fix: refactor dates (#1321)

## Description

Refactor the current date formatting system to utilize Lingui.

## Changes Made

- Remove redundant `LocaleData` component with Lingui dates

## Important notes

For the internal pages for certificates, default to en-US to format any
dates.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit


- **New Features**
- Enhanced internationalization support across various components by
utilizing the `i18n` object for date formatting.
- Streamlined locale management by removing cookie-based language
handling and adopting a more centralized approach.

- **Bug Fixes**
- Improved date formatting consistency by replacing the `LocaleDate`
component with direct calls to `i18n.date()` in multiple components.

- **Documentation**
- Updated localization strings in the `web.po` files to reflect recent
changes in the source code structure.

- **Chores**
- Minor formatting adjustments and code organization improvements across
various files to enhance readability and maintainability.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: github-actions <github-actions@documenso.com>

packages/lib/client-only/providers/i18n.server.tsx

@@ -1,26 +1,26 @@
 import 'server-only';
 
-import { cookies } from 'next/headers';
+import { cookies, headers } from 'next/headers';
 
 import type { I18n, Messages } from '@lingui/core';
 import { setupI18n } from '@lingui/core';
 import { setI18n } from '@lingui/react/server';
 
-import { IS_APP_WEB, IS_APP_WEB_I18N_ENABLED } from '../../constants/app';
+import { IS_APP_WEB } from '../../constants/app';
 import { SUPPORTED_LANGUAGE_CODES } from '../../constants/i18n';
-import { extractSupportedLanguage } from '../../utils/i18n';
+import { extractLocaleData } from '../../utils/i18n';
 
-type SupportedLocales = (typeof SUPPORTED_LANGUAGE_CODES)[number];
+type SupportedLanguages = (typeof SUPPORTED_LANGUAGE_CODES)[number];
 
-async function loadCatalog(locale: SupportedLocales): Promise<{
+async function loadCatalog(lang: SupportedLanguages): Promise<{
   [k: string]: Messages;
 }> {
   const { messages } = await import(
-    `../../translations/${locale}/${IS_APP_WEB ? 'web' : 'marketing'}.js`
+    `../../translations/${lang}/${IS_APP_WEB ? 'web' : 'marketing'}.js`
   );
 
   return {
-    [locale]: messages,
+    [lang]: messages,
   };
 }
 
@@ -31,18 +31,18 @@ export const allMessages = catalogs.reduce((acc, oneCatalog) => {
   return { ...acc, ...oneCatalog };
 }, {});
 
-type AllI18nInstances = { [K in SupportedLocales]: I18n };
+type AllI18nInstances = { [K in SupportedLanguages]: I18n };
 
 // eslint-disable-next-line @typescript-eslint/consistent-type-assertions
-export const allI18nInstances = SUPPORTED_LANGUAGE_CODES.reduce((acc, locale) => {
-  const messages = allMessages[locale] ?? {};
+export const allI18nInstances = SUPPORTED_LANGUAGE_CODES.reduce((acc, lang) => {
+  const messages = allMessages[lang] ?? {};
 
   const i18n = setupI18n({
-    locale,
-    messages: { [locale]: messages },
+    locale: lang,
+    messages: { [lang]: messages },
   });
 
-  return { ...acc, [locale]: i18n };
+  return { ...acc, [lang]: i18n };
 }, {}) as AllI18nInstances;
 
 /**
@@ -50,24 +50,23 @@ export const allI18nInstances = SUPPORTED_LANGUAGE_CODES.reduce((acc, locale) =>
  *
  * https://lingui.dev/tutorials/react-rsc#pages-layouts-and-lingui
  */
-export const setupI18nSSR = (overrideLang?: SupportedLocales) => {
-  let lang =
-    overrideLang ||
-    extractSupportedLanguage({
-      cookies: cookies(),
-    });
-
-  // Override web app to be English.
-  if (!IS_APP_WEB_I18N_ENABLED && IS_APP_WEB) {
-    lang = 'en';
-  }
+export const setupI18nSSR = () => {
+  const { lang, locales } = extractLocaleData({
+    cookies: cookies(),
+    headers: headers(),
+  });
 
   // Get and set a ready-made i18n instance for the given language.
   const i18n = allI18nInstances[lang];
+
+  // Reactivate the i18n instance with the locale for date and number formatting.
+  i18n.activate(lang, locales);
+
   setI18n(i18n);
 
   return {
     lang,
+    locales,
     i18n,
   };
 };