Bug: `getImageUrl()` produces double slashes when `assetsImagesPath` has a trailing slash

[roshinit-a]

Description

getImageUrl() in web-components/src/signals/app.ts produces URLs with double slashes when assetsImagesPath ends with a trailing /.

export const getImageUrl = (fileName: string) => {
  return `${assetsImagesPath.get()}/${fileName}`
  //           ^^ no trim here ^^  ^ always adds slash
}

Current Behaviour

assetsImagesPath.set("/assets/")
getImageUrl("logo.png") // Returns "/assets//logo.png" ❌

This is already acknowledged in web-components/src/signals/app.test.ts with the comment "// Double slash - might be a bug in implementation", but the test accepts the incorrect output rather than asserting the correct one.

Expected Behaviour

assetsImagesPath.set("/assets/")
getImageUrl("logo.png") // Should return "/assets/logo.png" ✅

assetsImagesPath.set("/assets")
getImageUrl("logo.png") // Should return "/assets/logo.png" ✅

Proposed Fix

Trim a trailing slash from the path before interpolation:

 export const getImageUrl = (fileName: string) => {
-  return `${assetsImagesPath.get()}/${fileName}`
+  return `${assetsImagesPath.get().replace(/\/+$/, "")}/${fileName}`
 }

And update the corresponding test to assert the correct (non-doubled) URL instead of the broken one.