chore: record direct edit manifest progress

.trellis/workspace/dingkang/journal-1.md

@@ -41,3 +41,23 @@ Completed the v2 direct-edit document, immutable revision storage, and area-conf
 ### Next Steps
 
 - Start the direct-edit solver and API child task.
+
+## Session 2: Direct-edit handle manifest
+
+**Date**: 2026-08-27
+**Task**: Continue `direct-edit-solver-api`, step 2
+**Git Commit**: `ab63d23`
+
+### Summary
+
+Added junction reserve calculation, six-kind handle manifest generation, and
+shared native feature ID builders. The solver remains pure and empty documents
+remain an identity transform for compiled geometry.
+
+### Testing
+
+- [OK] npm test; npm run format:check; npm run test:client; npm run test:client:unit; npm run build
+
+### Next Steps
+
+- Implement the six constraint kinds and invariant diagnostics (step 3).