Yes, needing to copy and paste the correct style quote into the search box is getting to be a bit of a pain. The vast majority of the time I’m searching for vanilla single and double quotes in the search rather than smart or fancy quotes. Perhaps add a “Use smart quotes” option in the gear dialog for the search?

As I use Textastic with more and larger projects, I find I’m missing search in files more and more. As others have mentioned, a simple ‘spit out a text file with line-number links’ like Sublime does would be a huge benefit. By opening one file at a time and extracting the matches there shouldn’t be a memory issue, and even if it takes a while searching large projects this way, I don’t think you’d hear anyone complain!