perf(backend): jsdom、happy-domをやめて軽量な実装にし、メモリ削減・高速化 (#16885)

* wip

* Update packages/backend/src/server/api/endpoints/i/update.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update packages/backend/src/core/FetchInstanceMetadataService.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* remove some packages

* コミット漏れ

* clean up

* fix

* Update MfmService.ts

* fix

* fix

* Update MfmService.ts

* wip

* rename

* Update packages/backend/src/core/MfmService.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update packages/backend/src/core/MfmService.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update packages/backend/src/core/MfmService.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update packages/backend/src/core/MfmService.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update packages/backend/src/core/activitypub/ApRendererService.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update packages/backend/src/core/MfmService.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update packages/backend/src/core/MfmService.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update MfmService.ts

* Update CHANGELOG.md

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/packages/backend/src/misc/escape-html.ts b/packages/backend/src/misc/escape-html.ts
new file mode 100644
index 0000000000..819aeeed52
--- /dev/null
+++ b/packages/backend/src/misc/escape-html.ts
@@ -0,0 +1,13 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export function escapeHtml(text: string): string {
+	return text
+		.replace(/&/g, '&')
+		.replace(/</g, '&lt;')
+		.replace(/>/g, '&gt;')
+		.replace(/"/g, '&quot;')
+		.replace(/'/g, '&#039;');
+}