feat(stats): add v1 immersion stats dashboard (#19)

backlog/tasks/task-114 - Fix-failing-CI-checks-on-PR-15.md

@@ -5,7 +5,7 @@ status: Done
 assignee:
   - codex
 created_date: '2026-03-08 00:34'
-updated_date: '2026-03-08 00:37'
+updated_date: '2026-03-16 05:13'
 labels:
   - ci
   - test
@@ -15,20 +15,17 @@ references:
   - src/renderer/style.css
   - .github/workflows/ci.yml
 priority: high
+ordinal: 68500
 ---
 
 ## Description
 
 <!-- SECTION:DESCRIPTION:BEGIN -->
-
 Investigate the failing GitHub Actions CI run for PR #15 on branch `yomitan-fork`, fix the underlying test or code regression, and verify the affected local test/CI lane passes.
-
 <!-- SECTION:DESCRIPTION:END -->
 
 ## Acceptance Criteria
-
 <!-- AC:BEGIN -->
-
 - [x] #1 Identified the concrete failing CI job and captured the relevant failure context
 - [x] #2 Implemented the minimal code or test change needed to resolve the CI failure
 - [x] #3 Verified the affected local test target and the broader fast CI test lane pass
@@ -37,7 +34,6 @@ Investigate the failing GitHub Actions CI run for PR #15 on branch `yomitan-fork
 ## Implementation Plan
 
 <!-- SECTION:PLAN:BEGIN -->
-
 1. Inspect the failing GitHub Actions run and confirm the exact failing test/assertion.
 2. Reproduce the failing renderer stylesheet test locally and compare the assertion against current CSS.
 3. Apply the minimal test or stylesheet fix needed to restore the intended hover/selection behavior.
@@ -47,7 +43,6 @@ Investigate the failing GitHub Actions CI run for PR #15 on branch `yomitan-fork
 ## Implementation Notes
 
 <!-- SECTION:NOTES:BEGIN -->
-
 GitHub Actions run 22810400921 failed in job build-test-audit, step `Test suite (source)`, with a single failing test: `JLPT CSS rules use underline-only styling in renderer stylesheet` in src/renderer/subtitle-render.test.ts.
 
 Reproduced the failing test locally with `bun test src/renderer/subtitle-render.test.ts`. The failure was a brittle stylesheet assertion, not a renderer behavior regression.
@@ -55,17 +50,14 @@ Reproduced the failing test locally with `bun test src/renderer/subtitle-render.
 Updated the renderer stylesheet test helper to split selectors safely across `:is(...)` commas and normalize multiline selector whitespace, then switched the failing hover/JLPT assertions to inspect extracted rule blocks instead of matching the entire CSS file text.
 
 Verification passed with `bun test src/renderer/subtitle-render.test.ts` and `bun run test`.
-
 <!-- SECTION:NOTES:END -->
 
 ## Final Summary
 
 <!-- SECTION:FINAL_SUMMARY:BEGIN -->
-
 Investigated GitHub Actions CI run `22810400921` for PR #15 and confirmed the only failing job was `build-test-audit`, step `Test suite (source)`, with a single failure in `src/renderer/subtitle-render.test.ts` (`JLPT CSS rules use underline-only styling in renderer stylesheet`).
 
 The renderer CSS itself was still correct; the regression was in the test helper. `extractClassBlock` was splitting selector lists on every comma, which breaks selectors containing `:is(...)`, and the affected assertions fell back to brittle whole-file regex matching against a multiline selector. Fixed the test by teaching the helper to split selectors only at top-level commas, normalizing selector whitespace around multiline `:not(...)` / `:is(...)` clauses, and asserting on extracted rule blocks for the plain-word hover and JLPT-only hover/selection rules.
 
 Verification: `bun test src/renderer/subtitle-render.test.ts` passed, and `bun run test` passed end to end (the same fast lane that failed in CI).
-
 <!-- SECTION:FINAL_SUMMARY:END -->