refactor: 死代码清理 + CDN SRI 加固 + 面包屑组件 + 代码规范文档

- 删除 7 个死模板文件 (products/services/quality/process/projects/customization/rfq)
- 删除 13 个旧图片素材 (jpg/png/webp)
- 新增 CDN SRI 完整性校验 (Bootstrap CSS/JS)
- 新增面包屑导航模板组件
- 新增代码清理方案与代码审查标准文档
- 更新 README.md

header.php

@@ -29,11 +29,11 @@ $fragrance_rfq_url = home_url( '/contact/' );
 				<svg class="navbar-icon" width="44" height="44" aria-hidden="true"><use href="#navbar-icon"></use></svg>
 			</button>
 			<div class="offcanvas offcanvas-end" tabindex="-1" id="fragrance-navigation" aria-labelledby="fragrance-navigation-title">
-				<div class="offcanvas-header px-4 pb-0">
-					<span class="h5 offcanvas-title" id="fragrance-navigation-title"><?php echo esc_html( get_bloginfo( 'name' ) ); ?></span>
+				<div class="offcanvas-header">
+					<span class="offcanvas-title h5" id="fragrance-navigation-title"><?php echo esc_html( get_bloginfo( 'name' ) ); ?></span>
 					<button type="button" class="btn-close" data-bs-dismiss="offcanvas" aria-label="<?php esc_attr_e( '关闭导航', 'fragrance-trade' ); ?>"></button>
 				</div>
-				<div class="offcanvas-body align-items-center">
+				<div class="offcanvas-body">
 					<?php wp_nav_menu( array( 'theme_location' => 'primary', 'menu_class' => 'navbar-nav justify-content-end flex-grow-1 gap-xl-4 pe-xl-3', 'container' => false, 'fallback_cb' => false ) ); ?>
 					<a class="btn b2b-header-cta ms-xl-3" href="<?php echo esc_url( $fragrance_rfq_url ); ?>"><?php esc_html_e( '预约', 'fragrance-trade' ); ?></a>
 				</div>