feat(ee): bases

Table and kanban UI, formula engine package, and the base-embed editor extension

apps/client/src/ee/base/components/cells/cell-value-equal.ts

@@ -0,0 +1,30 @@
+function isEmpty(v: unknown): boolean {
+  return v === null || v === undefined || v === "";
+}
+
+/**
+ * Deep equality for cell values. Treats null/undefined/"" as equivalent
+ * "empty", compares arrays by ordered content, objects by serialized form.
+ * Note: an empty array [] is a real value, distinct from "empty".
+ */
+export function cellValuesEqual(a: unknown, b: unknown): boolean {
+  const aArr = Array.isArray(a);
+  const bArr = Array.isArray(b);
+
+  if (!aArr && !bArr) {
+    if (isEmpty(a) && isEmpty(b)) return true;
+    if (isEmpty(a) !== isEmpty(b)) return false;
+  }
+
+  if (aArr || bArr) {
+    if (!aArr || !bArr) return false;
+    if (a.length !== b.length) return false;
+    return a.every((x, i) => cellValuesEqual(x, b[i]));
+  }
+
+  if (typeof a === "object" && typeof b === "object" && a && b) {
+    return JSON.stringify(a) === JSON.stringify(b);
+  }
+
+  return a === b;
+}