refactor(commons): shared ClickableUrl/ClickableEmail; Desktop drops its duplicate

Desktop's ClickableLink and Amethyst's ClickableUrl were near-identical: the only
real differences are mouse-first styling (Desktop underlines + shows a hand
cursor) and the open mechanism. But LocalUriHandler.openUri opens the browser on
Android AND Desktop (and the mail client for mailto:), so the "open a link"
logic never needed to be platform-specific.

Add ClickableUrl/ClickableEmail to commons/ui/components on LocalUriHandler, with
an `underline` flag so each front end keeps its exact look. Desktop's rich-text
renderer now reuses them (underline = true) for url/email/link-preview/withdraw
and its bespoke ClickableLink is deleted. Amethyst keeps its own blossom-intent-
aware ClickableUrl (blossom never applies to plain links, so this path is
equivalent); Phone stays platform-specific (Android dials, Desktop has no dialer).

Verified: :commons JVM and :desktopApp compile.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LUiGxXMbjVmgspa1X15o1V

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

@@ -0,0 +1,93 @@
+/*
+ * 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.foundation.clickable
+import androidx.compose.material3.LocalTextStyle
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.input.pointer.PointerIcon
+import androidx.compose.ui.input.pointer.pointerHoverIcon
+import androidx.compose.ui.platform.LocalUriHandler
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.style.TextDecoration
+import androidx.compose.ui.text.style.TextOverflow
+
+/**
+ * A primary-colored, single-line clickable URL that opens via the platform
+ * [LocalUriHandler] — the browser on Android, `Desktop.browse` on JVM — so the
+ * "open a link" behavior is identical on every front end without a seam.
+ *
+ * [underline] + the hover cursor are mouse-first affordances: Desktop passes
+ * `true`; touch front ends leave it `false`. A scheme-less [url] is opened as
+ * `https://`.
+ */
+@Composable
+fun ClickableUrl(
+    url: String,
+    displayText: String = url,
+    modifier: Modifier = Modifier,
+    underline: Boolean = false,
+    style: TextStyle = LocalTextStyle.current,
+) {
+    val uriHandler = LocalUriHandler.current
+    Text(
+        text = displayText,
+        style = style,
+        color = MaterialTheme.colorScheme.primary,
+        textDecoration = if (underline) TextDecoration.Underline else null,
+        maxLines = 1,
+        overflow = TextOverflow.MiddleEllipsis,
+        modifier =
+            modifier.pointerHoverIcon(PointerIcon.Hand).clickable {
+                runCatching {
+                    uriHandler.openUri(if (url.contains("://")) url else "https://$url")
+                }
+            },
+    )
+}
+
+/**
+ * A primary-colored clickable email that opens the platform mail client via
+ * [LocalUriHandler] (`mailto:`). Strips a leading `mailto:` from the display text.
+ * [underline] + hover cursor are the Desktop mouse-first affordances.
+ */
+@Composable
+fun ClickableEmail(
+    address: String,
+    modifier: Modifier = Modifier,
+    underline: Boolean = false,
+) {
+    val uriHandler = LocalUriHandler.current
+    val display = remember(address) { address.removePrefix("mailto:") }
+    Text(
+        text = display,
+        color = MaterialTheme.colorScheme.primary,
+        textDecoration = if (underline) TextDecoration.Underline else null,
+        modifier =
+            modifier.pointerHoverIcon(PointerIcon.Hand).clickable {
+                runCatching { uriHandler.openUri("mailto:$display") }
+            },
+    )
+}

desktopApp/src/jvmMain/kotlin/com/vitorpamplona/amethyst/desktop/ui/note/DesktopRichText.kt

@@ -70,6 +70,8 @@ import com.vitorpamplona.amethyst.commons.richtext.RichTextViewerState
 import com.vitorpamplona.amethyst.commons.richtext.SecretEmoji
 import com.vitorpamplona.amethyst.commons.richtext.Segment
 import com.vitorpamplona.amethyst.commons.richtext.WithdrawSegment
+import com.vitorpamplona.amethyst.commons.ui.components.ClickableEmail
+import com.vitorpamplona.amethyst.commons.ui.components.ClickableUrl
 import com.vitorpamplona.amethyst.commons.ui.markdown.RenderMarkdown
 import com.vitorpamplona.amethyst.commons.ui.richtext.LocalRichTextInteractions
 import com.vitorpamplona.amethyst.commons.ui.richtext.LocalRichTextSegmentRenderer
@@ -204,7 +206,7 @@ class DesktopRichTextSegmentRenderer(
                     contentScale = ContentScale.Fit,
                 )
             is PdfSegment -> RenderPdfCard(segment.segmentText)
-            else -> ClickableLink(segment.segmentText, segment.segmentText)
+            else -> ClickableUrl(segment.segmentText, underline = true)
         }
     }
 
@@ -293,7 +295,7 @@ class DesktopRichTextSegmentRenderer(
         when (segment) {
             is InvoiceSegment -> RenderInvoiceCard(segment.segmentText, callbacks)
             is CashuSegment -> RenderCashuCard(segment.segmentText)
-            is WithdrawSegment -> ClickableLink(segment.segmentText, segment.segmentText)
+            is WithdrawSegment -> ClickableUrl(segment.segmentText, underline = true)
             else -> Text(segment.segmentText, style = MaterialTheme.typography.bodyMedium, color = MaterialTheme.colorScheme.onSurface)
         }
     }
@@ -302,35 +304,20 @@ class DesktopRichTextSegmentRenderer(
     override fun LinkPreview(
         url: String,
         modifier: Modifier,
-    ) = ClickableLink(url, url)
+    ) = ClickableUrl(url, underline = true)
 
     @Composable
     override fun Url(
         url: String,
         displayText: String,
         modifier: Modifier,
-    ) = ClickableLink(url, displayText)
+    ) = ClickableUrl(url, displayText, underline = true)
 
     @Composable
     override fun Email(
         address: String,
         modifier: Modifier,
-    ) = Text(
-        text = address,
-        style = MaterialTheme.typography.bodyMedium,
-        color = MaterialTheme.colorScheme.primary,
-        textDecoration = TextDecoration.Underline,
-        modifier =
-            Modifier
-                .pointerHoverIcon(PointerIcon.Hand)
-                .clickable {
-                    runCatching {
-                        java.awt.Desktop
-                            .getDesktop()
-                            .browse(URI("mailto:$address"))
-                    }
-                },
-    )
+    ) = ClickableEmail(address, underline = true)
 
     @Composable
     override fun Phone(
@@ -376,31 +363,6 @@ class DesktopRichTextSegmentRenderer(
     ) = RenderSecretEmoji(segment.segmentText)
 }
 
-@Composable
-private fun ClickableLink(
-    url: String,
-    displayText: String,
-) {
-    Text(
-        text = displayText,
-        style = MaterialTheme.typography.bodyMedium,
-        color = MaterialTheme.colorScheme.primary,
-        textDecoration = TextDecoration.Underline,
-        maxLines = 1,
-        overflow = TextOverflow.Ellipsis,
-        modifier =
-            Modifier
-                .pointerHoverIcon(PointerIcon.Hand)
-                .clickable {
-                    runCatching {
-                        java.awt.Desktop
-                            .getDesktop()
-                            .browse(URI(url))
-                    }
-                },
-    )
-}
-
 @Composable
 private fun RenderBechSegment(
     segment: BechSegment,