fix(module): replace prefix from path without leading slash

[hendrikheil]

Resolves #235

This PR should fix an issue in nuxt-studio where collections with prefixes other than / were unable to get their source properly identified by getCollectionSourceById.

Example call:

prefix: "/unternehmen/blog"
fixed: "organization-blog" 
prefixAndPath: "unternehmen/blog/my-entry.md"

content.config.ts

organizationBlog: defineCollection({
  type: 'page',
  source: {
    include: 'organization-blog/*.md',
    prefix: '/unternehmen/blog',
  },
}),

Previously, this code would have tried to build the fsPath by replacing prefix from prefixAndPath, however, prefixAndPath never actually starts with a / meaning the string replace did nothing.

This PR removes the leading / from the prefix to properly determine the fsPath.

I believe this is also tied to the use of simple include patterns, which do not leverage the double wildcard **. I created a test to validate my change. It fails prior to withoutLeadingSlash

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commit: 26885d2

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Project	Deployment	Review	Updated (UTC)
content-studio	Ready	Preview, Comment	Jan 19, 2026 1:10pm
nuxt.studio	Ready	Preview	Jan 19, 2026 1:10pm