refactor(store): dedupe node-type maps, cover resolveParentEntityType

[bburda]

Pull Request

Summary

Follow-up polish on the parent entity-type resolution used by the topic data fallback (#77). No user-facing behavior change beyond dropping a latent invalid type cast.

• Export resolveParentEntityType and add unit tests covering the runtime_only function/app hierarchy (the scenario behind the topic data 400), operations/configurations/faults resource segments, and the not-in-tree and unknown-type fallbacks.
• Hoist NODE_TYPE_TO_RESOURCE and resolveParentEntityType next to findNode so the /** Fallback: fetch entity details ... */ comment documents fetchEntityFromApi again.
• Replace the duplicate type maps in handleTopicSelection and refreshSelectedEntity with the shared NODE_TYPE_TO_RESOURCE, dropping the invalid ${type}s cast for sub-area/sub-component node types.
• Fix a JSDoc typo and a split comment fragment.

---

Issue

Link the related issue (required):

• closes Polish follow-up: regression test + comment cleanup for parent entity-type resolution #77

---

Type

• Bug fix
• New feature
• Breaking change
• Documentation only

---

Testing

• npx vitest run - 412 tests pass (16 files), including 9 new resolveParentEntityType cases in store-helpers.test.ts.
• npm run typecheck, npm run lint, npm run format:check - clean.
• npm run build - succeeds.

---

Checklist

• Breaking changes are clearly described (and announced in docs / changelog if needed)
• Linting passes (npm run lint)
• Build succeeds (npm run build)
• Docs were updated if behavior or public API changed

[Copilot]

Pull request overview

Refactors and hardens the “parent entity-type resolution” logic in the Zustand store to avoid duplicated node-type → API-resource mappings, and adds unit tests to prevent regressions in runtime_only (function/app) hierarchy scenarios tied to #77.

Changes:

• Hoisted/deduplicated the node-type → API resource mapping into a single NODE_TYPE_TO_RESOURCE constant and reused it in topic selection + refresh logic.
• Exported resolveParentEntityType and added focused unit tests covering runtime_only depth pitfalls, supported resource segments, and safe fallbacks.
• Minor comment/JSDoc cleanup so the fallback documentation again applies to fetchEntityFromApi.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/lib/store.ts	Centralizes node-type→resource mapping, exports resolveParentEntityType, and replaces ad-hoc casts/maps in topic selection and refresh logic.
src/lib/store-helpers.test.ts	Adds unit coverage for resolveParentEntityType (runtime_only hierarchy, resource segments, unknown/missing parent fallbacks).