Replace ~268 hardcoded text-stone-* classes with theme-aware token
utilities (text-text, text-text-secondary, text-text-muted) across all
templates and JS components. Adjust dark mode token values to meet
WCAG AA contrast ratios on dark surfaces.
Move 9 page templates to templates/pages/, nav to partials/,
7 list partials + table.html to partials/lists/. Extract duplicated
scan result form (~85 lines) from home.html and add.html into
partials/forms/scan_result_form.html. Update all Askama template
paths, include/import directives.
