Fix Supabase client proxy

src/hooks/useUnitPreferences.ts

@@ -101,6 +101,8 @@ export function useUnitPreferences() {
               user_id: user.id,
               unit_preferences: newPreferences as unknown as Json,
               updated_at: new Date().toISOString()
+            }, {
+              onConflict: 'user_id'
             });
           
           if (error) {

src/lib/supabaseClient.ts

@@ -10,6 +10,62 @@ import { breadcrumb } from './errorBreadcrumbs';
 
 type SupabaseClient = typeof baseClient;
 
+/**
+ * Create a recursive proxy for query builders that tracks terminal method calls
+ */
+function createQueryProxy(queryBuilder: any, endpoint: string, operations: string[] = []): any {
+  return new Proxy(queryBuilder, {
+    get(target, prop: string | symbol) {
+      const value = target[prop];
+      
+      if (typeof value !== 'function') {
+        return value;
+      }
+      
+      // Terminal methods that execute queries and return promises
+      const terminalMethods = ['then', 'single', 'maybeSingle'];
+      
+      if (terminalMethods.includes(String(prop))) {
+        // Wrap terminal method to log breadcrumb when promise resolves
+        return function(...args: any[]) {
+          const result = value.apply(target, args);
+          const fullOperation = operations.join('.');
+          
+          // Intercept promise resolution to log breadcrumb
+          if (result && typeof result.then === 'function') {
+            return result.then(
+              (response: any) => {
+                // Log successful API call
+                breadcrumb.apiCall(
+                  endpoint,
+                  fullOperation || 'query',
+                  response?.error ? 400 : 200
+                );
+                return response;
+              },
+              (error: any) => {
+                // Log failed API call
+                breadcrumb.apiCall(endpoint, fullOperation || 'query', 500);
+                throw error;
+              }
+            );
+          }
+          
+          return result;
+        };
+      }
+      
+      // Builder methods - pass through synchronously and continue proxying
+      return function(...args: any[]) {
+        const result = value.apply(target, args);
+        
+        // Continue proxying the returned builder with accumulated operations
+        return createQueryProxy(result, endpoint, [...operations, String(prop)]);
+      };
+    }
+  });
+}
+
 /**
  * Wrap Supabase client to automatically track API calls as breadcrumbs
  */
@@ -24,36 +80,8 @@ function wrapSupabaseClient(client: SupabaseClient): SupabaseClient {
           const result = (value as any).apply(target, args);
           const endpoint = prop === 'from' ? `/table/${args[0]}` : `/rpc/${args[0]}`;
           
-          // Return a proxy for chained query methods
+          // Return a recursive proxy that tracks the query chain
-          return new Proxy(result, {
+          return createQueryProxy(result, endpoint, []);
-            get(queryTarget: any, queryProp: string | symbol) {
-              const queryValue = queryTarget[queryProp];
-              
-              // If it's a function, wrap it to track the call
-              if (typeof queryValue === 'function') {
-                return async (...queryArgs: any[]) => {
-                  try {
-                    const response = await queryValue.apply(queryTarget, queryArgs);
-                    
-                    // Log breadcrumb after response
-                    breadcrumb.apiCall(
-                      endpoint,
-                      String(queryProp).toUpperCase(),
-                      response.error ? 400 : 200
-                    );
-                    
-                    return response;
-                  } catch (error) {
-                    // Log breadcrumb for exceptions
-                    breadcrumb.apiCall(endpoint, String(queryProp).toUpperCase(), 500);
-                    throw error;
-                  }
-                };
-              }
-              
-              return queryValue;
-            }
-          });
         };
       }