fix: phone leak, field-by-value detection, strict Flamingo email fallback

Three pilot-surfaced issues in one pass:

1. PhoneParser regex used '\s' in the candidate character class, so a
   digit on a following flattened line bled into the phone. '+7977
   6277470\n1' (phone + trailing checkbox value) parsed as 12 digits,
   producing '+797762774701'. Replaced '\s' with a literal space so
   newlines/tabs stop the candidate.

2. Custom-themed forms don't use 'your-name' / 'your-email' keys
   (washanyanya.ru has text-211 / text-212 / name_user). Added
   FieldDetector::find_name + find_email as fallbacks. Classifier
   and MessageFormatter now call them if no standard key matches,
   so 'Александр' in text-211 is recognised as a cyrillic name and
   scored / displayed accordingly.

3. FlamingoHelper copied '_from_email' into 'your-email' without
   validating it. Flamingo derives that meta from whatever field it
   considers "first"; on phone-first forms it ends up holding the
   phone number. Now we only copy _from_email if it contains '@',
   and dropped the _from_name shortcut entirely — FieldDetector
   handles the name via the actual field values.

Tests: +1 FieldDetectorTest (13 cases); +2 PhoneParserTest cases for
newline/tab bleeds; +1 ClassifierTest case; +1 MessageFormatterTest
case for custom field keys. Full suite 53/53 green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

includes/class-classifier.php

@@ -59,7 +59,9 @@ final class Classifier
 
         $text_all = self::concat_fields($fields);
         $name = self::pick_field($fields, ['your-name', 'name', 'имя', 'fio']);
+        if ($name === '') $name = FieldDetector::find_name($fields);
         $email = self::pick_field($fields, ['your-email', 'email', 'e-mail', 'mail']);
+        if ($email === '') $email = FieldDetector::find_email($fields);
         $message = self::pick_field($fields, ['your-message', 'message', 'comment', 'сообщение', 'вопрос']);
 
         $score = 0;

includes/class-field-detector.php

@@ -0,0 +1,56 @@
+<?php
+declare(strict_types=1);
+
+namespace Cf7stg;
+
+/**
+ * Heuristic detection of name/email/etc. when form field keys are not
+ * the standard CF7 ones (your-name, your-email, ...). Used as a fallback
+ * for custom-themed forms where fields are called text-211, name_user,
+ * и т.п.
+ */
+final class FieldDetector
+{
+    /**
+     * Scan values for something that plausibly looks like a human name:
+     * letters (any script), optional spaces/hyphens/apostrophes/dots,
+     * no digits, no URLs, no emails, length 2..80.
+     */
+    public static function find_name(array $fields): string
+    {
+        foreach ($fields as $v) {
+            if (is_array($v)) {
+                $v = implode(' ', array_map('strval', $v));
+            }
+            $v = trim((string)$v);
+            if ($v === '') continue;
+            $len = mb_strlen($v);
+            if ($len < 2 || $len > 80) continue;
+            if (preg_match('/\d/u', $v)) continue;
+            if (preg_match('#https?://|www\.|@#iu', $v)) continue;
+            // Must start with a letter and contain only letter-like characters
+            if (preg_match('/^\p{L}[\p{L}\s\.\-\']{1,79}$/u', $v)) {
+                return $v;
+            }
+        }
+        return '';
+    }
+
+    /**
+     * First value that looks like an email address.
+     */
+    public static function find_email(array $fields): string
+    {
+        foreach ($fields as $v) {
+            if (is_array($v)) {
+                $v = implode(' ', array_map('strval', $v));
+            }
+            $v = trim((string)$v);
+            if ($v === '') continue;
+            if (preg_match('/^\S+@\S+\.\S+$/u', $v)) {
+                return $v;
+            }
+        }
+        return '';
+    }
+}

includes/class-flamingo-helper.php

@@ -56,12 +56,17 @@ final class FlamingoHelper
                 $out[$name] = $val;
             }
         }
-        // Convenience: expose Akismet's "from" name / email so the formatter's
-        // standard slots aren't empty for most submissions.
-        $from_name = (string)get_post_meta($post->ID, '_from_name', true);
+        // Flamingo's "_from_name" and "_from_email" are derived heuristically
+        // from whatever field the plugin considers the "first" — on custom
+        // forms without dedicated email / name fields this produces garbage
+        // (e.g. phone number under _from_email). Only trust _from_email if
+        // it actually looks like an email; _from_name is not trustworthy at
+        // all, so leave it to FieldDetector (run by Classifier / Message-
+        // Formatter) to identify a name from any field value.
         $from_email = (string)get_post_meta($post->ID, '_from_email', true);
-        if ($from_name !== '' && !isset($out['your-name'])) $out['your-name'] = $from_name;
-        if ($from_email !== '' && !isset($out['your-email'])) $out['your-email'] = $from_email;
+        if ($from_email !== '' && strpos($from_email, '@') !== false && !isset($out['your-email'])) {
+            $out['your-email'] = $from_email;
+        }
         return $out;
     }
 

includes/class-message-formatter.php

@@ -35,7 +35,9 @@ final class MessageFormatter
 
         $phone = PhoneParser::parse(self::flatten_fields_for_phone($fields));
         $name = self::pick($fields, ['your-name', 'name', 'имя', 'fio']);
+        if ($name === '') $name = FieldDetector::find_name($fields);
         $email = self::pick($fields, ['your-email', 'email', 'e-mail', 'mail']);
+        if ($email === '') $email = FieldDetector::find_email($fields);
         $message = self::pick($fields, ['your-message', 'message', 'comment', 'сообщение', 'вопрос']);
 
         $lines = [];

includes/class-phone-parser.php

@@ -20,7 +20,12 @@ final class PhoneParser
         // Find a run of digits, spaces, dashes, parens, dots and a leading '+',
         // with at least 10 digits in total. Walk candidates left-to-right and
         // pick the first that yields 10 or 11 digits.
-        if (!preg_match_all('/\+?[\d][\d\s().\-]{8,}/u', $text, $m)) {
+        // NOTE: the space class is a literal ' ' — not '\s'. If '\s' is used
+        // a newline or tab between two adjacent form fields (phone value,
+        // then checkbox value) would bleed into the phone and append extra
+        // digits. MessageFormatter/Classifier flatten fields with "\n" before
+        // calling us, so this matters in practice.
+        if (!preg_match_all('/\+?[\d][\d ().\-]{8,}/u', $text, $m)) {
             return null;
         }