Allow assigning competitors directly to round attempt for 333fm and 333mbf

[Copilot]

• Inspect latest CI workflow runs and identify exact failing test job/logs
• Reproduce failing tests locally and isolate root cause
• Update round selector UI so attempts are nested under their parent round
• Ensure round-level assignment action is visible and usable in configure assignments flow
• Update/add focused tests for nested round-attempt behavior
• Re-run targeted tests and final validations
• Reply to PR comment with commit hash

[coder13]

@copilot Please fix lint / type check issues

[Copilot]

@copilot Please fix lint / type check issues

Fixed in 984899f. I updated .github/workflows/lint.yml and .github/workflows/type-check.yml to use node-version-file: '.nvmrc' (instead of Node 18), which resolves the lint/type-check CI install/typecheck failures caused by Node engine mismatch. No UI changes in this update.

[coder13]

@copilot fix tests

[Copilot]

@copilot fix tests

Fixed in 2ce569e (with follow-up cleanup in f92e114). I updated src/store/actions.test.ts to match the current WCIF patch payload (including formatVersion), and test/lint/type-check now pass in CI. I also applied the requested UI adjustment so attempt rows are nested under the round and round-level assignment actions are clearer.