v3.25.6: the PLI dictionary save feedback + the timer wording

The v3.25.5 report's follow-ups: a field the server could not use was
silently dropped, and the PWA also filtered non-hex fields client-side
(never sending them).  The POST now collects them and names them in the
response - `invalid` (a malformed key/value: not hex, an odd number of
digits, a non-string value) and `unknown` (a well-formed code outside the
qualifier list), both omitted when everything was applied - and the PWA's
Save sends every field, composes "Not saved: 0A (invalid value), 18
(unknown qualifier)" (`pysimPliRejectMsg`) into a new #pli-save-msg line
under the button and shows "Not saved" briefly.

The guide's timer exception now says "card-initiated automatic action"
(the timer retries every 5 s; polling/menu are suspended, not retrying).

Docs: api.md's POST contract, help EN/RU - which also said "22 PLI
qualifiers" while the list has 25.  Tests: the rejection lists per case
(odd length, non-hex value/key, non-string, unknown code) and the
valid-save absence, the PWA message helper and the wiring pins.
887 frontend + 875 Python; sw cache simple-v430.

pysim_simple_server/server.py

@@ -36,7 +36,7 @@ from osmocom.tlv import BER_TLV_IE
 from osmocom.utils import rpad
 
 
-VERSION = '3.25.5'
+VERSION = '3.25.6'
 
 MAX_ENVELOPE_SEGMENTS = 5  # max SMS segments for outgoing C-APDU in ENVELOPE
 
@@ -9103,25 +9103,41 @@ class PysimHandler(BaseHTTPRequestHandler):
         elif self.path == '/api/pli-dict':
             body = self._read_body()
             self._log_req(body)
+            invalid, unknown = [], []
             if isinstance(body, dict):
                 for k, v in body.items():
-                    if isinstance(v, str):
+                    if not isinstance(v, str):
+                        invalid.append(k)
+                        continue
+                    try:
+                        code = int(k, 16)
+                    except ValueError:
+                        invalid.append(k)
+                        continue
+                    # a known qualifier - never "an override already exists":
+                    # a new override must stick, and a clear must not poison a
+                    # later set (v3.25.5, live report)
+                    if code not in PLI_QUALIFIER_NAMES:
+                        unknown.append(k)
+                        continue
+                    if v:
                         try:
-                            code = int(k, 16)
-                            # a known qualifier - never "an override already
-                            # exists": a new override must stick, and a clear
-                            # must not poison a later set (v3.25.5, live report)
-                            if code in PLI_QUALIFIER_NAMES:
-                                if v:
-                                    bytes.fromhex(v)      # valid hex only
-                                    _PLI_DATA[code] = v
-                                else:
-                                    # clearing the field restores the default
-                                    _PLI_DATA.pop(code, None)
-                        except (ValueError, KeyError):
-                            pass
+                            bytes.fromhex(v)      # valid hex only
+                        except ValueError:
+                            invalid.append(k)
+                            continue
+                        _PLI_DATA[code] = v
+                    else:
+                        # clearing the field restores the default
+                        _PLI_DATA.pop(code, None)
             resp = {('%02X' % q): (_PLI_DATA.get(q) or PLI_DEFAULTS.get(q, ''))
                     for q in PLI_QUALIFIER_NAMES}
+            # a field the server could not use is named in the response, never
+            # silently dropped (v3.25.6): the PWA shows it under the Save button
+            if invalid:
+                resp['invalid'] = invalid
+            if unknown:
+                resp['unknown'] = unknown
             self._send_json(resp)
             self._log_resp(resp)
         elif self.path == '/api/poll-toggle':