Needing to use the salvage abillity after a battle (where you have a salvage screen) is unintuitive.
I would suggest adding
"Salvage clouds appear after fights. Remember to use the salvage ability to gain maximum resources." or something along those lines to the tips file.
In the absence of a in game manual, the tips menu could be used as a temporary remedy to other unintuitive systems.
I would additionally recommend adding tips about new features such as major events, and actively updating as part of releases.
ie:
"Check the Major Events tab in the intel screen to see the impact of Pirates on your colonies"
