v3.27.0: the outfile import

Import many card presets at once from a card vendor's plain-text dump.
The new pure pysim_simple_server/outfile.py (parse_outfile) plus
POST /api/presets/import-outfile: without `mode` the call is a dry-run
preview returning the parsed presets and a report (nothing is stored),
with `merge`/`replace` the same parse runs and the presets go through
the preset store.

The parser: the data starts at the first line whose whitespace tokens
all look like column names and include ICCID (a leading `word:` prefix
is stripped, so a `var_out:IMSI ICCID ...` header line matches while a
config line naming a value - `ICCID:897...` or `ICCID 897...` - cannot);
one row per card follows.  Recognised columns (case-insensitive): ICCID,
PIN1/PIN2, PUK1/PUK2, ADM (the ASCII string, hex-encoded), PSK (32 hex;
an optional PSKID/PSK_ID names the identity, defaulting to the card's
ICCID) and KICn/KIDn - one keyset per numbered pair, up to 15;
IMSI*/EKI/KIKn are ignored.  The KIc/KID bytes are inferred: the keyset
number is the column number, the algorithm nibble follows the key size
(8 B DES, 16 B 3DES2 or AES - the preview's choice, 3DES2 default,
24 B 3DES3; anything else skips the keyset with a note), both bytes
carrying the same number (TS 102 225 A.2).  The TARs never come from the
file: the caller's table (default the three role entries) is applied
with one global default keyset written into every entry (the card's
first keyset when unset).  An invalid optional code is dropped with a
report line instead of failing the card; the report names the columns,
the rows read, the parsed keysets and every skip.

The ICCID normaliser fix (both sides, drift-guarded): the trailing F
(or Fs) is the odd-nibble padding - when the rest is digits only it is
the plain digit form (the vendors print the ICCID as digits+F),
otherwise the value is the raw nibble-swapped EF hex; a raw value never
ends in F, so the rule is unambiguous.

PWA: the Import outfile button in the Cards list, the hidden file input
and the preview panel (the common name, the 16-byte algorithm select,
the TAR table with the role defaults editable and + TAR / remove for
extras, the global default keyset select over the parsed keysets, the
merge/replace mode, the parsed cards table, the report, Refresh
preview, Import).  The panel joins refreshDynamicI18n for the language
switch.

Docs: help EN/RU (the term outfile stays untranslated in RU), api.md's
new section, the repo AGENTS.  Tests: the parser (both fixture shapes,
the column detection, the key-size inference, the options/TAR table,
the PSK identity, the skips, the store round-trip), the endpoint (the
preview, the import, the duplicate skip, the 400s), the normaliser on
both sides, the PWA helpers/wiring and the algorithm16 drift guard
against outfile.py.  904 frontend + 903 Python; sw cache simple-v436.

frontend/help.html

@@ -367,6 +367,7 @@
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 	<p class="text-sm mb-3">The <strong>SCP81</strong> column shows whether the preset supplies a usable PSK pair: <strong>&#10003;</strong> (green) — identity and key set; <strong>&#9888;</strong> (amber) — only one of the two, so the listener ignores the preset; <strong>&mdash;</strong> — no PSK. PSK identity and key must be set together. <strong>Add preset</strong> opens the editor with a fresh preset; <strong>Edit</strong> loads the row's preset into it so fields can be changed without re-entering the card; <strong>Save</strong> stores it and returns to the list, <strong>Cancel</strong> discards the edits; <strong>Remove</strong> deletes the row (list only). Presets can be shared with <strong>Export to file</strong> and restored with <strong>Import from file</strong>. The selected card preset auto-fills the Secured Packet form and sets the TAR for the operation (RAM/GP &rarr; ISD TAR, SIM RFM &rarr; UICC RFM TAR, USIM RFM &rarr; ADF RFM TAR); a TAR typed into the Secured Packet form by hand is kept when sending - the counter, keys and the TAR's MSL are still re-read from the preset; the SPI1 is seeded from the TAR's MSL and a lower value warns (the server returns it as a <code class="font-mono text-sm">warning</code> too); edits are pushed into a running SCP81 listener automatically.</p>
+	<p class="text-sm mb-3"><strong>Import outfile</strong> imports many cards at once from a card vendor's <em>outfile</em> — the personalization tool's plain-text dump: a banner and a configuration header, then a whitespace-separated <strong>column line</strong> (the tokens include <code class="font-mono text-sm">ICCID</code>; the first token may carry a <code class="font-mono text-sm">var_out:</code>-style prefix) and one row per card. Everything before the column line and every unused column is ignored. The parser reads <code class="font-mono text-sm">ICCID</code> (digits, the digits with an odd-nibble <code class="font-mono text-sm">F</code> pad, spaced digits or the raw EF hex — all normalised to one form), <code class="font-mono text-sm">PIN1</code>/<code class="font-mono text-sm">PIN2</code>/<code class="font-mono text-sm">PUK1</code>/<code class="font-mono text-sm">PUK2</code>, <code class="font-mono text-sm">ADM</code> (the ASCII string, hex-encoded — <code class="font-mono text-sm">3632333239463337</code> is <code class="font-mono text-sm">62329F37</code>), <code class="font-mono text-sm">PSK</code> (16 bytes; an optional <code class="font-mono text-sm">PSKID</code>/<code class="font-mono text-sm">PSK_ID</code> names its identity, defaulting to the card's ICCID) and the numbered key pairs <code class="font-mono text-sm">KICn</code>/<code class="font-mono text-sm">KIDn</code> — one keyset per pair, up to 15. The <strong>KIc/KID bytes are never in the file</strong>: the keyset number is the column number (<code class="font-mono text-sm">KIC2</code> &rarr; keyset 2) and the algorithm nibble follows the key size — 8 bytes DES, 24 bytes 3DES3, and for <strong>16 bytes</strong> the preview's choice, <strong>3DES2</strong> (default) or <strong>AES</strong>; any other size skips that keyset with a note. The TARs never come from the file either: the preview shows the TAR table the imported cards get (the three role entries with their spec TARs and MSL 16 by default, editable, with <strong>+ TAR</strong> for extra entries) and one <strong>default keyset</strong> applied to every TAR entry — required for a card with several keysets (a non-zero MSL must name a keyset). A <strong>common name</strong> is applied to every imported card (empty falls back to the ICCID); <strong>Import mode</strong> chooses <strong>Merge</strong> (default — existing presets are kept, duplicate ICCIDs are skipped and reported) or <strong>Replace</strong> (the store is wiped first). The preview lists the parsed cards (ICCID, keysets, the codes found) and every skipped row/key with its reason before anything is stored.</p>
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