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Charan Rathore
46ebc6dcf7
A link annotation whose target contains non-ASCII characters (for example https://example.com/ação) was written into the PDF /URI string as raw UTF-8 bytes, but URIs in PDF are 7-bit ASCII strings (ISO 32000 §12.6.4.8). The saved file then carried an out-of-spec URI that strict readers can reject or misparse. Percent-encode every byte outside the printable ASCII range when writing the /URI entry. Bytes already inside 0x21..=0x7E pass through unchanged, so existing percent-escapes like %20 are preserved. Adds a regression test that round-trips a non-ASCII URL and an already-escaped URL through save/reload and asserts the stored URIs are pure ASCII. Signed-off-by: Charan Rathore <180254320+charan-rathore@users.noreply.github.com>