feat: add GET /api/projects using NextAuth + Postgres

app/api/projects/route.ts

@@ -0,0 +1,58 @@
+import { NextResponse } from 'next/server';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/lib/auth/authOptions';
+import { query } from '@/lib/db-postgres';
+
+export async function GET() {
+  try {
+    const session = await getServerSession(authOptions);
+    if (!session?.user?.email) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const email = session.user.email;
+
+    // Fetch projects joined on user email
+    const projects = await query<any>(`
+      SELECT p.id, p.data, p.workspace, p.slug
+      FROM fs_projects p
+      JOIN fs_users u ON u.id = p.user_id
+      WHERE u.data->>'email' = $1
+      ORDER BY (p.data->>'updatedAt') DESC NULLS LAST
+    `, [email]);
+
+    // Fetch session stats per project
+    const sessionStats = await query<any>(`
+      SELECT
+        s.data->>'projectId' AS project_id,
+        COUNT(*)::int AS session_count,
+        COALESCE(SUM((s.data->>'cost')::float), 0) AS total_cost
+      FROM fs_sessions s
+      JOIN fs_users u ON u.id = s.user_id
+      WHERE u.data->>'email' = $1
+      GROUP BY s.data->>'projectId'
+    `, [email]);
+
+    const statsByProject = new Map(sessionStats.map((s: any) => [s.project_id, s]));
+
+    const result = projects.map((p: any) => {
+      const stats = statsByProject.get(p.id) || { session_count: 0, total_cost: 0 };
+      return {
+        id: p.id,
+        ...p.data,
+        stats: {
+          sessions: stats.session_count || 0,
+          costs: parseFloat(stats.total_cost) || 0,
+        },
+      };
+    });
+
+    return NextResponse.json({ projects: result });
+  } catch (error) {
+    console.error('[GET /api/projects] Error:', error);
+    return NextResponse.json(
+      { error: 'Failed to fetch projects', details: error instanceof Error ? error.message : String(error) },
+      { status: 500 }
+    );
+  }
+}