Many Questions About Hyprland Ricing

Hello everyone,

I'm pretty new to Hyprland and have a great setup and customization with uwsm, but I have some questions.

1. File Manager and Image Viewer: I've tried Dolphin with Gwenview, but when I try to open images from Dolphin, it asks me to specify which program to use. I have to manually specify /usr/bin/gwenview every time, even though I checked the "remember me" option. Which configuration am I missing? What file manager and image viewer do you use, and why?
2. Window Rules: I'm having trouble with window rules. Every time I need to unlock my Bitwarden account or when it asks for a passkey, I want to set it to float using this rule: windowrulev2 = float, title:Bitwarden But it doesn’t seem to work. Any idea why?
3. Must-Have Applications: What are your must-have applications or programs for Hyprland?

Thanks in advance for your help !