fix(i18n): include CPU name and thread count as variables in translatable string

The CPU row in settings-admin.php previously used a standalone translated
"threads" word with the count concatenated outside the string, which
doesn't work properly for RTL languages or languages with different word
order.

Now uses a single translatable string '%1$s (%2$d threads)' with the CPU
name as %1$s and thread count as %2$d, allowing translators to reorder
components as needed.

Assisted-by: GitHub Copilot (claude-sonnet-4.6)
Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>

Author: Copilot

templates/settings-admin.php

@@ -67,7 +67,7 @@ function FormatMegabytes(int $byte): string {
                             </tr>
                             <tr>
                                 <td><?php p($l->t('CPU:')); ?></td>
-                                <td class="info"><?php p($cpu->getName()) ?></strong> (<?= $cpu->getThreads() ?> <?php p($l->t('threads')); ?>)</td>
+                                <td class="info"><?php p($l->t('%1$s (%2$d threads)', [$cpu->getName(), $cpu->getThreads()])) ?></td>
                             </tr>
                             <?php if ($memory->getMemTotal() > 0): ?>
                             <tr>