fix(push): stop the invisible push sent for every recorded dose

Each taken or skipped dose sent a `clear` push to every subscription of
the account. The service worker closed the pending reminder and showed
nothing. A subscription made with userVisibleOnly may not receive
pushes that show no notification: Safari revokes it after a few, the
next reminder meets a 410 and the channel is switched off, with nothing
in the app saying why.

The clear push, its three call sites and the badge count only it fed
are removed. A reminder already on screen now stays until it is tapped,
dismissed or replaced by the next reminder for the same dose. The
sender's badge field went too: nothing else ever set it. The parity
snapshots lose the two recorded effects.

src/__tests__/baselines/source-function-lines.json

@@ -1,7 +1,7 @@
 {
   "$comment": "Production functions over 200 lines, keyed \"file :: name\", and their length. Maintained by src/__tests__/source-size-ratchet.test.ts.",
   "count": 344,
-  "total": 111520,
+  "total": 111507,
   "entries": {
     "app/achievements/page.tsx :: AchievementsPage": 206,
     "app/api/admin/backups/upload/route.ts :: apiHandler(arg)": 275,
@@ -331,7 +331,7 @@
     "lib/multipart/stream-to-disk.ts :: streamMultipartToDisk": 272,
     "lib/notifications/dispatcher.ts :: dispatchNotification": 378,
     "lib/notifications/senders/apns.ts :: sendViaApns": 299,
-    "lib/notifications/senders/web-push.ts :: sendViaWebPush": 268,
+    "lib/notifications/senders/web-push.ts :: sendViaWebPush": 255,
     "lib/personal-records/pr-detection-worker.ts :: detectPersonalRecordsForUser": 239,
     "lib/personal-records/pr-direction.ts :: getPRDirection": 208,
     "lib/record-activity/activity-verb.ts :: recordActivityVerbLine": 261,