Add keyboard shortcuts for POS operations

POS/src/main.js

@@ -229,3 +229,77 @@ async function initializeApp() {
 }
 
 initializeApp()
+
+window.addEventListener('keydown', function (e) {
+
+	const key = e.key.toLowerCase()
+	const active = document.activeElement
+
+	//  Prevent shortcuts while typing
+	if (active && (
+		active.tagName === "INPUT" ||
+		active.tagName === "TEXTAREA" ||
+		active.isContentEditable
+	)) {
+		return
+	}
+
+	const boxShortcuts = {
+		'o': "View Shift",
+		'd': "Draft Invoices",
+		'i': "Invoice History",
+		'k': "Return Invoice",
+		'p': "Close Shift",
+		'f': "Create Customer"
+	}
+
+	//  Box Actions
+	if (e.ctrlKey && boxShortcuts[key]) {
+		e.preventDefault()
+		e.stopPropagation()
+
+		const targetText = boxShortcuts[key]
+
+		setTimeout(() => {
+			const btn = Array.from(document.querySelectorAll("button"))
+				.find(b => b.innerText?.trim().toLowerCase() === targetText.toLowerCase())
+
+			if (btn) btn.click()
+		}, 300)
+
+		return
+	}
+
+	//  Focus Item Search
+	if (e.ctrlKey && key === 'b') {
+		e.preventDefault()
+
+		const input = document.querySelector('input[placeholder*="Search"]')
+		input?.focus()
+		return
+	}
+
+	//  Focus Customer Search
+	if (e.ctrlKey && key === 'u') {
+		e.preventDefault()
+
+		const input = document.querySelector('input[placeholder*="customer"]')
+		input?.focus()
+		return
+	}
+
+	//  Promotion Popup
+	if (e.ctrlKey && e.shiftKey && key === 'x') {
+		e.preventDefault()
+
+		const btn = Array.from(document.querySelectorAll("button"))
+			.find(b => 
+				b.innerText?.toLowerCase().includes("promotion") ||
+				b.innerText?.toLowerCase().includes("coupon")
+			)
+
+		if (btn) btn.click()
+		return
+	}
+
+}, true)