Write a function `deepMerge(target, source)` that deeply merges source into target. Arrays are replaced, objects are recursively merged.

💡 Hint 1: If both values are plain objects, merge recursively. 💡 Hint 2: If either is not an object, the source value wins. 💡 Hint 3: For each key in source, check if both target[key] and source[key] are objects, then recurse. ✅ Solution: ```javascript function deepMerge(target, source) { const result = { ...target }; for (const key in source) { if (typeof source[key] === "object" && source[key] !== null && !Array.isArray(source[key]) && typeof result[key] === "object" && result[key] !== null && !Array.isArray(result[key])) { result[key] = deepMerge(result[key], source[key]); } else { result[key] = source[key]; } } return result; } ```