feat: add UploadZone component and database utility for file processing

src/components/admin/UploadZone.jsx

@@ -70,7 +70,7 @@ const UploadZone = ({ onUploadComplete }) => {
         <p className="font-medium text-lg">Drag files here</p>
         <p className="text-sm text-fg-muted mb-4">Supports .txt and .md (max 5MB)</p>
         <Button variant="outline" type="button" disabled={isProcessing}>
-          {isProcessing && !syncProgress ? 'AI extraction in progress...' : 'Browse files'}
+          {isProcessing ? 'AI extraction in progress...' : 'Browse files'}
         </Button>
         <input
           type="file"

src/lib/db.js

@@ -8,22 +8,26 @@ export async function getTopics() {
 
 export async function saveTopics(topics) {
   const existing = await pb.collection('topics').getFullList({ fields: 'id' });
-  await Promise.all(existing.map(r => pb.collection('topics').delete(r.id, { requestKey: null })));
-  return Promise.all(topics.map(t => pb.collection('topics').create({
+  for (const r of existing) {
+    await pb.collection('topics').delete(r.id, { requestKey: null });
+  }
+  for (const t of topics) {
+    await pb.collection('topics').create({
       id: t.id,
       label: t.label,
       type: t.type,
       description: t.description,
       learning_relevance: t.learning_relevance || 'standard',
-  }, { requestKey: null })));
+    }, { requestKey: null });
+  }
 }
 
 export async function upsertTopic(topic) {
   try {
     await pb.collection('topics').getOne(topic.id);
-    return pb.collection('topics').update(topic.id, topic);
+    return await pb.collection('topics').update(topic.id, topic);
   } catch {
-    return pb.collection('topics').create({ id: topic.id, ...topic });
+    return await pb.collection('topics').create({ id: topic.id, ...topic });
   }
 }
 
@@ -35,8 +39,12 @@ export async function getRelations() {
 
 export async function saveRelations(relations) {
   const existing = await pb.collection('relations').getFullList({ fields: 'id' });
-  await Promise.all(existing.map(r => pb.collection('relations').delete(r.id, { requestKey: null })));
-  return Promise.all(relations.map(r => pb.collection('relations').create(r, { requestKey: null })));
+  for (const r of existing) {
+    await pb.collection('relations').delete(r.id, { requestKey: null });
+  }
+  for (const r of relations) {
+    await pb.collection('relations').create(r, { requestKey: null });
+  }
 }
 
 export async function addRelation(relation) {