Merge remote-tracking branch 'origin/main' into fix/engine-execution-evidence-1717

2026-09-01 18:47:30 +05:30
parent fb724b8633 a30b71666c
commit 88e3e71fd7
30 changed files with 337 additions and 30 deletions
@@ -25,9 +25,11 @@ the frozen-backend fallback mirror it for their toolchains.

 ### Fixed

+- Subtitle rows now provide 100 ms timing steppers and flag adjacent overlaps without requiring precise timeline dragging (#1710)
 - Repair-sync failures now retain uv's final dependency error instead of reporting only an opaque exit status (#1705)
 - YouTube ingest now retries yt-dlp's transient “page needs to be reloaded” response (#1706)
 - Dictation model readiness now follows the live Hugging Face cache selected in Settings (#1707)
+- Desktop-contained backends now exit when their owning app disappears instead of surviving as stale port-3900 processes (#1707)

 ## [0.5.1] — 2026-08-28

@@ -0,0 +1,34 @@
+"""Terminate a desktop-contained backend when its owning shell disappears."""
+from __future__ import annotations
+
+import os
+import sys
+import threading
+from typing import BinaryIO, Callable
+
+
+def _watch_parent_pipe(reader: BinaryIO, exit_process: Callable[[int], None]) -> None:
+    """Block until the desktop-owned stdin pipe closes, then exit immediately."""
+    try:
+        while reader.read(1):
+            pass
+    except (OSError, ValueError):
+        # A broken or already-closed parent-owned pipe is equivalent to EOF.
+        pass
+    exit_process(0)
+
+
+def arm_desktop_parent_watchdog() -> bool:
+    """Use stdin EOF as an unforgeable parent-liveness signal for desktop runs."""
+    if os.environ.get("OMNIVOICE_DESKTOP_CONTAINED") != "1":
+        return False
+    reader = getattr(sys.stdin, "buffer", None)
+    if reader is None:
+        return False
+    threading.Thread(
+        target=_watch_parent_pipe,
+        args=(reader, os._exit),
+        name="desktop-parent-watchdog",
+        daemon=True,
+    ).start()
+    return True
@@ -77,6 +77,7 @@ os.environ.setdefault("FOR_DISABLE_CONSOLE_CTRL_HANDLER", "1")
 # (utils.hf_progress.SafeFileWrapper — same wrapper the patched hub tqdm
 # already uses for its own fp.)
 from utils.hf_progress import SafeFileWrapper as _SafeStdio  # noqa: E402
+from core.parent_liveness import arm_desktop_parent_watchdog  # noqa: E402

 # Force UTF-8 stdio before wrapping (#1155): on Windows the spawned backend's
 # stdout defaults to cp1252, and any library that prints user text (kittentts
@@ -89,6 +90,11 @@ for _stream in (sys.stdout, sys.stderr):
    except Exception:  # noqa: BLE001 — pythonw/frozen builds may lack reconfigure
        pass

+# The desktop keeps the backend's stdin pipe open for its own lifetime. EOF is
+# therefore a stable ownership signal that survives PID reuse and lets a child
+# terminate even when the shell crashes before its normal process-tree teardown.
+arm_desktop_parent_watchdog()
+
 if not getattr(sys.stdout, "_is_safe_wrapper", False):
    sys.stdout = _SafeStdio(sys.stdout)
 if not getattr(sys.stderr, "_is_safe_wrapper", False):
@@ -652,7 +652,12 @@ pub(crate) fn spawn_backend<R: tauri::Runtime>(
            ]);
        }
    }
-    cmd.stdout(Stdio::piped()).stderr(Stdio::piped());
+    // Keep stdin piped but unwritten. The backend's parent-liveness watchdog
+    // blocks on it; desktop exit closes the handle and the child terminates,
+    // including on macOS where parent death alone does not reap descendants.
+    cmd.stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped());
    let mut contained = match crate::tools::spawn_process_tree(&mut cmd) {
        Ok(c) => {
            log::info!(
@@ -10,16 +10,19 @@ import {
  Scissors,
  Merge,
  MoreHorizontal,
+  Minus,
  Plus,
  Sparkles,
 } from 'lucide-react';
 import { formatTime } from '../utils/format';
 import { LANG_CODES } from '../utils/languages';
+import { MIN_SEG_DUR } from '../utils/timeline';
 import { Menu, Button, Badge } from '../ui';
 import VoiceSelector from './VoiceSelector';

 const CHAR_BUDGET_RATIO = 1.3;
 const SENTENCE_END = /[.!?。！？]/;
+const TIME_EPSILON = 1e-9;

 function rowClass(isActive, isDone, selected, isPlaying, timelineSelected) {
  return `segment-row${isActive ? ' segment-active' : ''}${isDone ? ' segment-done' : ''}${selected ? ' segment-selected' : ''}${isPlaying ? ' segment-playing' : ''}${timelineSelected ? ' segment-timeline-selected' : ''}`;
@@ -85,6 +88,7 @@ function DubSegmentRow({
  onDirect,
  onSeek,
  timelineSelected,
+  hasOverlap,
 }) {
  const { t } = useTranslation();
  const textInputRef = useRef(null);
@@ -188,7 +192,10 @@ function DubSegmentRow({
  const commitTime = (edge) => (e) => {
    const v = parseTime(e.target.value);
    const current = seg[edge];
-    const inRange = edge === 'start' ? v >= 0 && v < seg.end : v > seg.start;
+    const inRange =
+      edge === 'start'
+        ? v >= 0 && v <= seg.end - MIN_SEG_DUR + TIME_EPSILON
+        : v >= seg.start + MIN_SEG_DUR - TIME_EPSILON;
    if (v == null || !inRange) {
      e.target.value = formatTime(current);
      return;
@@ -204,6 +211,21 @@ function DubSegmentRow({
    });
  };

+  const nudgeTime = (edge, delta) => {
+    const current = seg[edge];
+    const limit = edge === 'start' ? seg.end - MIN_SEG_DUR : seg.start + MIN_SEG_DUR;
+    const next = +(
+      edge === 'start'
+        ? Math.max(0, Math.min(limit, current + delta))
+        : Math.max(limit, current + delta)
+    ).toFixed(3);
+    if (Math.abs(next - current) <= 1e-3) return;
+    onMoveResize(seg.id, {
+      start: edge === 'start' ? next : seg.start,
+      end: edge === 'end' ? next : seg.end,
+    });
+  };
+
  const handleTextKeyDown = (e) => {
    if ((e.ctrlKey || e.metaKey) && (e.key === 'd' || e.key === 'D')) {
      e.preventDefault();
@@ -247,30 +269,39 @@ function DubSegmentRow({
        title={t('segment.select_title')}
      />
      <span className="segment-time flex flex-col min-w-0 overflow-hidden tabular-nums">
+        {['start', 'end'].map((edge) => (
+          <span className="seg-time-stepper" key={`${edge}-${seg.id}-${seg[edge]}`}>
+            <button
+              type="button"
+              onClick={() => nudgeTime(edge, -0.1)}
+              disabled={disabled || (edge === 'start' && seg.start <= 0)}
+              aria-label={t(`segment.time_nudge_${edge}_earlier`)}
+            >
+              <Minus size={10} />
+            </button>
+            <input
+              type="text"
+              className="seg-time-input"
+              defaultValue={formatTime(seg[edge])}
+              disabled={disabled}
+              title={t(
+                edge === 'start' ? 'segment.time_edit_title' : 'segment.time_edit_end_title',
+              )}
+              onClick={(e) => e.stopPropagation()}
+              onKeyDown={timeKeyDown(edge)}
+              onBlur={commitTime(edge)}
+            />
+            <button
+              type="button"
+              onClick={() => nudgeTime(edge, 0.1)}
+              disabled={disabled}
+              aria-label={t(`segment.time_nudge_${edge}_later`)}
+            >
+              <Plus size={10} />
+            </button>
+          </span>
+        ))}
        <span className="flex items-baseline gap-[2px] min-w-0">
-          <input
-            type="text"
-            className="seg-time-input"
-            defaultValue={formatTime(seg.start)}
-            key={`start-${seg.id}-${seg.start}`}
-            disabled={disabled}
-            title={t('segment.time_edit_title')}
-            onClick={(e) => e.stopPropagation()}
-            onKeyDown={timeKeyDown('start')}
-            onBlur={commitTime('start')}
-          />
-          <span className="text-[var(--chrome-fg-muted)]">–</span>
-          <input
-            type="text"
-            className="seg-time-input"
-            defaultValue={formatTime(seg.end)}
-            key={`end-${seg.id}-${seg.end}`}
-            disabled={disabled}
-            title={t('segment.time_edit_end_title')}
-            onClick={(e) => e.stopPropagation()}
-            onKeyDown={timeKeyDown('end')}
-            onBlur={commitTime('end')}
-          />
          {seg.speed && seg.speed !== 1.0 && (
            <span
              className="text-[0.52rem] ml-[1px]"
@@ -280,6 +311,11 @@ function DubSegmentRow({
            </span>
          )}
        </span>
+        {hasOverlap && (
+          <span className="seg-overlap-warning" title={t('timeline.overlap_warning')}>
+            <AlertCircle size={9} /> {t('timeline.overlap_warning')}
+          </span>
+        )}
        {fitBadge && (
          <span
            className="text-[0.48rem] mt-[1px] inline-flex items-center gap-[1px]"
@@ -6,8 +6,8 @@ import { Table, Select } from '../ui';
 import { useAppStore } from '../store';
 import { visibleMergeAvailability } from '../utils/segmentParts';

-const BASE_ROW_HEIGHT = 26;
-const ROW_HEIGHT_WITH_ORIG = 40;
+const BASE_ROW_HEIGHT = 48;
+const ROW_HEIGHT_WITH_ORIG = 62;

 const COLUMNS = [
  { key: 'time', width: 50 },
@@ -228,6 +228,11 @@ export default function DubSegmentTable({
      // Merge operates on source neighbors. Hide the action when a filter
      // hides that neighbor so the user cannot mutate an unseen subtitle.
      const { canMerge, canMergePrev } = visibleMergeAvailability(segs, fl, seg);
+      const previous = segs[absoluteIndex - 1];
+      const next = segs[absoluteIndex + 1];
+      const hasOverlap =
+        (previous && Number(previous.end) > Number(seg.start) + 0.001) ||
+        (next && Number(seg.end) > Number(next.start) + 0.001);
      return (
        <DubSegmentRow
          seg={seg}
@@ -238,6 +243,7 @@ export default function DubSegmentTable({
          isDone={isDone}
          isPlaying={isPlaying}
          timelineSelected={timelineSelected}
+          hasOverlap={hasOverlap}
          previewLoading={previewId === seg.id}
          selected={sel && sel.has(seg.id)}
          canMerge={canMerge}
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "مكبر الصوت - اكتب اسمًا (لم يتم اكتشاف أي نسخ للكتابة)",
    "time_edit_title": "انقر لتعديل وقت البدء (m:ss.s). أدخل للالتزام، Esc للإلغاء.",
    "time_edit_end_title": "انقر لتعديل وقت الانتهاء (m:ss.s). أدخل للالتزام، Esc للإلغاء.",
+    "time_nudge_start_earlier": "حرّك وقت البدء 0.1 ثانية إلى وقت أبكر",
+    "time_nudge_start_later": "حرّك وقت البدء 0.1 ثانية إلى وقت لاحق",
+    "time_nudge_end_earlier": "حرّك وقت الانتهاء 0.1 ثانية إلى وقت أبكر",
+    "time_nudge_end_later": "حرّك وقت الانتهاء 0.1 ثانية إلى وقت لاحق",
    "fit_fits": "يناسب",
    "fit_fits_title": "يتناسب الصوت ذو المعدل الطبيعي داخل الفتحة.",
    "fit_overflows": "الفائض +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Sprecher – Geben Sie einen Namen ein (keine Diarisierungsklone erkannt)",
    "time_edit_title": "Klicken Sie hier, um die Startzeit (m:ss.s) zu bearbeiten. Geben Sie zum Festschreiben die Eingabetaste ein, zum Abbrechen die Esc-Taste.",
    "time_edit_end_title": "Klicken Sie hier, um die Endzeit (m:ss.s) zu bearbeiten. Geben Sie zum Festschreiben die Eingabetaste ein, zum Abbrechen die Esc-Taste.",
+    "time_nudge_start_earlier": "Startzeit um 0,1 Sekunden vorverlegen",
+    "time_nudge_start_later": "Startzeit um 0,1 Sekunden nach hinten verschieben",
+    "time_nudge_end_earlier": "Endzeit um 0,1 Sekunden vorverlegen",
+    "time_nudge_end_later": "Endzeit um 0,1 Sekunden nach hinten verschieben",
    "fit_fits": "Passt",
    "fit_fits_title": "Audio mit natürlicher Geschwindigkeit passt in den Steckplatz.",
    "fit_overflows": "Überläufe +{{seconds}}s",
@@ -1466,6 +1466,10 @@
    "speaker_title_custom": "Speaker — type a name (no diarization clones detected)",
    "time_edit_title": "Click to edit start time (m:ss.s). Enter to commit, Esc to cancel.",
    "time_edit_end_title": "Click to edit end time (m:ss.s). Enter to commit, Esc to cancel.",
+    "time_nudge_start_earlier": "Move start time 0.1 seconds earlier",
+    "time_nudge_start_later": "Move start time 0.1 seconds later",
+    "time_nudge_end_earlier": "Move end time 0.1 seconds earlier",
+    "time_nudge_end_later": "Move end time 0.1 seconds later",
    "qc_verify": "Verify",
    "qc_verify_title": "Second-pass ASR heard: \"{{heard}}\" — re-listen or re-dub this line.",
    "fit_fits": "Fits",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Orador: escriba un nombre (no se detectaron clones de diarización)",
    "time_edit_title": "Haga clic para editar la hora de inicio (m:ss.s). Ingrese para confirmar, Esc para cancelar.",
    "time_edit_end_title": "Haga clic para editar la hora de finalización (m:ss.s). Ingrese para confirmar, Esc para cancelar.",
+    "time_nudge_start_earlier": "Adelantar la hora de inicio 0,1 segundos",
+    "time_nudge_start_later": "Retrasar la hora de inicio 0,1 segundos",
+    "time_nudge_end_earlier": "Adelantar la hora de fin 0,1 segundos",
+    "time_nudge_end_later": "Retrasar la hora de fin 0,1 segundos",
    "fit_fits": "Se adapta",
    "fit_fits_title": "El audio de velocidad natural cabe dentro de la ranura.",
    "fit_overflows": "Se desborda +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Haut-parleur : saisissez un nom (aucun clone de diarisation détecté)",
    "time_edit_title": "Cliquez pour modifier l'heure de début (m:ss.s). Entrez pour valider, Esc pour annuler.",
    "time_edit_end_title": "Cliquez pour modifier l'heure de fin (m:ss.s). Entrez pour valider, Esc pour annuler.",
+    "time_nudge_start_earlier": "Avancer le début de 0,1 seconde",
+    "time_nudge_start_later": "Reculer le début de 0,1 seconde",
+    "time_nudge_end_earlier": "Avancer la fin de 0,1 seconde",
+    "time_nudge_end_later": "Reculer la fin de 0,1 seconde",
    "fit_fits": "Convient",
    "fit_fits_title": "L'audio à débit naturel s'adapte à l'intérieur de la fente.",
    "fit_overflows": "Débordements +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "स्पीकर - एक नाम टाइप करें (कोई डायराइज़ेशन क्लोन नहीं पाया गया)",
    "time_edit_title": "प्रारंभ समय (m:ss.s) संपादित करने के लिए क्लिक करें। प्रतिबद्ध करने के लिए दर्ज करें, रद्द करने के लिए Esc।",
    "time_edit_end_title": "समाप्ति समय (m:ss.s) संपादित करने के लिए क्लिक करें। प्रतिबद्ध करने के लिए दर्ज करें, रद्द करने के लिए Esc।",
+    "time_nudge_start_earlier": "आरंभ समय को 0.1 सेकंड पहले करें",
+    "time_nudge_start_later": "आरंभ समय को 0.1 सेकंड बाद करें",
+    "time_nudge_end_earlier": "समाप्ति समय को 0.1 सेकंड पहले करें",
+    "time_nudge_end_later": "समाप्ति समय को 0.1 सेकंड बाद करें",
    "fit_fits": "फिट बैठता है",
    "fit_fits_title": "प्राकृतिक दर वाला ऑडियो स्लॉट के अंदर फ़िट हो जाता है।",
    "fit_overflows": "अतिप्रवाह +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Pembicara — ketikkan nama (tidak ada klon diarisasi yang terdeteksi)",
    "time_edit_title": "Klik untuk mengedit waktu mulai (m:ss.s). Enter untuk melakukan, Esc untuk membatalkan.",
    "time_edit_end_title": "Klik untuk mengedit waktu selesai (m:ss.s). Enter untuk melakukan, Esc untuk membatalkan.",
+    "time_nudge_start_earlier": "Majukan waktu mulai 0,1 detik",
+    "time_nudge_start_later": "Mundurkan waktu mulai 0,1 detik",
+    "time_nudge_end_earlier": "Majukan waktu selesai 0,1 detik",
+    "time_nudge_end_later": "Mundurkan waktu selesai 0,1 detik",
    "fit_fits": "Cocok",
    "fit_fits_title": "Audio dengan kecepatan alami pas di dalam slot.",
    "fit_overflows": "Meluap +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Altoparlante: digita un nome (nessun clone di diarizzazione rilevato)",
    "time_edit_title": "Fare clic per modificare l'ora di inizio (m:ss.s). Invio per confermare, Esc per annullare.",
    "time_edit_end_title": "Fare clic per modificare l'ora di fine (m:ss.s). Invio per confermare, Esc per annullare.",
+    "time_nudge_start_earlier": "Anticipa l’inizio di 0,1 secondi",
+    "time_nudge_start_later": "Posticipa l’inizio di 0,1 secondi",
+    "time_nudge_end_earlier": "Anticipa la fine di 0,1 secondi",
+    "time_nudge_end_later": "Posticipa la fine di 0,1 secondi",
    "fit_fits": "Adatto",
    "fit_fits_title": "L'audio a velocità naturale si adatta all'interno dello slot.",
    "fit_overflows": "Overflow +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "スピーカー — 名前を入力します (ダイアライゼーション クローンは検出されません)。",
    "time_edit_title": "クリックして開始時刻 (分:ss.s) を編集します。 Enter を押してコミットし、Esc を押してキャンセルします。",
    "time_edit_end_title": "クリックして終了時刻 (分:ss.s) を編集します。 Enter を押してコミットし、Esc を押してキャンセルします。",
+    "time_nudge_start_earlier": "開始時刻を0.1秒早める",
+    "time_nudge_start_later": "開始時刻を0.1秒遅らせる",
+    "time_nudge_end_earlier": "終了時刻を0.1秒早める",
+    "time_nudge_end_later": "終了時刻を0.1秒遅らせる",
    "fit_fits": "適合",
    "fit_fits_title": "ナチュラルレートのオーディオがスロット内に収まります。",
    "fit_overflows": "オーバーフロー +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "발표자 - 이름을 입력하세요(분할 클론이 감지되지 않음)",
    "time_edit_title": "시작 시간(m:ss.s)을 편집하려면 클릭하세요. 커밋하려면 Enter를, 취소하려면 Esc를 누르세요.",
    "time_edit_end_title": "종료 시간(m:ss.s)을 편집하려면 클릭하세요. 커밋하려면 Enter를, 취소하려면 Esc를 누르세요.",
+    "time_nudge_start_earlier": "시작 시간을 0.1초 앞당기기",
+    "time_nudge_start_later": "시작 시간을 0.1초 늦추기",
+    "time_nudge_end_earlier": "종료 시간을 0.1초 앞당기기",
+    "time_nudge_end_later": "종료 시간을 0.1초 늦추기",
    "fit_fits": "적합",
    "fit_fits_title": "자연스러운 속도의 오디오가 슬롯에 맞습니다.",
    "fit_overflows": "오버플로 +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Spreker — typ een naam (geen dagboekklonen gedetecteerd)",
    "time_edit_title": "Klik om de starttijd te bewerken (m:ss.s). Enter om vast te leggen, Esc om te annuleren.",
    "time_edit_end_title": "Klik om de eindtijd te bewerken (m:ss.s). Enter om vast te leggen, Esc om te annuleren.",
+    "time_nudge_start_earlier": "Starttijd 0,1 seconde vervroegen",
+    "time_nudge_start_later": "Starttijd 0,1 seconde uitstellen",
+    "time_nudge_end_earlier": "Eindtijd 0,1 seconde vervroegen",
+    "time_nudge_end_later": "Eindtijd 0,1 seconde uitstellen",
    "fit_fits": "Past",
    "fit_fits_title": "Audio met natuurlijke snelheid past in de sleuf.",
    "fit_overflows": "Overstromen +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Głośnik — wpisz nazwę (nie wykryto klonów diaryzacji)",
    "time_edit_title": "Kliknij, aby edytować czas rozpoczęcia (m:ss.s). Enter, aby zatwierdzić, Esc, aby anulować.",
    "time_edit_end_title": "Kliknij, aby edytować czas zakończenia (m:ss.s). Enter, aby zatwierdzić, Esc, aby anulować.",
+    "time_nudge_start_earlier": "Przesuń czas rozpoczęcia o 0,1 s wcześniej",
+    "time_nudge_start_later": "Przesuń czas rozpoczęcia o 0,1 s później",
+    "time_nudge_end_earlier": "Przesuń czas zakończenia o 0,1 s wcześniej",
+    "time_nudge_end_later": "Przesuń czas zakończenia o 0,1 s później",
    "fit_fits": "Pasuje",
    "fit_fits_title": "Naturalny dźwięk mieści się w gnieździe.",
    "fit_overflows": "Przepełnienia +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Palestrante — digite um nome (nenhum clone de diarização detectado)",
    "time_edit_title": "Clique para editar a hora de início (m:ss.s). Enter para confirmar, Esc para cancelar.",
    "time_edit_end_title": "Clique para editar a hora de término (m:ss.s). Enter para confirmar, Esc para cancelar.",
+    "time_nudge_start_earlier": "Adiantar o início em 0,1 segundo",
+    "time_nudge_start_later": "Atrasar o início em 0,1 segundo",
+    "time_nudge_end_earlier": "Adiantar o fim em 0,1 segundo",
+    "time_nudge_end_later": "Atrasar o fim em 0,1 segundo",
    "fit_fits": "Serve",
    "fit_fits_title": "Áudio de taxa natural cabe dentro do slot.",
    "fit_overflows": "Estouro +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Спикер — введите имя (клоны диаризизации не обнаружены)",
    "time_edit_title": "Нажмите, чтобы изменить время начала (м:сс.с). Enter для фиксации, Esc для отмены.",
    "time_edit_end_title": "Нажмите, чтобы изменить время окончания (м:сс.с). Enter для фиксации, Esc для отмены.",
+    "time_nudge_start_earlier": "Сдвинуть начало на 0,1 секунды раньше",
+    "time_nudge_start_later": "Сдвинуть начало на 0,1 секунды позже",
+    "time_nudge_end_earlier": "Сдвинуть окончание на 0,1 секунды раньше",
+    "time_nudge_end_later": "Сдвинуть окончание на 0,1 секунды позже",
    "fit_fits": "Подходит",
    "fit_fits_title": "Звук естественной скорости помещается в слот.",
    "fit_overflows": "Переполнение +{{seconds}}с",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Högtalare – skriv ett namn (inga diariseringskloner upptäcktes)",
    "time_edit_title": "Klicka för att redigera starttid (m:ss.s). Enter för att begå, Esc för att avbryta.",
    "time_edit_end_title": "Klicka för att redigera sluttid (m:ss.s). Enter för att begå, Esc för att avbryta.",
+    "time_nudge_start_earlier": "Flytta starttiden 0,1 sekunder tidigare",
+    "time_nudge_start_later": "Flytta starttiden 0,1 sekunder senare",
+    "time_nudge_end_earlier": "Flytta sluttiden 0,1 sekunder tidigare",
+    "time_nudge_end_later": "Flytta sluttiden 0,1 sekunder senare",
    "fit_fits": "Passar",
    "fit_fits_title": "Naturligt ljud passar in i kortplatsen.",
    "fit_overflows": "Bräddar +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "ผู้พูด — พิมพ์ชื่อ (ตรวจไม่พบโคลนไดอะไรเซชัน)",
    "time_edit_title": "คลิกเพื่อแก้ไขเวลาเริ่มต้น (m:ss.s) เข้าสู่เพื่อกระทำ Esc เพื่อยกเลิก",
    "time_edit_end_title": "คลิกเพื่อแก้ไขเวลาสิ้นสุด (m:ss.s) เข้าสู่เพื่อกระทำ Esc เพื่อยกเลิก",
+    "time_nudge_start_earlier": "เลื่อนเวลาเริ่มเร็วขึ้น 0.1 วินาที",
+    "time_nudge_start_later": "เลื่อนเวลาเริ่มช้าลง 0.1 วินาที",
+    "time_nudge_end_earlier": "เลื่อนเวลาสิ้นสุดเร็วขึ้น 0.1 วินาที",
+    "time_nudge_end_later": "เลื่อนเวลาสิ้นสุดช้าลง 0.1 วินาที",
    "fit_fits": "พอดี",
    "fit_fits_title": "เสียงที่มีอัตราธรรมชาติพอดีกับช่อง",
    "fit_overflows": "โอเวอร์โฟลว์ +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Konuşmacı — bir ad yazın (günlük oluşturma klonu algılanmadı)",
    "time_edit_title": "Başlangıç saatini (m:ss.s) düzenlemek için tıklayın. Taahhüt etmek için Enter, iptal etmek için Esc.",
    "time_edit_end_title": "Bitiş saatini (m:ss.s) düzenlemek için tıklayın. Taahhüt etmek için Enter, iptal etmek için Esc.",
+    "time_nudge_start_earlier": "Başlangıç zamanını 0,1 saniye erkene al",
+    "time_nudge_start_later": "Başlangıç zamanını 0,1 saniye ileri al",
+    "time_nudge_end_earlier": "Bitiş zamanını 0,1 saniye erkene al",
+    "time_nudge_end_later": "Bitiş zamanını 0,1 saniye ileri al",
    "fit_fits": "uyar",
    "fit_fits_title": "Doğal oranlı ses yuvanın içine sığar.",
    "fit_overflows": "Taşmalar +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Доповідач — введіть ім’я (клонів діаризації не виявлено)",
    "time_edit_title": "Клацніть, щоб змінити час початку (хв:сс.с). Enter, щоб прийняти, Esc, щоб скасувати.",
    "time_edit_end_title": "Клацніть, щоб змінити час завершення (хв:сс.с). Enter, щоб прийняти, Esc, щоб скасувати.",
+    "time_nudge_start_earlier": "Пересунути початок на 0,1 секунди раніше",
+    "time_nudge_start_later": "Пересунути початок на 0,1 секунди пізніше",
+    "time_nudge_end_earlier": "Пересунути завершення на 0,1 секунди раніше",
+    "time_nudge_end_later": "Пересунути завершення на 0,1 секунди пізніше",
    "fit_fits": "Підходить",
    "fit_fits_title": "Аудіо з природною швидкістю поміщається в слот.",
    "fit_overflows": "Переповнення +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "Người nói - nhập tên (không phát hiện thấy bản sao nhật ký)",
    "time_edit_title": "Bấm để chỉnh sửa thời gian bắt đầu (m:ss.s). Enter để cam kết, Esc để hủy.",
    "time_edit_end_title": "Bấm để chỉnh sửa thời gian kết thúc (m:ss.s). Enter để cam kết, Esc để hủy.",
+    "time_nudge_start_earlier": "Đưa thời gian bắt đầu sớm hơn 0,1 giây",
+    "time_nudge_start_later": "Đưa thời gian bắt đầu muộn hơn 0,1 giây",
+    "time_nudge_end_earlier": "Đưa thời gian kết thúc sớm hơn 0,1 giây",
+    "time_nudge_end_later": "Đưa thời gian kết thúc muộn hơn 0,1 giây",
    "fit_fits": "Phù hợp",
    "fit_fits_title": "Âm thanh tốc độ tự nhiên vừa vặn bên trong khe cắm.",
    "fit_overflows": "Tràn +{{seconds}}s",
@@ -1153,6 +1153,10 @@
    "speaker_title_custom": "说话人 — 输入名称（未检测到分离克隆）",
    "time_edit_title": "单击可编辑开始时间 (m:ss.s)。 Enter 提交，Esc 取消。",
    "time_edit_end_title": "单击可编辑结束时间 (m:ss.s)。 Enter 提交，Esc 取消。",
+    "time_nudge_start_earlier": "将开始时间提前 0.1 秒",
+    "time_nudge_start_later": "将开始时间延后 0.1 秒",
+    "time_nudge_end_earlier": "将结束时间提前 0.1 秒",
+    "time_nudge_end_later": "将结束时间延后 0.1 秒",
    "fit_fits": "适合",
    "fit_fits_title": "自然速率音频适合插槽内。",
    "fit_overflows": "溢出 +{{seconds}}s",
@@ -1194,6 +1194,10 @@
    "speaker_title_custom": "揚聲器 — 輸入名稱（未偵測到二值化複製）",
    "time_edit_title": "按一下可編輯開始時間 (m:ss.s)。 Enter 提交，Esc 取消。",
    "time_edit_end_title": "按一下可編輯結束時間 (m:ss.s)。 Enter 提交，Esc 取消。",
+    "time_nudge_start_earlier": "將開始時間提前 0.1 秒",
+    "time_nudge_start_later": "將開始時間延後 0.1 秒",
+    "time_nudge_end_earlier": "將結束時間提前 0.1 秒",
+    "time_nudge_end_later": "將結束時間延後 0.1 秒",
    "fit_fits": "適合",
    "fit_fits_title": "自然速率音訊適合插槽內。",
    "fit_overflows": "溢出 +{{seconds}}s",
@@ -3990,6 +3990,39 @@ html[data-window='widget'] body:has(.capture-pill) {
  outline-offset: 1px;
  background: var(--chrome-hover-bg);
 }
+.seg-time-stepper {
+  display: grid;
+  grid-template-columns: 18px 42px 18px;
+  align-items: center;
+  gap: 2px;
+}
+.seg-time-stepper button {
+  width: 18px;
+  height: 18px;
+  padding: 0;
+  border: 1px solid var(--chrome-border);
+  border-radius: 3px;
+  background: var(--chrome-surface-raised);
+  color: var(--chrome-fg-muted);
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+}
+.seg-time-stepper button:hover:not(:disabled) {
+  color: var(--chrome-fg);
+  border-color: var(--chrome-accent);
+}
+.seg-overlap-warning {
+  display: flex;
+  align-items: center;
+  gap: 2px;
+  color: var(--color-danger, #fb4934);
+  font-size: 0.5rem;
+  line-height: 1.1;
+  overflow: hidden;
+  white-space: nowrap;
+  text-overflow: ellipsis;
+}
 .seg-speaker-input {
  width: 100%;
  min-width: 0;
@@ -4061,7 +4094,7 @@ html[data-window='widget'] body:has(.capture-pill) {
   default flex layout to use this template — eliminates the column-
   drift bug where the time pill bled into the text column. */
 .segment-table {
-  --seg-grid-cols: 18px 64px 70px minmax(0, 1fr) 44px 60px 40px 44px;
+  --seg-grid-cols: 18px 82px 70px minmax(0, 1fr) 44px 60px 40px 44px;
 }

 /* Narrow windows: shrink the fixed rails so the text column keeps real
@@ -4069,13 +4102,13 @@ html[data-window='widget'] body:has(.capture-pill) {
   window instead of overflowing it. */
@media (max-width: 1100px) {
  .segment-table {
-    --seg-grid-cols: 16px 54px 56px minmax(0, 1fr) 38px 52px 34px 38px;
+    --seg-grid-cols: 16px 82px 56px minmax(0, 1fr) 38px 52px 34px 38px;
  }
 }

@media (max-width: 760px) {
  .segment-table {
-    --seg-grid-cols: 14px 48px minmax(0, 1fr) 34px 48px 34px;
+    --seg-grid-cols: 14px 82px minmax(0, 1fr) 34px 48px 34px;
  }
  /* Speaker + gain rails collapse entirely below tablet width. */
  .dub-segment-table__header > :nth-child(3),
@@ -83,6 +83,52 @@ describe('DubSegmentRow timing fields', () => {
    expect(props.onEditField).not.toHaveBeenCalled();
  });

+  it('nudges either edge by 100 ms with accessible controls', () => {
+    const props = makeProps();
+    render(<DubSegmentRow {...props} />);
+
+    const decrement = screen.getAllByRole('button', { name: /0\.1 seconds earlier/ });
+    const increment = screen.getAllByRole('button', { name: /0\.1 seconds later/ });
+    fireEvent.click(decrement[0]);
+    fireEvent.click(increment[1]);
+
+    expect(props.onMoveResize).toHaveBeenNthCalledWith(1, 's1', { start: 0.9, end: 3 });
+    expect(props.onMoveResize).toHaveBeenNthCalledWith(2, 's1', { start: 1, end: 3.1 });
+  });
+
+  it('preserves the timeline minimum duration for typed and stepped edits', () => {
+    const props = makeProps();
+    render(<DubSegmentRow {...props} />);
+    const start = timeFields()[0];
+
+    fireEvent.change(start, { target: { value: '2.8' } });
+    fireEvent.blur(start);
+    expect(props.onMoveResize).not.toHaveBeenCalled();
+
+    const nearLimit = makeProps({ seg: { id: 's1', start: 2.7, end: 3, text: 'x' } });
+    render(<DubSegmentRow {...nearLimit} />);
+    fireEvent.click(screen.getAllByRole('button', { name: /start time 0\.1 seconds later/ })[1]);
+    expect(nearLimit.onMoveResize).not.toHaveBeenCalled();
+  });
+
+  it('accepts an exact 300 ms boundary despite decimal rounding', () => {
+    const props = makeProps({ seg: { id: 's1', start: 1, end: 3.3, text: 'x' } });
+    render(<DubSegmentRow {...props} />);
+    const start = timeFields()[0];
+
+    fireEvent.change(start, { target: { value: '3.0' } });
+    fireEvent.blur(start);
+
+    expect(props.onMoveResize).toHaveBeenCalledWith('s1', { start: 3, end: 3.3 });
+  });
+
+  it('surfaces an adjacent overlap beside the timing controls', () => {
+    render(<DubSegmentRow {...makeProps({ hasOverlap: true })} />);
+    expect(
+      screen.getByText('Overlaps an adjacent segment — both lines will play together'),
+    ).toBeInTheDocument();
+  });
+
  it('accepts raw seconds as well as m:ss.s', () => {
    const props = makeProps();
    render(<DubSegmentRow {...props} />);
@@ -0,0 +1,55 @@
+import io
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+def test_parent_pipe_eof_exits_cleanly():
+    from core.parent_liveness import _watch_parent_pipe
+
+    exits = []
+    _watch_parent_pipe(io.BytesIO(b""), exits.append)
+    assert exits == [0]
+
+
+def test_parent_pipe_ignores_bytes_until_eof():
+    from core.parent_liveness import _watch_parent_pipe
+
+    exits = []
+    _watch_parent_pipe(io.BytesIO(b"keepalive"), exits.append)
+    assert exits == [0]
+
+
+def test_watchdog_is_disabled_outside_desktop(monkeypatch):
+    from core.parent_liveness import arm_desktop_parent_watchdog
+
+    monkeypatch.delenv("OMNIVOICE_DESKTOP_CONTAINED", raising=False)
+    assert arm_desktop_parent_watchdog() is False
+
+
+def test_desktop_child_exits_when_parent_closes_stdin():
+    env = os.environ.copy()
+    env["OMNIVOICE_DESKTOP_CONTAINED"] = "1"
+    child = subprocess.Popen(
+        [
+            sys.executable,
+            "-c",
+            "from core.parent_liveness import arm_desktop_parent_watchdog; "
+            "arm_desktop_parent_watchdog(); print('ready', flush=True); "
+            "__import__('time').sleep(30)",
+        ],
+        stdin=subprocess.PIPE,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        env=env,
+        cwd=Path(__file__).parents[3] / "backend",
+        text=True,
+    )
+    try:
+        assert child.stdout.readline().strip() == "ready"
+        child.stdin.close()
+        assert child.wait(timeout=3) == 0
+    finally:
+        if child.poll() is None:
+            child.kill()
+            child.wait()