Hey hipster! Great list, love these kinds of threads. I went through everything:

Slots link from Major Drills — Fixed! The quest was linking to a URL that doesn't exist anymore. It'll route you to the new Slots now.

Kissing Booth "Spread the Love" popup — Agreed, removed it. No more extra clicks.

Kiss notification category on legacy — Done! Kisses now show up as their own "Kissing Booth" category in your events, so they won't bury your gift notifications anymore.

Kumos notification types — Training completion notifications actually do exist on Kumos already (you should see them in the sidebar when your pet finishes). But I think what you might be missing is the legacy alerts/timer system — that countdown reminder you can set when you put a pet in training. That doesn't exist on Kumos yet. It's on my radar but not a quick add.

Shop sales history grouping — Done! If someone buys 50 candy hearts, it now shows as one line with "x50" instead of 50 separate rows. Much cleaner.

Achievements page loading — Fixed! There was a stray debug statement that was crashing the page whenever you viewed the Games category (where the new Slots achievements are). Should load normally now.

Thanks for taking the time to write these up — this is exactly the kind of feedback that helps!!!