Manykittens's page

The text is:

If you have available Spell Points, you can spend 1 Spell Point and Concentrate on a Spell to extend its duration by 1 round.

Does this mean that when you cast ancestral surge you can extend the duration of an active spell beyond what is written in the spell’s text by: 1. Spending one additional spell point? 2. Spending a spell point and an action? If either of these, I have follow-up questions.

…Or does it mean that you can spend a spell point to have the action used for ancestral surge count as the “Concentrate on a Spell” action for one of your already-active concentration-duration spells? (similar to the effect of effortless concentration)

…Or does the “its” refer to ancestral surge, allowing you to spend an additional action (or maybe just a spell point) to have ancestral surge end at the end of your next turn (like a concentration spell) instead of the beginning?

…Or does it mean something else that I am completely missing?

For casters who also attack using weapons some spells can cause the weapons to take a multiple attack penalty. But it is unclear what spells cause this penalty. Some spells like acid splash and harm do not have the attack trait in the bubbled key words but require you to make an attack. Others like chill touch do have this key word and also mention making an attack in the description. Further, there are spells such as electric arc that have the keyword “attack” but do not require an attack roll. “Based on the multiple attack penalty” wording on page 178 and the brief description on page 305 about what an attack is, I could see:
a) Acid splash and chill touch both being considered attacks but not electric arc
b) Chill touch and electric arc being considered attacks but not acid splash
c) All of these spells being considered attacks (and some wording changes needed in the spells and/or page 178)
d) All these and Spells like fireball which meet the spirit of what an attack is being considered an attack
Also, if things like electric arc are considered attacks, there is no attack roll for them. Would there then be a penalty if they are cast first, but no penalty if they are cast after the attack?