Extensions methods and properties now are correctly isolated, respect visibility rules and allow adding class properties and class vals.

lyng-idea/src/main/kotlin/net/sergeych/lyng/idea/annotators/LyngExternalAnnotator.kt

@@ -157,8 +157,12 @@ class LyngExternalAnnotator : ExternalAnnotator<LyngExternalAnnotator.Input, Lyn
                 is MiniFunDecl -> {
                     addTypeSegments(d.returnType)
                     d.params.forEach { addTypeSegments(it.type) }
+                    addTypeSegments(d.receiver)
+                }
+                is MiniValDecl -> {
+                    addTypeSegments(d.type)
+                    addTypeSegments(d.receiver)
                 }
-                is MiniValDecl -> addTypeSegments(d.type)
                 is MiniClassDecl -> {
                     d.ctorFields.forEach { addTypeSegments(it.type) }
                     d.classFields.forEach { addTypeSegments(it.type) }

lyng-idea/src/main/kotlin/net/sergeych/lyng/idea/completion/LyngCompletionContributor.kt

@@ -184,7 +184,7 @@ class LyngCompletionContributor : CompletionContributor() {
                         ?: guessReturnClassAcrossKnownCallees(text, memberDotPos, imported)
                         ?: guessReceiverClass(text, memberDotPos, imported)
                 if (!inferredClass.isNullOrBlank()) {
-                    val ext = BuiltinDocRegistry.extensionMethodNamesFor(inferredClass)
+                    val ext = BuiltinDocRegistry.extensionMemberNamesFor(inferredClass)
                     if (DEBUG_COMPLETION) log.info("[LYNG_DEBUG] Post-engine extension check for $inferredClass: ${'$'}{ext}")
                     for (name in ext) {
                         if (existing.contains(name)) continue
@@ -494,10 +494,10 @@ class LyngCompletionContributor : CompletionContributor() {
                 }
             }
 
-            // Supplement with stdlib extension-like methods defined in root.lyng (e.g., fun String.trim(...))
+            // Supplement with stdlib extension members defined in root.lyng (e.g., fun String.trim(...))
             run {
                 val already = (directMap.keys + inheritedMap.keys).toMutableSet()
-                val ext = BuiltinDocRegistry.extensionMethodNamesFor(className)
+                val ext = BuiltinDocRegistry.extensionMemberNamesFor(className)
                 if (DEBUG_COMPLETION) log.info("[LYNG_DEBUG] Extensions for $className: count=${ext.size} -> ${ext}")
                 for (name in ext) {
                     if (already.contains(name)) continue