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

frontend/style.css

@@ -823,6 +823,10 @@ video {
   max-height: 14rem;
 }
 
+.max-h-\[30vh\] {
+  max-height: 30vh;
+}
+
 .max-h-\[35vh\] {
   max-height: 35vh;
 }
@@ -919,6 +923,10 @@ video {
   width: 1.5rem;
 }
 
+.w-64 {
+  width: 16rem;
+}
+
 .w-72 {
   width: 18rem;
 }
@@ -940,6 +948,10 @@ video {
   min-width: 0px;
 }
 
+.min-w-\[14rem\] {
+  min-width: 14rem;
+}
+
 .min-w-\[180px\] {
   min-width: 180px;
 }
@@ -1265,6 +1277,11 @@ video {
   border-top-color: transparent;
 }
 
+.bg-amber-600 {
+  --tw-bg-opacity: 1;
+  background-color: rgb(217 119 6 / var(--tw-bg-opacity, 1));
+}
+
 .bg-black\/50 {
   background-color: rgb(0 0 0 / 0.5);
 }
@@ -1693,6 +1710,11 @@ video {
   color: #f1f5f9;
 }
 
+.hover\:bg-amber-700:hover {
+  --tw-bg-opacity: 1;
+  background-color: rgb(180 83 9 / var(--tw-bg-opacity, 1));
+}
+
 .hover\:bg-blue-700:hover {
   --tw-bg-opacity: 1;
   background-color: rgb(29 78 216 / var(--tw-bg-opacity, 1));