Removing more warnings

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/preview/UrlInfoItem.kt

@@ -21,7 +21,7 @@
 package com.vitorpamplona.amethyst.commons.preview
 
 import androidx.compose.runtime.Immutable
-import java.net.URL
+import java.net.URI
 
 @Immutable
 class UrlInfoItem(
@@ -31,10 +31,16 @@ class UrlInfoItem(
     val image: String = "",
     val mimeType: String,
 ) {
-    val verifiedUrl = runCatching { URL(url) }.getOrNull()
+    val verifiedUrl = runCatching { URI(url).toURL() }.getOrNull()
     val imageUrlFullPath =
         if (image.startsWith("/")) {
-            URL(verifiedUrl, image).toString()
+            runCatching {
+                verifiedUrl
+                    ?.toURI()
+                    ?.resolve(image)
+                    ?.toURL()
+                    ?.toString()
+            }.getOrNull() ?: image
         } else {
             image
         }

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/richtext/RichTextParser.kt

@@ -40,8 +40,8 @@ import kotlinx.collections.immutable.toImmutableList
 import kotlinx.collections.immutable.toImmutableMap
 import kotlinx.collections.immutable.toPersistentList
 import java.net.MalformedURLException
+import java.net.URI
 import java.net.URISyntaxException
-import java.net.URL
 import kotlin.coroutines.cancellation.CancellationException
 
 class RichTextParser {
@@ -424,12 +424,18 @@ class RichTextParser {
 
         fun isValidURL(url: String?): Boolean =
             try {
-                URL(url).toURI()
-                true
+                if (url != null) {
+                    URI(url).toURL()
+                    true
+                } else {
+                    false
+                }
             } catch (e: MalformedURLException) {
                 false
             } catch (e: URISyntaxException) {
                 false
+            } catch (e: IllegalArgumentException) {
+                false
             }
 
         fun parseImageOrVideo(fullUrl: String): BaseMediaContent {