feat(recipe): edit button on the top bar, with overwrite-or-save-as on save

src/components/TopBar.tsx

@@ -1,7 +1,7 @@
 import React, { useState } from 'react';
-import { View, Text, TouchableOpacity, TextInput, Modal, KeyboardAvoidingView, Platform } from 'react-native';
+import { View, Text, TouchableOpacity, TextInput, Modal, KeyboardAvoidingView, Platform, Alert } from 'react-native';
 import { useSafeAreaInsets } from 'react-native-safe-area-context';
-import { Plus } from 'lucide-react-native';
+import { Plus, Pencil } from 'lucide-react-native';
 import * as Haptics from 'expo-haptics';
 
 interface TopBarProps {
@@ -16,6 +16,8 @@ export default function TopBar({ mode, recipeName, onSaveRecipe, onOverwriteReci
   const insets = useSafeAreaInsets();
   const [modalVisible, setModalVisible] = useState(false);
   const [newRecipeName, setNewRecipeName] = useState('');
+  const [editVisible, setEditVisible] = useState(false);
+  const [editName, setEditName] = useState('');
 
   const openModal = () => {
     // Bundled recipes are read-only -> Save As only, blank name. Custom ones
@@ -36,6 +38,35 @@ export default function TopBar({ mode, recipeName, onSaveRecipe, onOverwriteReci
   const handleSavePress = () => run(onSaveRecipe);
   const handleOverwritePress = () => onOverwriteRecipe && run(onOverwriteRecipe);
 
+  const openEdit = () => {
+    setEditName(recipeName);
+    setEditVisible(true);
+  };
+
+  // Edit keeps the name as the switch: same name = overwrite this recipe, a new
+  // name = keep the original and store the edit as a separate recipe. Both ask
+  // for confirmation first.
+  const handleEditSave = () => {
+    const name = editName.trim();
+    if (!name || !onOverwriteRecipe) return;
+    const unchanged = name === recipeName.trim();
+    setEditVisible(false);
+    Haptics.impactAsync(Haptics.ImpactFeedbackStyle.Light);
+    Alert.alert(
+      unchanged ? 'Overwrite recipe?' : 'Save as new recipe?',
+      unchanged
+        ? `Replace "${recipeName}" with the current settings?`
+        : `Keep "${recipeName}" and save these settings as "${name}"?`,
+      [
+        { text: 'CANCEL', style: 'cancel' },
+        {
+          text: unchanged ? 'OVERWRITE' : 'SAVE',
+          onPress: () => (unchanged ? onOverwriteRecipe(name) : onSaveRecipe(name)),
+        },
+      ],
+    );
+  };
+
   return (
     <>
       <View
@@ -54,16 +85,27 @@ export default function TopBar({ mode, recipeName, onSaveRecipe, onOverwriteReci
           </Text>
         </View>
 
-        <TouchableOpacity
-          onPress={openModal}
-          className="flex-row items-center rounded-full border border-zinc-700/80 bg-black/45 px-4 py-2.5"
-          activeOpacity={0.7}
-        >
-          <Plus size={14} color="#f59e0b" />
-          <Text className="ml-1 font-mono text-xs font-bold tracking-widest text-amber-500">
-            SAVE
-          </Text>
-        </TouchableOpacity>
+        <View className="flex-row items-center space-x-2">
+          {onOverwriteRecipe && (
+            <TouchableOpacity
+              onPress={openEdit}
+              className="rounded-full border border-zinc-700/80 bg-black/45 p-2.5"
+              activeOpacity={0.7}
+            >
+              <Pencil size={13} color="#f59e0b" />
+            </TouchableOpacity>
+          )}
+          <TouchableOpacity
+            onPress={openModal}
+            className="flex-row items-center rounded-full border border-zinc-700/80 bg-black/45 px-4 py-2.5"
+            activeOpacity={0.7}
+          >
+            <Plus size={14} color="#f59e0b" />
+            <Text className="ml-1 font-mono text-xs font-bold tracking-widest text-amber-500">
+              SAVE
+            </Text>
+          </TouchableOpacity>
+        </View>
       </View>
 
       <Modal
@@ -124,6 +166,51 @@ export default function TopBar({ mode, recipeName, onSaveRecipe, onOverwriteReci
           </View>
         </KeyboardAvoidingView>
       </Modal>
+
+      <Modal
+        transparent
+        animationType="slide"
+        visible={editVisible}
+        onRequestClose={() => setEditVisible(false)}
+      >
+        <View className="absolute inset-0 bg-black/60" />
+        <KeyboardAvoidingView
+          style={{ flex: 1 }}
+          behavior={Platform.OS === 'ios' ? 'padding' : 'height'}
+        >
+          <View style={{ paddingBottom: insets.bottom + 16 }} className="mt-auto bg-titan border-t border-zinc-800 rounded-t-3xl p-6">
+            <Text className="text-white font-mono text-sm font-bold tracking-wider mb-4">
+              EDIT RECIPE
+            </Text>
+            <TextInput
+              value={editName}
+              onChangeText={setEditName}
+              placeholder="Recipe name"
+              placeholderTextColor="#71717a"
+              className="bg-carbon border border-zinc-800 rounded-lg p-3 text-white font-mono text-sm mb-2"
+              autoFocus
+              onSubmitEditing={handleEditSave}
+            />
+            <Text className="text-zinc-500 font-mono text-[10px] mb-4">
+              New name saves a copy · same name overwrites
+            </Text>
+            <View className="flex-row space-x-3">
+              <TouchableOpacity
+                onPress={() => setEditVisible(false)}
+                className="flex-1 bg-zinc-800 py-3 rounded-lg items-center"
+              >
+                <Text className="text-zinc-300 font-mono text-xs font-semibold">CANCEL</Text>
+              </TouchableOpacity>
+              <TouchableOpacity
+                onPress={handleEditSave}
+                className="flex-1 bg-amber-500 py-3 rounded-lg items-center"
+              >
+                <Text className="text-black font-mono text-xs font-bold">SAVE</Text>
+              </TouchableOpacity>
+            </View>
+          </View>
+        </KeyboardAvoidingView>
+      </Modal>
     </>
   );
 }