v3.21.0: the test-runner tolerance batch + the proactive cleanup action

Five reported issues, plus the action that makes an explicit drain possible:

- on_fail is honoured by every step failure: an expectation with no pending
  command (or a FETCH that returns nothing) fails as a Command/Fetch check at
  the step's level instead of raising past it; the default still stops the
  run, on_fail "warning" continues (the tolerant consume-if-pending form).
- the run cleanup answers ok (0x00) and keeps draining while the TR answers
  91XX (bounded); a cancel is only sent when a script asks for it - it tells
  the card the user aborted the session and pushes assertive applets onto an
  error path.
- new `proactive` action: STATUS rounds consume every announced command
  (respond/first TERMINAL RESPONSE results, attempts/interval_ms bound) until
  the card answers 9000; an optional require asserts at least one drained
  command (an empty drain fails it), the final SW is the step's SW check and
  a still-pending command is handed to the next step.  PWA editor + summary +
  validation, EN/RU help, docs, action-kind drift test.
- the PoR response form follows the command's TAR: _tar_is_rm (preset role
  entries + the TS 101 220 Annex D ISD/RFM allocations) decides; a non-RM
  TAR's reply is always raw (TS 102 226 4) - no fabricated status word even
  when the bytes happen to parse (01 00 0B 91 ... used to read as SW 000B).
- a secured data too short for the compact structure (a 2-byte applet reply)
  is recovered by _por_header_parse (the decode minus the compact parse; a
  malformed packet or a failed RC/CC/DS check still yields no por) and
  reported raw, so short applet replies are assertable via por.data.

Docs: test-scripts.md, api.md, help EN/RU, repo AGENTS.  sw cache simple-v396.
Tests: 825 frontend + 755 Python green.
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<h3 id="test-script" class="text-lg font-medium mb-2">8.9 Test script</h3>
<p class="text-sm mb-2">A <strong>test script</strong> is an ordered list of <strong>actions</strong> and proactive-command <strong>expectations</strong> executed server-side on the equipped card. While a run is active the card belongs to the script: other card actions are refused (HTTP&nbsp;409) and background STATUS polling is paused; the run report is kept in memory (also after reloading the page) until <strong>Clear report</strong>. Scripts live in the <strong>server-side store</strong> (<code class="font-mono text-sm">~/.pysim-simple-server/test_scripts.json</code>, <code class="font-mono text-sm">--test-scripts</code>), so every browser manages the same set; edits are written to the store as you change them (there is no Save button &mdash; a draft without a valid step stays local until it is valid); JSON export/import remains for backup and for moving scripts between benches (the old localStorage export imports as-is).</p>
<ul class="list-disc list-inside text-sm space-y-1 mb-3">
<li><strong>Actions</strong> &mdash; <em>Envelope</em> (Event Download: raw event type + data, with an optional source override &mdash; 82 terminal / 83 network) or <em>Event</em> (the semantic forms: Location status, Access technology change, Network rejection, Data connection status change &mdash; the fields are edited as a JSON object in the step editor, and the Phone tab's event form shows the built hex for the other events), <em>Menu Selection</em> (item id 1&ndash;255, or the item's text with an exact/contains match, case-insensitive by default &mdash; the step editor's <em>Match case</em> choice switches to an exact-case match; the text is resolved against the card's menu, which follows the applet's install parameters), <em>UPDATE/READ file</em> (path + mode; reads verify the file data), <em>raw APDU</em> (no auto-handler), <em>SCP80</em> (C-APDU or a pre-built secured packet, optional keyset number (kvn) / TAR / SPI1 / SPI2 overrides and a command format &mdash; compact, or the TS 102 226 &sect;5.2.1 Command Scripting template <em>expanded</em> (AA) / <em>expanded AE&nbsp;80</em> around the C-APDU; the keys and the counter come from the card preset matched by the equipped card's ICCID &mdash; the run names the stored preset, so it always uses its keysets, TARs and counter &mdash; and the counter is written back to it after the run) and <em>STATUS</em> (with <em>attempts</em> &gt; 1 it polls until the card announces a command). Every action has a response check: expected SW and data (exact, or a mask with <code class="font-mono text-sm">?</code> nibble wildcards &mdash; <code class="font-mono text-sm">91??</code>) plus a PoR check for SCP80 (<em>any / no PoR / por_ok</em>, or a custom assertion of the decoded PoR &mdash; status / SW / data; the SEND SHORT MESSAGE transport works the same).</li>
<li><strong>Expectations</strong> &mdash; the card must have announced a proactive command in the previous step (SW <code class="font-mono text-sm">91XX</code>, TS 102 221 &sect;7.4.2.1 / TS 102 223 &sect;6.3); a <code class="font-mono text-sm">9000</code> means &ldquo;no command&rdquo; and is an error &mdash; add a STATUS action when the applet delivers on poll. The command type, qualifier and contents are verified: text / item / raw checks, an <em>Alpha</em> check (the command's Alpha identifier, tag <code class="font-mono text-sm">05</code>/<code class="font-mono text-sm">85</code> &mdash; distinct from the <code class="font-mono text-sm">8D</code> text string), an <em>SMS TPDU</em> check (the submit TPDU of a SEND SHORT MESSAGE: destination / PID / DCS / UDL / user data &mdash; for an applet's own SMS), a <em>PoR</em> check (a SEND SHORT MESSAGE carries the PoR when the packet requested PoR-in-submit, SPI2 bit <code class="font-mono text-sm">20</code>: the response status, the R-APDU SW and the response data; make sure an SCP80 step ran first &mdash; the R-APDU SW lives <em>inside</em> the response payload: an applet's own TAR returns application data, so check its data and leave the SW empty; a refused ENVELOPE (<code class="font-mono text-sm">62XX</code>/<code class="font-mono text-sm">63XX</code>) may carry no response packet at all &mdash; leave the PoR check at <em>any</em> or expect <em>no PoR</em> for such a step) and a <em>Files</em> check (the File List of a REFRESH, e.g. qualifier <code class="font-mono text-sm">00</code> = NAA initialization with full file change notification). The scripted <strong>TERMINAL RESPONSE</strong> (result, item identifier, text, extra TLVs) is part of the instruction.</li>
<li><strong>Fail levels</strong> &mdash; a mismatch flags the step as <em>Error</em> (terminates the script) or <em>Warning</em> (continues); each check is reported with expected vs actual values.</li>
<li><strong>Actions</strong> &mdash; <em>Envelope</em> (Event Download: raw event type + data, with an optional source override &mdash; 82 terminal / 83 network) or <em>Event</em> (the semantic forms: Location status, Access technology change, Network rejection, Data connection status change &mdash; the fields are edited as a JSON object in the step editor, and the Phone tab's event form shows the built hex for the other events), <em>Menu Selection</em> (item id 1&ndash;255, or the item's text with an exact/contains match, case-insensitive by default &mdash; the step editor's <em>Match case</em> choice switches to an exact-case match; the text is resolved against the card's menu, which follows the applet's install parameters), <em>UPDATE/READ file</em> (path + mode; reads verify the file data), <em>raw APDU</em> (no auto-handler), <em>SCP80</em> (C-APDU or a pre-built secured packet, optional keyset number (kvn) / TAR / SPI1 / SPI2 overrides and a command format &mdash; compact, or the TS 102 226 &sect;5.2.1 Command Scripting template <em>expanded</em> (AA) / <em>expanded AE&nbsp;80</em> around the C-APDU; the keys and the counter come from the card preset matched by the equipped card's ICCID &mdash; the run names the stored preset, so it always uses its keysets, TARs and counter &mdash; and the counter is written back to it after the run), <em>STATUS</em> (with <em>attempts</em> &gt; 1 it polls until the card announces a command) and <em>Proactive cleanup</em> (poll STATUS and consume every announced command &mdash; the TERMINAL RESPONSE result for each, optionally a different result for the first; the attempt/interval bound; an optional <em>require</em> assertion over what was drained. An empty poll passes, the final STATUS must be idle, and a still-pending command is handed to the next step &mdash; use it at the start, in the middle or at the end of a script to make sure the card has stopped sending). Every action has a response check: expected SW and data (exact, or a mask with <code class="font-mono text-sm">?</code> nibble wildcards &mdash; <code class="font-mono text-sm">91??</code>) plus a PoR check for SCP80 (<em>any / no PoR / por_ok</em>, or a custom assertion of the decoded PoR &mdash; status / SW / data; the SEND SHORT MESSAGE transport works the same).</li>
<li><strong>Expectations</strong> &mdash; the card must have announced a proactive command in the previous step (SW <code class="font-mono text-sm">91XX</code>, TS 102 221 &sect;7.4.2.1 / TS 102 223 &sect;6.3); a <code class="font-mono text-sm">9000</code> means &ldquo;no command&rdquo;: the step fails at its fail level &mdash; Error stops the script, Warning continues (the tolerant &ldquo;consume a command if there is one&rdquo; form) &mdash; and a STATUS action with <em>attempts</em> &gt; 1 polls when the applet delivers on poll. The command type, qualifier and contents are verified: text / item / raw checks, an <em>Alpha</em> check (the command's Alpha identifier, tag <code class="font-mono text-sm">05</code>/<code class="font-mono text-sm">85</code> &mdash; distinct from the <code class="font-mono text-sm">8D</code> text string), an <em>SMS TPDU</em> check (the submit TPDU of a SEND SHORT MESSAGE: destination / PID / DCS / UDL / user data &mdash; for an applet's own SMS), a <em>PoR</em> check (a SEND SHORT MESSAGE carries the PoR when the packet requested PoR-in-submit, SPI2 bit <code class="font-mono text-sm">20</code>: the response status, the R-APDU SW and the response data; make sure an SCP80 step ran first &mdash; the R-APDU SW lives <em>inside</em> the response payload: an applet's own TAR returns application data, so check its data and leave the SW empty; a refused ENVELOPE (<code class="font-mono text-sm">62XX</code>/<code class="font-mono text-sm">63XX</code>) may carry no response packet at all &mdash; leave the PoR check at <em>any</em> or expect <em>no PoR</em> for such a step) and a <em>Files</em> check (the File List of a REFRESH, e.g. qualifier <code class="font-mono text-sm">00</code> = NAA initialization with full file change notification). The scripted <strong>TERMINAL RESPONSE</strong> (result, item identifier, text, extra TLVs) is part of the instruction.</li>
<li><strong>Fail levels</strong> &mdash; a mismatch flags the step as <em>Error</em> (terminates the script) or <em>Warning</em> (continues); every step failure honours it, including an expectation that finds no pending command; each check is reported with expected vs actual values.</li>
<li><strong>Templates</strong> &mdash; Empty, <em>STK menu browsing</em>, <em>Applet via SCP80</em>; the step editor is form-based (the event action's fields are a JSON object) and individual scripts export/import as JSON.</li>
</ul>
<p class="text-sm mb-3">Every step logs a semantic line to the server log under its step number (<code class="font-mono text-sm">TEST-RUN step N: …</code>), request before response: the APDU/data sent and the SW received, for SCP80 the plaintext C-APDU, the built secured packet and the PoR's R-APDU, for an expectation the FETCH / command / TERMINAL RESPONSE trio, and for a menu selection the complete ENVELOPE with the resolved item. Start the server with <code class="font-mono text-sm">--apdu-trace</code> to add the raw transport APDU log as well.</p>
<p class="text-sm mb-3">Every step logs a semantic line to the server log under its step number (<code class="font-mono text-sm">TEST-RUN step N: …</code>), request before response: the APDU/data sent and the SW received, for SCP80 the plaintext C-APDU, the built secured packet and the PoR's R-APDU, for an expectation the FETCH / command / TERMINAL RESPONSE trio, a proactive cleanup every STATUS/FETCH/command/TR round and the run cleanup the commands it drained (answered <code class="font-mono text-sm">ok</code> &mdash; a cancel is only sent when a script asks for it), and for a menu selection the complete ENVELOPE with the resolved item. Start the server with <code class="font-mono text-sm">--apdu-trace</code> to add the raw transport APDU log as well.</p>
<h3 id="bip" class="text-lg font-medium mb-2">8.10 BIP terminal (generic TCP)</h3>
<p class="text-sm mb-2">The <strong>BIP</strong> pill runs the terminal side of the Bearer Independent Protocol for cards that use TCP without HTTP OTA (SCP81): an applet or a push trigger can open a channel and exchange raw data. Only one BIP session runs at a time &mdash; starting here stops a running SCP81 listener, and starting the SCP81 listener stops this session (both report what was replaced).</p>