startup: cardless start is a normal state, not an init failure (v2.2.17)

- __main__ catches NoCardError from the startup init (fast and stock paths,
  and the stock fallback) and reports it with one line - 'INIT: no card in
  the reader - server ready; insert a card or press Equip' - without a
  traceback and without the stock-pysim fallback. Any other init failure
  still falls back with its traceback.
- The cardless PysimApp construction no longer prints pySim's 'Waiting for
  card...' or pySim-shell's 'pySim-shell not equipped!': a new _LineFilter
  (server.py) drops whole matching lines while proxying encoding/isatty/
  fileno (the cmd2 Rich console probes them on its stdout).
- Removed the now-duplicate 'INIT: card not initialized' tail line and the
  cat_cla assignment when no card was detected (scc exists but is cardless).
- Tests: tests/test_startup_cardless.py (line filter semantics incl. partial
  lines, one-line cardless report, no fallback call, real failures keep the
  fallback + traceback, muted PysimApp construction). Live-verified against
  an empty SCR 3310: two init lines, no traceback, API serves 2.2.17.
- Docs: READMEs quick start, help EN+RU (Card reader), AGENTS (equip flow).
  SW cache otaman-v184.

README.md

@@ -17,7 +17,7 @@ cd otaman
 ./start.sh     # or start.bat — starts the server (it serves the PWA too)
 ```
 
-Then open http://127.0.0.1:8080 — the UI and API share one origin, so no CORS or browser-permission setup is needed.
+Then open http://127.0.0.1:8080 — the UI and API share one origin, so no CORS or browser-permission setup is needed. The server starts fine with an empty reader (no card is a normal state): insert a card and it is initialized automatically (auto-equip), or press **Equip card** in the UI.
 
 ## Build