Plan: Fix sidebar org/env views — add test infrastructure and unit tests#

Summary#

The code fix for buildOrgViewItems and buildEnvViewItems is already merged (commit 1b54b4b). The remaining work is setting up Vitest test infrastructure and writing unit tests that cover multi-issue scanning, deduplication, run merging, and empty-state edge cases per the acceptance criteria.

Files#

Steps#

1. Install Vitest and configure it for the Next.js/TypeScript project — create vitest.config.ts, update package.json test script.
2. Write unit tests for buildOrgViewItems covering: multi-issue scanning, org deduplication by name, repo deduplication within an org, run merging across issues, empty root array, and missing tasks/e2e/ inside an issue directory.
3. Write unit tests for buildEnvViewItems covering: multi-issue scanning, environment grouping (e2e, production), child merging across issues, empty root array, and missing tasks/ inside an issue directory.
4. Write unit tests for findNodeAtPath helper covering: valid path lookup, missing intermediate segment, empty segments array.

Verification#

• npm run test passes with all new tests green
• npm run lint passes with zero warnings
• npm run build succeeds without errors

Risks#

• No existing test infrastructure means Step 1 must correctly configure Vitest for Next.js path aliases (@/ → src/) — verify tsconfig.json paths are resolved.