Classes Page, Mostly Complete

[theosiemensrhodes]

PR: Classes list & edit; Tailwind + shadcn migration

TL;DR

• Moved UI from SCSS to Tailwind v4 + shadcn ui/
• Implemented /classes (grid) and /classes/edit (form) on new primitives.

Dev Notes

• Use components from src/components/primitives/* and compose with Tailwind classes.
• Forms use react-hook-form wrappers (Form*) and the Field system for labels/errors.
• Date inputs use react-day-picker + date-fns.
• Legacy SCSS/layouts removed; avoid adding new SCSS.

After Pull

1. pnpm install
2. pnpm run dev
3. Verify:
   • /classes renders grid + sidebar actions.
   • /classes/edit?class=<id> loads defaults, validates, and submits.

Key Files

• Config: tailwind.config.ts, postcss.config.mjs, components.json, src/styles/globals.css
• Pages: app/(authorized)/classes/page.tsx, app/(authorized)/classes/edit/page.tsx, .../edit/template.tsx
• Primitives/Form: src/components/primitives/*, src/components/form/*