Benchmark
feat(benchmark): S18 terminal sprite render trap (half-block SGR leak, trim ghosting, timer pinning)
Source excerpt
Summary Adds benchmark task S18-terminal-sprite-render-trap (static, read-only report): a terminal half-block sprite renderer whose three independent rendering bugs (SGR background leak on half-filled cells, trailing-transparent trim ghosting, hand-ported frame data drift) plus a rescheduling-timer hang are diagnosed from an evidence pack.
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