feat: improve epub reader controls and annotations

Sources/RDEpubReaderView/EPUBCore/Models/RDEPUBAnnotationModels.swift

@@ -110,6 +110,10 @@ public struct RDEPUBHighlight: Codable, Equatable {
 
     public var note: String?
 
+    /// True when this record was created directly as an annotation instead of
+    /// adding a note to an existing underline.
+    public var isAnnotationOnly: Bool
+
     public var createdAt: Date
 
     public init(
@@ -118,9 +122,10 @@ public struct RDEPUBHighlight: Codable, Equatable {
         location: RDEPUBLocation,
         text: String,
         rangeInfo: String? = nil,
-        style: RDEPUBHighlightStyle = .highlight,
+        style: RDEPUBHighlightStyle = .underline,
         color: String = "#F8E16C",
         note: String? = nil,
+        isAnnotationOnly: Bool = false,
         createdAt: Date = Date()
     ) {
         self.id = id
@@ -131,6 +136,7 @@ public struct RDEPUBHighlight: Codable, Equatable {
         self.style = style
         self.color = color
         self.note = note?.nilIfEmpty
+        self.isAnnotationOnly = isAnnotationOnly
         self.createdAt = createdAt
     }
 
@@ -152,6 +158,7 @@ public struct RDEPUBHighlight: Codable, Equatable {
         case style
         case color
         case note
+        case isAnnotationOnly
         case createdAt
     }
 
@@ -164,12 +171,13 @@ public struct RDEPUBHighlight: Codable, Equatable {
         rangeInfo = try container.decodeIfPresent(String.self, forKey: .rangeInfo)?.nilIfEmpty
         if let rawStyle = try container.decodeIfPresent(String.self, forKey: .style),
            let decodedStyle = RDEPUBHighlightStyle(rawValue: rawStyle) {
-            style = decodedStyle
+            style = decodedStyle == .highlight ? .underline : decodedStyle
         } else {
-            style = .highlight
+            style = .underline
         }
         color = try container.decodeIfPresent(String.self, forKey: .color) ?? "#F8E16C"
         note = try container.decodeIfPresent(String.self, forKey: .note)?.nilIfEmpty
+        isAnnotationOnly = try container.decodeIfPresent(Bool.self, forKey: .isAnnotationOnly) ?? false
         createdAt = try container.decodeIfPresent(Date.self, forKey: .createdAt) ?? Date()
     }
 
@@ -183,6 +191,7 @@ public struct RDEPUBHighlight: Codable, Equatable {
         try container.encode(style, forKey: .style)
         try container.encode(color, forKey: .color)
         try container.encodeIfPresent(note, forKey: .note)
+        try container.encode(isAnnotationOnly, forKey: .isAnnotationOnly)
         try container.encode(createdAt, forKey: .createdAt)
     }