Add keyboard shortcuts help modal ⌨️

[anoopcodehack]

Add keyboard shortcuts help modal ⌨️

File: client/src/pages/Dashboard.jsx

App has keyboard shortcuts but
nobody knows about them 💀 fr!!
No cheatsheet anywhere!!

Fix: add a "?" button in navbar:
const [showHelp, setShowHelp] = useState(false)

<button onClick={() => setShowHelp(true)}
className="text-xs text-[#666] hover:text-[#aaa]
px-2 py-1 border border-[#2a2a2f] rounded-lg">
⌨️ ?

{showHelp && (

setShowHelp(false)}>
Keyboard Shortcuts

N — New task

ESC — Close modal

? — Toggle this menu

)}
~15 lines! No backend needed 🎯