reduce amount of magic values, goal is to have specific states -> e.g. cancelled

src/model/mod.rs

@@ -6,7 +6,7 @@ use waterlevel::WaterlevelDay;
 use crate::AMOUNT_DAYS_TO_SHOW_TRIPS_AHEAD;
 
 use self::{
-    event::{Event, EventWithUserAndTriptype},
+    event::{Event, EventWithDetails},
     trip::{Trip, TripWithUserAndType},
     waterlevel::Waterlevel,
     weather::Weather,
@@ -44,7 +44,7 @@ pub mod weather;
 #[derive(Serialize, Debug)]
 pub struct Day {
     day: NaiveDate,
-    events: Vec<EventWithUserAndTriptype>,
+    events: Vec<EventWithDetails>,
     trips: Vec<TripWithUserAndType>,
     is_pinned: bool,
     regular_sees_this_day: bool,