docs: fix version compatibility (PWA vs server majors), broaden descriptions, drop the header slogan (v2.3.1)

- version check in pysimConnect() now compares the server major against
  SIMPLE_VERSION (2.3.1) instead of the hardcoded 1.x assumption; the header
  version is rendered from the same constant
- removed the 'SIM OTA with a Human Face' slogan (span, i18n key, translate
  hook) to free header space
- broaden the PWA description in manifest.json/package.json and the help
  overview (EN/RU): APDU workbench, OTA lab, CAT/STK simulator, card profiler
- version compatibility tables in README/RUS, help EN/RU and docs/api.md now
  describe the major-version rule
- README/RUS: Cards promoted to a top-level section; EN duplicate
  Theme/Localisation sections removed
- docs: /api/cardinfo documented; SCP81 'expose framing options' next-work
  item dropped (done); local AGENTS.md not-implemented note corrected
- SW cache simple-v190

docs/scp81-findings.md

@@ -308,8 +308,7 @@ INSTALL [for install] -> registries.
 ## Next tests / work
 
 1. **UI:** group the per-page R-APDUs under their logical command in the
-   SCP81 tab (page merging/decoding for ELF and application listings);
-   expose the framing options in the tab.
+   SCP81 tab (page merging/decoding for ELF and application listings).
 2. **Load/store over SCP81:** implemented - `POST /api/scp81/gen-install`
    takes a `.cap`, expands it with the shared `_cap_apdu_sequence` helper
    (INSTALL [for load] -> 240-byte LOAD blocks -> INSTALL [for install]) and