feat(studio): add multi-column sort to evaluation sessions table [ASE-591]

[walston]

Summary

Wires the FE sort UI to the sessions endpoint added in #780.

Changes

• ****: column id → API sort field (all 1:1 for sessions)
• getSessionSortParam: converts TanStack Table sorting state to the comma-separated sort param; returns undefined when nothing is sorted so the API uses its default order
• multiSort: true on useStudioDataViewState — enables shift-click for secondary sort keys
• 7 columns enabled for sorting: test_case_id, started_at, ended_at, latency_ms, status, tokens, cost_total_usd
• input, output, and evaluator score columns remain non-sortable (out of scope per ticket)
• sort included in sessionParams when non-empty; dataViewState.sorting.state added to useMemo deps

Depends on

#780 (BE endpoint) must be merged before this branch is merged. This branch is cut from nwalston/ase-591-column-sorting — once #780 lands on main, rebase onto main before merging.

Closes ASE-591 (FE)

Summary by CodeRabbit

• New Features

  • Added multi-column sorting for evaluation session tables in preview mode.
  • Enabled sorting for test case, timing, status, token, and cost columns.

• Bug Fixes

  • Corrected latency values to display the proper formatted duration, with a fallback when unavailable.

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ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 0ec73d9 and 91f1cbd.

📒 Files selected for processing (1)

• web/packages/studio/src/components/dataViews/EvaluationSessionsDataView/index.tsx

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📝 Walkthrough

Walkthrough

Evaluation session tables now send multi-column sorting to the API, enable sorting on additional fields, and correctly render latency values.

Changes

Evaluation session sorting

Layer / File(s)	Summary
Server-side sort wiring web/packages/studio/src/components/dataViews/EvaluationSessionsDataView/index.tsx	Multi-column table sort state is mapped to API fields and included in session-list requests.
Sortable session columns web/packages/studio/src/components/dataViews/EvaluationSessionsDataView/index.tsx	Sorting is enabled for session fields, and latency cells format latency_ms values or show - when unavailable.

Sequence Diagram(s)

sequenceDiagram
  participant EvaluationSessionsTable
  participant EvaluationSessionsDataView
  participant SessionListAPI
  EvaluationSessionsTable->>EvaluationSessionsDataView: Provide multi-sort state
  EvaluationSessionsDataView->>SessionListAPI: Request sessions with sort parameter
  SessionListAPI-->>EvaluationSessionsDataView: Return sorted sessions

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Possibly related PRs

• NVIDIA-NeMo/nemo-platform#714: Adds related multi-field sort support and parsing.
• NVIDIA-NeMo/nemo-platform#780: Adds backend sort parsing and ordering for evaluation sessions.

Suggested reviewers: briannewsom

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: multi-column sorting for the evaluation sessions table.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch nwalston/ase-591-fe-sort

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[github-actions]

Suite	Lines Covered	Line Rate	Branch Rate
Unit Tests	26385/34036	77.5%	61.8%
Integration Tests	15176/32661	46.5%	18.7%