fix: Ignore ?inline suffix for imported stylesheets (#16039) (#16040)

Frontend resources checking ignores ?inline suffixes in the stylesheet path when comparing file names.

(cherry picked from commit b9da117)

Co-authored-by: Mikhail Shabarov <61410877+mshabarov@users.noreply.github.com>

Author: vaadin-bot

flow-server/src/main/java/com/vaadin/flow/server/frontend/TaskRunDevBundleBuild.java

@@ -296,6 +296,10 @@ private static boolean frontendImportsFound(JsonObject statsJson,
                 .filter(line -> line.startsWith("import"))
                 .map(line -> line.substring(line.indexOf('\'') + 1,
                         line.lastIndexOf('\'')))
+                .map(importString -> importString.contains("?")
+                        ? importString.substring(0,
+                                importString.lastIndexOf("?"))
+                        : importString)
                 .collect(Collectors.toList());
         JsonArray statsBundle = statsJson.hasKey("bundleImports")
                 ? statsJson.getArray("bundleImports")

flow-server/src/test/java/com/vaadin/flow/server/frontend/TaskRunDevBundleBuildTest.java

@@ -981,6 +981,38 @@ public void frontendFileHashMissmatch_bundleRebuild() throws IOException {
         }
     }
 
+    @Test
+    public void cssImportWithInline_statsAndImportsMatchAndNoBundleRebuild()
+            throws IOException {
+        createPackageJsonStub(BLANK_PACKAGE_JSON_WITH_HASH);
+
+        final FrontendDependenciesScanner depScanner = Mockito
+                .mock(FrontendDependenciesScanner.class);
+        Mockito.when(depScanner.getModules()).thenReturn(
+                Collections.singletonList("Frontend/my-styles.css?inline"));
+
+        JsonObject stats = getBasicStats();
+        stats.getArray(BUNDLE_IMPORTS).set(0, "Frontend/my-styles.css");
+
+        try (MockedStatic<FrontendUtils> utils = Mockito
+                .mockStatic(FrontendUtils.class)) {
+            utils.when(() -> FrontendUtils.getDevBundleFolder(Mockito.any()))
+                    .thenReturn(temporaryFolder.getRoot());
+            utils.when(
+                    () -> FrontendUtils.getJarResourceString("my-styles.css"))
+                    .thenReturn("body{color:yellow}");
+            utils.when(() -> FrontendUtils
+                    .findBundleStatsJson(temporaryFolder.getRoot()))
+                    .thenReturn(stats.toJson());
+
+            boolean needsBuild = TaskRunDevBundleBuild
+                    .needsBuildInternal(options, depScanner, finder);
+            Assert.assertFalse(
+                    "CSS 'inline' suffix should be ignored for imports checking",
+                    needsBuild);
+        }
+    }
+
     @Test
     public void reusedTheme_noReusedThemes_noBundleRebuild()
             throws IOException {