v3.19.0 (cont.): live fixtures; menu text match is case-insensitive by default

No test scripts have been authored yet, so the format is still free to
change - the menu-select text match is now case-insensitive by default
(menu labels are UI text; case_sensitive: true still forces an exact-case
match, and a miss on it names the case-insensitive candidates).

Verification against the live card's own bytes (captured 2026-10-04):
- the Annex A Variant 2 Cyrillic menu (ids 128..130) resolves by text and
  the case behaviour above is pinned ('кофе' -> item 130);
- the applet's SEND SHORT MESSAGE (alpha 'Отправка...', SMS-SUBMIT to
  +79332505884) pins the new alpha and sms checks and the run-log line.

docs/help/api updated; sw cache simple-v388 (help pages changed).
Tests: 819 frontend + 726 Python.

pysim_simple_server/server.py

@@ -6033,22 +6033,34 @@ def _test_run_scp80(server, step, ctx):
 def _menu_item_by_text(server, p):
     """Resolve a menu-select step's text against the cached SET UP MENU items
     (the item ids vary with the applet's install parameters, so a script
-    matches the text the card actually shows).  Raises a ScriptError naming
+    matches the text the card actually shows; the match is case-insensitive
+    unless the step sets `case_sensitive: true`).  Raises a ScriptError naming
     the available items when nothing - or more than one item - matches."""
     menu = getattr(server, 'sim_menu', None) or {}
     items = menu.get('items') or []
     spec = {'mode': p.get('mode', 'exact'), 'value': p['text'],
-            'case_sensitive': p.get('case_sensitive', True)}
+            'case_sensitive': p.get('case_sensitive', False)}
     matches = [it for it in items
                if testscript.match_text(spec, it.get('text') or '')]
     if not matches:
         listing = ', '.join('%s=%r' % (it.get('id'), it.get('text'))
                             for it in items)
+        hint = ''
+        if spec.get('case_sensitive') and items:
+            # A strict-case miss is a common authoring slip with non-ASCII
+            # menus: name the items a case-insensitive match would find.
+            loose = [it for it in items if testscript.match_text(
+                dict(spec, case_sensitive=False), it.get('text') or '')]
+            if loose:
+                hint = (' - a case-insensitive match exists (%s): set '
+                        '"case_sensitive": false or fix the case'
+                        % ', '.join('%s=%r' % (it.get('id'), it.get('text'))
+                                    for it in loose))
         raise testscript.ScriptError(
-            'menu-select: no menu item matches %r (%s)'
+            'menu-select: no menu item matches %r (%s)%s'
             % (p['text'], 'menu: ' + listing if listing
                else 'no menu cached - fetch the menu (a SET UP MENU '
-                    'expectation) first'))
+                    'expectation) first', hint))
     if len(matches) > 1:
         raise testscript.ScriptError(
             'menu-select: %d items match %r (%s) - use the item id'

pysim_simple_server/testscript.py

@@ -281,7 +281,10 @@ def _normalise_params(kind, p):
             if mode not in ('exact', 'contains'):
                 raise ScriptError('menu-select: mode must be exact or contains')
             out['mode'] = mode
-            out['case_sensitive'] = bool(p.get('case_sensitive', True))
+            # Menu labels are UI text: case-insensitive by default (no test
+            # scripts predate this choice); `case_sensitive: true` forces an
+            # exact-case match.
+            out['case_sensitive'] = bool(p.get('case_sensitive', False))
         if not out:
             raise ScriptError('menu-select: item_id or text is required')
         if 'item_id' in out and 'text' in out: