fix: improve customer lookup to prevent duplicate customers in Dodo

- Modified ensureDodoCustomer() to query existing customers by email before creating new ones
- This prevents duplicate customer records when dodoCustomerId is missing from database
- Added logging for both found existing customers and new customer creation
- Updated subscription lookup to check multiple statuses (active, pending, on_hold)
- Should resolve paid-to-paid and paid-to-free plan change issues for users missing subscription IDs

chat/server.js

@@ -6763,6 +6763,39 @@ async function ensureDodoCustomer(user) {
   if (user.dodoCustomerId) return user.dodoCustomerId;
   const email = user.billingEmail || user.email || '';
   if (!email) return '';
+  
+  // First, try to find existing customer by email
+  try {
+    const existingCustomers = await dodoRequest('/customers', {
+      method: 'GET',
+      query: { email: email }
+    });
+    
+    // Check if any customers were returned
+    if (existingCustomers?.items && existingCustomers.items.length > 0) {
+      const existingCustomer = existingCustomers.items[0];
+      const customerId = existingCustomer?.customer_id || existingCustomer?.id || '';
+      if (customerId) {
+        user.dodoCustomerId = customerId;
+        await persistUsersDb();
+        log('Found existing Dodo customer by email', {
+          userId: user.id,
+          email: email,
+          customerId: customerId
+        });
+        return customerId;
+      }
+    }
+  } catch (error) {
+    // Log the lookup failure but continue to create new customer
+    log('Failed to lookup existing Dodo customer by email', {
+      userId: user.id,
+      email: email,
+      error: String(error)
+    });
+  }
+  
+  // If no existing customer found, create a new one
   const customers = await dodoRequest('/customers', {
     method: 'POST',
     body: {
@@ -6775,6 +6808,11 @@ async function ensureDodoCustomer(user) {
   if (customerId) {
     user.dodoCustomerId = customerId;
     await persistUsersDb();
+    log('Created new Dodo customer', {
+      userId: user.id,
+      email: email,
+      customerId: customerId
+    });
   }
   return customerId;
 }
@@ -12121,21 +12159,28 @@ async function handleAccountSettingsUpdate(req, res) {
         const customerId = await ensureDodoCustomer(user);
         if (!customerId) return null;
         
-        const subscriptions = await dodoRequest('/subscriptions', {
-          method: 'GET',
-          query: { customer_id: customerId, status: 'active' }
-        });
+        // Check multiple subscription statuses: active, pending, on_hold
+        const statusesToCheck = ['active', 'pending', 'on_hold'];
         
-        if (subscriptions?.items && subscriptions.items.length > 0) {
-          const activeSub = subscriptions.items[0];
-          log('Found missing subscription ID via Dodo lookup', {
-            userId: user.id,
-            email: user.email,
-            subscriptionId: activeSub.subscription_id || activeSub.id,
-            customerId
+        for (const status of statusesToCheck) {
+          const subscriptions = await dodoRequest('/subscriptions', {
+            method: 'GET',
+            query: { customer_id: customerId, status: status }
           });
-          return activeSub.subscription_id || activeSub.id;
+          
+          if (subscriptions?.items && subscriptions.items.length > 0) {
+            const foundSub = subscriptions.items[0];
+            log('Found missing subscription ID via Dodo lookup', {
+              userId: user.id,
+              email: user.email,
+              subscriptionId: foundSub.subscription_id || foundSub.id,
+              status: status,
+              customerId
+            });
+            return foundSub.subscription_id || foundSub.id;
+          }
         }
+        
         return null;
       } catch (error) {
         log('Failed to lookup subscription by customer', {