feat(core): add a two-step confirm page to create new journal (#13240)

close AF-2750;

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

* **New Features**
* Introduced a new workspace journals page with date-based navigation,
placeholder UI, and the ability to create daily journals directly from
the page.
* Added a "Today" button for quick navigation to the current day's
journal when viewing other dates.

* **Improvements**
* Enhanced the journal document title display with improved date
formatting and flexible styling.
* Expanded the active state for the journal sidebar button to cover all
journal-related routes.
* Updated journal navigation to open existing entries directly or
navigate to filtered journal listings.

* **Bug Fixes**
* Improved date handling and navigation logic for journal entries to
ensure accurate redirection and creation flows.

* **Style**
* Added new styles for the workspace journals page, including headers,
placeholders, and buttons.

* **Localization**
* Added English translations for journal placeholder text and create
journal prompts.

* **Tests**
* Added confirmation steps in journal creation flows to improve test
reliability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/components/root-app-sidebar/journal-button.tsx

@@ -21,7 +21,7 @@ export const AppSidebarJournalButton = () => {
   return (
     <MenuLinkItem
       data-testid="slider-bar-journals-button"
-      active={isJournal}
+      active={isJournal || location.pathname.startsWith('/journals')}
       to={'/journals'}
       icon={<Icon />}
     >