fix(hooks): delay editMode flag setting to avoid phase error on createActor

The createActor hook was calling actor.setFlag() immediately, which triggered
updateActor -> prepareData -> prepareEmbeddedDocuments() -> applyActiveEffects().

Since the actor had already gone through data preparation during creation,
the effects had already been applied, causing the 'phase already completed' error.

Solution: Use setTimeout(..., 0) to defer the flag setting until after the
current preparation cycle is complete.

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

module/system/hooks.mjs

@@ -147,7 +147,17 @@ export const registerHooks = function () {
             }*/
         }
     });
-    Hooks.on("createActor", function (actor, options, id) {
-        actor.setFlag("world", "editMode", true)
+    Hooks.on("createActor", async function (actor, options, id) {
+        // Delay flag setting to avoid the "phase already completed" error
+        // When an actor is created, it goes through data preparation which applies effects.
+        // If we call setFlag() immediately, it triggers updateActor -> prepareData ->
+        // prepareEmbeddedDocuments() which tries to apply effects again, causing the error.
+        // By using setTimeout with 0ms, we defer the flag setting until after the current
+        // preparation cycle is complete.
+        setTimeout(() => {
+            actor.setFlag("world", "editMode", true).catch(err => {
+                console.error("Vermine2047 | Failed to set editMode flag:", err);
+            });
+        }, 0);
     })
 }