build(deps): upgrade docs site toolchain to clear Dependabot alerts

[Roger-luo]

Summary

Resolves all 66 open Dependabot alerts (19 high, 36 medium, 11 low). Every one of them was in docs/package-lock.json — the Astro/Starlight documentation site's npm dependency tree (vite, rollup, esbuild, tar-fs, cross-spawn, astro, nanoid, cookie, path-to-regexp, prismjs, …). None touched the Julia package.

Clearing every alert required Astro ≥ 6.4.6, and the latest Starlight pins Astro 7, so this is a real toolchain upgrade rather than a lockfile patch.

Changes (all under docs/)

File	Change
package.json	astro ^4.10 → ^7.0.7, @astrojs/starlight ^0.25 → ^0.41.3, @astrojs/check → ^0.9.9, marked → ^18, sharp → ^0.35; typescript pinned ^5.9.3 (TS 7 is unsupported by @astrojs/check). Dropped @astropub/md (unmaintained; its @astrojs/markdown-remark ^5 peer conflicts with Astro 7).
src/components/ApiDoc.astro	Render API docstrings with the already-present marked (set:html) instead of @astropub/md's <Markdown>.
src/content.config.ts (renamed from src/content/config.ts)	Migrated to Astro's content layer using Starlight's docsLoader().
astro.config.mjs	Updated Starlight social to the array-of-links format (0.41 breaking change).
package-lock.json	Regenerated.

Verification

• npm ci → lockfile consistent with package.json.
• npm audit → found 0 vulnerabilities (same GitHub Advisory DB Dependabot uses).
• astro check → 0 errors, 0 warnings, 0 hints.
• astro build → 22 pages built, including the three /api/* pages that use the migrated ApiDoc.astro.

The alerts will auto-close once this lands on main.

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
moshi-jl	Ready	Preview, Comment	Jul 12, 2026 6:12pm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.70%. Comparing base (16c3497) to head (acfbfa0).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #84   +/-   ##
=======================================
  Coverage   91.70%   91.70%           
=======================================
  Files          43       43           
  Lines        1663     1663           
=======================================
  Hits         1525     1525           
  Misses        138      138           

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[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	main	acfbfa0...	main / acfbfa0...
adt_transform/transform n=100	6.64 ± 0.12 μs	7.08 ± 0.14 μs	0.938 ± 0.025
adt_transform/transform n=1000	0.0647 ± 0.00079 ms	0.0685 ± 0.0009 ms	0.945 ± 0.017
linked_list/sum n=100	0.47 ± 0.01 μs	0.471 ± 0 μs	0.998 ± 0.021
linked_list/sum n=1000	5.12 ± 0.049 μs	5.15 ± 0.05 μs	0.994 ± 0.014
time_to_load	0.0765 ± 0.00047 s	0.0769 ± 0.0012 s	0.994 ± 0.017

Memory benchmarks

	main	acfbfa0...	main / acfbfa0...
adt_transform/transform n=100	0.204 k allocs: 6.34 kB	0.204 k allocs: 6.34 kB	1
adt_transform/transform n=1000	2.02 k allocs: 0.0619 MB	2.02 k allocs: 0.0619 MB	1
linked_list/sum n=100	0 allocs: 0 B	0 allocs: 0 B
linked_list/sum n=1000	0 allocs: 0 B	0 allocs: 0 B
time_to_load	0.145 k allocs: 11 kB	0.145 k allocs: 11 kB	1