feat(core,app,android,ios): rename a share

ShareStore::rename changes only the name; the id that the catalog, watch
state and offline files are keyed by stays the same. Sync carries the
change as it does any other change to the share's register. The desktop
renames in the share's row. The phones rename from the share's menu.
Before, the name given at add time was permanent short of removing the
share.

android/app/src/main/java/io/narl/protonstream/ui/AppViewModel.kt

@@ -423,6 +423,15 @@ class AppViewModel(context: Context, private val workManager: WorkManager) : Vie
         }
     }
 
+    /** Call a share something else. The library, history and downloads stay. */
+    fun renameShare(id: String, name: String) {
+        viewModelScope.launch {
+            runCatching { withContext(Dispatchers.IO) { NativeRuntime.engine().renameShare(id, name) } }
+                .onFailure(::reportError)
+            reload()
+        }
+    }
+
     fun removeShare(id: String) {
         viewModelScope.launch {
             runCatching {

android/app/src/main/java/io/narl/protonstream/ui/ProtonStreamApp.kt

@@ -310,6 +310,7 @@ fun ProtonStreamApp(
                             addFolder = model::addAccountFolder,
                             onError = model::reportError,
                         ),
+                        onRename = model::renameShare,
                     )
                     Destination.History -> HistoryScreen(
                         state,

android/app/src/main/java/io/narl/protonstream/ui/SharesScreen.kt

@@ -40,6 +40,7 @@ import androidx.compose.ui.unit.dp
 import io.narl.protonstream.ui.theme.AccentButton
 import io.narl.protonstream.ui.theme.DangerButton
 import io.narl.protonstream.ui.theme.TonalButton
+import androidx.compose.material.icons.filled.Edit
 import uniffi.pstr_android.AccountState
 import uniffi.pstr_android.ShareRecord
 import androidx.compose.foundation.layout.Box
@@ -70,8 +71,10 @@ internal fun SharesScreen(
     padding: PaddingValues,
     account: AccountUiState = AccountUiState(),
     accountActions: AccountActions? = null,
+    onRename: (String, String) -> Unit = { _, _ -> },
 ) {
     var showAdd by remember { mutableStateOf(false) }
+    var renaming by remember { mutableStateOf<ShareRecord?>(null) }
     var signingIn by remember { mutableStateOf(false) }
     var browsing by remember { mutableStateOf(false) }
     var repairing by remember { mutableStateOf<ShareRecord?>(null) }
@@ -108,6 +111,7 @@ internal fun SharesScreen(
                             onRefresh = { onRefresh(share.id) },
                             onRepair = { repairing = share },
                             onRemove = { removing = share },
+                            onRename = { renaming = share },
                         )
                     }
                 }
@@ -146,6 +150,21 @@ internal fun SharesScreen(
             onRepair = { url, password -> onRepair(share.id, url, password) },
         )
     }
+    renaming?.let { share ->
+        var name by remember(share.id) { mutableStateOf(share.name) }
+        AlertDialog(
+            onDismissRequest = { renaming = null },
+            title = { Text("Rename ${share.name}") },
+            text = { OutlinedTextField(name, { name = it }, label = { Text("Name") }, singleLine = true) },
+            confirmButton = {
+                AccentButton(enabled = name.isNotBlank(), onClick = {
+                    renaming = null
+                    onRename(share.id, name.trim())
+                }) { Text("Save") }
+            },
+            dismissButton = { TonalButton(onClick = { renaming = null }) { Text("Cancel") } },
+        )
+    }
     removing?.let { share ->
         // Asked, because it cannot be undone: the link's secret and its
         // offline files go. Watch positions stay (`Catalog::remove_share`).
@@ -197,6 +216,7 @@ private fun ShareRow(
     onRefresh: () -> Unit,
     onRepair: () -> Unit,
     onRemove: () -> Unit,
+    onRename: () -> Unit = {},
 ) {
     var menu by remember { mutableStateOf(false) }
     ListItem(
@@ -244,6 +264,11 @@ private fun ShareRow(
                         leadingIcon = { Icon(Icons.Default.Refresh, contentDescription = null) },
                         onClick = { menu = false; onRefresh() },
                     )
+                    DropdownMenuItem(
+                        text = { Text("Rename") },
+                        leadingIcon = { Icon(Icons.Default.Edit, contentDescription = null) },
+                        onClick = { menu = false; onRename() },
+                    )
                     // Not a remove: a share whose secret has become unreadable
                     // cannot be removed either, since removal deletes a secret
                     // the store can no longer touch.