Adds a third :temporal view mode alongside :tags-and-objects and
:all-pages. The backend reuses build-all-pages-graph's node/link shape
unchanged (every node already carries :block/created-at); only the
client-side pixi layout differs, arranging nodes along a fixed
chronological timeline (oldest first, staggered across a few lanes)
instead of running the force simulation, following the existing
grid-layout fixed-position precedent.
Establishes version control for the personal Logseq DB fork before
starting the server-client architecture migration and domain features
described in docs/agent-guide and the approved implementation plan.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
