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feat(i18n): add browser-language localization with Jinja2 _() and locale middleware
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Add i18n support to the blog web UI with 4 languages (en/ru/fr/de),
80 translation keys, automatic Accept-Language detection, persistent
locale cookie, and a language switcher dropdown in the header.

- Infrastructure: TranslationService, translation dicts, convenience _()
- Presentation: locale middleware, /web/lang/{locale} switcher route
- Templates: all 9 templates use {{ _(key, current_locale) }}
- Tests: 26 tests across TranslationService, locale detection helpers
- Docs: TEST_MODEL.md and FEATURE_INFRASTRUCTURE.md updated with TC-UNIT-811-821
This commit is contained in:
Сергей Ванюшкин
2026-05-10 16:22:06 +03:00
parent 4e6505c598
commit d32ad29abc
18 changed files with 1077 additions and 100 deletions
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22
app/presentation/templates/pages/post_detail.html
View File

@@ -29,9 +29,9 @@
{{ post.created_at.strftime('%B %d, %Y') }}
</span>
{% if post.published %}
<span class="badge badge-success" data-testid="post-detail-status">Published</span>
<span class="badge badge-success" data-testid="post-detail-status">{{ _('post.status_published', current_locale) }}</span>
{% else %}
<span class="badge" data-testid="post-detail-status">Draft</span>
<span class="badge" data-testid="post-detail-status">{{ _('post.status_draft', current_locale) }}</span>
{% endif %}
</div>
</header>
@@ -54,26 +54,26 @@
<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" style="margin-right: 0.5rem;">
<path d="M10 12L6 8L10 4" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
Back to posts
{{ _('post.back_to_posts', current_locale) }}
</a>
{% if can_edit or can_delete %}
<div class="flex gap-2" data-testid="post-detail-edit-actions">
{% if can_edit %}
<a href="/web/posts/{{ post.slug }}/edit" class="btn" data-testid="btn-edit-post">
<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" style="margin-right: 0.5rem;">
<path d="M11 2L14 5M2 14L3 10L12 1L15 4L6 13L2 14Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
Edit
</a>
<a href="/web/posts/{{ post.slug }}/edit" class="btn" data-testid="btn-edit-post">
<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" style="margin-right: 0.5rem;">
<path d="M11 2L14 5M2 14L3 10L12 1L15 4L6 13L2 14Z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
{{ _('post.edit', current_locale) }}
</a>
{% endif %}
{% if can_delete %}
<form action="/web/posts/{{ post.slug }}/delete" method="POST" style="display: inline;" data-testid="form-delete-post">
<button type="submit" class="btn btn-danger" data-testid="btn-delete-post" onclick="return confirm('Are you sure you want to delete this post?');">
<button type="submit" class="btn btn-danger" data-testid="btn-delete-post" onclick="return confirm('{{ _('post.delete_confirm', current_locale) }}');">
<svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" style="margin-right: 0.5rem;">
<path d="M2 4h12M6 4V2a2 2 0 012-2h0a2 2 0 012 2v2m3 0v10a2 2 0 01-2 2H5a2 2 0 01-2-2V4h9z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
</svg>
Delete
{{ _('post.delete', current_locale) }}
</button>
</form>
{% endif %}