bug fixing

Removed a dash from the sentence for clarity.

README.md

@@ -19,6 +19,7 @@ A modern, grid-based habit tracker app inspired by GitHub contribution graphs. T
 - [Self-hosted Mirror (Gitea)](https://git.mihajlociric.com/count0/HabitGrid)
 
 
+
 ## Features
 - GitHub-style habit grid (calendar view)
 - Streak tracking and personal bests
@@ -26,10 +27,19 @@ A modern, grid-based habit tracker app inspired by GitHub contribution graphs. T
 - Dark mode and light mode
 - Data export/import (JSON backup)
 - Responsive design (desktop & mobile)
+- **Cross-device sync with Supabase (cloud save)**
+- **Offline-first:** works fully without login, syncs local habits to cloud on login
 - Built with React, Vite, Tailwind CSS, Radix UI, and Framer Motion
 
 ---
 
+
+## How Sync Works
+
+- By default, all habits are stored locally and work offline.
+- When you log in (via the call to action button), your local habits are synced to Supabase and available on all devices.
+- Any changes (including categories, order, completions) are automatically pushed to the cloud when logged in.
+
 ## Getting Started
 
 ### Prerequisites
@@ -69,7 +79,29 @@ src/
   pages/
 ```
 
-## Deployment Tip
+
+## Cloud Sync Setup
+
+To enable cross-device sync, you need a free [Supabase](https://supabase.com/) account:
+
+1. Create a Supabase project and set up a `habits` table with the following schema:
+   ```sql
+   create table habits (
+     id uuid primary key default gen_random_uuid(),
+     user_id uuid not null,
+     name text not null,
+     color text,
+     category text,
+     completions jsonb default '[]'::jsonb,
+     current_streak int default 0,
+     longest_streak int default 0,
+     sort_order int default 0,
+     created_at timestamptz default now(),
+     updated_at timestamptz default now()
+   );
+   ```
+2. Add your Supabase project URL and anon key to the app's environment/config.
+3. Deploy as usual (see below).
 
 You can easily deploy your own instance of HabitGrid using [Cloudflare Pages](https://pages.cloudflare.com/):
 
@@ -86,9 +118,11 @@ You can easily deploy your own instance of HabitGrid using [Cloudflare Pages](ht
    ```
 5. Deploy and enjoy your own habit tracker online!
 
-## License
 
-MIT
+## Offline-First Guarantee
+
+- You can use HabitGrid without ever logging in everything works locally.
+- If you decide to log in later, all your local habits (including categories and order) will be synced to the cloud and available on all devices.
 
 ---
 
@@ -100,6 +134,4 @@ MIT
 
 ---
 
----
-
 *Built with ❤️ by [Mihajlo Ciric](https://mihajlociric.com/)*

src/components/HabitGrid.jsx

@@ -40,9 +40,9 @@ const HabitGrid = ({ habit, onUpdate, fullView = false }) => {
 
   const handleCellClick = async (date) => {
     const dateStr = formatDate(date);
-    // Only do optimistic localStorage write if logged in (remote-first). In local-only mode, let datastore handle it to avoid double-toggle.
     const user = await getAuthUser();
     if (user) {
+      // Optimistically update completions for instant UI
       const habits = JSON.parse(localStorage.getItem('habitgrid_data') || '[]');
       const idx = habits.findIndex(h => h.id === habit.id);
       if (idx !== -1) {
@@ -52,9 +52,14 @@ const HabitGrid = ({ habit, onUpdate, fullView = false }) => {
         habits[idx].completions = completions;
         localStorage.setItem('habitgrid_data', JSON.stringify(habits));
       }
-    }
+      onUpdate();
+      // Sync in background
+      toggleCompletion(habit.id, dateStr);
+    } else {
+      // Local-only: just call toggleCompletion, then update UI
       await toggleCompletion(habit.id, dateStr);
       onUpdate();
+    }
   };
 
   return (

src/components/MiniGrid.jsx

@@ -69,9 +69,9 @@ const MiniGrid = ({ habit, onUpdate }) => {
     const dateStr = formatDate(date);
     const isTodayCell = isToday(date);
     const wasCompleted = habit.completions.includes(dateStr);
-    // Only optimistic write if logged in; in local-only mode, datastore handles it to avoid double-toggle
     const user = await getAuthUser();
     if (user) {
+      // Optimistically update completions for instant UI
       const habits = JSON.parse(localStorage.getItem('habitgrid_data') || '[]');
       const idx = habits.findIndex(h => h.id === habit.id);
       if (idx !== -1) {
@@ -81,9 +81,14 @@ const MiniGrid = ({ habit, onUpdate }) => {
         habits[idx].completions = completions;
         localStorage.setItem('habitgrid_data', JSON.stringify(habits));
       }
-    }
+      onUpdate();
+      // Sync in background
+      toggleCompletion(habit.id, dateStr);
+    } else {
+      // Local-only: just call toggleCompletion, then update UI
       await toggleCompletion(habit.id, dateStr);
       onUpdate();
+    }
     // Only show encouragement toast if validating (adding) today's dot
     if (isTodayCell && !wasCompleted) {
       try {

src/lib/datastore.js

@@ -134,6 +134,8 @@ export async function updateHabit(id, updates) {
     console.warn('Supabase updateHabit error, writing local:', error.message);
     return local.updateHabit(id, updates);
   }
+  // After any update, trigger a sync to ensure all local changes (including categories) are pushed to remote
+  await syncLocalToRemoteIfNeeded();
 }
 
 export async function deleteHabit(id) {
@@ -206,15 +208,10 @@ export async function syncLocalToRemoteIfNeeded() {
   const user = await getAuthUser();
   if (!user) return;
 
-  const already = localStorage.getItem(SYNC_FLAG);
+  // Always upsert all local habits to Supabase after login
-  const { data: remote, error } = await supabase.from('habits').select('id').limit(1);
-  if (error) return;
-
-  if (!already || (remote || []).length === 0) {
   let habits = local.getHabits();
   if (habits.length === 0) return localStorage.setItem(SYNC_FLAG, new Date().toISOString());
   habits = ensureUUIDs(habits);
-    // Persist back to local so IDs match remote after upsert
   localStorage.setItem('habitgrid_data', JSON.stringify(habits));
   const rows = habits.map(h => ({
     id: h.id,
@@ -232,7 +229,6 @@ export async function syncLocalToRemoteIfNeeded() {
   await supabase.from('habits').upsert(rows, { onConflict: 'id' });
   localStorage.setItem(SYNC_FLAG, new Date().toISOString());
 }
-}
 
 
 // Helper: Download JSON backup of local habits

src/pages/HomePage.jsx

@@ -1,6 +1,6 @@
 import React, { useState, useEffect } from 'react';
 import { DragDropContext, Droppable, Draggable } from '@hello-pangea/dnd';
-import { useNavigate } from 'react-router-dom';
+// ...existing code...
 import { motion, AnimatePresence } from 'framer-motion';
 import { Plus, Settings, TrendingUp, Flame, Calendar, Moon, Sun } from 'lucide-react';
 import { Button } from '../components/ui/button';
@@ -10,6 +10,7 @@ import AnimatedCounter from '../components/AnimatedCounter';
 import GitActivityGrid from '../components/GitActivityGrid';
 import { getGitEnabled } from '../lib/git';
 import { getHabits, updateHabit, syncLocalToRemoteIfNeeded, syncRemoteToLocal, getAuthUser } from '../lib/datastore';
+import { useNavigate } from 'react-router-dom';
 
 const HomePage = () => {
   const navigate = useNavigate();
@@ -84,6 +85,15 @@ const HomePage = () => {
     navigate('/add');
   };
 
+  const handleLoginSync = () => {
+    navigate('/login');
+  };
+
+  const handleManualSync = async () => {
+    await syncLocalToRemoteIfNeeded();
+    toast({ title: 'Synced!', description: 'Your habits have been synced to the cloud.' });
+  };
+
   return (
     <div className="min-h-screen bg-gradient-to-br from-slate-50 via-white to-slate-50 dark:from-slate-950 dark:via-slate-900 dark:to-slate-950">
       <div className="max-w-6xl mx-auto px-4 py-6 sm:px-6 lg:px-8">
@@ -123,6 +133,7 @@ const HomePage = () => {
           </div>
         </motion.div>
 
+        
         {/* Stats Overview */}
         {habits.length > 0 && (
           <motion.div
@@ -157,6 +168,8 @@ const HomePage = () => {
           </motion.div>
         )}
 
+        
+
         {/* Habits List */}
         {/* Grouped Habits by Category, collapsible, and uncategorized habits outside */}
         <DragDropContext
@@ -234,7 +247,8 @@ const HomePage = () => {
                 ...Object.values(grouped).flat()
               ];
             }
-            setTimeout(loadHabits, 0); // reload instantly after update
+            // Force immediate UI update after all updates
+            loadHabits();
           }}
         >
           <div className="space-y-6">
@@ -365,10 +379,35 @@ const HomePage = () => {
                 <Plus className="w-5 h-5 mr-2" />
                 Create First Habit
               </Button>
+
+              {/* Call to Action for Login/Sync */}
+        <div className="mb-6 flex flex-col items-center mt-8">
+          {!loggedIn ? (
+            <Button
+              onClick={handleLoginSync}
+              size="lg"
+              className="rounded-full shadow-lg bg-emerald-600 text-white hover:bg-emerald-700 transition"
+            >
+              <Flame className="w-5 h-5 mr-2" />
+              Login & Sync My Habits
+            </Button>
+          ) : (
+            <Button
+              onClick={handleManualSync}
+              size="lg"
+              className="rounded-full shadow-lg bg-blue-600 text-white hover:bg-blue-700 transition"
+            >
+              <Plus className="w-5 h-5 mr-2" />
+              Sync My Habits Now
+            </Button>
+          )}
+        </div>
             </motion.div>
           )
         )}
 
+        
+
         {/* Add Button */}
         {habits.length > 0 && (
           <motion.div