Replace notebook long-press with overflow menu (rename/delete)

- Three-dot overflow button on each notebook card
- Dropdown menu with Rename and Delete options
- Rename dialog with title field (keyboard defaults to Title Case)
- Removed combinedClickable — tap opens notebook, menu for actions

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/main/kotlin/net/metacircular/engpad/ui/notebooks/NotebookListScreen.kt

@@ -1,7 +1,6 @@
 package net.metacircular.engpad.ui.notebooks
 
-import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.clickable
-import androidx.compose.foundation.combinedClickable
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -69,6 +68,7 @@ fun NotebookListScreen(
     val notebooks by viewModel.notebooks.collectAsState()
     var showCreateDialog by remember { mutableStateOf(false) }
     var notebookToDelete by remember { mutableStateOf<Notebook?>(null) }
+    var notebookToRename by remember { mutableStateOf<Notebook?>(null) }
 
     var filterText by remember { mutableStateOf("") }
     var sortField by remember { mutableStateOf(SortField.LAST_EDITED) }
@@ -169,7 +169,8 @@ fun NotebookListScreen(
                         NotebookItem(
                             notebook = notebook,
                             onClick = { onNotebookClick(notebook.id) },
-                            onLongClick = { notebookToDelete = notebook },
+                            onRename = { notebookToRename = notebook },
+                            onDelete = { notebookToDelete = notebook },
                         )
                     }
                 }
@@ -197,27 +198,40 @@ fun NotebookListScreen(
             },
         )
     }
+
+    notebookToRename?.let { notebook ->
+        RenameNotebookDialog(
+            notebook = notebook,
+            onDismiss = { notebookToRename = null },
+            onRename = { newTitle ->
+                viewModel.renameNotebook(notebook.id, newTitle)
+                notebookToRename = null
+            },
+        )
+    }
 }
 
-@OptIn(ExperimentalFoundationApi::class)
 @Composable
 private fun NotebookItem(
     notebook: Notebook,
     onClick: () -> Unit,
-    onLongClick: () -> Unit,
+    onRename: () -> Unit,
+    onDelete: () -> Unit,
 ) {
     val dateFormat = remember { SimpleDateFormat("yyyy-MM-dd HH:mm", Locale.US) }
+    var showMenu by remember { mutableStateOf(false) }
 
     Card(
         modifier = Modifier
             .fillMaxWidth()
             .padding(horizontal = 16.dp, vertical = 4.dp)
-            .combinedClickable(
+            .clickable(onClick = onClick),
-                onClick = onClick,
-                onLongClick = onLongClick,
-            ),
     ) {
-        Column(modifier = Modifier.padding(16.dp)) {
+        Row(
+            modifier = Modifier.padding(start = 16.dp, top = 16.dp, bottom = 16.dp, end = 4.dp),
+            verticalAlignment = Alignment.CenterVertically,
+        ) {
+            Column(modifier = Modifier.weight(1f)) {
                 Text(
                     text = notebook.title,
                     style = MaterialTheme.typography.titleMedium,
@@ -236,6 +250,25 @@ private fun NotebookItem(
                     )
                 }
             }
+            Box {
+                androidx.compose.material3.IconButton(onClick = { showMenu = true }) {
+                    Text("\u22EE", style = MaterialTheme.typography.bodyLarge)
+                }
+                DropdownMenu(
+                    expanded = showMenu,
+                    onDismissRequest = { showMenu = false },
+                ) {
+                    DropdownMenuItem(
+                        text = { Text("Rename") },
+                        onClick = { showMenu = false; onRename() },
+                    )
+                    DropdownMenuItem(
+                        text = { Text("Delete") },
+                        onClick = { showMenu = false; onDelete() },
+                    )
+                }
+            }
+        }
     }
 }
 
@@ -312,14 +345,44 @@ private fun DeleteNotebookDialog(
         title = { Text("Delete Notebook") },
         text = { Text("Delete \"${notebook.title}\"? This cannot be undone.") },
         confirmButton = {
-            TextButton(onClick = onConfirm) {
+            TextButton(onClick = onConfirm) { Text("Delete") }
-                Text("Delete")
-            }
         },
         dismissButton = {
-            TextButton(onClick = onDismiss) {
+            TextButton(onClick = onDismiss) { Text("Cancel") }
-                Text("Cancel")
+        },
-            }
+    )
+}
+
+@Composable
+private fun RenameNotebookDialog(
+    notebook: Notebook,
+    onDismiss: () -> Unit,
+    onRename: (String) -> Unit,
+) {
+    var title by remember { mutableStateOf(notebook.title) }
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text("Rename Notebook") },
+        text = {
+            OutlinedTextField(
+                value = title,
+                onValueChange = { title = it },
+                label = { Text("Title") },
+                singleLine = true,
+                keyboardOptions = KeyboardOptions(
+                    capitalization = KeyboardCapitalization.Words,
+                ),
+                modifier = Modifier.fillMaxWidth(),
+            )
+        },
+        confirmButton = {
+            TextButton(
+                onClick = { onRename(title.ifBlank { notebook.title }) },
+            ) { Text("Rename") }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismiss) { Text("Cancel") }
         },
     )
 }

app/src/main/kotlin/net/metacircular/engpad/ui/notebooks/NotebookListViewModel.kt

@@ -29,6 +29,12 @@ class NotebookListViewModel(
         }
     }
 
+    fun renameNotebook(id: Long, title: String) {
+        viewModelScope.launch {
+            repository.updateTitle(id, title)
+        }
+    }
+
     class Factory(private val repository: NotebookRepository) : ViewModelProvider.Factory {
         @Suppress("UNCHECKED_CAST")
         override fun <T : ViewModel> create(modelClass: Class<T>): T {