Import COMPRION trace exports (Protocol Layer + Application Layer time base)

- new `simtrace_analyser/comprion.py`: parses the tab-separated ISO Protocol
  Layer export (metadata block, ATR/PPS exchanges, APDUs with continuation
  rows, delays in etu) and re-encodes every exchange into the wire-shaped
  TPDUs the analyser stores — a case-4 exchange becomes the command, a
  fabricated `61 <len>` status word and a GET RESPONSE (command's logical
  channel preserved), so command/response pairing, FCP/file decoding and the
  GET RESPONSE filters work unchanged; Cold reset / Power off become RST/VCC
  line events, deliberately without the sigrok CLK extension (the export
  carries no clock measurement)
- optional matching **ISO Application Layer** export as the exact time base:
  its one `Time:` row per exchange (ms precision) replaces the delay estimate
  (0-based elapsed, `started = Session Name + first Time`), guarded by a
  session-identity check (`Session Name`, falling back to `Working
  directory`; the two layers' export timestamps differ and are not compared)
  and an exchange-count check — mismatched files are refused, never mixed
- protocol-only imports keep the Delay-based timeline: card/line activity
  time (host pauses absent), the unit assuming 3.8 MHz (`CLK_HZ`); the
  estimate is not fed into the CLK/RST line-event annotation
- `POST /api/sessions/import?format=comprion` (raw text body, or a JSON
  `{text, times_text}` bundle) with stable error codes (app_layer /
  not_comprion / unsupported_layout / no_data / times_unparsable /
  session_mismatch / time_base_unverified / time_base_mismatch); a COMPRION
  file dropped on the PCAP path answers with a pointer (comprion_export);
  session mode `comprion`, window from the Session Name
- PWA: import dialog with two separate pickers (Protocol Layer required,
  Application Layer optional) whose hint switches between "activity time"
  and "exact timestamps"; errors stay in the dialog with both selections
  until fixed or cancelled (Cancel/Esc, also disabled while importing);
  EN/RU
- tests: tests/test_comprion.py (parser, wire encoding, time base + guards,
  import endpoint) and frontend/tests/comprion.test.js (file checks, slot
  validation, dialog state machine with a DOM stub, RU coverage)
- v2.2.0; MIN_SERVER_VERSION 2.2.0; SW cache simtrace-analyser-v61

frontend/sw.js

@@ -1,4 +1,4 @@
-const CACHE = 'simtrace-analyser-v57';
+const CACHE = 'simtrace-analyser-v61';
 
 const PRECACHE = [
     'index.html',