iOS: configurable voice wake words

apps/ios/Sources/Settings/VoiceWakeWordsSettingsView.swift

@@ -0,0 +1,69 @@
+import SwiftUI
+
+struct VoiceWakeWordsSettingsView: View {
+    @State private var triggerWords: [String] = []
+
+    var body: some View {
+        Form {
+            Section {
+                ForEach(self.triggerWords.indices, id: \.self) { index in
+                    TextField("Wake word", text: self.binding(for: index))
+                        .textInputAutocapitalization(.never)
+                        .autocorrectionDisabled()
+                }
+                .onDelete(perform: self.removeWords)
+
+                Button {
+                    self.addWord()
+                } label: {
+                    Label("Add word", systemImage: "plus")
+                }
+                .disabled(self.triggerWords
+                    .contains(where: { $0.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty }))
+
+                Button("Reset defaults") {
+                    self.triggerWords = VoiceWakePreferences.defaultTriggerWords
+                }
+            } header: {
+                Text("Wake Words")
+            } footer: {
+                Text(
+                    "Clawdis reacts when any trigger appears in a transcription. "
+                        + "Keep them short to avoid false positives.")
+            }
+        }
+        .navigationTitle("Wake Words")
+        .toolbar { EditButton() }
+        .task {
+            if self.triggerWords.isEmpty {
+                self.triggerWords = VoiceWakePreferences.loadTriggerWords()
+            }
+        }
+        .onChange(of: self.triggerWords) { _, newValue in
+            VoiceWakePreferences.saveTriggerWords(newValue)
+        }
+    }
+
+    private func addWord() {
+        self.triggerWords.append("")
+    }
+
+    private func removeWords(at offsets: IndexSet) {
+        self.triggerWords.remove(atOffsets: offsets)
+        if self.triggerWords.isEmpty {
+            self.triggerWords = VoiceWakePreferences.defaultTriggerWords
+        }
+    }
+
+    private func binding(for index: Int) -> Binding<String> {
+        Binding(
+            get: {
+                guard self.triggerWords.indices.contains(index) else { return "" }
+                return self.triggerWords[index]
+            },
+            set: { newValue in
+                guard self.triggerWords.indices.contains(index) else { return }
+                self.triggerWords[index] = newValue
+            })
+    }
+}