Fix context_text extraction to start from XPointer offset

main.lua

@@ -675,6 +675,11 @@ function Bookhoard:getContextText()
     end
     if not text or text == "" then return "" end
 
+    local char_offset = tonumber(xp:match("text%(%)%.?(%d+)")) or 0
+    if char_offset > 0 and char_offset < #text then
+        text = text:sub(char_offset + 1)
+    end
+
     if #text > 100 then
         text = text:sub(1, 100)
     end