Merge branch 'main' into fix/antigravity_auth_3

backend/internal/repository/account_repo.go

@@ -334,7 +334,7 @@ func (r *accountRepository) BatchUpdateLastUsed(ctx context.Context, updates map
 
 	idx := 1
 	for id, ts := range updates {
-		caseSQL += " WHEN $" + itoa(idx) + " THEN $" + itoa(idx+1)
+		caseSQL += " WHEN $" + itoa(idx) + " THEN $" + itoa(idx+1) + "::timestamptz"
 		args = append(args, id, ts)
 		ids = append(ids, id)
 		idx += 2

backend/internal/service/account_test_service.go

@@ -335,7 +335,7 @@ func (s *AccountTestService) testOpenAIAccountConnection(c *gin.Context, account
 		if baseURL == "" {
 			baseURL = "https://api.openai.com"
 		}
-		apiURL = strings.TrimSuffix(baseURL, "/") + "/v1/responses"
+		apiURL = strings.TrimSuffix(baseURL, "/") + "/responses"
 	} else {
 		return s.sendErrorAndEnd(c, fmt.Sprintf("Unsupported account type: %s", account.Type))
 	}

backend/internal/service/openai_gateway_service.go

@@ -371,7 +371,7 @@ func (s *OpenAIGatewayService) buildUpstreamRequest(ctx context.Context, c *gin.
 		// API Key accounts use Platform API or custom base URL
 		baseURL := account.GetOpenAIBaseURL()
 		if baseURL != "" {
-			targetURL = baseURL + "/v1/responses"
+			targetURL = baseURL + "/responses"
 		} else {
 			targetURL = openaiPlatformAPIURL
 		}