/notifications/new could be a saved flow's own page, so the draft now opens at
/notifications/draft/new, which has a segment more than any flow's route. The
placeholder id no longer needs reserving. The .notify-node-hits rule styled the
removed tree rows; nothing renders it.
The flows list draws each flow as the editor's graph, read-only and with the
dry run's hit counts in the boxes, in place of the indented tree. A box's line
of text is cut by the browser at the box's edge, so it no longer runs out of it.
create flow (a primary button beside the refresh interval) and duplicate open
the editor on an unsaved draft at /notifications/new, with ?from= naming the
flow to copy; the flow is made by save, under an id taken from its name. Edit
and duplicate are buttons in the flow's header row. The editor's head and
inspector are laid out as sections.
A custom flow opens at /notifications/<id>: its nodes drawn left to right
(source, then matches, then todos), and a panel to edit the picked node: the
source's events, a match's conditions, a todo's recipients, op, key and text.
Add a match or todo below a node, move a branch under another match, or remove
it; an edit the controller would refuse (a todo with children, a second
parent, a cycle, over the node or depth cap) is turned away with the reason.
Edits stay in a draft until save, which sends the whole document at the
revision read. A stale revision is told apart from a refused document: the
editor offers to reload or to keep the draft on top of the latest. The form
choices come from the controller's schema when it sends one.
The list page gains edit and duplicate on custom flows, duplicate on the
built-ins, and a new-flow box; a new flow's id avoids the built-ins' too.
