[FIX] pivot: ensure correct format status in menu

Since PR#4657, users can define a custom format for pivot measures by
selecting a cell with a measure value and applying a format.

However, the format menu's tick status incorrectly displayed "Automatic"
even after applying a custom format. This was caused by the getCell
method fetching the cell format, which does not account for pivot
measure-specific formats.

This fix ensures the format menu reflects the correct status by
properly handling pivot cell measure formats.

Task: 4373606

src/actions/format_actions.ts

@@ -396,13 +396,21 @@ function fontSizeMenuBuilder(): ActionSpec[] {
 }
 
 function isAutomaticFormatSelected(env: SpreadsheetChildEnv): boolean {
-  const activeCell = env.model.getters.getCell(env.model.getters.getActivePosition());
-  return !activeCell || !activeCell.format;
+  const activePosition = env.model.getters.getActivePosition();
+  const pivotCell = env.model.getters.getPivotCellFromPosition(activePosition);
+  if (pivotCell.type === "VALUE") {
+    return !env.model.getters.getEvaluatedCell(activePosition).format;
+  }
+  return !env.model.getters.getCell(activePosition)?.format;
 }
 
 function isFormatSelected(env: SpreadsheetChildEnv, format: string): boolean {
-  const activeCell = env.model.getters.getCell(env.model.getters.getActivePosition());
-  return activeCell?.format === format;
+  const activePosition = env.model.getters.getActivePosition();
+  const pivotCell = env.model.getters.getPivotCellFromPosition(activePosition);
+  if (pivotCell.type === "VALUE") {
+    return env.model.getters.getEvaluatedCell(activePosition).format === format;
+  }
+  return env.model.getters.getCell(activePosition)?.format === format;
 }
 
 function isFontSizeSelected(env: SpreadsheetChildEnv, fontSize: number): boolean {

tests/formats/formatting_plugin.test.ts

@@ -31,7 +31,7 @@ import {
   getEvaluatedCell,
   getEvaluatedGrid,
 } from "../test_helpers/getters_helpers";
-import { createModelFromGrid, target } from "../test_helpers/helpers";
+import { createModelFromGrid, getNode, makeTestEnv, target } from "../test_helpers/helpers";
 import { addPivot } from "../test_helpers/pivot_helpers";
 
 function setDecimal(model: Model, targetXc: string, step: SetDecimalStep) {
@@ -371,6 +371,24 @@ describe("pivot contextual formatting", () => {
       ["Total",      "$1.00"],
     ]);
   });
+
+  test("topbar menu correctly indicates the format of the selected pivot cell", () => {
+    const env = makeTestEnv();
+    const { model } = env;
+
+    setCellContent(model, "A1", "Price");
+    setCellContent(model, "A2", "10");
+    setCellContent(model, "B1", "=PIVOT(1)");
+
+    addPivot(model, "A1:A2", {
+      measures: [{ id: "Price", fieldName: "Price", aggregator: "sum" }],
+    });
+    setContextualFormat(model, "C3", "[$$]#,##0.00");
+    selectCell(model, "C3");
+
+    const action = getNode(["format", "format_number", "format_number_currency"], env);
+    expect(action.isActive?.(env)).toBe(true);
+  });
 });
 
 describe("formatting values (when change decimal)", () => {