Move list partials outside the section element on bags, gear, and brews
pages so they become separate flex children of <main>, matching the
pattern used by roasters, roasts, cafes, and cups. Add mt-6 to each
partial's outer div for consistent spacing.
Standardise brew and gear list partials to match the canonical structure:
empty-state conditional with dashed amber border, <section> wrapper for
the table, and data-star-scope attribute on the outer div.
Update CLAUDE.md to document page template and list partial structure
requirements, preventing future drift.
Datastar sends all non-underscore signals with every backend request.
UI-only signals (showForm, navOpen, isSubmitting, form ref, brew
parameters) were being serialized into pagination/search/sort URLs,
creating bloated requests. Prefix them with _ so Datastar's default
filterSignals excludes them from requests.
