feat: add SettingsView with API key, shortcut, mode, and latency

MyVoxtral/MyVoxtral/Views/SettingsView.swift

@@ -0,0 +1,68 @@
+import SwiftUI
+
+struct SettingsView: View {
+    @ObservedObject var settings = AppSettings.shared
+    @State private var isRecordingShortcut = false
+
+    var body: some View {
+        Form {
+            Section("API") {
+                SecureField("Mistral API Key", text: $settings.apiKey)
+            }
+
+            Section("Output") {
+                Picker("Mode", selection: $settings.outputMode) {
+                    ForEach(OutputMode.allCases, id: \.self) { mode in
+                        Text(mode.rawValue).tag(mode)
+                    }
+                }
+                .pickerStyle(.segmented)
+
+                if settings.outputMode == .cursorInjection && !CursorInjector.isAccessibilityGranted {
+                    HStack {
+                        Image(systemName: "exclamationmark.triangle.fill")
+                            .foregroundStyle(.yellow)
+                        Text("Accessibility permission required")
+                            .font(.caption)
+                        Button("Grant") {
+                            CursorInjector.promptAccessibilityPermission()
+                        }
+                        .font(.caption)
+                    }
+                }
+            }
+
+            Section("Shortcut") {
+                HStack {
+                    Text("Toggle Recording:")
+                    Spacer()
+                    Button(isRecordingShortcut ? "Press keys..." : settings.shortcutDisplayString) {
+                        isRecordingShortcut = true
+                    }
+                }
+            }
+
+            Section("Latency") {
+                VStack(alignment: .leading) {
+                    Text("Streaming delay: \(settings.streamingDelayMs)ms")
+                        .font(.caption)
+                    Slider(
+                        value: Binding(
+                            get: { Double(settings.streamingDelayMs) },
+                            set: { settings.streamingDelayMs = Int($0) }
+                        ),
+                        in: 240...2400,
+                        step: 120
+                    )
+                    HStack {
+                        Text("Fast").font(.caption2).foregroundStyle(.secondary)
+                        Spacer()
+                        Text("Accurate").font(.caption2).foregroundStyle(.secondary)
+                    }
+                }
+            }
+        }
+        .formStyle(.grouped)
+        .frame(width: 360, height: 340)
+    }
+}