added: grade, subject and chapter in new chat, fixed that shitty card bug

backend/src/routes/sessions.js

@@ -0,0 +1,58 @@
+import express from "express";
+import { listSessions, getSession, deleteSession, clearMessages, createSession } from "../stores/sessionStore.js";
+
+const router = express.Router();
+
+/**
+ * GET /api/sessions — List all sessions
+ */
+router.get("/", (_req, res) => {
+  const sessions = listSessions();
+  res.json(sessions);
+});
+
+/**
+ * POST /api/sessions — Create a new session
+ */
+router.post("/", (req, res) => {
+  const { grade, subject, chapter } = req.body;
+  const session = createSession(grade, subject, chapter);
+  res.status(201).json(session);
+});
+
+/**
+ * GET /api/sessions/:id — Get a single session
+ */
+router.get("/:id", (req, res) => {
+  const session = getSession(req.params.id);
+  if (!session) {
+    return res.status(404).json({ error: "Session not found" });
+  }
+  res.json(session);
+});
+
+/**
+ * DELETE /api/sessions/:id — Delete a session
+ */
+router.delete("/:id", (req, res) => {
+  const deleted = deleteSession(req.params.id);
+  if (!deleted) {
+    return res.status(404).json({ error: "Session not found" });
+  }
+  res.json({ message: "Session deleted", id: req.params.id });
+});
+
+/**
+ * PATCH /api/sessions/:id/clear — Clear messages but keep session
+ */
+router.patch("/:id/clear", (req, res) => {
+  const { id } = req.params;
+  const session = getSession(id);
+  if (!session) {
+    return res.status(404).json({ error: "Session not found" });
+  }
+  clearMessages(id);
+  res.json({ message: "Messages cleared", id });
+});
+
+export default router;