Fix reader interaction and web resource handling

Sources/RDReaderView/EPUBCore/RDEPUBResourceURLSchemeHandler.swift

@@ -156,6 +156,7 @@ public final class RDEPUBResourceURLSchemeHandler: NSObject, WKURLSchemeHandler
                 }
                 Self.recordInMemoryResponse()
                 RDEPUBWebViewDebug.logSchemeTask("ResourceScheme", requestURL: requestURL, fileURL: fileURL, event: "finished")
+                return
             } catch {
                 guard self.isTaskActive(taskID) else {
                     DispatchQueue.main.async {
@@ -207,14 +208,8 @@ public final class RDEPUBResourceURLSchemeHandler: NSObject, WKURLSchemeHandler
             }
 
             let chunkSize = 65_536
-            var streamingCompleted = false
             defer {
                 fileHandle.closeFile()
-                if !streamingCompleted {
-                    // Task was cancelled during streaming; didFailWithError already sent above
-                    // or will be sent by the guard check below. No need to send again.
-                }
-                self.clearTask(taskID)
             }
             while true {
                 guard self.isTaskActive(taskID) else {
@@ -222,6 +217,7 @@ public final class RDEPUBResourceURLSchemeHandler: NSObject, WKURLSchemeHandler
                     DispatchQueue.main.async {
                         urlSchemeTask.didFailWithError(NSError(domain: NSURLErrorDomain, code: NSURLErrorCancelled))
                     }
+                    self.clearTask(taskID)
                     return
                 }
                 let data = fileHandle.readData(ofLength: chunkSize)
@@ -230,7 +226,6 @@ public final class RDEPUBResourceURLSchemeHandler: NSObject, WKURLSchemeHandler
                     urlSchemeTask.didReceive(data)
                 }
             }
-            streamingCompleted = true
             self.dispatchTaskSuccessCallback(
                 taskID: taskID,
                 urlSchemeTask: urlSchemeTask
@@ -265,6 +260,7 @@ public final class RDEPUBResourceURLSchemeHandler: NSObject, WKURLSchemeHandler
                 return
             }
             callback()
+            self.clearTask(taskID)
         }
     }