refactor: migrate analytics controllers from LemonSqueezy to PayPal

- Replace LemonSqueezyService with PayPalService in analytics controllers
- Update all hasFeatureAccess calls to use PayPal service
- Remove LemonSqueezy service instantiation that was causing startup warnings
- Maintain same feature access logic but with PayPal subscription system

This eliminates the 'LemonSqueezy API key or Store ID not configured'
warning message on startup since we've fully migrated to PayPal.

Author: GigaElk

backend/src/controllers/analyticsController.ts

@@ -1,9 +1,9 @@
 import { Request, Response } from 'express';
 import { AnalyticsService } from '../services/analyticsService';
-import { LemonSqueezyService } from '../services/lemonSqueezyService';
+import { PayPalService } from '../services/paypalService';
 
 const analyticsService = AnalyticsService.getInstance();
-const lemonSqueezyService = LemonSqueezyService.getInstance();
+const paypalService = PayPalService.getInstance();
 
 export class AnalyticsController {
   /**
@@ -23,7 +23,7 @@ export class AnalyticsController {
       }
 
       // Check if user has access to personal analytics
-      const hasAccess = await lemonSqueezyService.hasFeatureAccess(req.user.userId, 'personal_analytics');
+      const hasAccess = await paypalService.hasFeatureAccess(req.user.userId, 'personal_analytics');
       if (!hasAccess) {
         return res.status(403).json({
           error: {
@@ -86,7 +86,7 @@ export class AnalyticsController {
       }
 
       // Check if user has access to personal analytics
-      const hasAccess = await lemonSqueezyService.hasFeatureAccess(req.user.userId, 'personal_analytics');
+      const hasAccess = await paypalService.hasFeatureAccess(req.user.userId, 'personal_analytics');
       if (!hasAccess) {
         return res.status(403).json({
           error: {
@@ -149,7 +149,7 @@ export class AnalyticsController {
       }
 
       // Check if user has access to personal analytics
-      const hasAccess = await lemonSqueezyService.hasFeatureAccess(req.user.userId, 'personal_analytics');
+      const hasAccess = await paypalService.hasFeatureAccess(req.user.userId, 'personal_analytics');
       if (!hasAccess) {
         return res.status(403).json({
           error: {
@@ -212,7 +212,7 @@ export class AnalyticsController {
       }
 
       // Check if user has access to personal analytics
-      const hasAccess = await lemonSqueezyService.hasFeatureAccess(req.user.userId, 'personal_analytics');
+      const hasAccess = await paypalService.hasFeatureAccess(req.user.userId, 'personal_analytics');
       if (!hasAccess) {
         return res.status(403).json({
           error: {

backend/src/controllers/demographicAnalyticsController.ts

@@ -1,9 +1,9 @@
 import { Request, Response } from 'express';
 import { DemographicAnalyticsService } from '../services/demographicAnalyticsService';
-import { LemonSqueezyService } from '../services/lemonSqueezyService';
+import { PayPalService } from '../services/paypalService';
 
 const demographicAnalyticsService = DemographicAnalyticsService.getInstance();
-const lemonSqueezyService = LemonSqueezyService.getInstance();
+const paypalService = PayPalService.getInstance();
 
 export class DemographicAnalyticsController {
   /**
@@ -23,7 +23,7 @@ export class DemographicAnalyticsController {
       }
 
       // Check if user has access to demographic analytics (Premium feature)
-      const hasAccess = await lemonSqueezyService.hasFeatureAccess(req.user.userId, 'demographic_analytics');
+      const hasAccess = await paypalService.hasFeatureAccess(req.user.userId, 'demographic_analytics');
       if (!hasAccess) {
         return res.status(403).json({
           error: {
@@ -87,7 +87,7 @@ export class DemographicAnalyticsController {
       }
 
       // Check if user has access to demographic analytics
-      const hasAccess = await lemonSqueezyService.hasFeatureAccess(req.user.userId, 'demographic_analytics');
+      const hasAccess = await paypalService.hasFeatureAccess(req.user.userId, 'demographic_analytics');
       if (!hasAccess) {
         return res.status(403).json({
           error: {
@@ -150,7 +150,7 @@ export class DemographicAnalyticsController {
       }
 
       // Check if user has access to demographic analytics
-      const hasAccess = await lemonSqueezyService.hasFeatureAccess(req.user.userId, 'demographic_analytics');
+      const hasAccess = await paypalService.hasFeatureAccess(req.user.userId, 'demographic_analytics');
       if (!hasAccess) {
         return res.status(403).json({
           error: {
@@ -213,7 +213,7 @@ export class DemographicAnalyticsController {
       }
 
       // Check if user has access to demographic analytics
-      const hasAccess = await lemonSqueezyService.hasFeatureAccess(req.user.userId, 'demographic_analytics');
+      const hasAccess = await paypalService.hasFeatureAccess(req.user.userId, 'demographic_analytics');
       if (!hasAccess) {
         return res.status(403).json({
           error: {
@@ -267,7 +267,7 @@ export class DemographicAnalyticsController {
       }
 
       // Check if user has access to demographic analytics
-      const hasAccess = await lemonSqueezyService.hasFeatureAccess(req.user.userId, 'demographic_analytics');
+      const hasAccess = await paypalService.hasFeatureAccess(req.user.userId, 'demographic_analytics');
       if (!hasAccess) {
         return res.status(403).json({
           error: {