extract Nip05OrPubkeyLine into shared composable

Extract nip05 value calculation into helper

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/ui/components/Nip05OrPubkeyLine.kt

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2025 Vitor Pamplona
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+ * Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package com.vitorpamplona.amethyst.commons.ui.components
+
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.text.style.TextOverflow
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.vitorpamplona.amethyst.commons.model.User
+import com.vitorpamplona.amethyst.commons.model.nip05DnsIdentifiers.Nip05State
+
+/**
+ * Single-line bodySmall label for a user secondary identifier: shows the
+ * verified NIP-05 (formatted via [com.vitorpamplona.quartz.nip05DnsIdentifiers.Nip05Id.toDisplayValue])
+ * when present, otherwise a shortened pubkey.
+ */
+@Composable
+fun Nip05OrPubkeyLine(user: User) {
+    val nip05StateMetadata by user.nip05State().flow.collectAsStateWithLifecycle()
+
+    val text =
+        when (val state = nip05StateMetadata) {
+            is Nip05State.Exists -> state.nip05.toDisplayValue()
+            else -> user.pubkeyDisplayHex()
+        }
+
+    Text(
+        text = text,
+        style = MaterialTheme.typography.bodySmall,
+        color = MaterialTheme.colorScheme.onSurfaceVariant,
+        maxLines = 1,
+        overflow = TextOverflow.Ellipsis,
+    )
+}