Backlog batch: edge-LOD render (#22) + hierarchical layout (#30) + requirements coverage (#97) + MCP assignment tool (#28)

[mvalancy]

Integration of four independent, test-driven backlog items, each built in an isolated worktree by a parallel agent and verified together on this branch.

What's included

• Add TLS/SSL support and consolidate version management (v0.3.1-alpha) #22 EDGE-LOD-2 — wire the pure edgeLOD module into the renderer: zoom-aware arrow + label opacity/visibility, arrowhead scaling for crowded parallels, and perpendicular fan-out for parallel edges (new parallelEdges.ts, 8 tests).
• Changing graph node type in node editor dialog does not show in graph editor #30 LAYOUT-5 — hierarchical layout toggle wired into the sim. New computeNodeLayerY/parseLayoutMode; a desktop bottom-left Network toggle (force ↔ hierarchical, persisted); fy pinning by dependency layer, fully reversible to force. (15 layout tests.)
• feat(audit): OpenCV graph-balance metrics + flat high-contrast audit theme #97 ONTOLOGY-2 — Requirements Coverage view on the Ontology page: groups SATISFIES edges by REQUIREMENT and lists satisfying tasks with status (new pure requirementsCoverage.ts, 9 tests).
• Default node edit dialog is too large on standard laptop #28 MCP-1 — additive MCP suggest_task_assignment tool with a pure, deterministic rankTaskAssignments synthesis (expertise × availability scoring, 10 tests). No existing tools touched.

Verification (integrated branch)

• web tsc --noEmit: clean · mcp-server tsc --noEmit: clean
• web unit: 180/180 (incl. edgeLOD 13, parallelEdges 8, layoutAlgorithms 15, requirementsCoverage 9)
• mcp unit: assignment-synthesis 10/10
• THE GATE (test:smoke): 5/5 — nodes+edges render, no GraphQL/JS errors, grow flow, empty-state, layout persistence

Merge conflicts during integration were all stale-base import/JSX additions (resolved keep-both); the edge-LOD and layout edits touch disjoint regions of InteractiveGraphVisualization.tsx.

🤖 Generated with Claude Code

[github-actions]

🧪 Comprehensive Test Suite

• Unit suites (Node 18.x & 20.x) — core, web, server, mcp-server: ✅ passed
• Installer & deploy config: ✅ passed

Full-stack smoke gate runs in the CI workflow.