fix: select the ISD-R before the profile switch command

The switch refactor dropped the ISD-R selection that the old
_transceive/_run wrapper performed, so the STORE DATA went to whatever
application was selected (MF after a preceding ES10 call) and the card
answered 6D00 ('instruction not supported') without ever reaching the
switch flow.

- esim.switch_profile() now takes the app, selects the ISD-R before
  sending the raw STORE DATA and restores the selection in a finally,
  like the other ES10 functions.
- tests assert the selection and the restore for the 9000 and 91XX
  paths (the FakeLchan/rs already track both).

pysim_simple_server/esim.py

@@ -509,13 +509,15 @@ def parse_switch_response(action, data_hex):
             'message': _error_text(result)}
 
 
-def switch_profile(send_apdu, run_chain, action, iccid=None, isdp_aid=None,
+def switch_profile(app, send_apdu, run_chain, action, iccid=None,
-                   refresh=True):
+                   isdp_aid=None, refresh=True):
-    """Run an ES10c Enable/DisableProfile switch.
+    """Run an ES10c Enable/DisableProfile switch on the ISD-R.
 
     ``send_apdu(apdu_hex) -> (data_hex, sw)`` performs one raw STORE DATA and
     ``run_chain(sw91)`` answers the proactive command(s) the card sends
-    alongside the switch (True when a REFRESH was answered).
+    alongside the switch (True when a REFRESH was answered).  The ISD-R is
+    selected first and the previous selection restored afterwards, like the
+    other ES10 functions.
 
     With the refresh flag set the ISD-R returns OK *before* the REFRESH
     (SGP.22 v2.6 §5.7.16/§5.7.17 step 6) and the switch completes upon the
@@ -523,6 +525,8 @@ def switch_profile(send_apdu, run_chain, action, iccid=None, isdp_aid=None,
     OK: the STORE DATA is never retried (the mid-switch card answers 6985 to
     the retry) and the caller re-initializes the card afterwards."""
     apdu = build_switch_apdu(action, iccid, isdp_aid, refresh)
+    _select_isdr(app)
+    try:
         data, sw = send_apdu(apdu)
         if sw == '9000':
             out = parse_switch_response(action, data)
@@ -538,3 +542,5 @@ def switch_profile(send_apdu, run_chain, action, iccid=None, isdp_aid=None,
                     'refresh_seen': refresh_seen}
         return {'ok': False, 'result': 'undefinedError', 'sw': sw,
                 'message': 'SW %s' % sw}
+    finally:
+        _restore(app)

pysim_simple_server/server.py

@@ -3861,7 +3861,7 @@ class PysimHandler(BaseHTTPRequestHandler):
                     _finish_pending_menu(self.server, self.server.scc)
                     cursor = _PROACTIVE_ENTRY_ID
                     resp = esim.switch_profile(
-                        self.server.scc._tp.send_apdu,
+                        app, self.server.scc._tp.send_apdu,
                         lambda sw: _esim_refresh_chain(self.server, sw),
                         action, iccid=body.get('iccid'),
                         isdp_aid=body.get('isdp_aid'),

tests/test_esim.py

@@ -239,9 +239,11 @@ class EsimTests(unittest.TestCase):
         self.assertEqual(out['result'], 'undefinedError')
 
     def test_switch_profile_parses_ok_response(self):
+        app, lchan = make_app()
         sent = []
         resp = EnableProfileResp(children=[EnableResult(decoded='ok')])
         out = esim.switch_profile(
+            app,
             lambda apdu: sent.append(apdu) or (resp.to_tlv().hex(), '9000'),
             lambda sw: self.fail('no chain expected'),
             'enable', iccid='8970119000004002667')
@@ -249,10 +251,15 @@ class EsimTests(unittest.TestCase):
         self.assertEqual(out['result'], 'ok')
         self.assertFalse(out['refresh_seen'])
         self.assertEqual(len(sent), 1)
+        # the ISD-R was selected for the command and the selection restored
+        self.assertEqual(lchan.selected.name, 'ISD-R')
+        self.assertEqual(app.rs.resets, 1)
 
     def test_switch_profile_treats_91xx_as_ok_and_runs_the_chain(self):
+        app, lchan = make_app()
         chain = []
         out = esim.switch_profile(
+            app,
             lambda apdu: ('', '9111'),
             lambda sw: chain.append(sw) or True,
             'disable', iccid='8970119000004002667')
@@ -260,17 +267,22 @@ class EsimTests(unittest.TestCase):
         self.assertEqual(out['result'], 'ok')
         self.assertTrue(out['refresh_seen'])
         self.assertEqual(chain, ['9111'])
+        self.assertEqual(lchan.selected.name, 'ISD-R')
+        self.assertEqual(app.rs.resets, 1)
 
     def test_switch_profile_chain_failure_keeps_the_accepted_switch(self):
+        app, _ = make_app()
+
         def boom(sw):
             raise RuntimeError('fetch failed')
-        out = esim.switch_profile(lambda apdu: ('', '910f'), boom,
+        out = esim.switch_profile(app, lambda apdu: ('', '910f'), boom,
                                   'disable', iccid='8970119000004002667')
         self.assertTrue(out['ok'])
         self.assertFalse(out['refresh_seen'])
 
     def test_switch_profile_reports_error_sw(self):
-        out = esim.switch_profile(lambda apdu: ('', '6985'),
+        app, _ = make_app()
+        out = esim.switch_profile(app, lambda apdu: ('', '6985'),
                                   lambda sw: self.fail('no chain expected'),
                                   'disable', iccid='8970119000004002667')
         self.assertFalse(out['ok'])