Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@cli/cli.ts`:
- Around line 40-41: The build fails because dirname is used but not imported;
update the import that provides fileURLToPath to also import dirname so
dirname(fileURLToPath(import.meta.url)) works correctly when computing cliDir
and resolving astroRoot (look for the import that currently brings in
fileURLToPath and add dirname to it), then re-run typecheck to ensure cliDir and
astroRoot assignments compile.

In `@src/pages/`[section]/[...page].astro:
- Line 60: The rewrite is using the raw section value (entry.data.section) while
route params use kebabCase(entry.data.section), causing mismatched URLs; update
the Astro.rewrite call to use the same kebab-cased section (e.g.,
kebabCase(entry.data.section) or a precomputed const like const sectionSlug =
kebabCase(entry.data.section)) so both params and Astro.rewrite reference the
identical normalized section value (also ensure any other uses of
entry.data.section in this file use the slug variable).

In `@src/pages/`[section]/[page]/[tab].astro:
- Line 67: The template builds URLs using the raw entry.data.section, which can
mismatch the kebab-cased route param set earlier
(kebabCase(entry.data.section)); update the URL constructions that reference
entry.data.section (the links around where you render the page/tab URLs) to use
the kebab-cased value instead — either call kebabCase(entry.data.section) inline
or use the already-normalized section value (kebabCase(entry.data.section))
produced earlier so generated links match the static paths.

---

Nitpick comments:
In `@src/components/NavSection.tsx`:
- Around line 19-66: The DOM id for subsection NavExpandable uses the raw
subsection string which can produce invalid ids for names with spaces or special
chars; in the NavSection component update the id (and optionally the React key)
for the subsection NavExpandable from
`nav-subsection-${sectionId}-${subsection}` to use `kebabCase(subsection)`
(e.g., `nav-subsection-${sectionId}-${kebabCase(subsection)}`) so ids are
normalized and consistent with the other kebabCase usage in renderEntry/active
checks.