fix raw log stitching

services/ui_backend_service/data/cache/get_log_file_action.py

@@ -449,17 +449,22 @@ def paginated_result(content_iterator: Callable, page: int = 1, line_total: int
     total_pages = max(-(line_total // -limit), 1) if limit else 1
     _offset = limit * (total_pages - page) if reverse_order else limit * (page - 1)
     loglines = []
+    # lines included in the page should be [start, end[
     for lineno, item in enumerate(content_iterator()):
         ts, line = item
         if limit and lineno > (_offset + limit):
             break
-        if _offset and lineno < _offset:
+        if _offset and lineno <= _offset:
             continue
         l = line if output_raw else {"row": lineno, "timestamp": ts, "line": line}
         if reverse_order:
             loglines.insert(0, l)
         else:
             loglines.append(l)
+
+    if page != total_pages and loglines and output_raw:
+        # we want a trailing newline so raw logs get pieced together correctly
+        loglines.append("")
 
     return {
         "content": "\n".join(loglines) if output_raw else loglines,