[LyX/master] Fix revert_contextual_breaks

[Juergen Spitzmueller]

commit 8181d133adfe44059d5c9a3cfac1fb6a4a6b61d6
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Tue Aug 4 06:31:48 2026 +0200

    Fix revert_contextual_breaks
    
    This didn't account for all Frame types
    
    Thanks to Pavel and Claude
---
 lib/lyx2lyx/lyx_2_6.py | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/lib/lyx2lyx/lyx_2_6.py b/lib/lyx2lyx/lyx_2_6.py
index 00ded52956..f88d3f011b 100644
--- a/lib/lyx2lyx/lyx_2_6.py
+++ b/lib/lyx2lyx/lyx_2_6.py
@@ -627,11 +627,21 @@ def revert_contextual_breaks(document):
             handled = False
             k = i - 1
             while True:
-                k = find_token_backwards(document.body, "\\begin_layout Frame", k)
+                kInit = k
+                poss_frame = -1
+                last_poss_frame = -1
+                # check for the nearest frame
+                for frame in ["Frame", "PlainFrame", "FragileFrame"]:
+                    poss_frame = find_token_backwards(document.body, "\\begin_layout %s" % frame, kInit)
+                    if poss_frame != -1:
+                        if poss_frame > last_poss_frame:
+                            k = poss_frame
+                            last_poss_frame = poss_frame
                 if k == -1:
                     break
                 l = find_end_of_sequence(document.body, k)
                 if l > i:
+                    # break is within frame (this includes nested paragraphs)
                     document.body[i : j + 1] = put_cmd_in_ert("\\framebreak{}")
                     i += 1
                     handled = True