Migrate WorldMap to d3-geo, fix TopoJSON country ID mappings and update tests

frontend/src/components/__tests__/WorldMap.test.tsx

@@ -8,16 +8,31 @@ import { describe, expect, it, vi } from "vitest";
 import { fireEvent, render, screen } from "@testing-library/react";
 import { FluentProvider, webLightTheme } from "@fluentui/react-components";
 
-// Mock react-simple-maps to avoid fetching real TopoJSON and to control geometry.
-vi.mock("react-simple-maps", () => ({
-  ComposableMap: ({ children }: { children: React.ReactNode }) => <div>{children}</div>,
-  ZoomableGroup: ({ children }: { children: React.ReactNode }) => <div>{children}</div>,
-  Geography: ({ children, ...props }: { children?: React.ReactNode } & Record<string, unknown>) => <g {...props}>{children}</g>,
-  useGeographies: () => ({
-    geographies: [{ rsmKey: "geo-1", id: 840 }],
-    path: { centroid: () => [10, 10] },
+vi.mock(
+  "world-atlas/countries-110m.json",
+  () => ({
+    default: {
+      type: "Topology",
+      objects: {
+        countries: {
+          type: "GeometryCollection",
+          geometries: [
+            {
+              type: "Polygon",
+              arcs: [[0]],
+              id: "840",
+            },
+          ],
+        },
+      },
+      arcs: [[[0, 0], [10, 0], [10, 10], [0, 10], [0, 0]]],
+      transform: {
+        scale: [1, 1],
+        translate: [0, 0],
+      },
+    },
   }),
-}));
+);
 
 import { WorldMap } from "../WorldMap";
 
@@ -34,19 +49,20 @@ describe("WorldMap", () => {
       </FluentProvider>,
     );
 
-    // Tooltip should not be present initially
     expect(screen.queryByRole("tooltip")).toBeNull();
 
-    // Country map area is exposed as an accessible button with an accurate label
     const countryButton = screen.getByRole("button", { name: "US: 42 bans" });
     expect(countryButton).toBeInTheDocument();
 
+    expect(screen.getByRole("button", { name: /Zoom in/i })).toBeInTheDocument();
+    expect(screen.getByRole("button", { name: /Zoom out/i })).toBeInTheDocument();
+    expect(screen.getByRole("button", { name: /Reset view/i })).toBeInTheDocument();
+
     fireEvent.mouseEnter(countryButton, { clientX: 10, clientY: 10 });
 
     const tooltip = screen.getByRole("tooltip");
     expect(tooltip).toHaveTextContent("United States");
     expect(tooltip).toHaveTextContent("42 bans");
-    expect(tooltip).toHaveStyle({ left: "22px", top: "22px" });
 
     fireEvent.mouseLeave(countryButton);
     expect(screen.queryByRole("tooltip")).toBeNull();