Remove magic 10% scale on numeric widget step (#643)

There are external code still dependent on the fact that
Widget.options.step is scaled 10x, so the 10x-ed value is still kept
there, while we use the new unscaled step2 within our code now.

Ref:
https://cs.comfy.org/search?q=context:global+%22step+/+10%22&patternType=keyword&sm=0

test/utils/widget.test.ts

@@ -0,0 +1,45 @@
+import type { IWidgetOptions } from "@/types/widgets"
+
+import { describe, expect, test } from "vitest"
+
+import { getWidgetStep } from "@/utils/widget"
+
+describe("getWidgetStep", () => {
+  test("should return step2 when available", () => {
+    const options: IWidgetOptions<unknown> = {
+      step2: 0.5,
+      step: 20,
+    }
+
+    expect(getWidgetStep(options)).toBe(0.5)
+  })
+
+  test("should calculate from step when step2 is not available", () => {
+    const options: IWidgetOptions<unknown> = {
+      step: 20,
+    }
+
+    expect(getWidgetStep(options)).toBe(2) // 20 * 0.1 = 2
+  })
+
+  test("should use default step value of 10 when neither step2 nor step is provided", () => {
+    const options: IWidgetOptions<unknown> = {}
+
+    expect(getWidgetStep(options)).toBe(1) // 10 * 0.1 = 1
+  })
+  // Zero value is not allowed for step, fallback to 1.
+  test("should handle zero values correctly", () => {
+    const optionsWithZeroStep2: IWidgetOptions<unknown> = {
+      step2: 0,
+      step: 20,
+    }
+
+    expect(getWidgetStep(optionsWithZeroStep2)).toBe(2)
+
+    const optionsWithZeroStep: IWidgetOptions<unknown> = {
+      step: 0,
+    }
+
+    expect(getWidgetStep(optionsWithZeroStep)).toBe(1)
+  })
+})