stable id - fixes input for immediate mode

testing/__tests__/33_input_field_tests.lua

@@ -11,6 +11,7 @@ _G.love = loveStub
 
 -- Load FlexLove after setting up love stub
 local FlexLove = require("FlexLove")
+local StateManager = require("modules.StateManager")
 
 -- Test fixtures
 local testElement
@@ -54,6 +55,9 @@ function TestInputField:tearDown()
   love.keyboard.setDown("lgui", false)
   love.keyboard.setDown("rgui", false)
   
+  -- Clear StateManager to prevent test contamination
+  StateManager.reset()
+  
   testElement = nil
   FlexLove.Gui.topElements = {}
   FlexLove.Gui._focusedElement = nil