feat: schedule mobile notification quiet hours (Closes #1392)

frontend/dashboard.css

@@ -264,6 +264,9 @@ textarea { resize: vertical; min-height: 120px; }
 .app-badge-control { min-height:44px; }
 .push-update-control { min-height:44px; }
 .offline-work-controls input { width:20px; height:20px; }
+.push-quiet-hours-times { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:10px; width:100%; }
+.push-quiet-hours-times label { min-width:0; }
+.offline-work-controls .push-quiet-hours-times input { box-sizing:border-box; width:100%; min-width:0; height:44px; }
 .offline-work-controls button { min-height:44px; }
 .offline-today-readiness { display:flex; gap:8px; align-items:center; flex-wrap:wrap; }
 .offline-today-readiness[hidden] { display:none; }

frontend/index.html

@@ -224,6 +224,12 @@
             <button class="secondary" id="push-test" type="button" hidden>Send test notification</button>
             <label class="push-update-control" for="push-following"><input id="push-following" type="checkbox" /> Notify me when Following changes</label>
             <span class="small" id="push-following-status" role="status" aria-live="polite"></span>
+            <label class="push-update-control" for="push-quiet-hours"><input id="push-quiet-hours" type="checkbox" /> Pause routine alerts on a schedule</label>
+            <div class="push-quiet-hours-times">
+              <label for="push-quiet-start">From <input id="push-quiet-start" type="time" value="22:00" /></label>
+              <label for="push-quiet-end">Until <input id="push-quiet-end" type="time" value="07:00" /></label>
+            </div>
+            <span class="small" id="push-quiet-status" role="status" aria-live="polite"></span>
             <label class="push-update-control" for="push-deadlines"><input id="push-deadlines" type="checkbox" /> Notify me about deadlines</label>
             <label for="push-deadline-hour">Reminder hour <select id="push-deadline-hour" aria-label="Deadline reminder local hour"></select></label>
             <label for="push-deadline-days">Warn me <select id="push-deadline-days" aria-label="Deadline reminder horizon"><option value="0">Due today</option><option value="2" selected>Next 2 days</option><option value="7">Next 7 days</option></select></label>

frontend/push-notifications.js

@@ -5,6 +5,10 @@
   control, status, testControl, deadlineControl, deadlineStatus, deadlineHour, deadlineDays,
   startDayControl, startDayStatus, startDayHour,
   followingControl, followingStatus,
+  quietControl = globalThis.document?.querySelector('#push-quiet-hours'),
+  quietStart = globalThis.document?.querySelector('#push-quiet-start'),
+  quietEnd = globalThis.document?.querySelector('#push-quiet-end'),
+  quietStatus = globalThis.document?.querySelector('#push-quiet-status'),
   deadlineSnooze, deadlineSnoozeStatus, deadlineSnoozeReview, onReviewDeadlines,
   notification, serviceWorker, fetchJson,
 }) {
@@ -302,6 +306,36 @@
     }
   }
 
+  async function changeQuietHours() {
+    if (!quietControl) return false;
+    for (const item of [quietControl, quietStart, quietEnd]) if (item) item.disabled = true;
+    try {
+      const timezone = Intl.DateTimeFormat().resolvedOptions().timeZone || 'UTC';
+      await fetchJson('api/v1/push-subscription/quiet-hours', {
+        method:'PUT',
+        headers:{'Content-Type':'application/json'},
+        body:JSON.stringify({
+          enabled:quietControl.checked,
+          start:quietStart?.value || '22:00',
+          end:quietEnd?.value || '07:00',
+          timezone,
+        }),
+      });
+      configuration.quiet_hours_enabled = quietControl.checked;
+      configuration.quiet_hours_start = quietStart?.value || '22:00';
+      configuration.quiet_hours_end = quietEnd?.value || '07:00';
+      quietStatus.textContent = quietControl.checked
+        ? `Routine alerts paused from ${configuration.quiet_hours_start} to ${configuration.quiet_hours_end} local time.`
+        : 'Routine alert quiet hours are off for this device.';
+      return true;
+    } catch (_error) {
+      quietStatus.textContent = 'Could not save quiet hours. Check your connection and try again.';
+      return false;
+    } finally {
+      for (const item of [quietControl, quietStart, quietEnd]) if (item) item.disabled = false;
+    }
+  }
+
   async function enableDeadline() {
     deadlineControl.checked = true;
     return changeDeadline();
@@ -340,6 +374,9 @@
     deadlineControl?.addEventListener('change', changeDeadline);
     startDayControl?.addEventListener('change', changeStartDay);
     followingControl?.addEventListener('change', changeFollowing);
+    quietControl?.addEventListener('change', changeQuietHours);
+    quietStart?.addEventListener('change', changeQuietHours);
+    quietEnd?.addEventListener('change', changeQuietHours);
     deadlineSnoozeReview?.addEventListener('click', reviewSnoozedDeadlines);
     configuration = await fetchJson('api/v1/push-subscription');
     if (!configuration.available) {
@@ -347,6 +384,7 @@
       if (deadlineControl) deadlineControl.disabled = true;
       if (startDayControl) startDayControl.disabled = true;
       if (followingControl) followingControl.disabled = true;
+      if (quietControl) quietControl.disabled = true;
       status.textContent = 'New update notifications are not available on this server.';
       return;
     }
@@ -354,6 +392,9 @@
     if (deadlineControl) deadlineControl.checked = Boolean(configuration.deadline_enabled);
     if (startDayControl) startDayControl.checked = Boolean(configuration.start_day_enabled);
     if (followingControl) followingControl.checked = Boolean(configuration.following_enabled);
+    if (quietControl) quietControl.checked = Boolean(configuration.quiet_hours_enabled);
+    if (quietStart) quietStart.value = configuration.quiet_hours_start || '22:00';
+    if (quietEnd) quietEnd.value = configuration.quiet_hours_end || '07:00';
     if (deadlineHour) deadlineHour.value = String(configuration.reminder_hour ?? 9);
     if (deadlineDays) deadlineDays.value = String(configuration.reminder_days ?? 2);
     if (startDayHour) startDayHour.value = String(configuration.start_day_reminder_hour ?? 9);
@@ -367,8 +408,11 @@
     if (followingStatus) followingStatus.textContent = configuration.following_enabled
       ? 'Following change alerts enabled for this device.'
       : 'Following change alerts are off for this device.';
+    if (quietStatus) quietStatus.textContent = configuration.quiet_hours_enabled
+      ? `Routine alerts paused from ${quietStart.value} to ${quietEnd.value} local time.`
+      : 'Routine alert quiet hours are off for this device.';
     renderDeadlineSnooze();
   }
 
-  return {init, change, changeDeadline, changeStartDay, changeFollowing, enableDeadline, deadlineReadiness, notificationReadiness, recoverPermission};
+  return {init, change, changeDeadline, changeStartDay, changeFollowing, changeQuietHours, enableDeadline, deadlineReadiness, notificationReadiness, recoverPermission};
 });

src/main.py

@@ -522,6 +522,30 @@ class FollowingNotificationPayload(BaseModel):
     enabled: bool
 
 
+class QuietHoursPayload(BaseModel):
+    enabled: bool
+    start: str = Field(pattern=r"^(?:[01]\d|2[0-3]):[0-5]\d$")
+    end: str = Field(pattern=r"^(?:[01]\d|2[0-3]):[0-5]\d$")
+    timezone: str = Field(min_length=1, max_length=64)
+
+    @field_validator("timezone")
+    @classmethod
+    def validate_timezone(cls, value: str) -> str:
+        from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
+
+        try:
+            ZoneInfo(value)
+        except ZoneInfoNotFoundError as error:
+            raise ValueError("Valid IANA timezone required") from error
+        return value
+
+    @model_validator(mode="after")
+    def distinct_boundaries(self):
+        if self.start == self.end:
+            raise ValueError("quiet hours require distinct start and end times")
+        return self
+
+
 StepUpAction = Literal[
     "merge_pull",
     "delete_source_branch",
@@ -2529,6 +2553,9 @@ async def push_status(request: Request):
     following_preferences = await asyncio.to_thread(
         _push_subscription_store.following_preferences, device_id
     )
+    quiet_hours = await asyncio.to_thread(
+        _push_subscription_store.quiet_hours, device_id
+    )
     delivery_health = await asyncio.to_thread(
         _push_subscription_store.delivery_health, device_id
     )
@@ -2545,6 +2572,10 @@ async def push_status(request: Request):
         "start_day_timezone": start_day_preferences["timezone"],
         "start_day_reminder_hour": start_day_preferences["reminder_hour"],
         "following_enabled": following_preferences["enabled"],
+        "quiet_hours_enabled": quiet_hours["enabled"],
+        "quiet_hours_start": quiet_hours["start"],
+        "quiet_hours_end": quiet_hours["end"],
+        "quiet_hours_timezone": quiet_hours["timezone"],
         "delivery_health": delivery_health,
     }
 
@@ -2712,6 +2743,31 @@ async def update_following_notifications(
     return {"following_enabled": payload.enabled}
 
 
+@app.put("/api/v1/push-subscription/quiet-hours")
+async def update_quiet_hours(payload: QuietHoursPayload, request: Request):
+    device_id = await dashboard_auth.session_management_id(
+        request.state.dashboard_session
+    )
+    if payload.enabled and not await asyncio.to_thread(
+        _push_subscription_store.is_subscribed, device_id
+    ):
+        raise HTTPException(status_code=409, detail="Enable device notifications first")
+    await asyncio.to_thread(
+        _push_subscription_store.set_quiet_hours,
+        device_id,
+        enabled=payload.enabled,
+        start=payload.start,
+        end=payload.end,
+        timezone=payload.timezone,
+    )
+    return {
+        "quiet_hours_enabled": payload.enabled,
+        "quiet_hours_start": payload.start,
+        "quiet_hours_end": payload.end,
+        "quiet_hours_timezone": payload.timezone,
+    }
+
+
 @app.patch("/api/v1/push-subscription/deadlines/snooze")
 async def snooze_deadline_reminder(request: Request):
     device_id = await dashboard_auth.session_management_id(

src/push_notifications.py

@@ -110,6 +110,7 @@ async def dispatch_following_changes(
     lease_seconds: float = 60.0,
     send_timeout_seconds: float = 10.0,
     max_concurrency: int = 8,
+    now: float | None = None,
 ) -> int:
     """Notify opted-in devices once for each privacy-safe Following change set."""
     if not configuration.enabled:
@@ -119,13 +120,15 @@ async def dispatch_following_changes(
         store.acquire_dispatch_lease,
         owner,
         channel="following",
-        now=time.time(),
+        now=time.time() if now is None else now,
         lease_seconds=max(15.0, lease_seconds, send_timeout_seconds + 5.0),
     )
     if not acquired:
         return 0
     try:
-        devices = await asyncio.to_thread(store.following_notification_devices)
+        devices = await asyncio.to_thread(
+            store.following_notification_devices, now=now
+        )
         if not devices:
             return 0
         snapshot = await following()
@@ -174,17 +177,25 @@ async def dispatch_following_changes(
                 device for device in pending if statuses.get(device.session_id) == "active"
             ]
         count = min(len(changed), 50)
-        payload = json.dumps({
-            "title": f"{count} watched item{'s' if count != 1 else ''} changed",
-            "body": "Open Following to review the latest activity.",
-            "route": "#/my-work/following",
-            "tag": f"stackchain-following-{fingerprint[:16]}",
-            "following_count": count,
-        }, separators=(",", ":"))
         semaphore = asyncio.Semaphore(max(1, max_concurrency))
 
         async def dispatch_device(device) -> int:
             async with semaphore:
+                payload = json.dumps({
+                    "title": (
+                        f"{count} watched update{'s' if count != 1 else ''} while alerts were paused"
+                        if device.catch_up
+                        else f"{count} watched item{'s' if count != 1 else ''} changed"
+                    ),
+                    "body": "Open Following to review the latest activity.",
+                    "route": "#/my-work/following",
+                    "tag": (
+                        "stackchain-following-catch-up"
+                        if device.catch_up
+                        else f"stackchain-following-{fingerprint[:16]}"
+                    ),
+                    "following_count": count,
+                }, separators=(",", ":"))
                 still_owner = await asyncio.to_thread(
                     store.acquire_dispatch_lease,
                     owner,
@@ -241,6 +252,7 @@ async def dispatch_unread_updates(
     max_concurrency: int = 8,
     max_individual_notifications: int = 3,
     endpoint_validator: Callable[[str], Awaitable[str]] | None = None,
+    now: float | None = None,
 ) -> int:
     if not configuration.enabled:
         return 0
@@ -249,7 +261,7 @@ async def dispatch_unread_updates(
         store.acquire_dispatch_lease,
         owner,
         channel="unread",
-        now=time.time(),
+        now=time.time() if now is None else now,
         lease_seconds=lease_seconds,
     )
     if not acquired:
@@ -265,7 +277,9 @@ async def dispatch_unread_updates(
         }
         unread_count = min(len(thread_revisions), 9999)
         await asyncio.to_thread(store.reconcile_unread, thread_revisions)
-        deliveries = await asyncio.to_thread(store.claim_unseen, thread_revisions)
+        deliveries = await asyncio.to_thread(
+            store.claim_unseen, thread_revisions, now=now
+        )
         if session_statuses is not None:
             try:
                 statuses = await session_statuses(
@@ -306,10 +320,10 @@ async def dispatch_unread_updates(
                     for thread_revision in delivery.thread_revisions
                     if thread_revision not in digest_pending
                 )
-                individual_revisions = new_revisions[
+                individual_revisions = () if delivery.catch_up else new_revisions[
                     :max(0, max_individual_notifications)
                 ]
-                overflow_revisions = (
+                overflow_revisions = delivery.thread_revisions if delivery.catch_up else (
                     delivery.digest_revisions
                     + new_revisions[len(individual_revisions):]
                 )
@@ -385,10 +399,22 @@ async def dispatch_unread_updates(
                         return count
                     payload = json.dumps(
                         {
-                            "title": f"{len(overflow_revisions)} new work updates",
-                            "body": "Tap to review them in Stackchain.",
+                            "title": (
+                                f"{len(overflow_revisions)} updates while alerts were paused"
+                                if delivery.catch_up
+                                else f"{len(overflow_revisions)} new work updates"
+                            ),
+                            "body": (
+                                "Open Updates to catch up in Stackchain."
+                                if delivery.catch_up
+                                else "Tap to review them in Stackchain."
+                            ),
                             "route": "#/my-work/updates",
-                            "tag": "stackchain-update-digest",
+                            "tag": (
+                                "stackchain-update-catch-up"
+                                if delivery.catch_up
+                                else "stackchain-update-digest"
+                            ),
                             "update_count": len(overflow_revisions),
                             "unread_count": unread_count,
                         },

src/push_subscription_store.py

@@ -7,7 +7,9 @@ import sqlite3
 import time
 from collections.abc import Iterable, Mapping
 from dataclasses import dataclass
+from datetime import datetime, timezone as datetime_timezone
 from pathlib import Path
+from zoneinfo import ZoneInfo
 
 from src.private_state import connect_private_sqlite
 from src.state_encryption import (
@@ -22,6 +24,7 @@ class PushDelivery:
     subscription: dict
     thread_revisions: tuple[tuple[int, str], ...]
     digest_revisions: tuple[tuple[int, str], ...] = ()
+    catch_up: bool = False
 
     @property
     def thread_ids(self) -> tuple[int, ...]:
@@ -57,6 +60,7 @@ class FollowingNotificationDevice:
     session_id: str
     subscription: dict
     delivered_fingerprint: str | None
+    catch_up: bool = False
 
 
 class DisabledPushSubscriptionStore:
@@ -91,10 +95,13 @@ class DisabledPushSubscriptionStore:
     def following_preferences(self, session_id: str) -> dict:
         return {"enabled": False}
 
-    def following_notification_devices(self) -> list[FollowingNotificationDevice]:
+    def quiet_hours(self, session_id: str) -> dict:
+        return {"enabled": False, "start": "22:00", "end": "07:00", "timezone": "UTC"}
+
+    def following_notification_devices(self, *, now: float | None = None) -> list[FollowingNotificationDevice]:
         return []
 
-    def claim_unseen(self, thread_revisions) -> list[PushDelivery]:
+    def claim_unseen(self, thread_revisions, *, now: float | None = None) -> list[PushDelivery]:
         return []
 
     def acquire_dispatch_lease(self, *args, **kwargs) -> bool:
@@ -133,6 +140,9 @@ class DisabledPushSubscriptionStore:
     def set_following_preferences(self, *args, **kwargs) -> None:
         return None
 
+    def set_quiet_hours(self, *args, **kwargs) -> None:
+        return None
+
     def mark_following_delivered(self, *args, **kwargs) -> None:
         return None
 
@@ -183,6 +193,16 @@ def _revisions(
     return tuple(sorted(normalized.items()))
 
 
+def _inside_quiet_hours(*, now: float, start: str, end: str, timezone: str) -> bool:
+    local = datetime.fromtimestamp(now, tz=datetime_timezone.utc).astimezone(ZoneInfo(timezone))
+    minute = local.hour * 60 + local.minute
+    start_minute = int(start[:2]) * 60 + int(start[3:])
+    end_minute = int(end[:2]) * 60 + int(end[3:])
+    if start_minute < end_minute:
+        return start_minute <= minute < end_minute
+    return minute >= start_minute or minute < end_minute
+
+
 class PushSubscriptionStore:
     """Durable, device-bound Web Push subscriptions and delivery deduplication."""
 
@@ -262,6 +282,16 @@ class PushSubscriptionStore:
                     FOREIGN KEY (session_id) REFERENCES push_subscriptions(session_id)
                         ON DELETE CASCADE
                 );
+                CREATE TABLE IF NOT EXISTS push_quiet_hours (
+                    session_id TEXT PRIMARY KEY,
+                    enabled INTEGER NOT NULL DEFAULT 0,
+                    start_time TEXT NOT NULL DEFAULT '22:00',
+                    end_time TEXT NOT NULL DEFAULT '07:00',
+                    timezone TEXT NOT NULL DEFAULT 'UTC',
+                    suppressed INTEGER NOT NULL DEFAULT 0,
+                    FOREIGN KEY (session_id) REFERENCES push_subscriptions(session_id)
+                        ON DELETE CASCADE
+                );
                 """
             )
             delivery_columns = {
@@ -612,20 +642,64 @@ class PushSubscriptionStore:
             ).fetchone()
         return {"enabled": bool(row[0]) if row else False}
 
-    def following_notification_devices(self) -> list[FollowingNotificationDevice]:
+    def set_quiet_hours(
+        self, session_id: str, *, enabled: bool, start: str, end: str, timezone: str
+    ) -> None:
+        with self._connect() as connection:
+            connection.execute(
+                """INSERT INTO push_quiet_hours(
+                       session_id, enabled, start_time, end_time, timezone
+                   ) VALUES (?, ?, ?, ?, ?)
+                   ON CONFLICT(session_id) DO UPDATE SET
+                       enabled = excluded.enabled,
+                       start_time = excluded.start_time,
+                       end_time = excluded.end_time,
+                       timezone = excluded.timezone,
+                       suppressed = CASE WHEN excluded.enabled = 1 THEN suppressed ELSE 0 END""",
+                (session_id, int(enabled), start, end, timezone),
+            )
+
+    def quiet_hours(self, session_id: str) -> dict:
+        with self._connect() as connection:
+            row = connection.execute(
+                """SELECT enabled, start_time, end_time, timezone
+                   FROM push_quiet_hours WHERE session_id = ?""",
+                (session_id,),
+            ).fetchone()
+        return {
+            "enabled": bool(row[0]) if row else False,
+            "start": row[1] if row else "22:00",
+            "end": row[2] if row else "07:00",
+            "timezone": row[3] if row else "UTC",
+        }
+
+    def following_notification_devices(
+        self, *, now: float | None = None
+    ) -> list[FollowingNotificationDevice]:
+        checked_at = time.time() if now is None else now
         with self._connect() as connection:
             rows = connection.execute(
-                """SELECT s.session_id, s.subscription_json, p.delivered_fingerprint
+                """SELECT s.session_id, s.subscription_json, p.delivered_fingerprint,
+                          q.enabled, q.start_time, q.end_time, q.timezone, q.suppressed
                    FROM push_subscriptions s
                    JOIN push_following_preferences p ON p.session_id = s.session_id
+                   LEFT JOIN push_quiet_hours q ON q.session_id = s.session_id
                    WHERE p.enabled = 1 ORDER BY s.session_id"""
             ).fetchall()
-        return [
-            FollowingNotificationDevice(
-                row[0], self._open_subscription(row[0], row[1]), row[2]
-            )
-            for row in rows
-        ]
+            devices = []
+            for row in rows:
+                if row[3] and _inside_quiet_hours(
+                    now=checked_at, start=row[4], end=row[5], timezone=row[6]
+                ):
+                    connection.execute(
+                        "UPDATE push_quiet_hours SET suppressed = 1 WHERE session_id = ?",
+                        (row[0],),
+                    )
+                    continue
+                devices.append(FollowingNotificationDevice(
+                    row[0], self._open_subscription(row[0], row[1]), row[2], bool(row[7])
+                ))
+        return devices
 
     def mark_following_delivered(self, session_id: str, fingerprint: str) -> None:
         with self._connect() as connection:
@@ -634,9 +708,14 @@ class PushSubscriptionStore:
                    WHERE session_id = ? AND enabled = 1""",
                 (fingerprint, session_id),
             )
+            connection.execute(
+                "UPDATE push_quiet_hours SET suppressed = 0 WHERE session_id = ?",
+                (session_id,),
+            )
 
     def claim_unseen(
-        self, thread_revisions: Mapping[int, str] | Iterable[int | tuple[int, str]]
+        self, thread_revisions: Mapping[int, str] | Iterable[int | tuple[int, str]],
+        *, now: float | None = None,
     ) -> list[PushDelivery]:
         candidates = _revisions(thread_revisions)
         if not candidates:
@@ -647,6 +726,21 @@ class PushSubscriptionStore:
             ).fetchall()
             deliveries = []
             for session_id, encoded in rows:
+                quiet = connection.execute(
+                    """SELECT enabled, start_time, end_time, timezone, suppressed
+                       FROM push_quiet_hours WHERE session_id = ?""",
+                    (session_id,),
+                ).fetchone()
+                catch_up = bool(quiet and quiet[4])
+                if quiet and quiet[0] and _inside_quiet_hours(
+                    now=time.time() if now is None else now,
+                    start=quiet[1], end=quiet[2], timezone=quiet[3],
+                ):
+                    connection.execute(
+                        "UPDATE push_quiet_hours SET suppressed = 1 WHERE session_id = ?",
+                        (session_id,),
+                    )
+                    continue
                 delivered = {
                     row[0]: row[1]
                     for row in connection.execute(
@@ -700,6 +794,7 @@ class PushSubscriptionStore:
                             self._open_subscription(session_id, encoded),
                             unseen,
                             tuple(digest_revisions),
+                            catch_up,
                         )
                     )
             return deliveries
@@ -770,3 +865,7 @@ class PushSubscriptionStore:
                 "DELETE FROM push_digest_pending WHERE session_id = ? AND thread_id = ?",
                 ((session_id, thread_id) for thread_id, _revision in values),
             )
+            connection.execute(
+                "UPDATE push_quiet_hours SET suppressed = 0 WHERE session_id = ?",
+                (session_id,),
+            )

tests/e2e/test_mobile_notification_quiet_hours_release.py

@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+import os
+import re
+from pathlib import Path
+
+import pytest
+
+if os.getenv("STACKCHAIN_RUN_RELEASE_E2E") != "1":
+    pytest.skip("rendered mobile quiet-hours checks run only in the browser gate", allow_module_level=True)
+pytest.importorskip("playwright.sync_api")
+from playwright.sync_api import expect, sync_playwright
+
+
+ROOT = Path(__file__).resolve().parents[2]
+FRONTEND = ROOT / "frontend"
+
+
+@pytest.mark.parametrize("viewport", [
+    {"width": 320, "height": 568},
+    {"width": 390, "height": 844},
+])
+def test_notification_quiet_hours_are_phone_usable_without_horizontal_scroll(viewport):
+    html = re.sub(r'<script src="static/[^"]+"></script>', "", (FRONTEND / "index.html").read_text())
+    with sync_playwright() as playwright:
+        browser = playwright.chromium.launch(headless=True)
+        page = browser.new_page(viewport=viewport)
+        page.set_content(html)
+        page.add_style_tag(path=FRONTEND / "dashboard.css")
+        page.locator("#work-settings-toggle").click()
+
+        toggle = page.locator('label[for="push-quiet-hours"]')
+        start = page.locator("#push-quiet-start")
+        end = page.locator("#push-quiet-end")
+        expect(toggle).to_be_visible()
+        expect(start).to_be_visible()
+        expect(end).to_be_visible()
+        expect(start).to_have_value("22:00")
+        expect(end).to_have_value("07:00")
+        for control in (toggle, start, end):
+            bounds = control.bounding_box()
+            assert bounds and bounds["height"] >= 44
+        assert page.evaluate("document.documentElement.scrollWidth <= window.innerWidth")
+        browser.close()

tests/test_push_frontend.py

@@ -34,6 +34,10 @@ const followingControl = {
   addEventListener:(_name, callback) => state.followingChange = callback,
 };
 const followingStatus = {set textContent(value) { state.followingText = value; }, get textContent() { return state.followingText; }};
+const quietControl = {checked:false, disabled:false, addEventListener:(_name, callback) => state.quietChange = callback};
+const quietStart = {value:'22:00', disabled:false, addEventListener:(_name, callback) => state.quietStartChange = callback};
+const quietEnd = {value:'07:00', disabled:false, addEventListener:(_name, callback) => state.quietEndChange = callback};
+const quietStatus = {set textContent(value) { state.quietText = value; }, get textContent() { return state.quietText; }};
 const status = {set textContent(value) { state.text = value; }, get textContent() { return state.text; }};
 const testControl = {hidden:true, disabled:false, addEventListener:(_name, callback) => state.testDelivery = callback};
 const deadlineSnooze = {hidden:true};
@@ -48,6 +52,7 @@ const feature = createPushNotifications({
   control, status, testControl, deadlineControl, deadlineStatus, deadlineHour, deadlineDays,
   startDayControl, startDayStatus, startDayHour,
   followingControl, followingStatus,
+  quietControl, quietStart, quietEnd, quietStatus,
   deadlineSnooze, deadlineSnoozeStatus, deadlineSnoozeReview,
   onReviewDeadlines:() => { state.reviewed = true; },
   notification: state.notification = {permission:'default', requestPermission:async () => { state.prompts += 1; state.notification.permission = state.permission || 'granted'; return state.notification.permission; }},
@@ -114,6 +119,41 @@ def test_device_settings_render_and_wire_the_following_alert_preference():
     assert "followingStatus:qs('#push-following-status')" in dashboard
 
 
+def test_quiet_hours_are_restored_and_saved_as_one_local_schedule():
+    result = run_scenario("""
+state.server = {available:true,subscribed:true,quiet_hours_enabled:true,quiet_hours_start:'21:30',quiet_hours_end:'06:45',quiet_hours_timezone:'America/New_York',public_key:'AQID'};
+state.current = existing;
+await feature.init();
+quietStart.value = '22:15';
+quietEnd.value = '07:30';
+await state.quietStartChange();
+process.stdout.write(JSON.stringify({requests:state.requests, checked:quietControl.checked, start:quietStart.value, end:quietEnd.value, text:state.quietText}));
+""")
+
+    assert result["checked"] is True
+    assert result["requests"][-1][0:2] == ["api/v1/push-subscription/quiet-hours", "PUT"]
+    body = json.loads(result["requests"][-1][2])
+    assert body["enabled"] is True
+    assert body["start"] == "22:15"
+    assert body["end"] == "07:30"
+    assert isinstance(body["timezone"], str) and body["timezone"]
+    assert result["text"] == "Routine alerts paused from 22:15 to 07:30 local time."
+
+
+def test_device_settings_render_and_wire_mobile_quiet_hours():
+    index = INDEX.read_text()
+    dashboard = DASHBOARD.read_text()
+
+    assert 'id="push-quiet-hours" type="checkbox"' in index
+    assert 'id="push-quiet-start" type="time"' in index
+    assert 'id="push-quiet-end" type="time"' in index
+    assert 'id="push-quiet-status" role="status" aria-live="polite"' in index
+    module = MODULE.read_text()
+    assert "querySelector('#push-quiet-hours')" in module
+    assert "querySelector('#push-quiet-start')" in module
+    assert "querySelector('#push-quiet-end')" in module
+
+
 def test_degraded_device_can_run_a_test_notification_and_show_recovery():
     result = run_scenario("""
 state.server = {available:true,subscribed:true,public_key:'AQID',delivery_health:{unread:{state:'degraded',consecutive_failures:3,reason:'timeout'}}};

tests/test_push_notifications.py

@@ -3,6 +3,7 @@ import asyncio
 import os
 import sqlite3
 import time
+from datetime import datetime, timezone
 from types import SimpleNamespace
 
 import httpx
@@ -62,6 +63,67 @@ def test_following_alert_preferences_are_opt_in_and_checkpoint_each_device(tmp_p
     assert store.following_preferences("session-b") == {"enabled": False}
 
 
+def test_quiet_hours_hold_unread_revisions_then_mark_one_catch_up_delivery(tmp_path):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    store.upsert("session-a", {
+        "endpoint": "https://push.example/session-a",
+        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+    })
+    store.set_quiet_hours(
+        "session-a", enabled=True, start="22:00", end="07:00", timezone="UTC"
+    )
+
+    inside = datetime(2026, 8, 25, 23, 0, tzinfo=timezone.utc).timestamp()
+    after = datetime(2026, 8, 26, 7, 1, tzinfo=timezone.utc).timestamp()
+
+    assert store.quiet_hours("session-a") == {
+        "enabled": True, "start": "22:00", "end": "07:00", "timezone": "UTC"
+    }
+    assert store.claim_unseen({42: "r1"}, now=inside) == []
+    delivery = store.claim_unseen({42: "r1"}, now=after)
+    assert len(delivery) == 1
+    assert delivery[0].thread_revisions == ((42, "r1"),)
+    assert delivery[0].catch_up is True
+    store.mark_delivered("session-a", delivery[0].thread_revisions)
+    assert store.claim_unseen({42: "r1"}, now=after) == []
+
+
+@pytest.mark.anyio
+async def test_unread_dispatch_sends_one_catch_up_digest_after_quiet_hours(tmp_path):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    store.upsert("session-a", {
+        "endpoint": "https://push.example/session-a",
+        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+    })
+    store.set_quiet_hours(
+        "session-a", enabled=True, start="22:00", end="07:00", timezone="UTC"
+    )
+    inside = datetime(2026, 8, 25, 23, 0, tzinfo=timezone.utc).timestamp()
+    after = datetime(2026, 8, 26, 7, 1, tzinfo=timezone.utc).timestamp()
+    assert store.claim_unseen({41: "r1", 42: "r1"}, now=inside) == []
+    sent = []
+
+    async def unread():
+        return {"items": [
+            {"id": 41, "updated_at": "r1"},
+            {"id": 42, "updated_at": "r1"},
+        ]}
+
+    async def send(_subscription, payload):
+        sent.append(json.loads(payload))
+
+    config = PushConfiguration("public", "private", "mailto:ops@example.com")
+    assert await dispatch_unread_updates(store, config, unread, send, now=after) == 1
+    assert sent == [{
+        "title": "2 updates while alerts were paused",
+        "body": "Open Updates to catch up in Stackchain.",
+        "route": "#/my-work/updates",
+        "tag": "stackchain-update-catch-up",
+        "update_count": 2,
+        "unread_count": 2,
+    }]
+
+
 @pytest.mark.anyio
 async def test_following_dispatch_is_private_deduplicated_and_session_bound(tmp_path):
     store = PushSubscriptionStore(tmp_path / "push.sqlite3")
@@ -109,6 +171,43 @@ async def test_following_dispatch_is_private_deduplicated_and_session_bound(tmp_
     assert store.subscription_for_session("revoked") is None
 
 
+@pytest.mark.anyio
+async def test_following_changes_wait_for_quiet_hours_and_resume_as_catch_up(tmp_path):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    store.upsert("session-a", {
+        "endpoint": "https://push.example/session-a",
+        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+    })
+    store.set_following_preferences("session-a", enabled=True)
+    store.set_quiet_hours(
+        "session-a", enabled=True, start="22:00", end="07:00", timezone="UTC"
+    )
+    inside = datetime(2026, 8, 25, 23, 0, tzinfo=timezone.utc).timestamp()
+    after = datetime(2026, 8, 26, 7, 1, tzinfo=timezone.utc).timestamp()
+    sent = []
+
+    async def following():
+        return {"items": [{
+            "repository": "private/project", "kind": "issue", "number": 42,
+            "title": "Sensitive", "updated_at": "2026-08-25T23:00:00Z",
+            "has_unseen_change": True,
+        }]}
+
+    async def send(_subscription, payload):
+        sent.append(json.loads(payload))
+
+    configuration = PushConfiguration("public", "private", "mailto:ops@example.com")
+    assert await dispatch_following_changes(
+        store, configuration, following, send, now=inside
+    ) == 0
+    assert sent == []
+    assert await dispatch_following_changes(
+        store, configuration, following, send, now=after
+    ) == 1
+    assert sent[0]["title"] == "1 watched update while alerts were paused"
+    assert sent[0]["route"] == "#/my-work/following"
+
+
 @pytest.mark.anyio
 async def test_authenticated_device_controls_following_alerts_independently(tmp_path, monkeypatch):
     store = PushSubscriptionStore(tmp_path / "push.sqlite3")
@@ -134,6 +233,43 @@ async def test_authenticated_device_controls_following_alerts_independently(tmp_
     assert store.start_day_preferences("session-a")["enabled"] is False
 
 
+@pytest.mark.anyio
+async def test_authenticated_device_persists_validated_quiet_hours(tmp_path, monkeypatch):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    store.upsert("session-a", {
+        "endpoint": "https://push.example/session-a",
+        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+    })
+    monkeypatch.setattr(main, "_push_subscription_store", store)
+
+    async def management_id(_session):
+        return "session-a"
+
+    monkeypatch.setattr(main.dashboard_auth, "session_management_id", management_id)
+    request = SimpleNamespace(state=SimpleNamespace(dashboard_session=object()))
+    payload = main.QuietHoursPayload(
+        enabled=True, start="22:30", end="06:45", timezone="America/New_York"
+    )
+
+    result = await main.update_quiet_hours(payload, request)
+
+    assert result == {
+        "quiet_hours_enabled": True,
+        "quiet_hours_start": "22:30",
+        "quiet_hours_end": "06:45",
+        "quiet_hours_timezone": "America/New_York",
+    }
+    status = await main.push_status(request)
+    assert {key: status[key] for key in result} == result
+
+
+def test_quiet_hours_reject_equal_boundaries_and_invalid_timezone():
+    with pytest.raises(ValueError):
+        main.QuietHoursPayload(enabled=True, start="22:00", end="22:00", timezone="UTC")
+    with pytest.raises(ValueError):
+        main.QuietHoursPayload(enabled=True, start="22:00", end="07:00", timezone="Moon/Base")
+
+
 def test_subscription_store_uses_private_filesystem_permissions(tmp_path):
     state_dir = tmp_path / "push-state"
     previous_umask = os.umask(0)
@@ -217,6 +353,7 @@ def test_push_store_factory_only_requires_its_key_when_push_is_enabled(
     disabled = factory(tmp_path / "disabled.sqlite3", push_enabled=False)
     assert disabled.is_subscribed("session-a") is False
     assert disabled.deadline_preferences("session-a")["enabled"] is False
+    assert disabled.claim_unseen({42: "r1"}, now=0) == []
     assert not (tmp_path / "disabled.sqlite3").exists()
     with pytest.raises(RuntimeError, match="encryption key"):
         factory(tmp_path / "enabled.sqlite3", push_enabled=True)
@@ -1435,6 +1572,10 @@ async def test_authenticated_device_can_subscribe_report_status_and_unsubscribe(
         "start_day_timezone": "UTC",
         "start_day_reminder_hour": 9,
         "following_enabled": False,
+        "quiet_hours_enabled": False,
+        "quiet_hours_start": "22:00",
+        "quiet_hours_end": "07:00",
+        "quiet_hours_timezone": "UTC",
         "delivery_health": {},
     }
     assert await main.subscribe_push(payload, request) == {"subscribed": True}