feat(forms): wire keyboard hints and aria attributes across settings and admin forms

Bring the same `inputMode`, `enterKeyHint`, `autoComplete`, and
`spellCheck` defaults to the settings and admin surfaces:

- Account: profile email gets `autoComplete="email"` +
  `enterKeyHint="next"`, the disabled username carries
  `autoComplete="username"` so the password manager can still bind
  the credential, and the height field hints the decimal keyboard.
- Telegram card: bot token and chat ID both opt out of autofill,
  disable spell-check + autocapitalize, and lead the chained next →
  done keyboard order.
- Integrations: Withings client-id / secret and the moodLog URL +
  API key share the off-spell + no-capitalize secret-input contract
  and chain into the test / save action via `enterKeyHint`.
- Notifications anchors: each card wrapper carries `scroll-mt-28`
  so direct anchor navigation to `#telegram`, `#ntfy`, `#web-push`
  lands the section header below the safe-area sticky header
  instead of under it.
- Thresholds editor: min/max numeric inputs derive `inputMode`
  ("numeric" for integer ACTIVITY_STEPS, "decimal" elsewhere) and
  chain next → done.
- Admin reminders: the late-window and missed-window minute inputs
  pin `inputMode="numeric"` and the next → done keyboard order.

src/components/admin/reminders-section.tsx

@@ -132,6 +132,8 @@ export function RemindersSection() {
             <Input
               id="admin-reminder-late"
               type="number"
+              inputMode="numeric"
+              enterKeyHint="next"
               min={15}
               max={480}
               value={reminderLateDraft ?? settings?.reminderLateMinutes ?? 120}
@@ -153,6 +155,8 @@ export function RemindersSection() {
             <Input
               id="admin-reminder-missed"
               type="number"
+              inputMode="numeric"
+              enterKeyHint="done"
               min={30}
               max={720}
               value={