feat(ui): use fake timer in tests and real timer in browser for storybook interaction tests

I believe the time-based tests are falsely failing when the CI machine is under high load. This also speeds up the tests in CI.

I'm not 100% happy with the approach, but this should resolve CI issues in the short term until I can improve things.

pkgs/clan-app/ui/package.json

@@ -25,12 +25,14 @@
     "@babel/plugin-syntax-import-attributes": "^7.27.1",
     "@eslint/js": "^9.3.0",
     "@kachurun/storybook-solid-vite": "^9.0.11",
+    "@sinonjs/fake-timers": "^14.0.0",
     "@storybook/addon-a11y": "^9.0.8",
     "@storybook/addon-docs": "^9.0.8",
     "@storybook/addon-links": "^9.0.8",
     "@storybook/addon-viewport": "^9.0.8",
     "@storybook/addon-vitest": "^9.0.8",
     "@types/node": "^22.15.19",
+    "@types/sinonjs__fake-timers": "^8.1.5",
     "@types/three": "^0.176.0",
     "@typescript-eslint/parser": "^8.32.1",
     "@vitest/browser": "^3.2.3",