Initial Commit

Assets/Scripts/Gameplay/Bird/IBirdController.cs

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+namespace FlappyBird.Bird
+{
+    /// <summary>
+    /// Contract for the bird physics controller service.
+    /// Separates logic from the MonoBehaviour view layer.
+    /// </summary>
+    public interface IBirdController
+    {
+        /// <summary>Attaches the spawned bird view to the controller.</summary>
+        void Bind(BirdView view);
+
+        /// <summary>Initializes the bird at the given spawn position and freezes physics.</summary>
+        void Initialize();
+
+        /// <summary>Applies an upward impulse and enables physics simulation.</summary>
+        void Jump();
+
+        /// <summary>Reports a lethal collision from the view layer.</summary>
+        void HandleCollision();
+
+        /// <summary>
+        /// Enables or disables input processing.
+        /// Pass false to freeze the bird before the first tap.
+        /// </summary>
+        void SetInputEnabled(bool enabled);
+
+        /// <summary>Called every fixed-update tick to apply rotation.</summary>
+        void FixedTick();
+    }
+}