Internship seniority is clearer and more accurate

We made two seniority improvements:

1. Internship and co-op roles are classified more accurately as junior, especially when the title also contains senior-sounding words.
2. Job detail pages now show seniority as its own chip, separate from employment status chips such as Internship.

Previously, titles like Senior Marketing Intern, Product Management Intern, Member of Technical Staff Intern, or Intern - Office of the CEO could be classified as senior, staff, or C-level because those signals were checked before the internship signal. Those now correctly resolve to junior.

We also expanded matching for common internship variants such as internship, externship, co-op, co op, and titles with separators like Intern_Engineering or Co-op_Fall 2026.

Here are a few examples from the labeled set we used to validate the change:

This table refers to the seniority value shown in the new seniority chip, used by filters, exports, the API, webhooks, and the MCP server.

The classification improvement applies anywhere job seniority is used: job detail pages, Job Search, exports, the API, webhooks, and the MCP server.