fix: drag flicker guard, error body parsing, wizard session restore answer

web/src/components/DocUploadZone.vue

@@ -2,7 +2,7 @@
   <div class="rounded border-2 border-dashed border-surface-border p-6 text-center"
        :class="{ 'border-accent bg-accent/5': isDragging }"
        @dragover.prevent="isDragging = true"
-       @dragleave="isDragging = false"
+       @dragleave="onDragLeave"
        @drop.prevent="onDrop">
     <p class="text-sm font-medium text-text-primary mb-1">Upload documents</p>
     <p class="text-xs text-text-dim mb-3">
@@ -56,8 +56,13 @@ async function uploadFile(file: File) {
       fileStatuses.value[idx] = { name: file.name, status: 'done' }
       emit('uploaded')
     } else {
-      const msg = await r.text()
-      fileStatuses.value[idx] = { name: file.name, status: 'error', error: msg || `Error ${r.status}` }
+      let errorMsg = `Error ${r.status}`
+      try {
+        const body = await r.text()
+        const parsed = JSON.parse(body)
+        errorMsg = parsed.detail ?? parsed.message ?? errorMsg
+      } catch { /* leave default */ }
+      fileStatuses.value[idx] = { name: file.name, status: 'error', error: errorMsg }
     }
   } catch {
     fileStatuses.value[idx] = { name: file.name, status: 'error', error: 'Upload failed' }
@@ -71,6 +76,12 @@ function onFileInput(e: Event) {
   input.value = ''
 }
 
+function onDragLeave(e: DragEvent) {
+  if (e.currentTarget instanceof Node && e.relatedTarget instanceof Node &&
+      (e.currentTarget as Node).contains(e.relatedTarget as Node)) return
+  isDragging.value = false
+}
+
 function onDrop(e: DragEvent) {
   isDragging.value = false
   if (!e.dataTransfer?.files) return

web/src/components/WizardOverlay.vue

@@ -151,6 +151,8 @@ async function loadSchema() {
   if (saved) {
     try { session.value = JSON.parse(saved) } catch {}
   }
+  // Pre-populate answer for the current step (handles sessionStorage restore)
+  answer.value = session.value.answers[currentStep.value?.id ?? ''] ?? ''
 }
 
 async function goNext(skip = false) {