feat: email unsubscription

[younocode]

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[Copilot]

Pull Request Overview

Introduce email unsubscription capabilities across the OpenAPI client, UI strings, and backend routing.

• Add OpenAPI routes and client functions for unsubscribe get/update, listing, export, and import.
• Extend i18n strings with unsubscribe-related texts.
• Add Next.js SSR catch-all route for unsubscribe pages and introduce mail encryption config.

Reviewed Changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated 11 comments.

Show a summary per file

File	Description
packages/openapi/src/unsubscribe/update.ts	Adds POST route and client to update subscription status by token.
packages/openapi/src/unsubscribe/index.ts	Re-exports unsubscribe module APIs.
packages/openapi/src/unsubscribe/import-list.ts	Adds route and client for importing unsubscribe lists.
packages/openapi/src/unsubscribe/get.ts	Adds GET route and client to fetch unsubscribe info by token; introduces related types.
packages/openapi/src/unsubscribe/get-list.ts	Adds GET route and client to fetch paginated unsubscribe list.
packages/openapi/src/unsubscribe/export-list.ts	Adds route and client for exporting unsubscribe list.
packages/openapi/src/mail/types.ts	Adds AutomationSendEmailAction mail type.
packages/openapi/src/index.ts	Exposes unsubscribe APIs from root index.
packages/common-i18n/src/locales/*/common.json	Adds unsubscribe-related UI texts and labels in multiple locales.
apps/nestjs-backend/src/features/next/next.controller.ts	Adds Next.js SSR route pattern for unsubscribe pages.
apps/nestjs-backend/src/configs/mail.config.ts	Adds mail encryption config (algorithm, key, IV, encoding).

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