refactor(backend): アーカイブファイルの作成と解凍で同じライブラリを使用するように

[kakkokari-gtyih]

What

ZIP操作系のライブラリが２つ（ArchiverとZip.js）あるのを解消

Why

Additional info (optional)

Checklist

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

[github-actions]

このPRによるapi.jsonの差分
差分はありません。
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[coderabbitai]

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Reviewing files that changed from the base of the PR and between a7e0b90 and 582c206.

📒 Files selected for processing: 1

• packages/backend/src/queue/processors/ExportCustomEmojisProcessorService.ts

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📝 Walkthrough

ZIP書き込み用のZipArchiveを追加しました。カスタム絵文字のエクスポートはこのクラスを使い、メタデータと取得に成功した絵文字をZIPに格納してからDriveへ保存します。同じZIP内ファイル名は、取得に成功したレコードのうち最後のものを保持します。

Changes: ZIP作成とカスタム絵文字のエクスポート

Layer / File(s)	Summary
ZIP書き込みと安全性の検証 packages/backend/src/misc/zip.ts, packages/backend/test/unit/misc/zip.ts, packages/backend/package.json	ZipArchiveの作成、ファイル追加、完了・中止処理を追加しました。エントリ名、入力ファイル、出力先を検証するテストを追加し、archiverと@types/archiverを依存関係から削除しました。
カスタム絵文字のZIPエクスポート packages/backend/src/queue/processors/ExportCustomEmojisProcessorService.ts	一時ファイルのパスをレコードごとに分け、同名のZIPファイルは成功順で最後のものを保持します。メタデータと保持対象の絵文字をZIPに追加し、アーカイブを閉じてからDriveへ保存します。処理後に一時ディレクトリとアーカイブをクリーンアップします。

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Refactor

Sequence Diagram(s)

sequenceDiagram
  participant Export as ExportCustomEmojisProcessorService
  participant Zip as ZipArchive
  participant Drive
  participant Notice as 完了通知
  Export->>Zip: メタデータと取得済み絵文字を追加
  Zip-->>Export: ZIPを完成
  Export->>Drive: ZIPを保存
  Export->>Notice: 完了を通知

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Merge Risk: ⚪ Minimal · up to 582c2

Custom emoji export now builds the ZIP with the same library used for extraction. No actionable merge-blocking risk is apparent from the supplied changes.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 2 functions across 3 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Title check		タイトルは、ArchiverとZip.jsを統合し、ZIP作成と解凍で同じライブラリを使用する主要変更を明確に示しています。
Description check		What、チェックリスト、テスト追加の記載があります。Whyセクションは未記入ですが、変更目的はWhatの内容から確認でき、説明は全体として変更内容に関連しています。
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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_{メタデータを先頭に添えて
絵文字のファイルを並べます
同じ名前なら最後を残し
閉じたZIPをDriveへ渡します
作業のあとに一時ファイルを片づけます}

_{Comment @coderabbitai help to get the list of available commands.}

[codecov]

Codecov Report

❌ Patch coverage is 56.33803% with 31 lines in your changes missing coverage. Please review.
✅ Project coverage is 26.32%. Comparing base (d43954b) to head (582c206).
⚠️ Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
...e/processors/ExportCustomEmojisProcessorService.ts	0.00%	27 Missing and 2 partials ⚠️
packages/backend/src/misc/zip.ts	95.23%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #18020      +/-   ##
===========================================
- Coverage    26.44%   26.32%   -0.12%     
===========================================
  Files         1159     1159              
  Lines        39773    39825      +52     
  Branches     10961    10973      +12     
===========================================
- Hits         10519    10485      -34     
- Misses       23480    23557      +77     
- Partials      5774     5783       +9     

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[github-actions]

⚙️ Backend Diagnostics Report

Memory: After GC

(No significant changes)

V8 Heap Snapshot Statistics

Metric	@ Base	@ Head	Δ	MAD
$\color{gray}{\rule{8pt}{8pt}}$ Total	84 MB ± 7.5 KB	84 MB ± 6.9 KB	$\text{+74 KB}$ $\text{+0.1\%}$	10 KB
$\color{orange}{\rule{8pt}{8pt}}$ Code	24 MB	24 MB	$\text{+70 KB}$	9.8 KB
$\color{red}{\rule{8pt}{8pt}}$ Strings	29 MB	29 MB	$\text{+264 B}$	1.2 KB
$\color{cyan}{\rule{8pt}{8pt}}$ JS arrays	5.4 MB	5.4 MB	0 B	0 B
$\color{green}{\rule{8pt}{8pt}}$ Typed arrays	543 KB	543 KB	0 B	0 B
$\color{yellow}{\rule{8pt}{8pt}}$ System objects	2.2 MB	2.2 MB	$\text{+4.9 KB}$	1.2 KB
$\color{violet}{\rule{8pt}{8pt}}$ Other JS objs	23 MB	23 MB	$\text{-88 B}$	228 B
$\color{pink}{\rule{8pt}{8pt}}$ Other non-JS objs	39 KB	39 KB	0 B	0 B

Download representative heap snapshot: base / head

[github-actions]

🖥 Frontend Diagnostics Report

(No significant changes)

View details

Requests by resource type

Type	Requests			Encoded bytes
	Base	Head	Δ	Base	Head	Δ
Document	2	2	0	33 KB	33 KB	0 B
Script	148	148	0	2.1 MB	2.1 MB	0 B
Stylesheet	58	58	0	284 KB	284 KB	0 B
Fetch	20	20	0	46 KB	46 KB	0 B
Image	10	10	0	254 KB	254 KB	0 B
Font	2	2	0	118 KB	118 KB	0 B
Other	9	9	0	421 KB	421 KB	$\color{green}{\text{-4 B}}$

V8 heap snapshot statistics

Metric	@ Base	@ Head	Δ	MAD
$\color{gray}{\rule{8pt}{8pt}}$ Total	11 MB ± 3.8 KB	11 MB ± 1.7 KB	$\text{-812 B}$ $\text{-0\%}$	4.1 KB
$\color{orange}{\rule{8pt}{8pt}}$ Code	2.8 MB	2.8 MB	$\text{-1.3 KB}$	1.1 KB
$\color{red}{\rule{8pt}{8pt}}$ Strings	1.2 MB	1.2 MB	$\text{+16 B}$	119 B
$\color{cyan}{\rule{8pt}{8pt}}$ JS arrays	113 KB	113 KB	0 B	0 B
$\color{green}{\rule{8pt}{8pt}}$ Typed arrays	0 B	0 B	0 B	0 B
$\color{yellow}{\rule{8pt}{8pt}}$ System objects	0 B	0 B	0 B	0 B
$\color{violet}{\rule{8pt}{8pt}}$ Other JS objs	2 MB	2 MB	$\text{-32 B}$	196 B
$\color{pink}{\rule{8pt}{8pt}}$ Other non-JS objs	5 MB	5 MB	$\text{-1.7 KB}$	3.5 KB

Download representative heap snapshot: base / head

📦 Bundle Stats

Chunk size diff (0 updated, 0 added, 0 removed)

Chunk	Base	Head	Δ	Δ (%)
(total)	5.9 MB	5.9 MB	0 B	0%
(other generated chunks)	2 MB	2 MB	0 B	0%

Startup chunk size (0 updated, 0 added, 0 removed)

Chunk	Base	Head	Δ	Δ (%)
(total)	1 MB	1 MB	0 B	0%
(other generated chunks)	757 KB	757 KB	0 B	0%
(other)	283 KB	283 KB	0 B	0%

Startup chunks are the Vite entry for src/_boot_.ts and its static imports.

	Bundles	Modules	Entries	Imports		Size
				Static	Dynamic	Rendered	Gzip	Brotli
Base	469	2,855	21	10,334	333	10 MB	2.8 MB	2.4 MB
Head	469	2,855	21	10,334	333	10 MB	2.8 MB	2.4 MB
Δ	0	0	0	0	0	0 B	$\text{-10 B}$	$\text{-32 B}$
Δ (%)	0%	0%	0%	0%	0%	0%	$\text{-0\%}$	$\text{-0\%}$

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[coderabbitai]

Actionable comments posted: 1

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📥 Commits

Reviewing files that changed from the base of the PR and between 8e07cf0 and a7e0b90.

⛔ Files ignored due to path filters: 1

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing: 4

• packages/backend/package.json
• packages/backend/src/misc/zip.ts
• packages/backend/src/queue/processors/ExportCustomEmojisProcessorService.ts
• packages/backend/test/unit/misc/zip.ts

💤 Files with no reviewable changes: 1

• packages/backend/package.json

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