Fix: Show only incomplete todos due today or later (exclude overdue items)

backend/routes/todos.js

@@ -37,17 +37,16 @@ router.get("/", async (req, res) => {
 
 router.get("/today", async (req, res) => {
   try {
-    const { start, end } = getDayRange();
-    // Include:
-    // 1. Tasks due today
-    // 2. Overdue tasks (due before today) that are not completed
-    // 3. Tasks with no due date that are not completed
+    const { start } = getDayRange();
+    // Show incomplete todos that are:
+    // 1. Due today or later (not overdue)
+    // 2. Have no due date set
     const todos = await Todo.find({
+      completed: false,
       $or: [
-        { dueDate: { $gte: start, $lte: end } },
-        { dueDate: { $lt: start }, completed: false },
-        { dueDate: { $exists: false }, completed: false },
-        { dueDate: null, completed: false }
+        { dueDate: { $gte: start } },
+        { dueDate: { $exists: false } },
+        { dueDate: null }
       ]
     }).sort({
       dueDate: 1,