add core view extension with JTE and Thymeleaf support

flash-extensions/flash-ext-openapi/src/main/java/dev/relism/ext/openapi/OpenApiBuilder.java

@@ -344,7 +344,11 @@ public final class OpenApiBuilder {
     }
 
     private static String normalizePath(String path) {
-        return path.startsWith("/") ? path : "/" + path;
+        String normalized = path.startsWith("/") ? path : "/" + path;
+        while (normalized.startsWith("//")) {
+            normalized = normalized.substring(1);
+        }
+        return normalized;
     }
 
     private static String defaultDescription(int status) {

flash-extensions/flash-ext-openapi/src/test/java/dev/relism/ext/openapi/OpenApiExtensionTest.java

@@ -108,6 +108,21 @@ class OpenApiExtensionTest {
         assertFalse(paths.containsKey("/users"));
     }
 
+    @Test
+    void normalizes_double_slash_paths_from_events() {
+        FlashContext ctx = new FlashContext();
+        OpenApiExtension ext = new OpenApiExtension();
+        ext.provide(ctx);
+
+        emitRoute(ctx, HttpMethod.GET, "//blogs", "/", ScopedUsersHandler.class);
+
+        OpenApiBuilder builder = ctx.require(OpenApiBuilder.class);
+        Map<String, Object> spec = builder.build();
+        Map<String, Object> paths = cast(spec.get("paths"));
+        assertTrue(paths.containsKey("/blogs"));
+        assertFalse(paths.containsKey("//blogs"));
+    }
+
     @SuppressWarnings("unchecked")
     private static List<RouteListener> listeners(FlashContext ctx) {
         try {