Create-flow UX follow-ups for wizards

Itemized UX issues noticed while testing the create wizards at 390 px and desktop (Task 8566): 1. Automation When step (390 px): the "Next <time>" line sits flush on the "Keep logs" field's outlined label with no gap; add the Stack's normal spacing between the schedule summary and Keep logs. 2. Project wizard Review: an operator with no placeable nodes reads "An admin adds nodes on the Slots page." Nodes are added on the Nodes page; point the hint (and a link) there. 3. Project wizard Review: the "No agent is set up yet" warning and the onboarding note both mention accounts; merge them into one line on Review. 4. NodeLink header (390 px): a long name pushes the mount path onto two lines in mono and stacks Delete under it; truncate the mount path with a hover/copy instead of wrapping mid-segment. 5. Add node dialog: the Projects field's two-sentence hint is longer than any other help line in the dialog; cut it to one line per the UI copy standard. Out of scope: API changes, placement or pre-pick logic, schedule semantics. Done means: - Each item fixed, or declined with a one-line reason in the PR. - Screenshots at 390 px and desktop for each changed surface.

All 5 wizard UX items fixed (Keep logs gap, Nodes-page hint, one no-agent line, ellipsised NodeLink path + copy, one-line Projects hint); quick gate + 388 tests green; visual check at 390/desktop clean. PR #6510 queued. Follow-up draft 8654. Memory: none applied.