feat(desktop): send meeting transcript segments and preset prompt edits to the phone

The phone draws a meeting from its transcript segments before the edited
transcript, so desktop edits, auto-polish and diarization never showed there.
Every desktop transcript change now rebuilds the meeting's segments from its
[MM:SS] [speaker] lines and trims the rest; the line parser moves to
@d3ro/core/meeting-transcript and the meeting view uses it too.

Prompt edits of the four desktop presets that exist on the phone update the
server preset row (a reset restores its default; {{targetLanguage}} is sent
as English, the only target on both sides), and edits made on another desktop
come back. The free-prompt preset has no phone counterpart and stays local.

apps/desktop/src/renderer/components/meeting/MeetingDetailTabs.tsx

@@ -2,6 +2,7 @@
 // Modern AI Meeting Studio: Dual-Canvas Split View (Transcript + AI Minutes & Granola Notepad)
 
 import React, { useState, useEffect, useCallback, useMemo, useRef } from 'react'
+import { parseTranscriptLines } from '@d3ro/core/meeting-transcript'
 import {
   Box,
   Tabs,
@@ -54,33 +55,14 @@ function parseSegments(
   rawTranscript: string | null,
   editedTranscript: string | null,
 ): Array<{ id: string; timestamp: number; text: string; edited: boolean; speaker?: string }> {
-  const source = editedTranscript || rawTranscript || ''
-  const regex = /^\[(\d{2}):(\d{2})\]\s*(?:\[([^\]]+)\]\s*)?(.+)$/
-  return source
-    .split('\n')
-    .filter((line) => line.trim())
-    .map((line, idx) => {
-      const m = regex.exec(line.trim())
-      if (m) {
-        const min = parseInt(m[1], 10)
-        const sec = parseInt(m[2], 10)
-        const speaker = m[3] || undefined
-        const text = m[4]
-        return {
-          id: `seg-${idx}`,
-          timestamp: (min * 60 + sec) * 1000,
-          text,
-          edited: false,
-          speaker,
-        }
-      }
-      return {
-        id: `seg-${idx}`,
-        timestamp: idx * 4000,
-        text: line.trim(),
-        edited: false,
-      }
-    })
+  // 줄 ↔ 구간 변환은 core 정본을 쓴다 — 서버 transcripts 구간도 같은 규칙으로 만들어진다.
+  return parseTranscriptLines(editedTranscript || rawTranscript).map((line, idx) => ({
+    id: `seg-${idx}`,
+    timestamp: line.timestampMs,
+    text: line.text,
+    edited: false,
+    speaker: line.speaker ?? undefined,
+  }))
 }
 
 // Extract Action items from documents