🔧 Fix SQL Structure Issues Across All Collection APIs

🐛 Multiple API Fixes:
- Fixed SQL DISTINCT/ORDER BY conflict in thumbnails API
- Fixed SQL result structure (.rows) in cards API
- Fixed SQL result structure (.rows) in permissions API
- Restored accidentally removed code in cards API

✅ Technical Corrections:
- Removed DISTINCT from thumbnails query to fix ORDER BY conflict
- Updated all APIs to use collectionResult.rows instead of direct access
- Updated all result mappings to use .rows property
- Fixed validation checks to use .rows.length

🎯 Expected Results:
- Thumbnails API should now work without SQL errors
- Cards API should load collection cards properly
- Permissions API should work for collection management
- New card layout thumbnails should display correctly

All collection APIs should now work properly! 🚀

pages/api/collections/[identifier]/cards.js

@@ -59,11 +59,11 @@ export default async function handler(req, res) {
       `;
     }
 
-    if (collectionResult.length === 0) {
+    if (collectionResult.rows.length === 0) {
       return res.status(404).json({ error: 'Collection not found or access denied' });
     }
 
-    const collection = collectionResult[0];
+    const collection = collectionResult.rows[0];
 
     if (req.method === 'GET') {
       // Get all cards in the collection
@@ -78,7 +78,7 @@ export default async function handler(req, res) {
         ORDER BY cc.created_at DESC
       `;
 
-      const cards = cardsResult.map(card => ({
+      const cards = cardsResult.rows.map(card => ({
         id: card.id,
         name: card.name,
         set_name: card.set_name,
@@ -196,13 +196,13 @@ export default async function handler(req, res) {
           RETURNING *
         `;
 
-        if (result.length === 0) {
+        if (result.rows.length === 0) {
           return res.status(404).json({ error: 'Card not found in collection' });
         }
 
         res.status(200).json({ 
           message: 'Card quantity updated',
-          card: result[0]
+          card: result.rows[0]
         });
       }
 
@@ -234,7 +234,7 @@ export default async function handler(req, res) {
         RETURNING *
       `;
 
-      if (result.length === 0) {
+      if (result.rows.length === 0) {
         return res.status(404).json({ error: 'Card not found in collection' });
       }
 

pages/api/collections/[identifier]/permissions.js

@@ -45,11 +45,11 @@ export default async function handler(req, res) {
       `;
     }
 
-    if (collectionResult.length === 0) {
+    if (collectionResult.rows.length === 0) {
       return res.status(404).json({ error: 'Collection not found or you do not have permission to manage permissions' });
     }
 
-    const collection = collectionResult[0];
+    const collection = collectionResult.rows[0];
 
     if (req.method === 'GET') {
       // Get all permissions for this collection
@@ -65,7 +65,7 @@ export default async function handler(req, res) {
         ORDER BY cp.created_at DESC
       `;
 
-      const permissions = permissionsResult.map(perm => ({
+      const permissions = permissionsResult.rows.map(perm => ({
         id: perm.id,
         userId: perm.user_id,
         email: perm.email,

pages/api/collections/[identifier]/thumbnails.js

@@ -83,7 +83,7 @@ export default async function handler(req, res) {
 
     // Get the top 5 rarest cards from the collection
     const thumbnailsResult = await sql`
-      SELECT DISTINCT
+      SELECT 
         cards.id,
         cards.name,
         cards.rarity,