fix(tui): wrap long JSON values in detail views

[notgitika]

Wrap long JSON values in TUI detail views instead of truncating them.
Adds regression coverage for long harness prompts.

before:

after:

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[agentcore-devx-automation]

AgentCore Harness Review

Verdict: Looks good

Small, well-scoped fix. CodeBlock already accepted a wrap prop; JsonDetail just wasn't passing it, so long JSON values (like a multi-sentence systemPrompt) were being truncated with …. Toggling wrap on skips the truncation branch in CodeBlock.renderLine and lets Ink's <Text> wrap naturally within the ScrollView.

The test is a genuine behavior check, not a snapshot: it builds a ~245‑char prompt with a WRAP_SENTINEL at the end, renders at the default 100-column test width, and asserts the sentinel appears in the frame. Without wrap, the sentinel would be sliced off by the truncation in CodeBlock.renderLine, so it correctly guards against regression. Mocking is limited to TestCoreClient at the SDK boundary — appropriate. No telemetry needed for a rendering fix.

Nothing blocking — good to merge.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.08%. Comparing base (4d806e8) to head (e695fee).
⚠️ Report is 2 commits behind head on refactor.

Additional details and impacted files

@@            Coverage Diff            @@
##           refactor    #2212   +/-   ##
=========================================
  Coverage     97.08%   97.08%           
=========================================
  Files           544      544           
  Lines         37869    37870    +1     
=========================================
+ Hits          36765    36766    +1     
  Misses         1104     1104           

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