chore: fix clippy warnings

src/systems/movement.rs

@@ -20,7 +20,7 @@ pub struct EdgeProgress {
 }
 
 /// Pure spatial position component - works for both static and dynamic entities.
-#[derive(Component, Debug, Copy, Clone, PartialEq)]
+#[derive(Component, Debug, Copy, Clone, PartialEq, Default)]
 pub struct Position {
     /// The current/primary node this entity is at or traveling from
     pub node: NodeId,
@@ -29,10 +29,13 @@ pub struct Position {
 }
 
 /// Explicit movement state - only for entities that can move.
-#[derive(Component, Debug, Clone, Copy, PartialEq)]
+#[derive(Component, Debug, Clone, Copy, PartialEq, Default)]
 pub enum MovementState {
+    #[default]
     Stopped,
-    Moving { direction: Direction },
+    Moving {
+        direction: Direction,
+    },
 }
 
 /// Movement capability and parameters - only for entities that can move.
@@ -83,15 +86,6 @@ impl Position {
     }
 }
 
-impl Default for Position {
-    fn default() -> Self {
-        Position {
-            node: 0,
-            edge_progress: None,
-        }
-    }
-}
-
 #[allow(dead_code)]
 impl Position {
     /// Returns `true` if the position is exactly at a node (not traveling).