refactor(ui): Phase 7 — strip chat/voice/journal/workspace/home surfaces

Frontend deletion phase of the MCP-first pivot. All in-app
conversational surfaces are gone — Claude/MCP is the assistant now.

Deleted views:
  ChatView, JournalView, WorkspaceView, HomeView

Deleted components:
  ChatPanel, ChatInputBar, ChatMessage, ChatStreamingBubble,
  ToolCallCard, ToolConfirmCard, WorkspaceChatWidget

Deleted composables + store:
  useVoiceRecorder, useVoiceAudio, useStreamingTts, stores/chat

Router changes:
  - / now redirects to /knowledge (was /journal)
  - dropped /chat, /chat/:id, /journal, /workspace/:projectId
  - /tasks still redirects to / (→ /knowledge)
  - /notes still redirects to /knowledge

KnowledgeView:
  - removed ChatPanel + ChatInputBar embeds
  - removed minichat floating widget + state + handlers
  - removed Chat link from today bar
  - removed `chatStore` driven auto-refresh-on-tool-call watch

App.vue:
  - removed useChatStore + startStatusPolling/stopStatusPolling
  - removed VAD ONNX preloader (voice subsystem dead)
  - removed visibilitychange listener (only did voice status re-check)
  - removed `c` single-key shortcut (focus chat / goto chat)
  - removed `g+c` two-key sequence (goto chat)
  - removed Chat section from shortcuts overlay
  - removed `.chat-page` / `.workspace-root` CSS overflow rule

AppHeader.vue:
  - removed useChatStore + status indicator (Ollama model status)
  - removed Chat / Journal nav links (desktop + mobile)

SettingsView.vue (4598 → 4079 lines):
  - removed Voice tab entirely
  - Notifications tab: dropped Push Notifications + Chat History
    + About sections (kept Email Notifications)
  - General tab: dropped Assistant (name + model pickers) +
    Model Management sections (kept Tasks + Timezone)
  - Profile tab: dropped Journal + Observations sections
  - VALID_TABS + tab list array no longer include "voice"
  - removed `loadVoiceTab()` activation trigger

Service worker (frontend/public/sw.js):
  - dropped push and notificationclick handlers (push subsystem
    only fired on internal generation completion, which is gone)
  - kept empty fetch handler as PWA installability shell

Script-level dead code (state refs, helper functions referencing
removed APIs) remains in SettingsView and stores/push.ts and
stores/settings.ts for now — Phase 8 backend deletion will clean
those up alongside the matching backend route removals.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/composables/useStreamingTts.ts

@@ -1,168 +0,0 @@
-import { ref, watch, computed } from 'vue'
-import type { Ref, ComputedRef } from 'vue'
-import { synthesiseSpeech } from '@/api/client'
-import { useVoiceAudio } from '@/composables/useVoiceAudio'
-
-/** Minimum stripped character count to bother synthesizing. */
-const MIN_CHARS = 3
-
-/** Matches sentence-terminal punctuation followed by whitespace or end-of-string. */
-const SENTENCE_BOUNDARY = /[.!?]+(?=\s|$)/
-
-function stripMarkdown(text: string): string {
-  return text
-    .replace(/```[\s\S]*?```/g, '')
-    .replace(/`[^`]+`/g, (m) => m.slice(1, -1))
-    .replace(/#{1,6}\s+/g, '')
-    .replace(/\*\*([^*]+)\*\*/g, '$1')
-    .replace(/\*([^*]+)\*/g, '$1')
-    .replace(/\[([^\]]+)\]\([^)]+\)/g, '$1')
-    .replace(/^\s*[-*+]\s+/gm, '')
-    .replace(/\n{2,}/g, ' ')
-    .trim()
-}
-
-/**
- * Extract completed sentences from `text` using SENTENCE_BOUNDARY.
- * Returns the sentences found and the unconsumed remainder.
- */
-function extractSentences(text: string): { sentences: string[]; remainder: string } {
-  const sentences: string[] = []
-  let remaining = text
-  let match: RegExpExecArray | null
-
-  while ((match = SENTENCE_BOUNDARY.exec(remaining)) !== null) {
-    const boundary = match.index + match[0].length
-    const sentence = remaining.slice(0, boundary).trim()
-    if (sentence) sentences.push(sentence)
-    remaining = remaining.slice(boundary)
-  }
-
-  return { sentences, remainder: remaining }
-}
-
-export interface UseStreamingTtsOptions {
-  streamingContent: Ref<string> | ComputedRef<string>
-  streaming: Ref<boolean> | ComputedRef<boolean>
-  enabled: Ref<boolean> | ComputedRef<boolean>
-}
-
-export interface UseStreamingTtsReturn {
-  /** True while any synthesis request is in-flight or audio is playing. */
-  speaking: ComputedRef<boolean>
-  /** Cancel all in-flight synthesis/playback and clear the queue. */
-  stop: () => void
-  /** Speak a complete text through the same sentence-chunking pipeline. */
-  speak: (text: string) => void
-}
-
-export function useStreamingTts(options: UseStreamingTtsOptions): UseStreamingTtsReturn {
-  const { streamingContent, streaming, enabled } = options
-  const audio = useVoiceAudio()
-
-  let sentenceBuffer = ''
-  let lastSeenLength = 0
-  let abortId = 0
-  let playQueue: Promise<void> = Promise.resolve()
-  const pendingCount = ref(0)
-
-  const speaking = computed(() => pendingCount.value > 0 || audio.playing.value)
-
-  function stop(): void {
-    abortId++
-    sentenceBuffer = ''
-    lastSeenLength = 0
-    playQueue = Promise.resolve()
-    audio.stop()
-    pendingCount.value = 0
-  }
-
-  async function enqueueSentence(sentence: string, myAbortId: number): Promise<void> {
-    const stripped = stripMarkdown(sentence)
-    if (stripped.length < MIN_CHARS) return
-
-    pendingCount.value++
-    let blob: Blob | null = null
-    try {
-      blob = await synthesiseSpeech(stripped)
-    } catch (e) {
-      const errMsg = e instanceof Error ? e.message : String(e)
-      console.warn('[StreamingTTS] Synthesis failed, retrying', {
-        chars: stripped.length,
-        preview: stripped.slice(0, 80),
-        error: errMsg,
-      })
-      try {
-        blob = await synthesiseSpeech(stripped)
-      } catch (e2) {
-        const errMsg2 = e2 instanceof Error ? e2.message : String(e2)
-        console.warn('[StreamingTTS] Retry failed, sentence dropped', {
-          chars: stripped.length,
-          preview: stripped.slice(0, 80),
-          error: errMsg2,
-        })
-      }
-    } finally {
-      pendingCount.value--
-    }
-
-    if (!blob) return
-
-    // Capture blob for the closure — TS can't narrow after async gap
-    const resolvedBlob = blob
-    playQueue = playQueue.then(async () => {
-      if (abortId !== myAbortId) return
-      await audio.play(resolvedBlob)
-    })
-  }
-
-  function dispatchBuffer(flush: boolean): void {
-    if (!enabled.value) return
-    const myAbortId = abortId
-    const { sentences, remainder } = extractSentences(sentenceBuffer)
-    sentenceBuffer = flush ? '' : remainder
-    for (const sentence of sentences) {
-      enqueueSentence(sentence, myAbortId)
-    }
-    if (flush && remainder.trim().length >= MIN_CHARS) {
-      enqueueSentence(remainder.trim(), myAbortId)
-    }
-  }
-
-  // Watch accumulating content — extract new characters since last check
-  watch(streamingContent, (newContent) => {
-    if (!enabled.value) return
-    const delta = newContent.slice(lastSeenLength)
-    lastSeenLength = newContent.length
-    sentenceBuffer += delta
-    dispatchBuffer(false)
-  })
-
-  // Watch streaming flag — stop on new message start, flush on end
-  watch(streaming, (isStreaming) => {
-    if (!enabled.value) return
-    if (isStreaming) {
-      // New message starting — cancel previous response's audio
-      stop()
-    } else {
-      // Stream ended — flush any remaining fragment
-      dispatchBuffer(true)
-      lastSeenLength = 0
-    }
-  })
-
-  function speak(text: string): void {
-    stop()
-    if (!text.trim()) return
-    const myAbortId = abortId
-    const { sentences, remainder } = extractSentences(text)
-    for (const sentence of sentences) {
-      enqueueSentence(sentence, myAbortId)
-    }
-    if (remainder.trim().length >= MIN_CHARS) {
-      enqueueSentence(remainder.trim(), myAbortId)
-    }
-  }
-
-  return { speaking, stop, speak }
-}

frontend/src/composables/useVoiceAudio.ts

@@ -1,72 +0,0 @@
-import { ref, readonly } from 'vue'
-
-const VOLUME_KEY = 'fa_voice_volume'
-
-// Shared volume across all instances — persisted to localStorage per device
-const _volume = ref<number>(parseFloat(localStorage.getItem(VOLUME_KEY) ?? '1.0'))
-
-export function useVoiceAudio() {
-  const playing = ref(false)
-  const isSupported = typeof AudioContext !== 'undefined' || typeof (window as unknown as Record<string, unknown>).webkitAudioContext !== 'undefined'
-
-  let audioCtx: AudioContext | null = null
-  let currentSource: AudioBufferSourceNode | null = null
-
-  function _getCtx(): AudioContext {
-    if (!audioCtx || audioCtx.state === 'closed') {
-      const Ctx = window.AudioContext ?? (window as unknown as Record<string, typeof AudioContext>).webkitAudioContext
-      audioCtx = new Ctx()
-    }
-    return audioCtx
-  }
-
-  async function play(blob: Blob): Promise<void> {
-    stop()
-    const ctx = _getCtx()
-    if (ctx.state === 'suspended') await ctx.resume()
-
-    const arrayBuffer = await blob.arrayBuffer()
-    const audioBuffer = await ctx.decodeAudioData(arrayBuffer)
-
-    const source = ctx.createBufferSource()
-    source.buffer = audioBuffer
-
-    const gain = ctx.createGain()
-    gain.gain.value = _volume.value
-    source.connect(gain)
-    gain.connect(ctx.destination)
-
-    currentSource = source
-    playing.value = true
-
-    return new Promise<void>((resolve) => {
-      source.onended = () => {
-        playing.value = false
-        currentSource = null
-        resolve()
-      }
-      source.start(0)
-    })
-  }
-
-  function stop(): void {
-    if (currentSource) {
-      try { currentSource.stop() } catch { /* already stopped */ }
-      currentSource = null
-    }
-    playing.value = false
-  }
-
-  return {
-    playing: readonly(playing),
-    volume: _volume,
-    isSupported,
-    play,
-    stop,
-  }
-}
-
-export function setVoiceVolume(v: number) {
-  _volume.value = Math.max(0, Math.min(1, v))
-  localStorage.setItem(VOLUME_KEY, String(_volume.value))
-}

frontend/src/composables/useVoiceRecorder.ts

@@ -1,93 +0,0 @@
-import { ref, readonly, type Ref } from 'vue'
-
-/**
- * Push-to-talk recorder wrapping the browser MediaRecorder API.
- *
- * Usage:
- *   const { recording, error, isSupported, startRecording, stopRecording } = useVoiceRecorder()
- *   await startRecording()
- *   const blob = await stopRecording()   // resolves with the recorded audio Blob
- */
-export function useVoiceRecorder() {
-  const recording = ref(false)
-  const error = ref<string | null>(null)
-  const isSupported = typeof MediaRecorder !== 'undefined' && !!navigator.mediaDevices?.getUserMedia
-
-  let mediaRecorder: MediaRecorder | null = null
-  let chunks: Blob[] = []
-  const streamRef = ref<MediaStream | null>(null)
-  let resolveStop: ((blob: Blob) => void) | null = null
-  let rejectStop: ((err: Error) => void) | null = null
-
-  async function startRecording(): Promise<void> {
-    error.value = null
-    if (!isSupported) {
-      error.value = 'Audio recording is not supported in this browser'
-      return
-    }
-    if (recording.value) return
-
-    try {
-      streamRef.value = await navigator.mediaDevices.getUserMedia({ audio: true })
-    } catch (e) {
-      error.value = 'Microphone access denied'
-      return
-    }
-
-    chunks = []
-    const mimeType = MediaRecorder.isTypeSupported('audio/webm;codecs=opus')
-      ? 'audio/webm;codecs=opus'
-      : MediaRecorder.isTypeSupported('audio/webm')
-        ? 'audio/webm'
-        : ''
-
-    mediaRecorder = mimeType ? new MediaRecorder(streamRef.value!, { mimeType }) : new MediaRecorder(streamRef.value!)
-
-    mediaRecorder.ondataavailable = (e) => {
-      if (e.data.size > 0) chunks.push(e.data)
-    }
-
-    mediaRecorder.onstop = () => {
-      const blob = new Blob(chunks, { type: mediaRecorder?.mimeType ?? 'audio/webm' })
-      chunks = []
-      streamRef.value?.getTracks().forEach((t) => t.stop())
-      streamRef.value = null
-      recording.value = false
-      resolveStop?.(blob)
-      resolveStop = null
-      rejectStop = null
-    }
-
-    mediaRecorder.onerror = () => {
-      recording.value = false
-      error.value = 'Recording error'
-      rejectStop?.(new Error('MediaRecorder error'))
-      resolveStop = null
-      rejectStop = null
-    }
-
-    mediaRecorder.start(100) // collect in 100ms chunks
-    recording.value = true
-  }
-
-  function stopRecording(): Promise<Blob> {
-    return new Promise((resolve, reject) => {
-      if (!mediaRecorder || !recording.value) {
-        reject(new Error('Not recording'))
-        return
-      }
-      resolveStop = resolve
-      rejectStop = reject
-      mediaRecorder.stop()
-    })
-  }
-
-  return {
-    recording: readonly(recording),
-    error: readonly(error),
-    isSupported,
-    startRecording,
-    stopRecording,
-    stream: readonly(streamRef) as Readonly<Ref<MediaStream | null>>,
-  }
-}