Force beeper linkpreviews field in replies

internal/matrixbot/bot.go

@@ -3,6 +3,7 @@ package matrixbot
 
 import (
 	"context"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"html"
@@ -214,7 +215,17 @@ func (b *Bot) sendReply(ctx context.Context, evt *event.Event, response string)
 		content.SetReply(evt)
 	}
 
-	_, err := b.client.SendMessageEvent(ctx, evt.RoomID, event.EventMessage, content)
+	payload, err := json.Marshal(content)
+	if err != nil {
+		return err
+	}
+	var contentMap map[string]any
+	if err := json.Unmarshal(payload, &contentMap); err != nil {
+		return err
+	}
+	contentMap["com.beeper.linkpreviews"] = []any{}
+
+	_, err = b.client.SendMessageEvent(ctx, evt.RoomID, event.EventMessage, contentMap)
 	return err
 }
 
@@ -416,8 +427,7 @@ func splitLinkLine(line string) (string, string, bool) {
 }
 
 func obfuscateURL(url string) string {
-	// Break client-side link preview parsers while preserving readability.
-	return strings.Replace(url, "://", ":\u2060//", 1)
+	return url
 }
 
 func isEncryptedInvite(evt *event.Event) bool {