fix: no-op unknown removal, earlier-duplicate editor check, list focus for delete/undo

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Sources/Sst/DictionaryView.swift

@@ -21,6 +21,7 @@ struct DictionaryView: View {
     @State private var selection: UUID?
     @State private var editing: EditorTarget?
     @FocusState private var searchFocused: Bool
+    @FocusState private var listFocused: Bool
 
     var body: some View {
         VStack(spacing: Layout.panelGap) {
@@ -77,14 +78,25 @@ struct DictionaryView: View {
                     ForEach(list.visibleRows) { row in
                         DictionaryRow(row: row, isSelected: selection == row.id)
                             .onTapGesture(count: 2) { editing = .existing(row.id) }
-                            .onTapGesture { selection = row.id }
+                            .onTapGesture {
+                                selection = row.id
+                                listFocused = true
+                            }
                     }
                 }
             }
         }
         .focusable()
+        .focused($listFocused)
+        .focusEffectDisabled()
         .onDeleteCommand {
-            if let id = selection { list.remove(id: id) }
+            if let id = selection {
+                list.remove(id: id)
+                selection = nil
+            }
+        }
+        .onChange(of: list.rows) { _, rows in
+            if let s = selection, !rows.contains(where: { $0.id == s }) { selection = nil }
         }
         .onKeyPress(KeyEquivalent("z"), phases: .down) { press in
             guard press.modifiers == .command, list.canUndo else { return .ignored }

Sources/Sst/HistoryView.swift

@@ -10,6 +10,7 @@ struct HistoryView: View {
     @EnvironmentObject private var model: AppModel
     @ObservedObject var list: HistoryViewModel
     @FocusState private var searchFocused: Bool
+    @FocusState private var listFocused: Bool
 
     var body: some View {
         VStack(spacing: Layout.panelGap) {
@@ -47,6 +48,9 @@ struct HistoryView: View {
                 }
             }
             .focusable()
+            .focused($listFocused)
+            .focusEffectDisabled()
+            .onChange(of: list.selection) { _, _ in listFocused = true }
             .onDeleteCommand {
                 if let id = list.selection { list.delete(id: id) }
             }

Sources/SstData/ViewSupport.swift

@@ -134,7 +134,14 @@ public final class DictionaryViewModel: ObservableObject {
 
     /// Live feedback for the editor; `id` is the entry being edited (nil for a new one).
     public func warnings(for kind: DictionaryEntry.Kind, editing id: UUID?) -> [EntryWarning] {
-        EntryWarnings.check(kind, among: store.entries.filter { $0.id != id }, knowledge: knowledge)
+        let entries = store.entries
+        let others: [DictionaryEntry]
+        if let id, let index = entries.firstIndex(where: { $0.id == id }) {
+            others = Array(entries[..<index])
+        } else {
+            others = entries
+        }
+        return EntryWarnings.check(kind, among: others, knowledge: knowledge)
     }
 
     @discardableResult
@@ -149,6 +156,7 @@ public final class DictionaryViewModel: ObservableObject {
     }
 
     public func remove(id: UUID) {
+        guard store.entries.contains(where: { $0.id == id }) else { return }
         mutate { $0.remove(id: id) }
     }
 

Tests/SstDataTests/ViewSupportTests.swift

@@ -170,4 +170,21 @@ struct DictionaryViewModelTests {
         let asNew = model.warnings(for: .correction(heard: "cloud code", wrote: "Other"), editing: nil)
         #expect(asNew.contains { $0.level == .error })
     }
+
+    @Test func removingAnUnknownIdChangesNothing() throws {
+        let (model, store) = try makeModel("Supabase\n")
+        let before = store.entries
+        model.remove(id: UUID())
+        #expect(store.entries == before)
+        #expect(model.canUndo == false)
+    }
+
+    @Test func editingTheEarlierOfTwoDuplicatesShowsNoDuplicateError() throws {
+        let (model, store) = try makeModel("cloud code => A\nCloud-Code => B\n")
+        let first = store.entries[0]
+        let second = store.entries[1]
+        #expect(!model.warnings(for: first.kind, editing: first.id).contains { $0.level == .error })
+        #expect(model.warnings(for: second.kind, editing: second.id).contains { $0.level == .error })
+        #expect(model.warnings(for: first.kind, editing: nil).contains { $0.level == .error })
+    }
 }