Grader v2.2.0

v2.2.0 — UI Improvements & Assignment Management

✨ New Features

• Collapsible top bar: ▲ collapses the bar; a small ▼ button restores it, freeing vertical space for the PDF.
• Sidebar collapse arrow: a ◀/▶ handle on the sidebar edge collapses/expands the students panel.
• Per-question Max button: one click fills the full mark for a question.
• Assignment rename & delete: ✏️ and 🗑️ buttons on the select page (with confirmation).
• Taller assignment list for easier browsing.

🛠️ Improvements

• Search returns inline in the top bar.
• Replaced the experimental hamburger/minimal layout with a cleaner collapsible top bar.