Extension Refactor Task Graph

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Kernel:

• Config loading and precedence.

• Extension catalog, plan validation, capability conflict checks, and route mounting.

• Request/render context accessors.

• Declared asset serving and extension static route plumbing.

Default extensions:

• default_layout: document shell and page frame.

• default_theme: theme preset and token loading.

• default_search: index, ranking, sidebar search, and preview cards.

• blog_home: fallback post-card home feed.

• filesystem: local content roots, folder notes, tree projection, and raw path resolution.

• filesystem_routes: raw/download routes.

• markdown: markdown pipeline, processors, and fence dispatch.

• wikilinks, tabs, mermaid, d2, cytograph, cryptograph, tasks: markdown feature adapters.

• slides, annotations, bookmarks, auth_routes, rbac_admin, sidebar_routes: feature route owners.

Kernel exceptions still present:

• core.py still assembles home, search, sidebar, page layout, auth wiring, and document routes.

• layout_page.py is still a kitchen-args page renderer, not a deep PageFrame.

• helpers.py still knows filesystem and content-root policy.