fix(ticket): flatten TicketRepository traits to PSR-4-visible paths

TicketRepository fatalled on /user/tickets/ with "Trait AKSRT\Ticket\TicketQuery
not found". src/ classes load only via Composer PSR-4 (AKSRT\ => src/) — there is
no bootstrap require list for them — so the autoloader resolved the traits by
namespace to src/Ticket/TicketQuery.php and src/Ticket/TicketStatus.php. Both
files actually sat in src/Ticket/TicketRepository-traits/, one level deeper, and
were therefore invisible: PHP hit the `use` statement with no trait declared and
died the moment the repository compiled.

The nested directory name imitated the old inc/classes/**/*-traits/ layout, which
only worked because inc/bootstrap.php carried an explicit require_once for every
one of those files. No such mechanism exists under src/. Move both traits up to
sit flat as siblings of the class that uses them — the same shape as
GlobalControllerPart1, ModerationPart1 and the rest of src/. No code changes
inside the traits; their namespace was already correct.

Add tools/audit-psr4-paths.php, which checks every symbol under src/ against the
path Composer maps it to and exits 1 on mismatch. It flags this exact layout, so
the nesting cannot come back unnoticed. Document it in CLAUDE.md next to the
existing admin-contract audit.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/Ticket/TicketRepository.php

@@ -133,6 +133,8 @@ final class TicketRepository {
 
     /* ------------------------------------------------------------------ *
      * 状态机（对外入口，内部规则在 TicketStatus trait）
+     *
+     * Trait 必须与宿主类同级平铺：PSR-4 按命名空间寻址，不解析子目录。
      * ------------------------------------------------------------------ */
 
     /**

tools/audit-psr4-paths.php

@@ -0,0 +1,76 @@
+<?php
+/**
+ * PSR-4 path audit — every symbol under src/ must sit at the path Composer maps.
+ *
+ * Catches the fatal "Trait ... not found" class of bug: a trait (or class) nested
+ * in a `*-traits/` subdirectory is invisible to PSR-4, which resolves by
+ * namespace alone and never scans subdirectories. src/ classes load via
+ * `AKSRT\ => src/` (composer.json) — no bootstrap require list — so a misplaced
+ * file loads nowhere and fatals the moment its host class compiles.
+ *
+ * Usage (from theme root):
+ *   php tools/audit-psr4-paths.php
+ *
+ * Exit 1 on hard errors.
+ */
+
+declare(strict_types=1);
+
+$themeRoot = dirname(__DIR__);
+$srcRoot = $themeRoot . '/src';
+$prefix = 'AKSRT';
+
+$rii = new RecursiveIteratorIterator(
+    new RecursiveDirectoryIterator($srcRoot, FilesystemIterator::SKIP_DOTS)
+);
+
+$files = [];
+foreach ($rii as $file) {
+    if ($file->isFile() && strtolower($file->getExtension()) === 'php') {
+        $files[] = $file->getPathname();
+    }
+}
+sort($files);
+
+$problems = [];
+foreach ($files as $path) {
+    $src = (string) file_get_contents($path);
+
+    if (!preg_match('/^\s*namespace\s+([^;]+);/m', $src, $nsMatch)) {
+        continue;
+    }
+    $namespace = trim($nsMatch[1]);
+    if (!str_starts_with($namespace, $prefix . '\\')) {
+        continue;
+    }
+
+    if (!preg_match('/^\s*(?:final\s+|abstract\s+|readonly\s+)*(?:class|interface|trait|enum)\s+(\w+)/m', $src, $symMatch)) {
+        continue;
+    }
+    $symbol = $symMatch[1];
+
+    $relative = str_replace('\\', '/', substr($namespace, strlen($prefix)));
+    $expected = str_replace('//', '/', $srcRoot . $relative . '/' . $symbol . '.php');
+
+    if (realpath($expected) !== realpath($path)) {
+        $problems[] = sprintf(
+            "%s declares %s\\%s -> expected %s",
+            str_replace('\\', '/', substr($path, strlen($srcRoot) + 1)),
+            $namespace,
+            $symbol,
+            str_replace('\\', '/', substr($expected, strlen($srcRoot) + 1))
+        );
+    }
+}
+
+foreach ($problems as $problem) {
+    fwrite(STDERR, '[error] ' . $problem . PHP_EOL);
+}
+fwrite(STDERR, sprintf(
+    'scanned=%d errors=%d%s',
+    count($files),
+    count($problems),
+    PHP_EOL
+));
+
+exit($problems === [] ? 0 : 1);