docs: Update PROGRESS_NOTE with notification system refinement

## 📝 Documentation Update

Added comprehensive progress note for notification system work completed on November 11, 2025.

### Documented:

**Phase 1: UI/UX Refinements**
- Channels page simplification
- Events page density reduction
- Visual improvements

**Phase 2: Critical Bug Fixes**
- Toggle not saving (get_json_params fix)
- Multiple API calls (optimistic update removal)
- Wrong event defaults (data structure fix)
- Events cannot be enabled (path fix)

**Phase 3: Push URL Strategy**
- Dynamic URLs recommendation
- Event-specific deep linking
- Template variables support
- Implementation plan

### Testing Results:
- All toggles working correctly
- State persistence verified
- Network optimization confirmed

### Next Steps:
- Dynamic push notification URLs
- Per-event URL configuration
- Rich notification content

---

**Status:** ✅ All issues resolved and documented

PROGRESS_NOTE.md

@@ -1,6 +1,6 @@
 # WooNooW Project Progress Note
 
-**Last Updated:** November 8, 2025, 7:30 PM (GMT+7)
+**Last Updated:** November 11, 2025, 4:10 PM (GMT+7)
 
 ## Overview
 WooNooW is a hybrid WordPress + React SPA replacement for WooCommerce Admin. It focuses on performance, UX consistency, and extensibility with SSR-safe endpoints and REST-first design. The plugin integrates deeply with WooCommerce’s data store (HPOS ready) and provides a modern React-based dashboard and order management system.
@@ -2451,3 +2451,272 @@ const actions = (
 **Implementation Date:** November 8, 2025  
 **Status:** ✅ Production Ready  
 **Next Milestone:** Apply mobile patterns to other modules
+
+---
+
+## 🔔 Notification System Refinement — November 11, 2025
+
+### ✅ COMPLETE - UI/UX Improvements & Toggle Logic Fixes
+
+**Goal:** Simplify notification settings UI and fix critical toggle bugs.
+
+### 🎯 Phase 1: UI/UX Refinements
+
+#### **Channels Page Improvements**
+
+**Changes Made:**
+1. ✅ Removed redundant "Active/Inactive" badge (color indicates state)
+2. ✅ Renamed "Built-in Channels" → "Channels" (unified card)
+3. ✅ Moved "Built-in" badge inline with channel title
+4. ✅ Removed redundant "Subscribe" toggle for push notifications
+5. ✅ Unified enable/disable toggle for all channels
+6. ✅ Auto-subscribe when enabling push channel
+7. ✅ Green icon when enabled, gray when disabled
+
+**Layout:**
+```
+┌─────────────────────────────────────────┐
+│ Channels                                │
+├─────────────────────────────────────────┤
+│ 📧 Email [Built-in]                     │
+│    Email notifications powered by...    │
+│    [Enabled ●] [Configure]              │
+├─────────────────────────────────────────┤
+│ 🔔 Push Notifications [Built-in]        │
+│    Browser push notifications...        │
+│    [Disabled ○] [Configure]             │
+└─────────────────────────────────────────┘
+```
+
+#### **Events Page Improvements**
+
+**Changes Made:**
+1. ✅ Removed event-level toggle (reduced visual density)
+2. ✅ Cleaner header layout
+3. ✅ Focus on per-channel toggles only
+
+**Before:**
+```
+Order Placed                    [Toggle]
+├─ Email    [Toggle] Admin
+└─ Push     [Toggle] Admin
+```
+
+**After:**
+```
+Order Placed
+├─ Email    [Toggle] Admin
+└─ Push     [Toggle] Admin
+```
+
+### 🐛 Phase 2: Critical Bug Fixes
+
+#### **Issue 1: Toggle Not Saving**
+
+**Problem:** Channel toggle always returned `enabled: true`, changes weren't saved
+
+**Root Cause:** Backend using `get_param()` instead of `get_json_params()`
+
+**Fix:**
+```php
+// Before
+$channel_id = $request->get_param('channelId');
+$enabled = $request->get_param('enabled');
+
+// After
+$params = $request->get_json_params();
+$channel_id = isset($params['channelId']) ? $params['channelId'] : null;
+$enabled = isset($params['enabled']) ? $params['enabled'] : null;
+```
+
+**Result:** Toggle state now persists correctly ✅
+
+---
+
+#### **Issue 2: Multiple API Calls**
+
+**Problem:** Single toggle triggered 3 network requests
+
+**Root Cause:** Optimistic update + `onSettled` refetch caused race condition
+
+**Fix:**
+```typescript
+// Removed optimistic update
+// Now uses server response directly
+onSuccess: (data, variables) => {
+  queryClient.setQueryData(['notification-channels'], (old) => 
+    old.map(channel => 
+      channel.id === variables.channelId 
+        ? { ...channel, enabled: data.enabled }
+        : channel
+    )
+  );
+}
+```
+
+**Result:** Only 1 request per toggle ✅
+
+---
+
+#### **Issue 3: Wrong Event Channel Defaults**
+
+**Problem:** 
+- Email showing as enabled by default (should be disabled)
+- Push showing as disabled (inconsistent)
+- Backend path was wrong
+
+**Root Cause:** 
+1. Wrong path: `$settings['event_id']` instead of `$settings['event_id']['channels']`
+2. Defaults set to `true` instead of `false`
+
+**Fix:**
+```php
+// Before
+'channels' => $settings['order_placed'] ?? ['email' => ['enabled' => true, ...]]
+
+// After  
+'channels' => $settings['order_placed']['channels'] ?? [
+    'email' => ['enabled' => false, 'recipient' => 'admin'],
+    'push' => ['enabled' => false, 'recipient' => 'admin']
+]
+```
+
+**Result:** Events page shows correct defaults ✅
+
+---
+
+#### **Issue 4: Events Cannot Be Enabled**
+
+**Problem:** All event channels disabled and cannot be enabled
+
+**Root Cause:** Wrong data structure in `update_event()`
+
+**Fix:**
+```php
+// Before
+$settings[$event_id][$channel_id] = [...];
+// Saved as: { "order_placed": { "email": {...} } }
+
+// After
+$settings[$event_id]['channels'][$channel_id] = [...];
+// Saves as: { "order_placed": { "channels": { "email": {...} } } }
+```
+
+**Result:** Event toggles save correctly ✅
+
+### 📊 Data Structure
+
+**Correct Structure:**
+```php
+[
+  'order_placed' => [
+    'channels' => [
+      'email' => ['enabled' => true, 'recipient' => 'admin'],
+      'push' => ['enabled' => false, 'recipient' => 'admin']
+    ]
+  ]
+]
+```
+
+### 🎯 Phase 3: Push Notification URL Strategy
+
+**Question:** Should push notification URL be static or dynamic?
+
+**Answer:** **Dynamic based on context** for better UX
+
+**Recommended Approach:**
+
+```php
+// Event-specific URLs
+$notification_urls = [
+    'order_placed'    => '/wp-admin/admin.php?page=woonoow#/orders/{order_id}',
+    'order_completed' => '/wp-admin/admin.php?page=woonoow#/orders/{order_id}',
+    'low_stock'       => '/wp-admin/admin.php?page=woonoow#/products/{product_id}',
+    'out_of_stock'    => '/wp-admin/admin.php?page=woonoow#/products/{product_id}',
+    'new_customer'    => '/wp-admin/admin.php?page=woonoow#/customers/{customer_id}',
+];
+```
+
+**Benefits:**
+- ✅ Better UX - Direct navigation to relevant page
+- ✅ Context-aware - Order notification → Order detail
+- ✅ Actionable - User can immediately take action
+- ✅ Professional - Industry standard (Gmail, Slack, etc.)
+
+**Implementation Plan:**
+1. Add `notification_url` field to push settings
+2. Support template variables: `{order_id}`, `{product_id}`, `{customer_id}`
+3. Per-event URL configuration in Templates page
+4. Default fallback: `/wp-admin/admin.php?page=woonoow#/orders`
+
+**Current State:**
+- Global URL in push configuration: `/wp-admin/admin.php?page=woonoow#/orders`
+- **Recommendation:** Keep as default, add per-event override in Templates
+
+### 📚 Documentation Created
+
+1. **NOTIFICATION_LOGIC.md** - Complete logic explanation
+   - Toggle hierarchy
+   - Decision logic with examples
+   - Implementation details
+   - Usage examples
+   - Testing checklist
+
+2. **NotificationManager.php** - Backend validation class
+   - `is_channel_enabled()` - Global state
+   - `is_event_channel_enabled()` - Event state
+   - `should_send_notification()` - Combined validation
+   - `send()` - Notification sending
+
+### ✅ Testing Results
+
+**Channels Page:**
+- [x] Toggle email off → Stays off ✅
+- [x] Toggle email on → Stays on ✅
+- [x] Toggle push off → Does NOT affect email ✅
+- [x] Toggle push on → Does NOT affect email ✅
+- [x] Reload page → States persist ✅
+
+**Events Page:**
+- [x] Enable email for "Order Placed" → Saves ✅
+- [x] Enable push for "Order Placed" → Saves ✅
+- [x] Disable email → Does NOT affect push ✅
+- [x] Reload page → States persist ✅
+- [x] Enable multiple events → All save independently ✅
+
+**Network Tab:**
+- [x] Each toggle = 1 request only ✅
+- [x] Response includes correct `enabled` value ✅
+- [x] No race conditions ✅
+
+### 📊 Files Changed
+
+**Backend:**
+- `includes/Api/NotificationsController.php` - 3 methods fixed
+- `includes/Core/Notifications/NotificationManager.php` - New class
+
+**Frontend:**
+- `admin-spa/src/routes/Settings/Notifications/Channels.tsx` - UI simplified, mutation fixed
+- `admin-spa/src/routes/Settings/Notifications/Events.tsx` - Event-level toggle removed
+
+**Documentation:**
+- `NOTIFICATION_LOGIC.md` - Complete logic documentation
+
+### 🎯 Next Steps
+
+**Immediate:**
+- [ ] Implement dynamic push notification URLs per event
+- [ ] Add URL template variables support
+- [ ] Add per-event URL configuration in Templates page
+
+**Future:**
+- [ ] Push notification icon per event type
+- [ ] Push notification image per event (product image, customer avatar)
+- [ ] Rich notification content (order items, product details)
+- [ ] Notification actions (Mark as read, Quick reply)
+
+---
+
+**Implementation Date:** November 11, 2025  
+**Status:** ✅ Production Ready  
+**Next Milestone:** Dynamic push notification URLs