Reorganize scripts into subfolders by responsibility

Move scripts under Assets/Scripts/ into Components, GameMode, Helper,
Network, Enum, Struct and ScriptableObject folders. Pure file moves
(plus folder .meta files); no code changes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/Scripts/Helper/TypingGuard.cs

@@ -0,0 +1,41 @@
+using UnityEngine;
+using UnityEngine.EventSystems;
+using TMPro;
+
+/// <summary>
+/// True while the user is editing a focused on-screen text field (e.g. the paint HUD's
+/// "save as" name input). Global gameplay/dev hotkeys consult this so typing a name like
+/// "Checkers" doesn't also fire single-key shortcuts (C = cycle pose, K = shutdown,
+/// the mode-switch key, Ctrl+Z = undo, ...).
+/// </summary>
+public static class TypingGuard
+{
+    // Consulted several times per frame by the hotkey readers; the GetComponent lookups are cached
+    // per selected GameObject (a selection change refreshes them).
+    private static GameObject _cachedGo;
+    private static TMP_InputField _cachedTmp;
+    private static UnityEngine.UI.InputField _cachedLegacy;
+
+    /// <summary>A text input field is currently focused and capturing keystrokes.</summary>
+    public static bool IsTyping
+    {
+        get
+        {
+            var es = EventSystem.current;
+            if (!es) return false;
+
+            var go = es.currentSelectedGameObject;
+            if (!go) return false;
+
+            if (go != _cachedGo)
+            {
+                _cachedGo = go;
+                _cachedTmp = go.GetComponent<TMP_InputField>();
+                _cachedLegacy = _cachedTmp ? null : go.GetComponent<UnityEngine.UI.InputField>();
+            }
+
+            if (_cachedTmp) return _cachedTmp.isFocused;
+            return _cachedLegacy && _cachedLegacy.isFocused;
+        }
+    }
+}