refactor: move rule editor actions into the navigation bar

- Both editor modes commit via a checkmark confirmation button
  (role: .confirm) in the navigation bar — accessibility labels
  'Add Rule' (create) and 'Done' (edit); replaces the bottom
  'Add Rule' button, so nothing floats over the form anymore
- Edit mode gains an ellipsis 'Rule Actions' menu next to the
  checkmark holding Disable/Enable Rule and destructive Delete Rule;
  the red form rows are removed
- Tests pin the checkmark to the navigation bar with its label and
  drive disable/delete through the menu; the swipe-to-reach
  workarounds are gone. 95 passing
- Spec §6 updated

Severed/Views/Rules/RuleEditorView.swift

@@ -6,9 +6,9 @@
 import SwiftUI
 
 /// The rule editor as a plain Form, always pushed inside a NavigationStack
-/// (New Rule flow and detail editing both push it). Creation commits with a
-/// prominent "Add Rule" button; editing uses a toolbar Done plus red
-/// Disable/Delete rows.
+/// (New Rule flow and detail editing both push it). Both modes commit via a
+/// checkmark confirmation button in the navigation bar; edit mode adds an
+/// ellipsis "Rule Actions" menu (Disable/Enable, Delete) next to it.
 struct RuleEditorView: View {
     enum Mode: Equatable {
         case create
@@ -27,20 +27,6 @@ struct RuleEditorView: View {
         Form {
             nameSection
             sections
-            if case .edit(let isEnabled) = mode {
-                Section {
-                    Button(isEnabled ? "Disable Rule" : "Enable Rule") {
-                        onToggleEnabled?()
-                    }
-                    .foregroundStyle(.red)
-                    .accessibilityIdentifier("toggleEnabledButton")
-
-                    Button("Delete Rule", role: .destructive) {
-                        onDelete?()
-                    }
-                    .accessibilityIdentifier("deleteRuleButton")
-                }
-            }
         }
         .navigationBarTitleDisplayMode(.inline)
         .toolbar {
@@ -50,32 +36,41 @@ struct RuleEditorView: View {
                     .lineLimit(1)
                     .accessibilityIdentifier("ruleEditorTitle")
             }
-            if case .edit = mode {
-                ToolbarItem(placement: .confirmationAction) {
-                    Button("Done") {
-                        onCommit(draft.sanitized())
+            if case .edit(let isEnabled) = mode {
+                ToolbarItem(placement: .topBarTrailing) {
+                    Menu {
+                        Button(isEnabled ? "Disable Rule" : "Enable Rule") {
+                            onToggleEnabled?()
+                        }
+                        Button("Delete Rule", role: .destructive) {
+                            onDelete?()
+                        }
+                    } label: {
+                        Image(systemName: "ellipsis")
                     }
-                    .accessibilityIdentifier("doneButton")
+                    .accessibilityLabel("Rule Actions")
+                    .accessibilityIdentifier("ruleActionsMenu")
                 }
             }
-        }
-        .safeAreaInset(edge: .bottom) {
-            if mode == .create {
-                Button {
-                    onCommit(draft.sanitized())
-                } label: {
-                    Text("Add Rule")
-                        .frame(maxWidth: .infinity)
+            ToolbarItem(placement: .confirmationAction) {
+                switch mode {
+                case .create:
+                    Button(role: .confirm) {
+                        onCommit(draft.sanitized())
+                    } label: {
+                        Image(systemName: "checkmark")
+                    }
+                    .accessibilityLabel("Add Rule")
+                    .accessibilityIdentifier("commitRuleButton")
+                case .edit:
+                    Button(role: .confirm) {
+                        onCommit(draft.sanitized())
+                    } label: {
+                        Image(systemName: "checkmark")
+                    }
+                    .accessibilityLabel("Done")
+                    .accessibilityIdentifier("doneButton")
                 }
-                .buttonStyle(.borderedProminent)
-                .controlSize(.large)
-                .accessibilityIdentifier("commitRuleButton")
-                .padding(.horizontal)
-                .padding(.vertical, 10)
-                .frame(maxWidth: .infinity)
-                // Bar material so scrolling form content doesn't collide
-                // with the floating button.
-                .background(.bar)
             }
         }
         .sheet(isPresented: $showingAppPicker) {