Add a renderer regression test for long non-JSON tool output so the CLI's fallback rendering path is covered alongside Read and structured tool payload truncation.
Constraint: This follow-up must commit only renderer-related changes
Rejected: Touch commands crate to fix unrelated slash-command work in progress | outside the requested renderer-only scope
Confidence: high
Scope-risk: narrow
Reversibility: clean
Directive: Keep truncation guarantees covered at the renderer boundary for both structured and raw tool payloads
Tested: cargo fmt --all; cargo test -p rusty-claude-cli tool_rendering_ -- --nocapture; cargo clippy -p rusty-claude-cli --all-targets -- -D warnings
Not-tested: cargo test --workspace and cargo clippy --workspace --all-targets -- -D warnings currently fail in rust/crates/commands/src/lib.rs due pre-existing incomplete agents/skills changes outside this commit
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