feat(eval): read-only batch-evaluation TUI (list + get)

[jariy17]

What

Adds the read-only TUI for agentcore eval batch-evaluation, wiring it into the eval TUI alongside evaluator and online-eval:

• list — a paginated, searchable table of batch evaluations (BatchEvaluationPicker over PaginatedTablePicker). Enter on a row opens that job.
• get — a raw-JSON detail screen (JsonDetail). No metadata hub: the value is the full response (job metadata + per-session results), which the JSON shows cleanly. Unwraps getBatchEvaluation's { detail } (metadata + merged CloudWatch results).
• menu — BatchEvaluationScreen (RouterScreen). This route is mandatory: the eval menu already lists batch-evaluation, and without a route the entry falls through to the HelpScreen catch-all and exits the app.

A bare agentcore eval batch-evaluation now opens the TUI (renderTui + withTuiOnEmptyFlagsAndArgs) instead of printing help.

Demo

Files

• src/components/BatchEvaluationPicker.tsx — list body (columns/toRow/loadPage), mirrors OnlineEvalPicker.
• src/handlers/eval/batch-evaluation/list/screen.tsx — BatchEvaluationListScreen; enter → get.
• src/handlers/eval/batch-evaluation/get/screen.tsx — BatchEvaluationGetJsonScreen + useBatchEvaluationDetail.
• src/handlers/eval/batch-evaluation/screen.tsx — BatchEvaluationScreen menu.
• index.tsx re-wired to renderTui; Root.tsx gets the menu + list + bare-get-redirect + get/:id routes.

Testing

• batch-evaluation.screen.test.tsx — menu (get/list), picker (rows, Core-options, bare-get redirect, selection → JSON, empty), detail (full JSON incl. merged results, CloudWatch-failure-degrades, retry).
• Full suite: 752 pass, typecheck + lint clean.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.74%. Comparing base (8cfce32) to head (6958442).
⚠️ Report is 2 commits behind head on refactor.

Additional details and impacted files

@@             Coverage Diff              @@
##           refactor    #1938      +/-   ##
============================================
+ Coverage     96.71%   96.74%   +0.02%     
============================================
  Files           296      300       +4     
  Lines         16209    16331     +122     
============================================
+ Hits          15677    15799     +122     
  Misses          532      532              

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[aidandaly24]

One comment though it can be a follow up

[aidandaly24]

I may be missing an intended TUI-specific behavior, but should we preserve resultsError here instead of dropping it? A CloudWatch access or read failure currently renders normal job JSON without results, so the user cannot distinguish incomplete data from a job that simply has no results yet. The headless command warns for this reason. Would it make sense to return both values from the query and show a persistent warning above the JSON while still preserving the metadata?

[jariy17]

I'll update now to fix it.