Save note content when editor disappears

Extract persistNote() from saveNote() to allow saving without closing
  the editor. Call persistNote() from onDisappear (when notch retracts)
  and cancelEdit() so user changes are never silently discarded.
  Empty new notes (no title, no content, no image) are skipped.

DynamicIsland/components/Notch/NotchNotesView.swift

@@ -102,6 +102,9 @@ struct NotchNotesView: View {
             updateLayoutState()
         }
         .onDisappear {
+            if isEditingNewNote || selectedNoteId != nil {
+                persistNote()
+            }
             coordinator.notesLayoutState = .list
         }
         .onChange(of: isEditingNewNote) { _, _ in
@@ -197,48 +200,55 @@ struct NotchNotesView: View {
         isEditingNewNote = false
     }
     
-    private func saveNote() {
+    private func persistNote() {
+        guard let id = editorNoteId else { return }
+
+        let isExistingNote = savedNotes.contains(where: { $0.id == id })
+        if !isExistingNote && editorTitle.isEmpty && editorContent.isEmpty && editorImageData == nil {
+            return
+        }
+
         var notes = savedNotes
         let now = Date()
 
-        if let id = editorNoteId {
+        var fileName: String? = nil
-            // Priority: Save image to disk if it exists
+        if let data = editorImageData {
-            var fileName: String? = nil
+            let name = "note_image_\(id.uuidString).png"
-            if let data = editorImageData {
+            let fileURL = NoteItem.noteImageDataDirectory.appendingPathComponent(name)
-                let name = "note_image_\(id.uuidString).png"
+            try? data.write(to: fileURL)
-                let fileURL = NoteItem.noteImageDataDirectory.appendingPathComponent(name)
+            fileName = name
-                try? data.write(to: fileURL)
-                fileName = name
-            }
-
-            if let index = notes.firstIndex(where: { $0.id == id }) {
-                // Update
-                // If there was an old image and it's being replaced or removed, delete old file
-                if let oldFileName = notes[index].imageFileName, oldFileName != fileName {
-                    let oldFileURL = NoteItem.noteImageDataDirectory.appendingPathComponent(oldFileName)
-                    try? FileManager.default.removeItem(at: oldFileURL)
-                }
-                
-                notes[index].title = editorTitle
-                notes[index].content = editorContent
-                notes[index].imageFileName = fileName
-                notes[index].colorIndex = editorColorIndex
-            } else {
-                // Create
-                let newNote = NoteItem(
-                    id: id,
-                    title: editorTitle.isEmpty ? "Untitled Note" : editorTitle,
-                    content: editorContent,
-                    creationDate: now,
-                    colorIndex: editorColorIndex,
-                    isPinned: false,
-                    imageFileName: fileName
-                )
-                notes.insert(newNote, at: 0)
-            }
-            savedNotes = notes // Persistence fix: save back to @Default
         }
 
+        if let index = notes.firstIndex(where: { $0.id == id }) {
+            // Update
+            if let oldFileName = notes[index].imageFileName, oldFileName != fileName {
+                let oldFileURL = NoteItem.noteImageDataDirectory.appendingPathComponent(oldFileName)
+                try? FileManager.default.removeItem(at: oldFileURL)
+            }
+
+            notes[index].title = editorTitle
+            notes[index].content = editorContent
+            notes[index].imageFileName = fileName
+            notes[index].colorIndex = editorColorIndex
+        } else {
+            // Create
+            let newNote = NoteItem(
+                id: id,
+                title: editorTitle.isEmpty ? "Untitled Note" : editorTitle,
+                content: editorContent,
+                creationDate: now,
+                colorIndex: editorColorIndex,
+                isPinned: false,
+                imageFileName: fileName
+            )
+            notes.insert(newNote, at: 0)
+        }
+
+        savedNotes = notes
+    }
+
+    private func saveNote() {
+        persistNote()
         closeEditor()
     }
     
@@ -311,6 +321,7 @@ struct NotchNotesView: View {
     }
 
     private func cancelEdit() {
+        persistNote()
         closeEditor()
     }