feat: add offset pagination and X-Prev-Last-Date header to GET /sessions

Made-with: Cursor

backend/routes/sessions.js

@@ -23,6 +23,9 @@ router.get('/', (req, res) => {
   try {
     const filter = req.query.filter || 'default';
     const limitParam = req.query.limit || 'all';
+    const offsetParam = req.query.offset || '0';
+    let offset = parseInt(offsetParam, 10);
+    if (isNaN(offset) || offset < 0) offset = 0;
 
     let whereClause = '';
     if (filter === 'default') {
@@ -45,6 +48,11 @@ router.get('/', (req, res) => {
       }
     }
 
+    let offsetClause = '';
+    if (offset > 0) {
+      offsetClause = `OFFSET ${offset}`;
+    }
+
     const sessions = db.prepare(`
       SELECT 
         s.id,
@@ -60,6 +68,7 @@ router.get('/', (req, res) => {
       GROUP BY s.id
       ORDER BY s.created_at DESC
       ${limitClause}
+      ${offsetClause}
     `).all();
 
     const result = sessions.map(({ notes, ...session }) => {
@@ -69,6 +78,19 @@ router.get('/', (req, res) => {
 
     const absoluteTotal = db.prepare('SELECT COUNT(*) as total FROM sessions').get();
 
+    if (offset > 0) {
+      const prevRow = db.prepare(`
+        SELECT s.created_at
+        FROM sessions s
+        ${whereClause}
+        ORDER BY s.created_at DESC
+        LIMIT 1 OFFSET ${offset - 1}
+      `).get();
+      if (prevRow) {
+        res.set('X-Prev-Last-Date', prevRow.created_at);
+      }
+    }
+
     res.set('X-Total-Count', String(countRow.total));
     res.set('X-Absolute-Total', String(absoluteTotal.total));
     res.json(result);