style(mcp): fix black failure in mcp_bridge.py

[kovtcharov]

Summary

python util/lint.py --black is currently failing on main because a line in mcp_bridge.py exceeds black's 88-char limit. Pure formatting fix — wraps the error dict onto multiple lines. No behaviour change.

The regression slipped in with #803 (merged a few hours ago) where the new "Invalid Request: expected JSON object" message pushed the line over.

Why merge this

A red baseline hides real new lint failures. Fixing this makes util/lint.py --black green again so the next contributor's PR doesn't inherit a pre-existing failure.

Test plan

• python util/lint.py --black passes on main after merge

[github-actions]

Summary

Tiny pure-formatting fix that wraps an over-length error dict in src/gaia/mcp/mcp_bridge.py:631-634 so python util/lint.py --black is green again on main. The long line slipped in with #803, and fixing it now prevents the next PR author from inheriting a red baseline. Verified locally with python -m black --check src/gaia/mcp/mcp_bridge.py → "1 file would be left unchanged".

Issues Found

None. Diff is +4/-1, no behaviour change, matches the formatting of the sibling error dict in the same method (mcp_bridge.py:645 is a short single-line form because it still fits under 88 chars, so no consistency concern).

Strengths

• 🟢 Scope-clean — touches only the 4 lines needed to pass black; no drive-by edits, no unrelated refactors. Exactly what a style(mcp): commit should be.
• 🟢 Clear why — PR description names the offending commit (fix(mcp): guard JSON-RPC handler against non-dict body #803) and the exact failure mode (python util/lint.py --black), which is useful context for anyone auditing the lint history.
• 🟢 Conventional-commits title — style(mcp): fix black failure in mcp_bridge.py is accurate, scoped, and under the length budget.

Verdict

Approve — ready to merge. A red lint baseline hides real regressions, so this should land quickly. After merge, consider confirming python util/lint.py --all is also clean on main in case other formatters (isort, etc.) regressed in the same window.

[kovtcharov]

Superseded — folded the same one-line black fix into #813 to unblock its CI. Will land together with that bundle.