- `_applyResearchEffects` now receives the node id explicitly instead of
reading `node.id`, which is undefined (the id is the key in the tree's
`nodes` map, not a field on the object) — this was silently skipping
`activateGates` so researched jumpgates stayed dark
- Add `systemIdOfGatesNode()` as the pure inverse of `systemNodeId()` for
the gates node, with round-trip tests
- Reconcile gate activation in `_onEnterSystem()`: if the gates tech is
already unlocked, re-run `_activateSystemJumpgates` (idempotent) so a
missed activation self-heals on the next entry/jump/reload
- Make `_activateSystemJumpgates` idempotent by tracking fresh keys and
early-returning when everything is already online
- Add `navPoints()` and `navChart()` to SystemCategory.js as pure,
testable cores for the jumpgate unlock condition (discovered/missing
split over all NAV points)
- Add `js/dev/NavDiag.js` with `orbitNav()` / `orbitNavBrief()` console
commands that print the live NAV chart and which objects are still
undiscovered, installed by `main.js` on every page load
- Update `data/landing.json` to reference the correct gasgiant surface/shop
videos for slot 03
- Add tests for `navPoints`, `navChart`, and `systemIdOfGatesNode`
- Document the activation wiring bug, the `orbitNav()` diagnostic, and the
new pure functions in PROJECT_NOTES.md
- Introduce a dynamic "system" research category built at runtime with two techs: `{System} Map` (granted on entry) and `Unlock {System} Jumpgates` (researchable once every NAV point is discovered).
- Wire gate activation through the research effects seam so completing the jumpgate tech activates the system's gates plus linked return gates, anchors level-1 tethers at each activated gate, and saves/restores via a new `activatedGates` set.
- Extend ResearchModel with optional tree hooks (`available`, `lockNote`) so dynamic categories can gate research on live world state without adding static requires.
- Add map and gate procedural icons, update tests for the new category contract and icon roster, and document the system category in project notes.
Brian Fertig