Address the Theme Check recommendations that are real

[puikinsh]

Folded into the unreleased 1.2.21.

Two are genuine bugs, not style points

site_url() is where the WordPress files live; home_url() is the site address. They differ whenever WordPress is installed in its own subdirectory.

file	was	effect
class-wp-bootstrap-navwalker.php:113	site_url() . $item->url	one-page section links pointed at /wp/#section
class-shapely-builder.php:105	site_url()	compared in JS against api.settings.url.preview, a front-end URL — could never match

The builder one also gains the trailing slash the preview URL carries; the unslashed site_url() could not have matched it even on a root install.

The third site_url() is deliberately left alone. The post-password form in inc/extras.php posts to wp-login.php, which genuinely does live at the WordPress files location. Changing it would break password-protected posts on exactly the installs the other two fixes help.

Block editor recommendations — implemented

• add_theme_support( 'wp-block-styles' )
• add_editor_style( 'assets/css/editor-style.css' ) — mirrors the front-end typography (Raleway 14/24, #8c979e, heading scale, #745cf9 links) so the editor resembles the result
• 3 block styles: shapely-filled, shapely-outline, shapely-short
• 2 patterns: a centred call to action and a two-column feature

The styles reuse the theme's existing .btn rules and brand colour rather than inventing a second palette, and ship as inline_style so they cost nothing on sites that never insert those blocks.

Verified on a live WordPress, not by grep:

block styles registered: 3
  core/button     ->  shapely-filled
  core/button     ->  shapely-outline
  core/separator  ->  shapely-short
block patterns registered: 2
wp-block-styles support: yes
editor styles: assets/css/editor-style.css

Also

Removed assets/css/font-awesome.css and font-awesome.min.css — two more Font Awesome 5 leftovers nothing enqueued.

Left alone, with reasons

• role="search" — shapely_search_form() is the get_search_form filter callback (add_filter at line 529). That is the mechanism the warning asks for; Theme Check only greps for the attribute.
• include/require in inc/libraries/ — all require_once( ABSPATH . 'wp-admin/…' ) core includes, not template parts.
• WP_Filesystem — inside the vendored Epsilon framework, which Theme Check itself says not to modify.
• Footer credit link — intentional.