fix: reload tint colors while running

Sources/Conjure/NotesTextView.swift

@@ -17,6 +17,60 @@ final class NotesTextView: NSTextView {
     private var markerColumn: CGFloat = 22
     private var checkboxes: [NSButton] = []
     private var listParagraphs: [(range: NSRange, kind: String, depth: Int, number: Int, checked: Bool)] = []
+    private var themeObservation: ThemeObservation?
+
+    override init(frame frameRect: NSRect = .zero) {
+        super.init(frame: frameRect)
+    }
+
+    override init(frame frameRect: NSRect, textContainer container: NSTextContainer?) {
+        super.init(frame: frameRect, textContainer: container)
+        themeObservation = ThemeObservation { [weak self] in self?.applyTheme() }
+    }
+
+    required init?(coder: NSCoder) { fatalError("Conjure creates note editors programmatically") }
+
+    /// Only visual attributes change here; semantic marks, selection and undo sessions stay intact.
+    private func applyTheme() {
+        insertionPointColor = ThemePalette.accent
+        selectedTextAttributes = [.backgroundColor: ThemePalette.selectionFill]
+        let typing = currentTypingAttributes
+        if let storage = textStorage {
+            let full = NSRange(location: 0, length: storage.length)
+            edits.disableUndoRegistration()
+            storage.beginEditing()
+            storage.enumerateAttributes(in: full) { attributes, range, _ in
+                let codeBlock = attributes[NoteAttributes.block] as? String == "code"
+                let inlineCode = attributes[NoteAttributes.inlineCode] as? Bool == true
+                storage.addAttribute(.foregroundColor,
+                    value: inlineCode || attributes[.link] != nil ? ThemePalette.accent : ThemePalette.text,
+                    range: range)
+                if codeBlock || inlineCode {
+                    storage.addAttribute(.backgroundColor, value: ThemePalette.selectionFill, range: range)
+                }
+            }
+            applyCodeColors(to: storage)
+            storage.endEditing()
+            edits.enableUndoRegistration()
+        }
+        setTypingAttributes(typing)
+        for button in checkboxes { button.contentTintColor = ThemePalette.accent }
+        needsDisplay = true
+    }
+
+    private func applyCodeColors(to storage: NSTextStorage) {
+        let source = storage.string as NSString
+        storage.enumerateAttribute(NoteAttributes.block, in: NSRange(location: 0, length: storage.length)) { value, range, _ in
+            guard value as? String == "code" else { return }
+            let code = source.substring(with: range)
+            let language = storage.attribute(NoteAttributes.language, at: range.location, effectiveRange: nil) as? String
+            guard let highlighted = Self.highlighter.highlight(code, as: language), highlighted.string == code else { return }
+            highlighted.enumerateAttribute(.foregroundColor, in: NSRange(location: 0, length: highlighted.length)) { value, run, _ in
+                if let value { storage.addAttribute(.foregroundColor, value: value,
+                    range: NSRange(location: range.location + run.location, length: run.length)) }
+            }
+        }
+    }
     var vimState = NotesVimState() {
         didSet { if oldValue.mode != vimState.mode { needsDisplay = true } }
     }
@@ -517,16 +571,7 @@ final class NotesTextView: NSTextView {
             }
             index = NSMaxRange(row)
         }
-        storage.enumerateAttribute(NoteAttributes.block, in: full) { value, range, _ in
-            guard value as? String == "code" else { return }
-            let code = source.substring(with: range)
-            let language = storage.attribute(NoteAttributes.language, at: range.location, effectiveRange: nil) as? String
-            guard let highlighted = Self.highlighter.highlight(code, as: language), highlighted.string == code else { return }
-            highlighted.enumerateAttribute(.foregroundColor, in: NSRange(location: 0, length: highlighted.length)) { value, run, _ in
-                if let value { storage.addAttribute(.foregroundColor, value: value,
-                    range: NSRange(location: range.location + run.location, length: run.length)) }
-            }
-        }
+        applyCodeColors(to: storage)
         storage.enumerateAttribute(.attachment, in: full) { value, _, _ in
             guard let attachment = value as? NSTextAttachment,
                   let cell = attachment.attachmentCell as? NSTextAttachmentCell, let image = cell.image else { return }