v3.23.5: the TERMINAL RESPONSE result list and its spec corrections

The step editor's result select (the expect's respond, the proactive-drain's
respond/first) offered five symbolic values with no hex.  It now offers the
full TS 102 223 v18.3.0 8.12.0 list (00-3F), labelled '<hex> - <alias>' (or
'<hex> - <spec name>'), plus a manual hex entry, and an optional
additional-information byte for the general result (83 02 <result> <info>,
default 00; the 8.12.2 terminal-problem values are suggested through a
datalist).

The script aliases were corrected to the spec: refused 03->22,
not_understood 04->32, modified 06->07, no_response 22->12 - a stored script
using one of them now answers with the corrected value; no_response stays
accepted for compatibility but is no longer offered by the editor.

The server's TR decode tables (_RESULT_NAMES_BASIC/_GENERAL, a GSM 11.14
mix displayed in the proactive log) are replaced by the spec table plus the
8.12.2 additional-information names; the dcs field parses as hex (0A used to
be refused and 10 read as decimal 10); the drain summary's 22 label is fixed.

The result labels are not translated (spec text); the unused RU keys were
removed.  Shared fixture frontend/tests/tr_results.json, drift-guarded by
both suites.  855 frontend + 838 Python; sw cache simple-v418.

frontend/sw.js

@@ -1,4 +1,4 @@
-const CACHE = 'simple-v417';
+const CACHE = 'simple-v418';
 const URLS = [
   'index.html',
   'help.html',