fix: global fix for all svg buttons

tests/renderer/globalSvgButtonPointerEvents.test.ts

@@ -0,0 +1,13 @@
+import { describe, expect, it } from 'vitest';
+import * as fs from 'node:fs';
+import * as path from 'node:path';
+
+describe('Global SVG button pointer-events styles', () => {
+  const cssPath = path.resolve(__dirname, '../../src/renderer/styles/global.css');
+
+  it('routes pointer events through buttons instead of nested SVG geometry', () => {
+    const css = fs.readFileSync(cssPath, 'utf8');
+
+    expect(css).toMatch(/button\s+svg\s*,\s*button\s+svg\s*\*\s*\{[^}]*pointer-events:\s*none;[^}]*\}/s);
+  });
+});