- add tree shell runtime artifact contracts and page/filetree/picker runtime reducers
- sink tree.subtree.move write operation through Rust and formalize command event plans
- harden file tree search projection contract and route thin-proxy boundaries
- record completed harness tasks and move design docs into process/done
- switch main document flow toward leptos tiptap island host and generated runtime assets
- align page aggregate loading, page head single-source updates, and AI tool result recovery
- add tests and smoke scripts for title sync, AI route recovery, and editor host cutover