Replaces the separate Entities/Graph nav items with one Knowledge Base
page that browses all entities as either a table or a force-graph,
scoped by ontology layer (Infrastructure/Governance/Cognition), with a
resizable browse/detail split instead of a slide-over sheet.
- New KnowledgeBase.svelte: layer tabs, view toggle, resizable
browse/detail split (pattern from Chat.svelte's rail).
- EntityTable/EntityGraph extracted as presentational sub-components;
their search/filter/root/depth toolbars live in the shared page
toolbar (not the resizable pane) so they don't truncate when the
divider is dragged narrow, and both views start flush with the
detail pane for consistent height.
- EntityTable columns are sortable (slug/type/name/state/health).
- EntityDetailContent redesigned as a single-column list of
collapsible sections (DetailSection.svelte), collapsed by default
when empty; relation entries are clickable and select the entity in
the browse pane + detail pane (and drill in-place in EntitySheet
wherever it's used elsewhere in the app).
- api.ts: add layer filter to fetchEntities, add fetchEntityTypes for
client-side graph layer scoping (the graph endpoint has no layer
param).
Old hash routes (#/entities, #/graph) redirect to #/kb.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
