feat(pure): parseTarget with comma and magnitude suffix support

src/pure.js

@@ -0,0 +1,28 @@
+const SUFFIXES = { k: 1e3, m: 1e6, b: 1e9, t: 1e12 };
+
+export function parseTarget(input) {
+  if (input === null || input === undefined || input === '') return null;
+
+  if (typeof input === 'number') {
+    if (!Number.isFinite(input) || input <= 0) return null;
+    return Math.floor(input);
+  }
+
+  if (typeof input !== 'string') return null;
+
+  const cleaned = input.replace(/,/g, '').trim().toLowerCase();
+  if (cleaned === '') return null;
+
+  // Reject anything other than digits, optional decimal, and optional single trailing suffix letter
+  if (!/^\d+(\.\d+)?[kmbt]?$/.test(cleaned)) return null;
+
+  const match = cleaned.match(/^(\d+(?:\.\d+)?)([kmbt])?$/);
+  if (!match) return null;
+
+  const num = parseFloat(match[1]);
+  if (!Number.isFinite(num) || num <= 0) return null;
+
+  const suffix = match[2];
+  const multiplier = suffix ? SUFFIXES[suffix] : 1;
+  return Math.floor(num * multiplier);
+}