Add frame tick system for continuous animation

- Added INPUT_FRAME_TICK event type to input_event.h
- Added wants_frame_updates() virtual method to Game base class
- Implemented frame tick logic in main loop (basic1.cpp and emulator/main.cpp)
- Added Lua bindings: game.set_frame_updates(bool) and INPUT.FRAME_TICK
- Updated LuaGame to support frame updates via registry flag
- Updated ball.lua to use continuous frame updates for smooth animation
- Both hardware and emulator now support continuous animation for physics/games

games/lua_bindings.cpp

@@ -186,6 +186,21 @@ static int lua_game_exit(lua_State* L) {
     return 0;
 }
 
+// game.set_frame_updates(enabled) - enable/disable continuous frame tick events
+static int lua_game_set_frame_updates(lua_State* L) {
+    LuaGame* game = get_game(L);
+    if (!game) return 0;
+    
+    bool enabled = lua_toboolean(L, 1);
+    
+    // Set frame updates flag (will be checked in wants_frame_updates())
+    lua_pushstring(L, "__wants_frame_updates");
+    lua_pushboolean(L, enabled);
+    lua_settable(L, LUA_REGISTRYINDEX);
+    
+    return 0;
+}
+
 // ============================================================================
 // INPUT TYPE CONSTANTS
 // ============================================================================
@@ -283,6 +298,10 @@ void lua_bindings_register(lua_State* L, LuaGame* game) {
     lua_pushcfunction(L, lua_game_exit);
     lua_settable(L, -3);
     
+    lua_pushstring(L, "set_frame_updates");
+    lua_pushcfunction(L, lua_game_set_frame_updates);
+    lua_settable(L, -3);
+    
     // Create empty vars table for persistent state
     lua_pushstring(L, "vars");
     lua_newtable(L);

games/lua_examples/ball.lua

@@ -14,6 +14,9 @@ function init()
     game.vars.radius = 10
     game.vars.frame_count = 0
     
+    -- Enable continuous frame updates for smooth animation
+    game.set_frame_updates(true)
+    
     print("Bouncing Ball initialized")
 end
 
@@ -28,8 +31,8 @@ function update(event)
         return true
     end
     
-    -- Update physics if running
-    if game.vars.state == STATE_RUNNING then
+    -- Update physics if running (on any frame tick)
+    if event.type == INPUT.FRAME_TICK and game.vars.state == STATE_RUNNING then
         -- Move ball
         game.vars.ball_x = game.vars.ball_x + game.vars.vel_x
         game.vars.ball_y = game.vars.ball_y + game.vars.vel_y

games/lua_game.cpp

@@ -193,6 +193,18 @@ bool LuaGame::wants_to_exit() const {
     return exit;
 }
 
+bool LuaGame::wants_frame_updates() const {
+    if (!L) return false;
+    
+    // Check if Lua script wants continuous frame updates
+    lua_pushstring(L, "__wants_frame_updates");
+    lua_gettable(L, LUA_REGISTRYINDEX);
+    bool wants_updates = lua_toboolean(L, -1);
+    lua_pop(L, 1);
+    
+    return wants_updates;
+}
+
 bool LuaGame::call_lua_function(const char* func_name, int nargs, int nresults) {
     int result = lua_pcall(L, nargs, nresults, 0);
     if (result != LUA_OK) {

games/lua_game.h

@@ -64,6 +64,12 @@ public:
      */
     bool wants_to_exit() const override;
     
+    /**
+     * @brief Check if game wants continuous frame updates
+     * @return true if Lua script set __wants_frame_updates flag
+     */
+    bool wants_frame_updates() const override;
+    
     /**
      * @brief Get Lua state for bindings access
      */