Fix various minor issues

src/input/buffer.rs

@@ -25,7 +25,7 @@ pub enum FighterCommands {
 
 /// Frames of life remaining for each buffered command. Indexed by
 /// [`FighterCommands`] so adding a command is a two-line change here.
-#[derive(Default, Clone, Copy)]
+#[derive(Default, Clone, Copy, Hash)]
 pub struct FighterCommandLifetimes {
     smash_move_left: u8,
     smash_move_right: u8,
@@ -60,7 +60,7 @@ impl IndexMut<FighterCommands> for FighterCommandLifetimes {
     }
 }
 
-#[derive(Component, Default, Clone, Copy)]
+#[derive(Component, Default, Clone, Copy, Hash)]
 #[require(Rollback)]
 pub struct FighterInput {
     command_lifetimes: FighterCommandLifetimes,

src/input/frame.rs

@@ -4,7 +4,7 @@ use crate::math::vec::FGVec2;
 
 /// One frame of a player's raw input. This is the type GGRS serializes and
 /// sends over the wire, so keep it small and keep it `PartialEq`.
-#[derive(Copy, Clone, Debug, PartialEq, Default, Serialize, Deserialize)]
+#[derive(Copy, Clone, Debug, PartialEq, Default, Serialize, Deserialize, Hash)]
 pub struct FighterInputFrame {
     pub movement: FGVec2,
     pub directional_attack: FGVec2,

src/input/mod.rs

@@ -108,7 +108,8 @@ impl Plugin for FighterInputPlugin {
             GgrsSchedule,
             buffer::postprocess_input.in_set(GameplaySet::Input),
         )
-        .rollback_component_with_clone::<FighterInput>();
+        .rollback_component_with_clone::<FighterInput>()
+        .checksum_component_with_hash::<FighterInput>();
     }
 }