i18n: translate 6 HTML Jinja2 templates with _() calls
Replace all hardcoded English visible text with {{ _("key") }} calls in:
- queue_dashboard.html: headings, stat cards, table headers, empty states
- api_tokens.html: form labels, table headers, status badges, aria-labels
- similarity_dashboard.html: headings, stat labels, controls, empty states
- backup.html: buttons, config labels, table, retention section, confirm dialog
- shared_links.html: form labels/options, table headers, status badges
- duplicates.html: tabs, role tags, near-dup form, explanation bullets
Follows i18n rules: placeholder/aria-label/title attrs translated,
JS strings in <script> left as-is, Alpine.js bindings use Jinja2
server-side evaluation pattern for dynamic translated strings.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
copilot-swe-agent[bot]
64577f2d92