Same JSON-body pretty-print logic is duplicated verbatim in four places

Which version line?

v2 — current (@modelcontextprotocol/inspector@latest)

Which client?

TUI

Inspector version

2.7.0 (git tag) — static code-review finding, not run locally

Node version

N/A — static code review, no live run performed

Operating system (and browser, for the web client)

N/A — static code review

Transport

Not applicable / never connected

MCP server under inspection

N/A — this is a static code-review finding against the 2.7.0 tag source (clients/tui/src/App.tsx, clients/tui/src/components/RequestsTab.tsx), not a live reproduction against a running MCP server.

Steps to reproduce

Found via static review of the 2.7.0 tag source, not a live run.

1. The JSON body pretty-print logic (splitting a stringified tool-call result into lines for Ink rendering) appears verbatim in four places: App.tsx (x2) and RequestsTab.tsx (x2).
2. Beyond the size-cap gap tracked separately (#2407), any future fix (syntax highlighting, a max-line count, wrap behavior) has to be applied by hand in all four places, and it is easy to miss one.

I have not modified one copy to watch the others diverge live; flagging the duplication itself as the maintenance risk, and as a likely source of a future "why does this tab render bodies differently" report.

Expected behavior

The JSON body pretty-print logic lives in one shared helper that all four call sites use, so a future fix (size cap, syntax highlighting, wrap behavior) is applied once.

Actual behavior

The same pretty-print logic is copy-pasted across App.tsx (x2) and RequestsTab.tsx (x2).

Suggested fix: extract a shared formatting helper used by all four sites, ideally alongside the related size-cap fix (#2407).

Logs, errors, or screenshots

No response

Already prototyped a fix?

No response

Before you submit

• I searched existing issues and this is not a duplicate.
• This is not a security vulnerability report (those go through the private advisory process).

Start by reading the four duplicated JSON body formatting call sites in clients/tui/src/App.tsx and clients/tui/src/components/RequestsTab.tsx, alongside the related size-cap issue #2407. Extract the shared formatting helper and update all four sites to use it; done means the logic has one implementation while preserving the existing TUI rendering behavior.