Update School Show Page

[sean-dickinson]

School Show — Tabbed Nested Resources (Turbo Frames)

Requirements

• School show page is the only show page in the admin interface; it exists solely to host tabs for Students, Classrooms, Teachers.
• Each tab renders the corresponding nested resource's existing index action inside a Turbo Frame — no separate tab-specific views/partials.
• Each nested resource's index Turbo Frame id is generated via the dom_id helper (e.g. dom_id(@school, :teachers)), not a hardcoded string.
• Nested index views assume they always render inside the frame on the school show page; no requirement to support standalone/bare rendering.
• Tabs load lazily (loading: :lazy) so only the active tab's data is fetched.
• Edit/new actions for nested resources are full page navigations (not rendered inside the frame).
• On successful create/update/destroy, redirect to the school show page with the acted-on tab active via query param (e.g. school_path(@school, tab: "teachers")).
• School show page reads the tab param to determine which tab is active/expanded on initial render.