docs: Update Status.md with scheduled sync persistence fix

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Status.md

@@ -1,55 +1,148 @@
 # HVAC Community Events - Project Status
 
-**Last Updated:** December 16, 2025  
+**Last Updated:** December 20, 2025
-**Current Session:** Gemini Development Transition & PHP 8+ Validation  
+**Current Session:** Scheduled Sync Persistence Fix - Complete
-**Version:** 2.1.7 (Staging)
+**Version:** 2.1.11 (Deployed to Production)
 
 ---
 
-## 🎯 CURRENT SESSION - ZOHO CRM INTEGRATION SETUP (Dec 16, 2025)
+## 🎯 CURRENT SESSION - SCHEDULED SYNC PERSISTENCE FIX (Dec 20, 2025)
 
-### Zoho CRM Integration - Production Issue (BLOCKING)
+### Status: ✅ **COMPLETE - Deployed to Production**
 
-**Objective:** Configure and test Zoho CRM sync implementation for production environment.
+**Problem:** Scheduled sync showed "Not Scheduled" after page refresh, even though settings were saved correctly.
 
-**Status:** 🔴 BLOCKING - Credential save hangs on production (400 Bad Request)
+**Root Cause:**
+- `HVAC_Zoho_Scheduled_Sync` was only loaded in admin context
+- On non-admin requests (including WP-Cron), custom cron schedules weren't registered
+- WordPress was clearing cron events because it didn't recognize the schedules
 
-### Active Issue - Credential Save Hanging on Production
+### Fixes Applied
+1. ✅ **Load Scheduled Sync on ALL Requests** (`class-hvac-plugin.php`)
+   - Moved `HVAC_Zoho_Scheduled_Sync::instance()` initialization to main plugin loader
+   - Now loads alongside other schedulers (like Communication Scheduler)
+   - Ensures cron schedules and action hooks are always registered
 
-**Problem:** When saving Zoho CRM credentials at `https://upskillhvac.com/wp-admin/admin.php?page=hvac-zoho-sync`, the AJAX request returns a 400 Bad Request error and the form hangs on "Saving...".
+2. ✅ **Add `add_option` Hook** (`class-zoho-scheduled-sync.php`)
+   - Added `add_option_hvac_zoho_auto_sync` hook for first-time setting creation
+   - WordPress fires `add_option_` (not `update_option_`) on first save
 
-**Console Error:**
+3. ✅ **Explicit Scheduling in Save** (`class-zoho-admin.php`)
-```
+   - `save_settings()` now explicitly calls `schedule_sync()` or `unschedule_sync()`
-POST https://upskillhvac.com/wp-admin/admin-ajax.php 400 (Bad Request)
+   - Ensures scheduling works even when option value hasn't changed
-```
+   - `update_option_` hook only fires when value actually changes
 
-**Investigation Completed:**
+### Files Modified
-1. ✅ Fixed Client ID regex to allow lowercase letters (`[A-Z0-9]` → `[A-Za-z0-9]`)
+- `includes/class-hvac-plugin.php` - Load scheduled sync globally
-2. ✅ Fixed credential storage mismatch - all methods now use `HVAC_Secure_Storage`
+- `includes/zoho/class-zoho-scheduled-sync.php` - Add first-time option hook
-3. ✅ Updated `HVAC_Zoho_CRM_Auth` class to use encrypted storage consistently
+- `includes/admin/class-zoho-admin.php` - Explicit scheduling call
-4. ✅ Updated OAuth callback to use secure storage
-5. ✅ Updated test_connection to use secure storage
-6. ✅ Deployed fixes to production - **Issue persists**
-
-**Files Modified:**
-- `includes/admin/class-zoho-admin.php` - Secure storage for credentials, fixed regex
-- `includes/zoho/class-zoho-crm-auth.php` - All credential operations use HVAC_Secure_Storage
-
-**Next Steps for Investigation:**
-1. Check PHP error logs on production server for detailed error
-2. Test AJAX endpoint directly via curl to isolate frontend vs backend issue
-3. Verify nonce generation and validation on production
-4. Check if WAF/security plugin is blocking the request
-5. Test with browser network tab to see exact request/response
-
-**Possible Causes:**
-- Server-side security rules (Cloudflare, ModSecurity) blocking POST to admin-ajax.php
-- Nonce validation failing due to caching
-- Plugin conflict on production
-- HVAC_Secure_Storage encryption key difference between environments
 
 ---
 
+## 📋 PREVIOUS SESSION - SCHEDULED ZOHO SYNC (Dec 19, 2025)
+
+### Status: ✅ **COMPLETE - WP-Cron Scheduled Sync Implemented**
+
+**Summary:**
+- **Scheduled Sync:** WP-Cron job syncs new/modified records on configurable interval
+- **Incremental Sync:** Only syncs records modified since last sync run
+- **Admin UI:** Enable/disable toggle, interval selector (5min-daily), status display
+- **Manual Trigger:** "Run Sync Now" button for testing
+
+### Changes Made
+1. ✅ **New File: `class-zoho-scheduled-sync.php`**
+   - WP-Cron management with custom intervals
+   - `run_scheduled_sync()` processes all data types
+   - Tracks last sync time for incremental filtering
+   - Stores results for status display
+
+2. ✅ **Updated `class-zoho-sync.php`**
+   - All 5 sync methods now accept `$since_timestamp` parameter
+   - When provided, filters queries by `post_modified >= since_date`
+
+3. ✅ **Updated `class-zoho-admin.php`**
+   - Added `save_settings()` AJAX handler
+   - Added `run_scheduled_sync_now()` AJAX handler
+   - Enhanced admin UI with new intervals and status display
+
+4. ✅ **Updated `zoho-admin.js`**
+   - Settings form reloads page on save
+   - "Run Sync Now" button with result display
+
+### Interval Options
+| Value | Frequency |
+|-------|-----------|
+| `every_5_minutes` | Every 5 minutes (default) |
+| `every_15_minutes` | Every 15 minutes |
+| `every_30_minutes` | Every 30 minutes |
+| `hourly` | Hourly |
+| `every_6_hours` | Every 6 hours |
+| `daily` | Daily |
+
+### Admin Page Location
+- `/wp-admin/admin.php?page=hvac-zoho-sync`
+- Look for "Scheduled Sync Settings" section
+
+---
+
+## 📋 PREVIOUS SESSION - BATCH SYNC ENHANCEMENT (Dec 18, 2025)
+
+### Status: ✅ **COMPLETE - All Sync Tasks Now Auto-Iterate with Progress Bar**
+
+**Summary:** 
+- **All 5 Sync Types:** Now support batch pagination with auto-continue
+- **Progress Bar:** Visual feedback showing `X of Y processed (N%)`
+- **No Manual Repeating:** Frontend auto-loops until `has_more: false`
+- **Orphan Cleanup:** Deleted 14 test attendees referencing deleted events
+
+### Changes Made
+1. ✅ **Backend Pagination:**
+   - All sync methods (`sync_events`, `sync_users`, `sync_attendees`, `sync_rsvps`, `sync_purchases`) now accept `$offset` and `$limit` parameters
+   - Each returns `has_more`, `next_offset`, and `total` for pagination
+   - Admin endpoint updated to pass offset to sync methods
+2. ✅ **Frontend Progress UI:**
+   - New `syncWithProgress()` function replaces single AJAX calls
+   - Auto-continues batches until complete
+   - Progress bar shows percentage and count
+   - Accumulated results across all batches
+
+### Files Modified
+- `includes/zoho/class-zoho-sync.php` - Pagination for all 5 sync methods
+- `includes/admin/class-zoho-admin.php` - Offset parameter handling
+- `assets/js/zoho-admin.js` - Progress bar + auto-continue logic
+
+---
+
+## 📋 PREVIOUS SESSION - ZOHO CRM ATTENDEE SYNC (Dec 17-18, 2025)
+
+### Status: ✅ **COMPLETE - All Attendees Syncing Successfully**
+
+**Summary:** 
+- **Events Sync:** ✅ WORKING. 39 events synced with enhanced field mapping.
+- **Attendees Sync:** ✅ WORKING. 50/50 synced, 0 errors, all contacts updated with custom fields.
+
+### Issues Resolved
+1. ✅ **Campaign Member Linking:**
+   - Fixed API endpoint: `PUT /Contacts/{id}/Campaigns` (was `/Campaigns/{id}/Contacts/{id}`)
+   - Fixed `log_debug()` visibility (private → public)
+2. ✅ **Attendee Field Mapping:**
+   - measureQuick Email → `Email` (primary, used for lookup)
+   - Attendee Email → `Secondary_Email`
+   - Attendee Cell Phone → `Mobile`
+   - Company Role → `Primary_Role`
+   - Fixed meta key: `_tec_tickets_commerce_attendee_fields` with hyphenated field names
+3. ✅ **Email Fallback Logic:**
+   - If attendee email empty, use measureQuick email (and vice versa)
+   - Only fails if BOTH emails are empty
+4. ✅ **DUPLICATE_DATA Handling:**
+   - When Zoho returns "duplicate exists", extract existing contact ID from error
+   - Use that ID to update instead of failing
+5. ✅ **Existing Contact Updates:**
+   - Existing contacts now updated via PUT with new field data on each sync
+
+---
+
+
 ### Zoho CRM Integration - Staging Environment (Working)
 
 **Status:** ✅ OAuth Working, Sync Methods Implemented, Dry-Run Tested
@@ -242,7 +335,7 @@ DISPLAY=:1 HEADLESS=false node test-comprehensive-validation.js
 
 ### Production Environment  
 **URL:** https://upskillhvac.com  
-**Version:** 2.1.7 (pending deployment)  
+**Version:** 2.1.8 (latest)  
 **Server:** Cloudways Shared VPS
 
 ---