This are just some comfort tweaks, i made a mock up screenshot for your convenience.
1. The personnel marker has a middle value that shows the additionally required minimal flight crew to operate all ships. Right now I always have to buy my crew in estimated chunks.
2. There are buttons for ship/fleet repair in the fleet tab of a allied/neutral station. If you click "Repair Ship" you can hover over a ship to see the required supplies to repair it (as shown) and then click to reapir. If you hover over "Repair All Ships" it will show you the total supplies costs.
For added comfort a auto buy function could be integrated to buy supplies if the fleets are not sufficient.
3. (Not shown) A "Fill Ranks" button, that lets you hover over a ship to see how much pesonell is required and then click to fill it with the cheapest available crew.
e/ fixed required crew display