Dynamic child resolvers returned Some for any name, fabricating phantom
document and section directories so walks to nonexistent paths appeared
to succeed. Validate existence and return None instead:
- root resolver checks get_doc
- document resolver checks new OrkState::section_exists
- section resolver checks child_ids
Also fix create_child_section, which corrupted the org file:
- find_section_end used the parent's headline-end offset, inserting the
child before the parent's PROPERTIES/ID drawer and detaching its ID.
Use section.span.end, which covers planning, drawer, body, children.
- The child headline was written verbatim; demote it to parent.level + 1
via the new restar helper.
Add regression tests for restar and child section nesting.
- set_section_keyword/priority/title/tags
- set_section_scheduled/deadline/closed
- set_section_properties/body
- rebuild_headline helper for atomic headline updates
- Fixed replace_headline to preserve DEADLINE/:PROPERTIES: lines
- Clear read cache on write in 9P server
All writes tested working via 9p client.
Simple 9P2000 client supporting:
- Connect via Unix socket or TCP
- read/write/rdwr operations
- Directory listing
Preparation for reworking CLI to use 9P server.
- new file at root: create org file
- new file at doc level: create top-level section
- new file at section level: create child section
- All created sections get UUID in :ID: property
- body file added to doc (alias for raw)
- Test for section creation via 9P namespace