fix: hide Python activity bar icon in non-Python workspaces - #1663

PR classified as community.

⚠️ Head commit is NOT signed by a trusted team member, so the full 3-approval requirement applies. (GitHub-signed merge df4e496 contains content beyond a clean 3-way merge of its parents — not eligible for the Update-branch credit.)

Tip: to earn the credit (−1 approval), the head commit must be signed by you with one of your own keys listed in security/trusted-signing-keys.csv. A "Verified" badge that GitHub adds to commits it creates on your behalf — web-editor edits, applied suggestions, Codespaces, API commits — does not count.

⚠️ Collaborator approvals: 1/3 (heejaechang).

Needs 2 more collaborator approvals to merge.

✅ No newly added runnable binary files.

✅ No protected engineering system files changed.