Two bugs in the channel-enabled affordance:
1. List-row toggle was a static span with no handler; the row's
row-link overlay swallowed every click and routed to /edit. Add
POST /settings/notifications/{id}/toggle backed by a new store
method SetNotificationChannelEnabled, and turn the row toggle
into an htmx-driven button that swaps in the new state. Use
event.stopPropagation() on the toggle so it beats the row link.
2. Edit-form toggle visually flipped but the underlying checkbox
reverted: the visual span lives inside the <label>, so clicking
it fired the inline JS handler AND the label's native
checkbox-toggle, cancelling out. Bind to the checkbox 'change'
event instead and let the label do the toggling — the JS just
mirrors check.checked into the .on class.
Add settings.html (shell + sub-tab nav + conditional list/edit body),
notifications.html and notification_edit.html (glob stubs), and the
supporting CSS tokens (.ch-row, .ch-icon, .toggle, .kind-grid,
.kind-card, .radio-pip, .test-pill) to input.css. Rebuild styles.css.
Add ui_parse_test.go to catch template regressions at test time.
The kind picker is JS-driven (no full page reload); the enabled toggle
mirrors the existing visual toggle pattern; the test-notification button
uses HTMX and renders the JSON response as a coloured pill client-side.
steve