fix: populate sidebar context for pages using Page with Sidebar template, use block_template_part for footer (v1.0.6)

- ContextBuilder now calls getSidebarData() when page template slug is
  'page-sidebar', fixing empty sidebar on pages with that template
- Added block_template_part() Twig function to TwigService for FSE
  Template Editor compatibility
- Changed footer rendering from include to block_template_part() so
  footer edits in the Template Editor take effect

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented in this file.
 
+## [1.0.6] - 2026-02-14
+
+### Fixed
+
+- Sidebar widgets not rendered on pages using the "Page with Sidebar" template — `ContextBuilder::build()` only populated `sidebar` context for `is_home()`, so `page-sidebar.html.twig` received no widget data
+
 ## [1.0.5] - 2026-02-11
 
 ### Added