Rework input buffer to match HDR closer (#79)

## Summary

- Preserve distinct same-action bindings in rollback input frames.
- Add independent command lifetimes with tap and state-scoped hold buffering.
- Detect second shield bindings and consume shield commands for air dodge.
- Fix duplicate keyboard mappings being overwritten.

Reviewed-on: #79
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

src/fighter/state/jump.rs

@@ -11,7 +11,7 @@ use crate::{
             ground,
         },
     },
-    input::FighterCommands,
+    input::{DigitalAction, FighterCommands},
     math::{int::FGi32, vec::FGVec2},
 };
 #[derive(Debug, Hash, Clone, Copy)]
@@ -68,8 +68,18 @@ impl FighterStateImpl for JumpSquatState {
                 direction: wavedash_dir.normalize_or_zero(),
             }))
         } else if self.duration_counter >= state_context.fighter_attributes.jumpsquat_duration {
-            info!("Jump {}", state_context.input.get_last_frame().jump);
-            let jump_type = if state_context.input.get_last_frame().jump {
+            info!(
+                "Jump {}",
+                state_context
+                    .input
+                    .get_last_frame()
+                    .is_held(DigitalAction::Jump)
+            );
+            let jump_type = if state_context
+                .input
+                .get_last_frame()
+                .is_held(DigitalAction::Jump)
+            {
                 JumpType::LongJump
             } else {
                 JumpType::ShortHop
@@ -97,9 +107,14 @@ impl FighterStateImpl for JumpSquatState {
 
     fn on_enter(&mut self, state_context: &mut EnterContext) {
         state_context.play_animation(AnimKind::JumpSquat, false);
+        state_context.input.enable_hold_all(10);
         state_context.input.clear_command(FighterCommands::Jump);
     }
 
+    fn on_exit(&mut self, state_context: &mut crate::fighter::state::ExitContext) {
+        state_context.input.disable_hold_all();
+    }
+
     fn is_visually_grounded<'a>(&'a self) -> bool {
         true
     }