Pre-computes date counts for timestamp-mode posts to avoid per-post DB queries.

Returns a map of %{date_string => count} for use with build_post_url/4 and format_post_date/3.

Builds a post URL based on mode. Omits the locale prefix when the site is effectively single-language. Can also omit the default-language prefix when that setting is enabled.

For slug mode posts, uses the language-specific URL slug (from post.url_slug or post.language_slugs[language]) for SEO-friendly localized URLs.

For timestamp mode posts:

• If only one post exists on the date, uses date-only URL (e.g., /group/2025-12-09)
• If multiple posts exist on the date, includes time (e.g., /group/2025-12-09/16:26)

Builds a public path with explicit date and time (always includes time). Used when redirecting from date-only URLs to full timestamp URLs.

Builds language data for the publishing_language_switcher component on public pages. Converts the @translations assign to the format expected by the component.

Extracts and renders an excerpt from post content. Returns content before <!-- more --> tag, or first paragraph if no tag. Renders markdown and strips HTML tags for plain text display.

Resolves a featured image URL for a post, falling back to the original variant.

Formats a date for display using locale-aware month names.

Formats a date for URL.

Formats a date with time for display. Used when multiple posts exist on the same date.

Formats a post's publication date, including time only when multiple posts exist on the same date.

Formats time for URL (HH:MM).

Builds the public URL for a group listing page. Omits the locale prefix when the site is effectively single-language. Can also omit the default-language prefix when that setting is enabled.

Checks if a post has a publication date to display. For timestamp mode, the date comes from the DB fields. For slug mode, it comes from metadata.published_at.

Pluralizes a word based on count.

Resolves the exact language-switcher code to highlight on public pages.