Highlight Character on Single Key Press
When searching for the term “abc”, the system correctly interprets each letter as a character. However, when searching for “a”, it is treated as a complete word rather than a single character. This discrepancy results in highlighting the entire word instead of the individual character, preventing precise character-level highlighting.
Because PDF files sometimes do not have character-level coordinates (or sometimes could not calculate them), it results in such behavior.
On the other hand, #235 is a little different issue. For Flutter Web, pdfrx internally uses pdf.js and I still have a task to do.
Recent versions uses PDFium internally and does not have the issue any longer.