Extract EditHandlers ViewModifier to fix Release type-check timeout

The .toggleSourceEdit / .saveFile / .openInExternalEditor onReceive blocks
on webViewLayer (already a long modifier chain) pushed Release-mode
type-checking past its budget. Pull them into a dedicated EditHandlers
ViewModifier alongside the existing ZoomHandlers / FindHandlers.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: thieso2

Sources/FileBrowser/DirectoryWindowView.swift

@@ -256,18 +256,15 @@ struct DirectoryWindowView: View {
                 guard isKeyWindow, selectedFile != nil else { return }
                 webViewStore.exportPDF()
             }
-            .onReceive(NotificationCenter.default.publisher(for: .openInExternalEditor)) { _ in
-                guard isKeyWindow, let file = selectedFile, !isAutoIndex(file) else { return }
-                openInExternalEditor(file.absolutePath)
-            }
-            .onReceive(NotificationCenter.default.publisher(for: .toggleSourceEdit)) { _ in
-                guard isKeyWindow else { return }
-                toggleSourceEdit()
-            }
-            .onReceive(NotificationCenter.default.publisher(for: .saveFile)) { _ in
-                guard isKeyWindow, isEditing else { return }
-                saveEditorText()
-            }
+            .modifier(EditHandlers(
+                isKeyWindow: isKeyWindow,
+                onExternal: {
+                    guard let file = selectedFile, !isAutoIndex(file) else { return }
+                    openInExternalEditor(file.absolutePath)
+                },
+                onToggleSource: { toggleSourceEdit() },
+                onSave: { if isEditing { saveEditorText() } }
+            ))
             .onReceive(NotificationCenter.default.publisher(for: .settingsChanged)) { _ in
                 handleSettingsChanged()
             }
@@ -1293,3 +1290,26 @@ struct FindHandlers: ViewModifier {
             }
     }
 }
+
+struct EditHandlers: ViewModifier {
+    let isKeyWindow: Bool
+    let onExternal: () -> Void
+    let onToggleSource: () -> Void
+    let onSave: () -> Void
+
+    func body(content: Content) -> some View {
+        content
+            .onReceive(NotificationCenter.default.publisher(for: .openInExternalEditor)) { _ in
+                guard isKeyWindow else { return }
+                onExternal()
+            }
+            .onReceive(NotificationCenter.default.publisher(for: .toggleSourceEdit)) { _ in
+                guard isKeyWindow else { return }
+                onToggleSource()
+            }
+            .onReceive(NotificationCenter.default.publisher(for: .saveFile)) { _ in
+                guard isKeyWindow else { return }
+                onSave()
+            }
+    }
+}