feat: snooze mobile deadline reminders (Closes #1102)

frontend/service-worker.js

@@ -1,7 +1,7 @@
 const BASE = new URL('./', self.location.href).pathname;
 importScripts(BASE + 'static/private-data-registry.js');
 importScripts(BASE + 'static/background-issue-sync.js');
-const CACHE = 'stackchain-dashboard-shell-v120';
+const CACHE = 'stackchain-dashboard-shell-v121';
 const OFFLINE_LEASE_URL = new URL(BASE + '__offline-session-lease', self.location.origin).href;
 const OUTAGE_STATUSES = new Set([500, 502, 503, 504]);
 const NAVIGATION_TIMEOUT_MS = self.__STACKCHAIN_NAVIGATION_TIMEOUT_MS || 4000;
@@ -512,7 +512,7 @@ self.addEventListener('push', event => {
         tag,
         actions: [
           { action: 'protect-today', title: 'Protect Today' },
-          { action: 'open-agenda', title: 'Open Agenda' },
+          { action: 'snooze-deadline', title: 'Remind in 1 hour' },
         ],
         data: {route, protectRoute},
       }
@@ -630,10 +630,26 @@ self.addEventListener('notificationclick', event => {
     event.waitUntil(openWorkRoute(protectRoute));
     return;
   }
-  if (event.action === 'open-agenda') {
+  if (event.action === 'snooze-deadline') {
-    if (route !== '#/my-work/agenda') return;
+    if (
-    event.notification.close();
+      route !== '#/my-work/agenda'
-    event.waitUntil(openWorkRoute(route));
+      || !/^stackchain-deadline-digest-\d{4}-\d{2}-\d{2}$/.test(event.notification.tag)
+    ) return;
+    event.waitUntil((async () => {
+      const controller = new AbortController();
+      const timeout = setTimeout(() => controller.abort(), PUSH_ACTION_TIMEOUT_MS);
+      try {
+        await fetchJson(BASE + 'api/v1/push-subscription/deadlines/snooze', {
+          method: 'PATCH', headers: { Accept: 'application/json' }, signal: controller.signal,
+        });
+        event.notification.close();
+      } catch (_error) {
+        await openWorkRoute(route);
+        event.notification.close();
+      } finally {
+        clearTimeout(timeout);
+      }
+    })());
     return;
   }
   if (event.action === 'tomorrow') {

src/main.py

@@ -2236,6 +2236,23 @@ async def update_deadline_reminders(payload: DeadlineReminderPayload, request: R
     }
 
 
+@app.patch("/api/v1/push-subscription/deadlines/snooze")
+async def snooze_deadline_reminder(request: Request):
+    device_id = await dashboard_auth.session_management_id(
+        request.state.dashboard_session
+    )
+    now = int(time.time())
+    snoozed = await asyncio.to_thread(
+        _push_subscription_store.snooze_deadline_reminder,
+        device_id,
+        now=now,
+        delay_seconds=3_600,
+    )
+    if not snoozed:
+        raise HTTPException(status_code=409, detail="Enable deadline reminders first")
+    return {"snoozed": True, "snoozed_until": now + 3_600}
+
+
 @app.post("/api/v1/session/activity")
 async def record_session_activity(request: Request):
     session = request.state.dashboard_session

src/push_notifications.py

@@ -348,10 +348,16 @@ async def _dispatch_deadline_reminders_unlocked(
             local_now = current.astimezone(ZoneInfo(device.timezone))
         except ZoneInfoNotFoundError:
             continue
-        if (
+        snooze_due = (
-            local_now.hour >= device.reminder_hour
+            device.snoozed_until is not None
+            and device.snoozed_until <= current.timestamp()
+        )
+        daily_due = (
+            device.snoozed_until is None
+            and local_now.hour >= device.reminder_hour
             and device.delivered_local_day != local_now.date().isoformat()
-        ):
+        )
+        if snooze_due or daily_due:
             eligible_devices.append(device)
     if not eligible_devices:
         return 0
@@ -369,6 +375,11 @@ async def _dispatch_deadline_reminders_unlocked(
             continue
         due_days.append(due_day)
     if not due_days:
+        await asyncio.gather(*(
+            asyncio.to_thread(store.clear_deadline_snooze, device.session_id)
+            for device in eligible_devices
+            if device.snoozed_until is not None
+        ))
         return 0
     due_counts = {}
     for device in eligible_devices:
@@ -377,6 +388,11 @@ async def _dispatch_deadline_reminders_unlocked(
         due_count = sum(due_day <= local_cutoff for due_day in due_days)
         if due_count:
             due_counts[device.session_id] = due_count
+    await asyncio.gather(*(
+        asyncio.to_thread(store.clear_deadline_snooze, device.session_id)
+        for device in eligible_devices
+        if device.snoozed_until is not None and device.session_id not in due_counts
+    ))
     eligible_devices = [
         device for device in eligible_devices if device.session_id in due_counts
     ]
@@ -408,10 +424,16 @@ async def _dispatch_deadline_reminders_unlocked(
             except ZoneInfoNotFoundError:
                 return 0
             local_day = local_now.date().isoformat()
-            if (
+            snooze_due = (
-                local_now.hour < device.reminder_hour
+                device.snoozed_until is not None
-                or device.delivered_local_day == local_day
+                and device.snoozed_until <= current.timestamp()
-            ):
+            )
+            daily_due = (
+                device.snoozed_until is None
+                and local_now.hour >= device.reminder_hour
+                and device.delivered_local_day != local_day
+            )
+            if not (snooze_due or daily_due):
                 return 0
             due_count = due_counts[device.session_id]
             still_owner = await asyncio.to_thread(

src/push_subscription_store.py

@@ -31,6 +31,7 @@ class DeadlineReminderDevice:
     reminder_hour: int
     reminder_days: int
     delivered_local_day: str | None
+    snoozed_until: float | None
 
 
 def _revisions(
@@ -94,6 +95,7 @@ class PushSubscriptionStore:
                     reminder_hour INTEGER NOT NULL DEFAULT 9,
                     reminder_days INTEGER NOT NULL DEFAULT 2,
                     delivered_local_day TEXT,
+                    snoozed_until REAL,
                     FOREIGN KEY (session_id) REFERENCES push_subscriptions(session_id)
                         ON DELETE CASCADE
                 );
@@ -140,6 +142,10 @@ class PushSubscriptionStore:
                 connection.execute(
                     "ALTER TABLE push_deadline_preferences ADD COLUMN reminder_days INTEGER NOT NULL DEFAULT 2"
                 )
+            if "snoozed_until" not in preference_columns:
+                connection.execute(
+                    "ALTER TABLE push_deadline_preferences ADD COLUMN snoozed_until REAL"
+                )
     def _connect(self):
         connection = connect_private_sqlite(self.path, timeout=2)
         connection.execute("PRAGMA foreign_keys = ON")
@@ -233,20 +239,43 @@ class PushSubscriptionStore:
         with self._connect() as connection:
             rows = connection.execute(
                 """SELECT s.session_id, s.subscription_json, p.timezone,
-                          p.reminder_hour, p.reminder_days, p.delivered_local_day
+                          p.reminder_hour, p.reminder_days, p.delivered_local_day,
+                          p.snoozed_until
                    FROM push_subscriptions s
                    JOIN push_deadline_preferences p ON p.session_id = s.session_id
                    WHERE p.enabled = 1 ORDER BY s.session_id"""
             ).fetchall()
         return [
-            DeadlineReminderDevice(row[0], json.loads(row[1]), row[2], row[3], row[4], row[5])
+            DeadlineReminderDevice(
+                row[0], json.loads(row[1]), row[2], row[3], row[4], row[5], row[6]
+            )
             for row in rows
         ]
 
+    def snooze_deadline_reminder(
+        self, session_id: str, *, now: float, delay_seconds: int = 3_600
+    ) -> bool:
+        with self._connect() as connection:
+            result = connection.execute(
+                """UPDATE push_deadline_preferences SET snoozed_until = ?
+                   WHERE session_id = ? AND enabled = 1""",
+                (now + delay_seconds, session_id),
+            )
+            return result.rowcount == 1
+
+    def clear_deadline_snooze(self, session_id: str) -> None:
+        with self._connect() as connection:
+            connection.execute(
+                """UPDATE push_deadline_preferences SET snoozed_until = NULL
+                   WHERE session_id = ?""",
+                (session_id,),
+            )
+
     def mark_deadline_reminder_delivered(self, session_id: str, local_day: str) -> None:
         with self._connect() as connection:
             connection.execute(
-                """UPDATE push_deadline_preferences SET delivered_local_day = ?
+                """UPDATE push_deadline_preferences
+                   SET delivered_local_day = ?, snoozed_until = NULL
                    WHERE session_id = ? AND enabled = 1""",
                 (local_day, session_id),
             )

tests/test_comment_next.py

@@ -303,4 +303,4 @@ async def test_unread_update_offers_reply_mark_read_and_next_independent_of_toda
     assert '.update-reply-actions { display:grid; grid-template-columns:repeat(2,minmax(0,1fr));' in html
     assert '.update-reply-actions button { min-height:44px;' in html
     worker = (Path(__file__).parents[1] / "frontend" / "service-worker.js").read_text()
-    assert "stackchain-dashboard-shell-v120" in worker
+    assert "stackchain-dashboard-shell-v121" in worker

tests/test_deadline_reminders.py

@@ -55,6 +55,110 @@ async def test_deadline_reminder_sends_one_private_local_day_digest_and_deduplic
     assert "private/repo" not in json.dumps(sent)
 
 
+@pytest.mark.anyio
+async def test_snoozed_deadline_revalidates_and_sends_once_after_expiry(tmp_path):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    store.upsert("device-a", {
+        "endpoint": "https://push.example/device-a",
+        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+    })
+    store.set_deadline_preferences(
+        "device-a", enabled=True, timezone="UTC", reminder_hour=9
+    )
+    store.mark_deadline_reminder_delivered("device-a", "2026-08-13")
+    snoozed_at = datetime(2026, 8, 13, 10, 0, tzinfo=timezone.utc)
+    store.snooze_deadline_reminder(
+        "device-a", now=snoozed_at.timestamp(), delay_seconds=3_600
+    )
+    snapshots = 0
+    sent = []
+
+    async def assigned():
+        nonlocal snapshots
+        snapshots += 1
+        return {"complete": True, "items": [{"id": 1, "due_date": "2026-08-14"}]}
+
+    async def send(_subscription, payload):
+        sent.append(json.loads(payload))
+
+    config = PushConfiguration("public", "private", "mailto:ops@example.com")
+    assert await dispatch_deadline_reminders(
+        store, config, assigned, send,
+        now=datetime(2026, 8, 13, 10, 59, tzinfo=timezone.utc),
+    ) == 0
+    assert snapshots == 0
+
+    assert await dispatch_deadline_reminders(
+        store, config, assigned, send,
+        now=datetime(2026, 8, 13, 11, 0, tzinfo=timezone.utc),
+    ) == 1
+    assert snapshots == 1
+    assert sent[0]["deadline_count"] == 1
+    assert sent[0]["tag"] == "stackchain-deadline-digest-2026-08-13"
+    assert store.deadline_reminder_devices()[0].snoozed_until is None
+    assert await dispatch_deadline_reminders(
+        store, config, assigned, send,
+        now=datetime(2026, 8, 13, 11, 1, tzinfo=timezone.utc),
+    ) == 0
+    assert snapshots == 1
+
+
+@pytest.mark.anyio
+async def test_expired_deadline_snooze_clears_when_no_deadlines_remain(tmp_path):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    store.upsert("device-a", {
+        "endpoint": "https://push.example/device-a",
+        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+    })
+    store.set_deadline_preferences(
+        "device-a", enabled=True, timezone="UTC", reminder_hour=9
+    )
+    store.mark_deadline_reminder_delivered("device-a", "2026-08-13")
+    store.snooze_deadline_reminder(
+        "device-a",
+        now=datetime(2026, 8, 13, 10, 0, tzinfo=timezone.utc).timestamp(),
+    )
+
+    async def resolved():
+        return {"complete": True, "items": []}
+
+    assert await dispatch_deadline_reminders(
+        store,
+        PushConfiguration("public", "private", "mailto:ops@example.com"),
+        resolved,
+        now=datetime(2026, 8, 13, 11, 0, tzinfo=timezone.utc),
+    ) == 0
+    assert store.deadline_reminder_devices()[0].snoozed_until is None
+
+
+@pytest.mark.anyio
+async def test_expired_deadline_snooze_clears_when_deadlines_move_beyond_horizon(tmp_path):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    store.upsert("device-a", {
+        "endpoint": "https://push.example/device-a",
+        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+    })
+    store.set_deadline_preferences(
+        "device-a", enabled=True, timezone="UTC", reminder_hour=9, reminder_days=2
+    )
+    store.mark_deadline_reminder_delivered("device-a", "2026-08-13")
+    store.snooze_deadline_reminder(
+        "device-a",
+        now=datetime(2026, 8, 13, 10, 0, tzinfo=timezone.utc).timestamp(),
+    )
+
+    async def replanned():
+        return {"complete": True, "items": [{"id": 1, "due_date": "2026-08-20"}]}
+
+    assert await dispatch_deadline_reminders(
+        store,
+        PushConfiguration("public", "private", "mailto:ops@example.com"),
+        replanned,
+        now=datetime(2026, 8, 13, 11, 0, tzinfo=timezone.utc),
+    ) == 0
+    assert store.deadline_reminder_devices()[0].snoozed_until is None
+
+
 @pytest.mark.anyio
 async def test_deadline_reminder_counts_calendar_days_per_device_timezone(tmp_path):
     store = PushSubscriptionStore(tmp_path / "push.sqlite3")
@@ -240,6 +344,35 @@ def test_deadline_preferences_persist_on_the_existing_device_subscription(tmp_pa
     }
 
 
+def test_deadline_snooze_is_device_bound_and_requires_enabled_reminders(tmp_path):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    for session_id in ("enabled", "disabled"):
+        store.upsert(session_id, {
+            "endpoint": f"https://push.example/{session_id}",
+            "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+        })
+    store.set_deadline_preferences(
+        "enabled", enabled=True, timezone="UTC", reminder_hour=9
+    )
+    store.set_deadline_preferences(
+        "disabled", enabled=False, timezone="UTC", reminder_hour=9
+    )
+
+    assert store.snooze_deadline_reminder(
+        "enabled", now=1_765_000_000, delay_seconds=3_600
+    ) is True
+    assert store.snooze_deadline_reminder(
+        "disabled", now=1_765_000_000, delay_seconds=3_600
+    ) is False
+    assert store.snooze_deadline_reminder(
+        "missing", now=1_765_000_000, delay_seconds=3_600
+    ) is False
+
+    devices = {device.session_id: device for device in store.deadline_reminder_devices()}
+    assert devices["enabled"].snoozed_until == 1_765_003_600
+    assert "disabled" not in devices
+
+
 def test_existing_deadline_preferences_migrate_to_two_day_horizon(tmp_path):
     database = tmp_path / "push.sqlite3"
     import sqlite3

tests/test_later_sync.py

@@ -435,5 +435,5 @@ async def test_dashboard_syncs_every_later_change_and_exposes_account_status():
 def test_later_sync_ships_atomically_in_the_offline_shell():
     source = (Path(__file__).parents[1] / "frontend" / "service-worker.js").read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/later-sync.js'" in source

tests/test_markdown_renderer.py

@@ -256,4 +256,4 @@ def test_markdown_work_bodies_are_mobile_safe_block_containers():
     assert ".markdown-content { min-width:0; max-width:100%; overflow-wrap:anywhere;" in css
     assert ".markdown-content pre { max-width:100%; overflow-x:auto;" in css
     assert ".markdown-content a { min-height:44px;" in css
-    assert "stackchain-dashboard-shell-v120" in worker
+    assert "stackchain-dashboard-shell-v121" in worker

tests/test_mobile_composer_integration.py

@@ -45,7 +45,7 @@ def test_offline_shell_contains_every_local_dashboard_runtime_asset():
     shell_assets = set(re.findall(r"BASE \+ '([^']+)'", worker.split("async function sessionCsrf", 1)[0]))
 
     assert local_assets <= shell_assets, f"Offline shell is missing: {sorted(local_assets - shell_assets)}"
-    assert "stackchain-dashboard-shell-v120" in worker
+    assert "stackchain-dashboard-shell-v121" in worker
 
 
 def test_all_conversation_composers_offer_accessible_mobile_mentions():

tests/test_mobile_device_setup.py

@@ -265,7 +265,7 @@ def test_mobile_dashboard_mounts_phone_safe_device_setup_flow():
     assert "promptStorage:localStorage" in dashboard
     assert "pushControllerReady.then(ensureDeviceSetup)" in dashboard
     assert "BASE + 'static/mobile-device-setup.js'" in worker
-    assert "stackchain-dashboard-shell-v120" in worker
+    assert "stackchain-dashboard-shell-v121" in worker
     assert ".device-setup-panel" in css
     assert ".device-readiness-card" in css
     assert "overflow-x:hidden" in css

tests/test_mobile_insights.py

@@ -243,5 +243,5 @@ async def test_mobile_home_progressively_discloses_secondary_panels_as_insights(
 def test_mobile_insights_rolls_into_the_offline_shell():
     worker = (CONTROLLER.parent / "service-worker.js").read_text()
 
-    assert "stackchain-dashboard-shell-v120" in worker
+    assert "stackchain-dashboard-shell-v121" in worker
     assert "BASE + 'static/mobile-insights.js'" in worker

tests/test_mobile_start_day.py

@@ -358,7 +358,7 @@ async def test_dashboard_wires_thumb_safe_start_day_briefing_into_offline_mobile
     assert ".mobile-start-day-finish { min-height:44px;" in html
     assert "max-width:100%; overflow-wrap:anywhere;" in html
     assert "BASE + 'static/mobile-start-day.js'" in service_worker
-    assert "stackchain-dashboard-shell-v120" in service_worker
+    assert "stackchain-dashboard-shell-v121" in service_worker
 
 
 @pytest.mark.anyio

tests/test_plan_today.py

@@ -410,7 +410,7 @@ async def test_plan_today_wires_cancel_back_and_success_through_overlay_history(
 def test_plan_today_controller_is_available_in_the_offline_shell():
     source = SERVICE_WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/plan-today.js'" in source
     assert "BASE + 'static/plan-today-readiness.js'" in source
     assert "BASE + 'static/plan-today-preview.js'" in source

tests/test_push_notifications.py

@@ -1090,6 +1090,35 @@ async def test_authenticated_device_can_enable_deadline_reminders(tmp_path, monk
     assert store.deadline_preferences("session-a")["reminder_days"] == 7
 
 
+@pytest.mark.anyio
+async def test_authenticated_device_can_snooze_its_enabled_deadline_reminder(tmp_path, monkeypatch):
+    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
+    for session_id in ("session-a", "session-b"):
+        store.upsert(session_id, {
+            "endpoint": f"https://push.example/{session_id}",
+            "keys": {"p256dh": "public-key", "auth": "auth-secret"},
+        })
+        store.set_deadline_preferences(
+            session_id, enabled=True, timezone="UTC", reminder_hour=9
+        )
+    monkeypatch.setattr(main, "_push_subscription_store", store)
+    monkeypatch.setattr(main.time, "time", lambda: 1_765_000_000)
+
+    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()))
+
+    assert await main.snooze_deadline_reminder(request) == {
+        "snoozed": True,
+        "snoozed_until": 1_765_003_600,
+    }
+    devices = {device.session_id: device for device in store.deadline_reminder_devices()}
+    assert devices["session-a"].snoozed_until == 1_765_003_600
+    assert devices["session-b"].snoozed_until is None
+
+
 @pytest.mark.anyio
 async def test_subscription_rejects_an_unsafe_endpoint_before_persistence(tmp_path, monkeypatch):
     store = PushSubscriptionStore(tmp_path / "push.sqlite3")

tests/test_service_worker.py

@@ -168,13 +168,13 @@ async function dispatchPush(payload) {{
 def test_offline_activation_migration_rolls_the_shell_cache():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
 
 
 def test_resumable_today_session_ships_in_a_new_offline_shell():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/my-work.js'" in source
     assert "BASE + 'static/dashboard.js'" in source
     assert "BASE + 'static/dashboard.css'" in source
@@ -183,7 +183,7 @@ def test_resumable_today_session_ships_in_a_new_offline_shell():
 def test_mobile_conversation_photo_bundles_roll_the_offline_shell():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/dashboard.js'" in source
     assert "BASE + 'static/authored-outbox.js'" in source
     assert "BASE + 'static/background-issue-sync.js'" in source
@@ -192,7 +192,7 @@ def test_mobile_conversation_photo_bundles_roll_the_offline_shell():
 def test_photo_metadata_sanitizer_rolls_the_cached_optimizer_atomically():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/issue-evidence-review.js'" in source
     assert "BASE + 'static/issue-attachment.js'" in source
 
@@ -200,14 +200,14 @@ def test_photo_metadata_sanitizer_rolls_the_cached_optimizer_atomically():
 def test_ownership_exit_runtime_rolls_the_offline_shell_cache():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/dashboard.js'" in source
 
 
 def test_offline_review_next_ships_today_completion_atomically():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/today-completion.js'" in source
     assert "BASE + 'static/dashboard.js'" in source
 
@@ -215,7 +215,7 @@ def test_offline_review_next_ships_today_completion_atomically():
 def test_duplicate_aware_capture_ships_in_a_new_offline_shell():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/create-issue-sheet.js'" in source
     assert "BASE + 'static/dashboard.js'" in source
 
@@ -223,7 +223,7 @@ def test_duplicate_aware_capture_ships_in_a_new_offline_shell():
 def test_inline_checklist_step_flow_rolls_the_offline_shell_atomically():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/issue-sheet.js'" in source
     assert "BASE + 'static/checklist-conflict.js'" in source
     assert "BASE + 'static/dashboard.js'" in source
@@ -233,14 +233,14 @@ def test_inline_checklist_step_flow_rolls_the_offline_shell_atomically():
 def test_exact_later_picker_ships_atomically_in_a_new_offline_shell():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/later-picker.js'" in source
 
 
 def test_navigation_deadline_ships_in_a_new_shell_cache():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/dashboard.css'" in source
     assert "BASE + 'static/dashboard.js'" in source
     assert "BASE + 'static/install-app.js'" in source
@@ -249,21 +249,21 @@ def test_navigation_deadline_ships_in_a_new_shell_cache():
 def test_today_convergence_ships_in_a_new_shell_cache():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/today-sync.js'" in source
 
 
 def test_mobile_search_viewport_ships_in_a_new_offline_shell():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/mobile-search-viewport.js'" in source
 
 
 def test_update_ownership_flow_ships_atomically_in_a_new_offline_shell():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/update-ownership.js'" in source
 
 
@@ -850,7 +850,7 @@ def test_update_digest_push_opens_unread_inbox_without_item_actions_or_private_c
     assert "must-not-render" not in json.dumps(result["notifications"])
 
 
-def test_deadline_digest_push_offers_protect_today_and_agenda_without_rendering_private_copy():
+def test_deadline_digest_push_offers_protect_today_and_snooze_without_rendering_private_copy():
     result = run_worker_scenario(
         """
   await dispatchPush({
@@ -870,7 +870,7 @@ def test_deadline_digest_push_offers_protect_today_and_agenda_without_rendering_
             "tag": "stackchain-deadline-digest-2026-08-13",
             "actions": [
                 {"action": "protect-today", "title": "Protect Today"},
-                {"action": "open-agenda", "title": "Open Agenda"},
+                {"action": "snooze-deadline", "title": "Remind in 1 hour"},
             ],
             "data": {
                 "route": "#/my-work/agenda",
@@ -884,19 +884,62 @@ def test_deadline_digest_push_offers_protect_today_and_agenda_without_rendering_
     assert "must-not-render" not in json.dumps(result["notifications"])
 
 
-def test_deadline_digest_open_agenda_action_preserves_browsing_flow():
+def test_deadline_digest_snooze_action_records_device_bound_reminder_without_opening_app():
     result = run_worker_scenario(
         """
   await dispatchPush({
     tag:'stackchain-deadline-digest-2026-08-13', route:'#/my-work/agenda',
     protect_route:'#/my-work/agenda/protect-today', deadline_count:1,
   });
-  await dispatchNotificationClick('#/my-work/agenda', 'open-agenda', null, 'stackchain-deadline-digest-2026-08-13');
+  const calls = [];
+  context.fetch = async (request, options = {}) => {
+    const url = String(request.url || request);
+    const headers = new Headers(options.headers || {});
+    calls.push({url, method:String(options.method || 'GET'), csrf:headers.get('X-CSRF-Token')});
+    if (url.endsWith('/api/v1/session')) {
+      return new Response(JSON.stringify({csrf_token:'session-proof'}), {
+        status:200, headers:{'Content-Type':'application/json'},
+      });
+    }
+    return new Response(JSON.stringify({snoozed:true}), {
+      status:200, headers:{'Content-Type':'application/json'},
+    });
+  };
+  await dispatchNotificationClick('#/my-work/agenda', 'snooze-deadline', null, 'stackchain-deadline-digest-2026-08-13');
+  process.stdout.write(JSON.stringify({state,calls}));
+"""
+    )
+
+    assert result["calls"] == [
+        {
+            "url": "https://forge.example/dashboard/api/v1/session",
+            "method": "GET",
+            "csrf": None,
+        },
+        {
+            "url": "https://forge.example/dashboard/api/v1/push-subscription/deadlines/snooze",
+            "method": "PATCH",
+            "csrf": "session-proof",
+        },
+    ]
+    assert result["state"]["notificationClosed"] is True
+    assert result["state"]["opened"] == []
+
+
+def test_deadline_digest_failed_snooze_opens_agenda_instead_of_losing_reminder():
+    result = run_worker_scenario(
+        """
+  context.fetch = async () => { throw new Error('offline'); };
+  await dispatchNotificationClick(
+    '#/my-work/agenda', 'snooze-deadline', null,
+    'stackchain-deadline-digest-2026-08-13'
+  );
   process.stdout.write(JSON.stringify(state));
 """
     )
 
     assert result["opened"] == ["https://forge.example/dashboard/#/my-work/agenda"]
+    assert result["notificationClosed"] is True
 
 
 def test_push_mark_read_action_confirms_authenticated_mutation_without_opening_app():
@@ -1094,7 +1137,7 @@ def test_one_session_bound_csrf_proof_is_reused_for_a_background_drain():
 def test_queue_today_ships_atomically_in_a_new_offline_shell():
     source = WORKER.read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/queue-today.js'" in source
 
 

tests/test_today_readiness.py

@@ -221,7 +221,7 @@ async def test_today_blocker_opens_existing_preview_and_preserves_readiness_gate
 def test_readiness_runtime_is_available_in_offline_shell():
     service_worker = SERVICE_WORKER.read_text()
 
-    assert "const CACHE = 'stackchain-dashboard-shell-v120';" in service_worker
+    assert "const CACHE = 'stackchain-dashboard-shell-v121';" in service_worker
     assert "BASE + 'static/today-readiness.js'" in service_worker
 
 

tests/test_today_sync.py

@@ -191,7 +191,7 @@ sync.enqueueConfiguration(120, {{'issue:r:1:':60}});
 def test_inflight_today_drain_ships_in_a_new_offline_shell():
     source = (Path(__file__).parents[1] / "frontend" / "service-worker.js").read_text()
 
-    assert "stackchain-dashboard-shell-v120" in source
+    assert "stackchain-dashboard-shell-v121" in source
     assert "BASE + 'static/today-sync.js'" in source