TDD,E2E 개선, 미적용 스타일 개선

src/features/editor/utils/dividerHelpers.ts

@@ -21,7 +21,33 @@ export const computeDividerExportTokens = (
   const marginY = typeof props.marginYPx === "number" && props.marginYPx > 0 ? props.marginYPx : 16;
   const marginEm = pxToEm(marginY);
 
-  const style = `border:0;border-bottom:${thickness} solid ${escapeAttr(color)};margin:${marginEm} 0;`;
+  const widthMode = props.widthMode ?? "full";
+  const align = props.align ?? "left";
+
+  const styleParts: string[] = [];
+  styleParts.push("border:0");
+  styleParts.push(`border-bottom:${thickness} solid ${escapeAttr(color)}`);
+  styleParts.push(`margin:${marginEm} 0`);
+
+  if (widthMode === "auto") {
+    styleParts.push("width:50%");
+  } else if (widthMode === "fixed") {
+    const widthPx =
+      typeof props.widthPx === "number" && props.widthPx > 0 ? props.widthPx : 320;
+    styleParts.push(`width:${pxToEm(widthPx)}`);
+  }
+
+  if (widthMode === "auto" || widthMode === "fixed") {
+    if (align === "center") {
+      styleParts.push("margin-left:auto");
+      styleParts.push("margin-right:auto");
+    } else if (align === "right") {
+      styleParts.push("margin-left:auto");
+      styleParts.push("margin-right:0");
+    }
+  }
+
+  const style = `${styleParts.join(";")};`;
 
   return { style };
 };