net-sim: network-condition simulation in the Phone tab (v2.5.0)

Server (pysim_simple_server/netsim.py + POST /api/net-sim):
- pure builders for the observed phone write vocabulary (UICC_NAA.md §13):
  EPSNSC (A0 TLV with KSI/KASME/counts/algo, padded to the card's FCP record
  size; invalidate-wipe and invalidate-keep-key), LOCI/PSLOCI/EPSLOCI real
  and dummy forms (PLMN kept, LAC FFFE, status 01/02), Kc/KcGPRS (9-byte
  USIM and 33-byte GSM forms, 07 invalidates), EF.SMSstatus counter bump
  (read-modify-write), CBMI/CBMIR, the Location status event (9B 01 <st>,
  with the optional 13 07 location info for normal service) and the
  AUTHENTICATE APDU (TS 31.102 7.1.2.1) with DB/DC response parsing
- scenario runner executes the recipes under _CARD_LOCK, picks the first
  existing candidate path (ADF.USIM vs DF.GSM/DF.TELECOM), reads FCP/current
  records where the format is card-specific, skips the event unless the card
  subscribed to Location status, honours the scenario toggles and returns a
  per-step log; only D6/DC, ENVELOPE and AUTHENTICATE are ever sent
- GET /api/mcc-mnc serves the optional worldwide operator list
  (--mcc-mnc-list, default <workspace>/samples/mcc-mnc-list.json): ?q=
  search and ?random=1&exclude= for roaming; the list stays out of the repo

PWA:
- Phone pill gains a 'Network simulation' fieldset: one button per scenario
  (cold boot, EPS/2G attach, service lost, limited service, roaming denied,
  churn, SMS received, CB reconfig, AUTHENTICATE), a collapsed Parameters
  block (operator search + random roaming, LAC/Cell ID/TAC/RAC, optional
  identities, toggles, churn count/delay) and a step log with SWs
- i18n EN/RU, help/README/api.md/AGENTS.md updated; version 2.5.0,
  SW cache simple-v193

Tests: tests/test_netsim.py (19), frontend/tests/netsim.test.js (3) and
html guards - 423 frontend / 280 Python, all passing

pysim_simple_server/__main__.py

@@ -28,6 +28,14 @@ def _default_web_dir():
     return os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'frontend')
 
 
+def _default_mcc_mnc_list():
+    # Workspace default: the CC-BY-SA operator list lives outside the repo
+    # (<workspace>/samples/mcc-mnc-list.json); clones can point elsewhere with
+    # --mcc-mnc-list and the endpoint reports available=false when missing.
+    repo = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+    return os.path.normpath(os.path.join(repo, '..', 'samples', 'mcc-mnc-list.json'))
+
+
 def main():
     global _server_start
     _server_start = time.time()
@@ -38,6 +46,8 @@ def main():
     parser.add_argument('--http-port', type=int, default=8080, help='Bind port (default: 8080)')
     parser.add_argument('--web-dir', default=_default_web_dir(), metavar='PATH',
                         help='Directory with the SIMple PWA static files to serve (default: <repo>/frontend)')
+    parser.add_argument('--mcc-mnc-list', default=_default_mcc_mnc_list(), metavar='PATH',
+                        help='Worldwide MCC/MNC operator list (JSON) for the network-simulation operator picker (default: <workspace>/samples/mcc-mnc-list.json)')
     parser.add_argument('--log-requests', action='store_true', default=False, help='Log request/response payloads to stderr')
     parser.add_argument('--sms-oa', default='12345', metavar='DIGITS',
                         help='TP-Originating-Address (SMSC number) for the SMS-DELIVER TPDU (default: 12345)')
@@ -213,6 +223,7 @@ def main():
     server.terminal_profile = opts.terminal_profile
     server.cli_terminal_profile = opts.terminal_profile
     server.web_dir = opts.web_dir
+    server.mcc_mnc_path = opts.mcc_mnc_list
     server.sim_menu = sim_menu
     server.event_list = event_list
     server.menu_active = False