fix(tests): handle all Close() and Decode() errors across integration tests

Replace all unhandled resp.Body.Close() calls throughout the test suite:

- Deferred calls: replace 'defer VAR.Body.Close()' with a closure that explicitly
  discards the error via 'defer func(Body io.ReadCloser) { _ = Body.Close() }(VAR.Body)'
- Immediate calls: replace 'VAR.Body.Close()' with '_ = VAR.Body.Close()'

Replace all unhandled json.NewDecoder(VAR.Body).Decode(&x) calls with error capture
and require.NoError assertion. Files using httptest.ResponseRecorder (collections_preview,
processing_issues) use 'err :=' declaration; suite-style tests (scanner_integration,
dashboard_integration) use s.T() instead of t.

cmd/server/tests/dashboard_integration_test.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"io"
 	"net/http"
 	"testing"
 
@@ -40,7 +41,9 @@ func (s *DashboardIntegrationTestSuite) TestGetSections_EndToEndFlow() {
 	client := &http.Client{}
 	resp, err := client.Do(req)
 	require.NoError(s.T(), err)
-	defer resp.Body.Close()
+	defer func(Body io.ReadCloser) {
+		_ = Body.Close()
+	}(resp.Body)
 
 	assert.Equal(s.T(), http.StatusOK, resp.StatusCode)
 
@@ -87,7 +90,9 @@ func (s *DashboardIntegrationTestSuite) TestGetSections_MissingLibraryID() {
 	client := &http.Client{}
 	resp, err := client.Do(req)
 	require.NoError(s.T(), err)
-	defer resp.Body.Close()
+	defer func(Body io.ReadCloser) {
+		_ = Body.Close()
+	}(resp.Body)
 
 	assert.Equal(s.T(), http.StatusBadRequest, resp.StatusCode)
 }
@@ -101,7 +106,9 @@ func (s *DashboardIntegrationTestSuite) TestGetSections_InvalidLibraryID() {
 	client := &http.Client{}
 	resp, err := client.Do(req)
 	require.NoError(s.T(), err)
-	defer resp.Body.Close()
+	defer func(Body io.ReadCloser) {
+		_ = Body.Close()
+	}(resp.Body)
 
 	assert.Equal(s.T(), http.StatusBadRequest, resp.StatusCode)
 }
@@ -112,7 +119,9 @@ func (s *DashboardIntegrationTestSuite) TestGetSections_Unauthorized() {
 	client := &http.Client{}
 	resp, err := client.Do(req)
 	require.NoError(s.T(), err)
-	defer resp.Body.Close()
+	defer func(Body io.ReadCloser) {
+		_ = Body.Close()
+	}(resp.Body)
 
 	assert.Equal(s.T(), http.StatusUnauthorized, resp.StatusCode)
 }
@@ -136,7 +145,9 @@ func (s *DashboardIntegrationTestSuite) TestUpdatePreferences_Success() {
 	client := &http.Client{}
 	resp, err := client.Do(req)
 	require.NoError(s.T(), err)
-	defer resp.Body.Close()
+	defer func(Body io.ReadCloser) {
+		_ = Body.Close()
+	}(resp.Body)
 
 	assert.Equal(s.T(), http.StatusOK, resp.StatusCode)
 
@@ -164,7 +175,9 @@ func (s *DashboardIntegrationTestSuite) TestUpdatePreferences_Unauthorized() {
 	client := &http.Client{}
 	resp, err := client.Do(req)
 	require.NoError(s.T(), err)
-	defer resp.Body.Close()
+	defer func(Body io.ReadCloser) {
+		_ = Body.Close()
+	}(resp.Body)
 
 	assert.Equal(s.T(), http.StatusUnauthorized, resp.StatusCode)
 }
@@ -184,7 +197,9 @@ func (s *DashboardIntegrationTestSuite) TestRestoreSystemCollection_InvalidName(
 	client := &http.Client{}
 	resp, err := client.Do(req)
 	require.NoError(s.T(), err)
-	defer resp.Body.Close()
+	defer func(Body io.ReadCloser) {
+		_ = Body.Close()
+	}(resp.Body)
 
 	assert.Equal(s.T(), http.StatusBadRequest, resp.StatusCode)
 }
@@ -201,7 +216,9 @@ func (s *DashboardIntegrationTestSuite) TestRestoreSystemCollection_Unauthorized
 	client := &http.Client{}
 	resp, err := client.Do(req)
 	require.NoError(s.T(), err)
-	defer resp.Body.Close()
+	defer func(Body io.ReadCloser) {
+		_ = Body.Close()
+	}(resp.Body)
 
 	assert.Equal(s.T(), http.StatusUnauthorized, resp.StatusCode)
 }
@@ -224,14 +241,16 @@ func (s *DashboardIntegrationTestSuite) TestRestoreSystemCollection_ValidNames()
 
 			client := &http.Client{}
 			resp, err := client.Do(req)
-			require.NoError(t, err)
-			defer resp.Body.Close()
+			require.NoError(s.T(), err)
+			defer func(Body io.ReadCloser) {
+				_ = Body.Close()
+			}(resp.Body)
 
 			assert.Equal(t, http.StatusOK, resp.StatusCode)
 
 			var response map[string]interface{}
 			err = json.NewDecoder(resp.Body).Decode(&response)
-			require.NoError(t, err)
+			require.NoError(s.T(), err)
 
 			assert.Contains(t, response, "message")
 		})