fix: address all code review issues from both reviewers

- Fix race condition: setGraph no longer wipes domainGraph on parallel fetch
- Remove workflow/action aliases that conflicted with pipeline type
- Remove duplicate onNodeDoubleClick handler in DomainGraphView
- Add clearActiveDomain store action (replaces direct setState call)
- Remove auto-switch to domain viewMode in setDomainGraph
- Add DomainMetaSchema Zod validation for domainMeta fields
- Add Array.isArray guards for domainMeta collections in NodeInfo
- Remove as-any cast in getDomainMeta (use typed domainMeta directly)
- Add "domain" filter category for domain/flow/step nodes
- Keep flow discriminator in step ID normalization to prevent collisions
- Update SKILL.md Phase 2 to use tool-based scanning (no missing script)
- Update EDGE_LABELS comment to reflect 29 edge types
- Bump version to 2.1.0 in all 4 required files

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.cursor-plugin/plugin.json

@@ -2,7 +2,7 @@
   "name": "understand-anything",
   "displayName": "Understand Anything",
   "description": "AI-powered codebase understanding — analyze, visualize, and explain any project",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "author": {
     "name": "Lum1104"
   },