Each major section on /i/{path} is now wrapped in a native <details>
element with a smart-default `open` attribute. The inline JS overrides
the default from localStorage so m's per-item collapse state survives
reloads.
## Smart defaults (server-rendered open attr)
- Tasks: open if any linked calendar has >=1 open VTODO
- Issues: open if total open issues <= 10
- Documents: open if dated link count <= 5
- Public listing: closed by default
## Persistence
localStorage["projax.section." + item_id + "." + section] = "open" | "closed".
Inline JS reads on boot, writes on toggle. The "reset section state" link
in the form actions wipes every key for the current item and reloads —
smart defaults take over again.
## What's not collapsed
- Title + status/tags chip line (always visible breadcrumb)
- The inline edit form's standard fields (title/slug/parents/content)
Only the auxiliary sections — Tasks, Issues, Documents, Public listing —
collapse. m always sees what an item *is* without expanding anything.
## Tests
- TestDetailIncludesSectionToggleScript — script fragments ship
- TestDetailSectionsWrappedInDetails — every section has its wrapper
- TestDetailDocumentsClosedDefaultsWhenManyItems — 0-doc baseline is open
## docs/design.md
New section before §15 documents thresholds, persistence semantics, and
the non-collapsible carve-outs.