* fix(inbound): preserve literal backslash-n sequences in Windows paths
The normalizeInboundTextNewlines function was converting literal backslash-n
sequences (\n) to actual newlines, corrupting Windows paths like
C:\Work\nxxx\README.md when sent through WebUI.
This fix removes the .replaceAll("\\n", "\n") operation, preserving
literal backslash-n sequences while still normalizing actual CRLF/CR to LF.
Fixes#7968
* fix(test): set RawBody to Windows path so BodyForAgent fallback chain tests correctly
* fix: tighten Windows path newline regression coverage (#11547) (thanks @mcaxtr)
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Co-authored-by: Peter Steinberger <steipete@gmail.com>
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