fix(dashboard): support more decimals for tx rates (#13407)

* Percentage formatter set maximum digits to 4

* Modify Tax Region Forms to allow 4 digits tax rates

* Add changeset

* Revert placeholder value to use only 2 decimals

* fix(dashboard): support more decimals for tx rates

* changeset

* bypass scale

* refactor

* fix removal of deprecated input

* cleanup deprecated percentage input

* small mistake in onchange

* add deprecated percentage input back

* import

* remove file extension

* frane comment

---------

Co-authored-by: AmbroziuBaban <ambroziubaban@gmail.com>

packages/admin/dashboard/src/lib/number-helper.ts

@@ -0,0 +1,19 @@
+/**
+ * Gets the number of decimal places in a number
+ * @param num - The number for which we are getting the number of decimal places
+ * @returns The number of decimal places
+ *
+ * @example
+ * getDecimalPlaces(123.456) // 3
+ * getDecimalPlaces(42) // 0
+ * getDecimalPlaces(10.0000) // 0
+ */
+export function getNumberOfDecimalPlaces(num: number): number {
+  // Convert to string and check if it contains a decimal point
+  const str = num.toString()
+  if (str.indexOf(".") === -1) {
+    return 0
+  }
+  // Return the length of the part after the decimal point
+  return str.split(".")[1].length
+}

packages/admin/dashboard/src/lib/percentage-helpers.ts

@@ -1,6 +1,7 @@
 const formatter = new Intl.NumberFormat([], {
   style: "percent",
   minimumFractionDigits: 2,
+  maximumFractionDigits: 4,
 })
 
 /**