refactor: simplify AI panel workflow - direct file modification and reload from disk

editor/stores/editorStore.ts

@@ -10,7 +10,6 @@ export const useEditorStore = defineStore('editor', () => {
   const sourcePath = ref('/scenes/demo.json')
   const deepseekKey = ref(localStorage.getItem('deepseek_key') || '')
   const showAIPanel = ref(false)
-  const aiResult = ref('')
   const aiSessionId = ref('')
 
   const selectedScene = computed(() => {
@@ -142,8 +141,6 @@ export const useEditorStore = defineStore('editor', () => {
 
   function clearAISession() { aiSessionId.value = ''; localStorage.removeItem('editor_ai_session') }
 
-  function setAIResult(r: string) { aiResult.value = r }
-
   async function autoSave() {
     try {
       await fetch('/api/save', {
@@ -154,11 +151,21 @@ export const useEditorStore = defineStore('editor', () => {
     } catch { /* dev server not running */ }
   }
 
+  async function reloadFromDisk() {
+    try {
+      const resp = await fetch(sourcePath.value)
+      const data = await resp.json()
+      gameData.value = data
+      selectedNodeId.value = null
+      clearAISession()
+    } catch { /* failed to reload */ }
+  }
+
   return {
     gameData, selectedNodeId, selectedScene, startSceneId, dirty, sourcePath,
-    deepseekKey, showAIPanel, aiResult, aiSessionId,
+    deepseekKey, showAIPanel, aiSessionId,
     markDirty, loadJSON, exportJSON, addScene, deleteScene,
     updateScene, addChoice, updateChoice, deleteChoice, generateId,
-    setSourcePath, setDeepseekKey, setAISessionId, clearAISession, setAIResult, autoSave,
+    setSourcePath, setDeepseekKey, setAISessionId, clearAISession, autoSave, reloadFromDisk,
   }
 })