[feature request] File preview #159

When trying to work 100% from the services like claudecode or opencode, in the end I need to switch between my editor and the opencode when constructing my prompt. When mentioning files, especially on larger projects I'm not 100% sure which file to mention and need to switch back and forth between the opencode and cursor to actually see what is in the file and whether I mentioned correct path. Or whether the file should be included in the context at all.

When typing / command and mentioning a specific file, the space above the input could be used to quickly preview the content of the file so that users can easily validate they are mentioning the right thing. Especially when starting a session I have 2 lines available in the input and rest of the screen is not used. Maybe this is an issue with my workflow and does not align with the direction of the opencode. In that case, feel free to close it.