fix: Remove double-inversion of summary length - Browser already reverses range slider in RTL - Sending raw value now matches correctly: طويل→3, قصير→1

src/index.html

@@ -1034,7 +1034,7 @@
           },
           body: JSON.stringify({
             text: text,
-            length: 4 - parseInt(lengthValue),
+            length: parseInt(lengthValue),
             full_text: isFullText
           })
         });