fix(loops): group loops by visibility

[benben]

Summary

• group personal and team loops by their visibility instead of creator ownership
• move team-visible loops created by the current user into Team loops
• remove the current-user request that was only needed for ownership grouping
• add regression coverage for team loops created by the signed-in user

Testing

• pnpm exec vitest run src/features/loops/components/LoopsListView.test.tsx (4 passed)
• pnpm exec biome check src/features/loops/components/LoopsListView.tsx src/features/loops/components/LoopsListView.test.tsx
• full typecheck/pre-commit hook is currently blocked by the unrelated missing typebox dependency in @posthog/harness

[trunk-io]

✨ Submitted to Merge by @benben. It will be added to the merge queue once all branch protection rules pass and there are no merge conflicts with the target branch. See more details here.

[github-actions]

React Doctor found no issues in the changed files. 🎉

_{Reviewed by React Doctor for commit f24d3cf.}

[greptile-apps]

_{Reviews (1): Last reviewed commit: "fix(loops): group loops by visibility" | Re-trigger Greptile}