admin.js, gallery.js and metadata.html each carried a copy of the PNG chunk
walker that reads ComfyUI's tEXt/iTXt entries (admin.js had two until the
shadowed one was removed). web/js/png-metadata.js is now the only parser:
it checks the signature, bounds-checks every chunk so a truncated file or a
bogus length cannot throw, decodes tEXt as Latin-1 and iTXt as UTF-8, skips
compressed zTXt/iTXt payloads instead of decoding them as garbage, and stops
at IEND. The three page-level parsePNGMetadata functions delegate to it.
Vito Sansevero
de194af8bc