feat(blossom): blob-manager per-file controls + clear 402 on upload

- Blob manager rows now show an image thumbnail (image/* blobs) and Copy-link /
  Open controls, alongside the existing mirror-to-missing / delete / report.
- BUD-07: BlossomUploader now raises a typed BlossomPaymentException on a 402, and
  UploadOrchestrator surfaces a specific "server requires payment" message instead
  of a generic upload failure (auto-settlement via the NIP-60 wallet is still TBD).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Ckbnz1N94W1hnNC9xpsCNP

amethyst/src/main/java/com/vitorpamplona/amethyst/service/uploads/UploadOrchestrator.kt

@@ -25,6 +25,7 @@ import android.net.Uri
 import com.vitorpamplona.amethyst.Amethyst
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.commons.service.upload.BlossomClient
+import com.vitorpamplona.amethyst.commons.service.upload.BlossomPaymentException
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.service.uploads.UploadingState.UploadingFinalState
 import com.vitorpamplona.amethyst.service.uploads.blossom.BlossomUploader
@@ -246,6 +247,9 @@ class UploadOrchestrator {
             finalState
         } catch (_: SignerExceptions.ReadOnlyException) {
             error(R.string.login_with_a_private_key_to_be_able_to_upload)
+        } catch (e: BlossomPaymentException) {
+            // BUD-07: the server wants payment before it will store the blob.
+            error(R.string.blossom_payment_required, e.payment.reason ?: serverBaseUrl)
         } catch (e: Exception) {
             if (e is CancellationException) throw e
             error(R.string.failed_to_upload_media, e.message ?: e.javaClass.simpleName)

amethyst/src/main/java/com/vitorpamplona/amethyst/service/uploads/blossom/BlossomUploader.kt

@@ -26,6 +26,7 @@ import android.net.Uri
 import android.provider.OpenableColumns
 import android.webkit.MimeTypeMap
 import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.commons.service.upload.BlossomPaymentException
 import com.vitorpamplona.amethyst.service.HttpStatusMessages
 import com.vitorpamplona.amethyst.service.checkNotInMainThread
 import com.vitorpamplona.amethyst.service.uploads.MediaUploadResult
@@ -36,6 +37,7 @@ import com.vitorpamplona.quartz.nip01Core.core.HexKey
 import com.vitorpamplona.quartz.nip01Core.core.JsonMapper
 import com.vitorpamplona.quartz.nip01Core.core.toHexKey
 import com.vitorpamplona.quartz.nipB7Blossom.BlossomAuthorizationEvent
+import com.vitorpamplona.quartz.nipB7Blossom.BlossomPaymentRequired
 import com.vitorpamplona.quartz.nipB7Blossom.BlossomServerUrl
 import com.vitorpamplona.quartz.nipB7Blossom.BlossomUploadResult
 import com.vitorpamplona.quartz.utils.RandomInstance
@@ -204,6 +206,10 @@ class BlossomUploader {
                     response.body.use { body ->
                         convertToMediaResult(parseResults(body.string()))
                     }
+                } else if (response.code == 402) {
+                    // BUD-07: paid server. Surface the payment challenge so the caller can
+                    // tell the user (auto-settlement via the NIP-60 wallet is a follow-up).
+                    throw BlossomPaymentException(serverBaseUrl, BlossomPaymentRequired.fromHeaders { response.headers[it] })
                 } else {
                     val errorMessage = response.headers.get(BlossomServerUrl.REASON_HEADER)
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/actions/mediaServers/BlossomBlobManagerScreen.kt

@@ -20,6 +20,7 @@
  */
 package com.vitorpamplona.amethyst.ui.actions.mediaServers
 
+import android.content.Intent
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.ExperimentalLayoutApi
@@ -31,6 +32,7 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.AssistChip
 import androidx.compose.material3.AssistChipDefaults
@@ -54,10 +56,17 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.platform.LocalClipboardManager
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
+import androidx.core.net.toUri
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
+import coil3.compose.AsyncImage
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.commons.icons.symbols.Icon
 import com.vitorpamplona.amethyst.commons.icons.symbols.MaterialSymbols
@@ -152,23 +161,40 @@ private fun BlobCard(
 ) {
     var deleteMenuOpen by remember { mutableStateOf(false) }
     var reportOpen by remember { mutableStateOf(false) }
+    val clipboard = LocalClipboardManager.current
+    val context = LocalContext.current
 
     Card(modifier = Modifier.fillMaxWidth()) {
         Column(
             modifier = Modifier.fillMaxWidth().padding(12.dp),
             verticalArrangement = Arrangement.spacedBy(6.dp),
         ) {
-            Text(
-                text = row.hash.take(16) + "…",
-                style = MaterialTheme.typography.titleSmall,
-                overflow = TextOverflow.Ellipsis,
-                maxLines = 1,
-            )
-            Text(
-                text = listOfNotNull(row.type, row.size?.let { humanBytes(it) }).joinToString(" · "),
-                style = MaterialTheme.typography.bodySmall,
-                color = MaterialTheme.colorScheme.grayText,
-            )
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                horizontalArrangement = Arrangement.spacedBy(10.dp),
+            ) {
+                if (row.url != null && row.type?.startsWith("image/") == true) {
+                    AsyncImage(
+                        model = row.url,
+                        contentDescription = null,
+                        contentScale = ContentScale.Crop,
+                        modifier = Modifier.size(44.dp).clip(RoundedCornerShape(8.dp)),
+                    )
+                }
+                Column(modifier = Modifier.weight(1f)) {
+                    Text(
+                        text = row.hash.take(16) + "…",
+                        style = MaterialTheme.typography.titleSmall,
+                        overflow = TextOverflow.Ellipsis,
+                        maxLines = 1,
+                    )
+                    Text(
+                        text = listOfNotNull(row.type, row.size?.let { humanBytes(it) }).joinToString(" · "),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.grayText,
+                    )
+                }
+            }
 
             FlowRow(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
                 row.serversPresent.forEach { server ->
@@ -228,6 +254,19 @@ private fun BlobCard(
                     }
                 }
             }
+
+            if (row.url != null) {
+                Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
+                    TextButton(onClick = { clipboard.setText(AnnotatedString(row.url)) }) {
+                        Text(stringRes(R.string.copy), style = MaterialTheme.typography.labelMedium)
+                    }
+                    TextButton(onClick = {
+                        runCatching { context.startActivity(Intent(Intent.ACTION_VIEW, row.url.toUri())) }
+                    }) {
+                        Text(stringRes(R.string.blossom_open), style = MaterialTheme.typography.labelMedium)
+                    }
+                }
+            }
         }
     }
 

amethyst/src/main/res/values/strings.xml

@@ -1555,6 +1555,8 @@
     <string name="blossom_mirror_to_missing">Mirror to missing</string>
     <string name="blossom_delete_from">Delete from…</string>
     <string name="blossom_report">Report</string>
+    <string name="blossom_open">Open</string>
+    <string name="blossom_payment_required">This server requires payment to upload: %1$s</string>
     <string name="blossom_report_title">Report blob</string>
     <string name="blossom_report_comment_hint">Reason (optional)</string>
     <string name="blossom_send">Send</string>