Replaces PacksRoutePlaceholder with the real triad route over the R2-B
/packs read substrate (#712).
- TS mirrors PackSource/PackSummary/PackDetail; PackSummary/PackDetail
removed from NOT_YET_MIRRORED (drift gate now enforces them)
- new design primitive TreeView (src/design/components/TreeView): a
deterministic, keyboard-driven JSON tree — object keys sorted, array
indices in order, no animation; ←/→ collapse/expand, ↑/↓ + j/k move,
Home/End jump, Enter toggles; registers its shortcuts only while focused
(KeyboardHelp never advertises tree controls when no tree is on screen)
- list pane: VirtualizedList + useListNavigation (j/k) + SearchInput; rows
show pack_id, source, version, language/modality, determinism_class pill
- detail pane: Panel + TabBar (Manifest / Checksums / Raw); Manifest renders
via TreeView; Checksums is the verify affordance — manifest_digest and
declared checksum as DigestBadges plus the per-field manifest checksums
table (the checksum-hashes-the-bytes-on-disk doctrine made visible); Raw
collapsed by default
- selection publishes the pack subject (R2-S), records /packs/<packId>
(replace), pushRecentItem on visit
- Packs row added to routeConformance MOUNT_ROUTES (loading 'Loading
packs...', error 'No packs mutation occurred.', empty 'No packs
discovered.' + core pack validate <path>)
- tests: TreeView (sorted/collapsed/expand/collapse/focus/click/empty) +
PacksRoute (list, replace-mode select + manifest tree, checksum verify
affordance, j/k spine)
Token-only styling (hexScan green).
cfcd7dc9ec