)
+    if (next.has(id)) {
+      next.delete(id)
+    } else {
+      next.add(id)
+    }
+    setSelectedMeetingIds(next)
+  }
+
+  const handleDelete = async () => {
+    if (selectedMeetingIds.size === 0) return
+    setErrorMessage(null)
+    const ids = Array.from(selectedMeetingIds)
+    try {
+      await deleteMeetings(ids)
+      const updated = meetingsList.filter((meeting) => !selectedMeetingIds.has(meeting.id))
+      setMeetingsList(updated)
+      setSelectedMeetingIds(new Set())
+      setIsEditMode(false)
+      if (currentMeetingId && ids.includes(currentMeetingId)) {
+        setCurrentMeetingId(null)
+        meetingIdRef.current = null
+        setTranscriptLines([])
+        setAnswerSuggestions([])
+      }
+    } catch (err) {
+      setErrorMessage((err as Error).message)
+    }
+  }
+
+  return (
+    <div className="app">
+      <div className="left-panel">
+        {errorMessage && <div className="error-banner">{errorMessage}</div>}
+        <TranscriptPanel transcriptLines={transcriptLines} />
+        <AnswerPanel suggestions={answerSuggestions} />
+        <div className="controls">
+          <button
+            type="button"
+            className={`record-btn ${isRecording ? 'recording' : ''}`}
+            onClick={handleStart}
+            disabled={isRecording || !hasSpeechRecognition}
+          >
+            녹음
+          </button>
+          <button type="button" className="stop-btn" onClick={handleStop} disabled={!isRecording}>
+            중지
+          </button>
+          <button type="button" className="save-btn" onClick={handleSave} disabled={!currentMeetingId}>
+            저장
+          </button>
+        </div>
+        {!hasSpeechRecognition && (
+          <div className="hint">Chrome에서만 Web Speech API가 안정적으로 동작합니다.</div>
+        )}
+      </div>
+      <div className="right-panel">
+        <div className="panel-title">대화 리스트</div>
+        <MeetingList
+          meetings={meetingsList}
+          isEditMode={isEditMode}
+          selectedIds={selectedMeetingIds}
+          onToggleSelect={handleToggleSelect}
+          onSelectMeeting={handleSelectMeeting}
+        />
+        <div className="list-controls">
+          {!isEditMode ? (
+            <button type="button" className="edit-btn" onClick={handleToggleEdit}>
+              편집
+            </button>
+          ) : (
+            <>
+              <button type="button" className="delete-btn" onClick={handleDelete}>
+                삭제
+              </button>
+              <button type="button" className="cancel-btn" onClick={handleCancelEdit}>
+                취소
+              </button>
+            </>
+          )}
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default App

client/src/assets/react.svg

@@ -0,0 +1 @@
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client/src/components/AnswerPanel.tsx

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+type Props = {
+  suggestions: string[]
+}
+
+export default function AnswerPanel({ suggestions }: Props) {
+  return (
+    <div className="panel answer-panel">
+      <div className="panel-title">대답</div>
+      <div className="answer-content">
+        {suggestions.length === 0 ? (
+          <div className="placeholder">질문이 감지되면 답변 후보가 표시됩니다.</div>
+        ) : (
+          <ul className="answer-list">
+            {suggestions.map((item, idx) => (
+              <li key={`${item}-${idx}`}>{item}</li>
+            ))}
+          </ul>
+        )}
+      </div>
+    </div>
+  )
+}

client/src/components/MeetingList.tsx

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+import type { MeetingSummary } from '../lib/api'
+
+type Props = {
+  meetings: MeetingSummary[]
+  isEditMode: boolean
+  selectedIds: Set<number>
+  onToggleSelect: (id: number) => void
+  onSelectMeeting: (id: number) => void
+}
+
+function formatDate(value: string) {
+  const date = new Date(value)
+  return date.toLocaleString('ko-KR', {
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit',
+    hour: '2-digit',
+    minute: '2-digit',
+    second: '2-digit',
+  })
+}
+
+export default function MeetingList({
+  meetings,
+  isEditMode,
+  selectedIds,
+  onToggleSelect,
+  onSelectMeeting,
+}: Props) {
+  return (
+    <div className="meeting-list">
+      {meetings.length === 0 && (
+        <div className="placeholder">저장된 대화가 없습니다.</div>
+      )}
+      {meetings.map((meeting) => (
+        <div key={meeting.id} className="meeting-item">
+          {isEditMode ? (
+            <label className="meeting-checkbox">
+              <input
+                type="checkbox"
+                checked={selectedIds.has(meeting.id)}
+                onChange={() => onToggleSelect(meeting.id)}
+              />
+              <span>{formatDate(meeting.started_at)}</span>
+            </label>
+          ) : (
+            <button
+              className="meeting-button"
+              type="button"
+              onClick={() => onSelectMeeting(meeting.id)}
+            >
+              <span className="bullet">•</span>
+              <span>{formatDate(meeting.started_at)}</span>
+            </button>
+          )}
+        </div>
+      ))}
+    </div>
+  )
+}

client/src/components/TranscriptPanel.tsx

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+type TranscriptLine = {
+  id: number
+  ts: string
+  text: string
+  isFinal: boolean
+}
+
+type Props = {
+  transcriptLines: TranscriptLine[]
+}
+
+export default function TranscriptPanel({ transcriptLines }: Props) {
+  return (
+    <div className="panel transcript-panel">
+      <div className="panel-title">대화/STT</div>
+      <div className="transcript-content">
+        {transcriptLines.length === 0 && (
+          <div className="placeholder">대화를 시작하면 STT 로그가 표시됩니다.</div>
+        )}
+        {transcriptLines.map((line) => (
+          <div
+            key={line.id}
+            className={`transcript-line ${line.isFinal ? '' : 'live'}`.trim()}
+          >
+            <span className="transcript-time">-</span>
+            <span className="transcript-text">{line.text}</span>
+          </div>
+        ))}
+      </div>
+    </div>
+  )
+}

client/src/index.css

@@ -0,0 +1,24 @@
+:root {
+  font-family: 'Apple SD Gothic Neo', 'Malgun Gothic', system-ui, sans-serif;
+  line-height: 1.4;
+  font-weight: 400;
+  color: #111827;
+  background-color: #f5f5f5;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+body {
+  margin: 0;
+  min-width: 320px;
+  min-height: 100vh;
+}
+
+button {
+  font-family: inherit;
+}

client/src/lib/api.ts

@@ -0,0 +1,99 @@
+export type MeetingSummary = {
+  id: number
+  started_at: string
+  ended_at: string | null
+  title: string | null
+}
+
+export type Utterance = {
+  id: number
+  meeting_id: number
+  speaker: string
+  text: string
+  ts: string
+}
+
+export type AnswerRecord = {
+  id: number
+  meeting_id: number
+  question_text: string
+  suggestions: string[]
+  created_at: string
+}
+
+async function request<T>(url: string, options?: RequestInit): Promise<T> {
+  const res = await fetch(url, {
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    ...options,
+  })
+  if (!res.ok) {
+    const data = await res.json().catch(() => ({}))
+    const message = data.message || '서버 요청에 실패했습니다.'
+    throw new Error(message)
+  }
+  return (await res.json()) as T
+}
+
+export async function fetchMeetings(): Promise<MeetingSummary[]> {
+  return request<MeetingSummary[]>('/api/meetings')
+}
+
+export async function fetchMeeting(id: number): Promise<{
+  meeting: MeetingSummary
+  utterances: Utterance[]
+  answers: AnswerRecord[]
+}> {
+  return request(`/api/meetings/${id}`)
+}
+
+export async function createMeeting(started_at: string): Promise<{ id: number }> {
+  return request('/api/meetings', {
+    method: 'POST',
+    body: JSON.stringify({ started_at }),
+  })
+}
+
+export async function endMeeting(
+  id: number,
+  ended_at: string,
+  title?: string
+): Promise<{ ok: true }> {
+  return request(`/api/meetings/${id}/end`, {
+    method: 'POST',
+    body: JSON.stringify({ ended_at, title }),
+  })
+}
+
+export async function saveUtterance(id: number, text: string, ts: string) {
+  return request(`/api/meetings/${id}/utterances`, {
+    method: 'POST',
+    body: JSON.stringify({ text, ts }),
+  })
+}
+
+export async function saveAnswers(
+  id: number,
+  question_text: string,
+  suggestions: string[]
+) {
+  return request(`/api/meetings/${id}/answers`, {
+    method: 'POST',
+    body: JSON.stringify({ question_text, suggestions }),
+  })
+}
+
+export async function deleteMeetings(ids: number[]) {
+  return request('/api/meetings', {
+    method: 'DELETE',
+    body: JSON.stringify({ ids }),
+  })
+}
+
+export async function fetchAnswerSuggestions(context: string[], question: string) {
+  return request<{ suggestions: string[] }>('/api/answer_suggestions', {
+    method: 'POST',
+    body: JSON.stringify({ context, question }),
+  })
+}

client/src/main.tsx

@@ -0,0 +1,10 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import './index.css'
+import App from './App.tsx'
+
+createRoot(document.getElementById('root')!).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)

client/src/types/speech.d.ts

@@ -0,0 +1,24 @@
+interface SpeechRecognitionEvent extends Event {
+  resultIndex: number
+  results: SpeechRecognitionResultList
+}
+
+interface SpeechRecognition extends EventTarget {
+  continuous: boolean
+  interimResults: boolean
+  lang: string
+  onresult: ((event: SpeechRecognitionEvent) => void) | null
+  onerror: ((event: Event) => void) | null
+  onend: (() => void) | null
+  start: () => void
+  stop: () => void
+}
+
+interface SpeechRecognitionConstructor {
+  new (): SpeechRecognition
+}
+
+interface Window {
+  SpeechRecognition?: SpeechRecognitionConstructor
+  webkitSpeechRecognition?: SpeechRecognitionConstructor
+}