fix(backend): /api-doc にアクセスできない問題を修正

[Copilot]

What

Fix staticAssets path resolution in OpenApiServerService.ts to use the same root-finding approach already used in ClientServerService.ts.

Why

PR #17054 (minify backend) switched the build from per-file tsc output to a single esbuild bundle at built/boot/entry.js. OpenApiServerService.ts was still resolving the assets path relative to import.meta.url:

// Before: breaks when bundled — import.meta.url is now built/boot/entry.js,
// so ../../../../assets/ walks up to repo root, not packages/backend/
const staticAssets = fileURLToPath(new URL('../../../../assets/', import.meta.url));

ClientServerService.ts was updated in the same PR to walk up the tree to find the repo root, but OpenApiServerService.ts was missed, causing reply.sendFile('/api-doc.html', staticAssets) to look in the wrong directory and return 404.

// After: resolves correctly regardless of bundle location
let rootDir = _dirname;
while (!fs.existsSync(resolve(rootDir, 'packages'))) {
    const parentDir = dirname(rootDir);
    if (parentDir === rootDir) throw new Error('Cannot find root directory');
    rootDir = parentDir;
}
const staticAssets = resolve(rootDir, 'packages/backend/assets');

Additional info (optional)

Related: #17054 introduced the build change; /api.json was unaffected since it generates content dynamically.

Checklist

• Read the contribution guide
• Test working in a local environment
• (If needed) Update CHANGELOG.md
• (If possible) Add tests

---

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[syuilo]

/preview

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 61.74%. Comparing base (9377e94) to head (e390036).
⚠️ Report is 18 commits behind head on develop.

Files with missing lines	Patch %	Lines
...end/src/server/api/openapi/OpenApiServerService.ts	87.50%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #17267      +/-   ##
===========================================
- Coverage    63.57%   61.74%   -1.83%     
===========================================
  Files         1161     1161              
  Lines       116244   116324      +80     
  Branches      8371     8062     -309     
===========================================
- Hits         73900    71824    -2076     
- Misses       40159    42314    +2155     
- Partials      2185     2186       +1     

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[github-actions]

このPRによるapi.jsonの差分
差分はありません。
Get diff files from Workflow Page

[github-actions]

Backend memory usage comparison

Before GC

Metric	base (MB)	head (MB)	Diff (MB)	Diff (%)
VmRSS	315.09 MB	326.96 MB	+11.86 MB	+3.76%
VmHWM	315.09 MB	326.96 MB	+11.86 MB	+3.76%
VmSize	23108.92 MB	23118.51 MB	+9.58 MB	+0.04%
VmData	1378.72 MB	1389.10 MB	+10.37 MB	+0.75%

After GC

Metric	base (MB)	head (MB)	Diff (MB)	Diff (%)
VmRSS	315.09 MB	326.96 MB	+11.86 MB	+3.76%
VmHWM	315.09 MB	326.96 MB	+11.86 MB	+3.76%
VmSize	23108.92 MB	23118.51 MB	+9.58 MB	+0.04%
VmData	1378.72 MB	1389.10 MB	+10.37 MB	+0.75%

After Request

Metric	base (MB)	head (MB)	Diff (MB)	Diff (%)
VmRSS	315.41 MB	327.33 MB	+11.92 MB	+3.77%
VmHWM	315.41 MB	327.33 MB	+11.92 MB	+3.77%
VmSize	23108.92 MB	23118.51 MB	+9.58 MB	+0.04%
VmData	1378.72 MB	1389.10 MB	+10.37 MB	+0.75%

See workflow logs for details

[kakkokari-gtyih]

なおした

[syuilo]

🙏🏻