fix(web): a client that hangs up is logged at INFO and not answered; the 400 follows the marker, not io.ErrUnexpectedEOF; hasNote (third review)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

internal/web/uploads.go

@@ -95,6 +95,9 @@ func (a *App) handleUploadPost(w http.ResponseWriter, r *http.Request) {
 		}
 		if err != nil {
 			var tooBig *http.MaxBytesError
+			if a.abandoned(r) {
+				return
+			}
 			if !errors.As(err, &tooBig) {
 				// A malformed multipart body (a header with a control byte, a truncated
 				// part) is the sender's to fix: a 400, not a server error, and the error
@@ -130,10 +133,24 @@ func (a *App) handleUploadPost(w http.ResponseWriter, r *http.Request) {
 	a.renderUploadsPage(w, r, userID, http.StatusBadRequest, "Choose an audio file to upload.")
 }
 
+// abandoned reports, and logs at INFO, that the client has already gone: its request
+// context is cancelled, so there is nobody to answer and rendering a page would run its
+// database read on a dead context and log a false ERROR. A hang-up mid-upload is routine.
+func (a *App) abandoned(r *http.Request) bool {
+	if r.Context().Err() == nil {
+		return false
+	}
+	a.logger().Info("upload abandoned", "reason", "client_gone")
+	return true
+}
+
 // uploadFailure maps an Accept (or multipart) error to a response: a validation
 // rejection is the user's to fix (422, or 413 for size) and carries its own
 // message; anything else is ours.
 func (a *App) uploadFailure(w http.ResponseWriter, r *http.Request, userID string, err error) {
+	if a.abandoned(r) {
+		return
+	}
 	var rej *uploads.RejectError
 	var tooBig *http.MaxBytesError
 	switch {
@@ -152,8 +169,9 @@ func (a *App) uploadFailure(w http.ResponseWriter, r *http.Request, userID strin
 		a.logger().Info("upload rejected", "reason", string(uploads.ReasonTooLarge))
 		a.renderUploadsPage(w, r, userID, http.StatusRequestEntityTooLarge,
 			"This file is larger than the upload limit.")
-	case errors.Is(err, io.ErrUnexpectedEOF):
-		// The sender hung up mid-file: theirs to retry, not a server fault.
+	case errors.Is(err, uploads.ErrClientRead):
+		// An error reading the CLIENT's body: theirs to retry, not a server fault. Only that
+		// marker counts: io.ErrUnexpectedEOF alone is also what a database drop looks like.
 		a.logger().Info("upload rejected", "reason", "truncated")
 		a.renderUploadsPage(w, r, userID, http.StatusBadRequest, "The upload was cut off before it finished. Please try again.")
 	default:
@@ -219,6 +237,17 @@ func titleFromFilename(name string) string {
 	return t
 }
 
+// hasNote reports whether any phase carries a note. A note is the only warning for a
+// recording that is shorter than its file claimed, so a record that has one is shown open.
+func hasNote(steps []domain.ProgressStep) bool {
+	for _, s := range steps {
+		if s.Note != "" {
+			return true
+		}
+	}
+	return false
+}
+
 // uuidShape is the form of an upload id. Anything else cannot be one, so it is a 404.
 var uuidShape = regexp.MustCompile(`^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$`)