Fixed first two steps

.github/copilot-instructions.md

@@ -3,8 +3,10 @@
 - This code is written in Svelte 5
 - It's important to only use modern Svelte 5 syntax, runes, and features.
     - Do not use $:, do not use eventDispatching as they are both deprecated
-    - User $effect, $state, $derived
+    - Use $effect, $state, $derived, eg. let { value } = $state(initialValue);
     - Pass fucntions as props instead od dispatching events
+    - Mixing old (on:click) and new syntaxes for event handling is not allowed. Use only the onclick syntax
+    - when setting state entity, simply od variable = newValue, do not use setState or similar methods like $state.
 - Use styling from ".github/styling.md" for any UI components.
 - Refer to the ".github/core-instructions.md" for the overall structure of the application.
 - Generate ".github/done.md" file to see what is done and what is not. Check it when you start and finish a task.