The default hotkey for search in Tiny Tiny RSS is / (slash) which is bound to search in the current web page text by Firefox and other sane browsers originally. The only way to change (or amend) the hotkeys Tiny Tiny RSS uses is by adding a plugin. Duh.
This plugin adds
h as a hotkey for Tiny Tiny RSS search dialog H as a hotkey for the help pop-up
This basically copies the swap jk plugin and makes it into a search (and help) dialog plugin. Trivial work.
Hosted at https://git.faster-it.com/ttrss_additional_search_hotkey
Mirrored at https://github.com/fasterit/ttrss_additional_search_hotkey
Clone this repository and copy or symlink the
additional_search_hotkey subdirectory into the
plugins.local subdirectory of your Tiny Tiny RSS installation.
Go to settings and enable the plugin and allow Tiny Tiny RSS to reload (it asks for this).
Now pressing the h key should show the search dialog and pressing H (Shift+h) the help dialog.
Commercial support for RSS / ATOM and software using these common standards is available from Faster IT GmbH.