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i18n: live-swap chat sidebar labels on language toggle

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The strategic log content already refreshes via HTMX on lang-changed
(server-side translation lookup), but the chat sidebar's static labels
— title, hint, helper lede, textarea placeholder, Send button — were
baked into the HTML by Jinja at page render and only updated after a
full reload.

Add a tiny client-side i18n dictionary (CASSANDRA_I18N) plus
applyI18n(lang) in base.html. cassandraSetLang() now calls
applyI18n(newLang) right after the language PATCH succeeds and before
firing the HTMX triggers, so labels swap in step with the AI content.

Convention: <element data-i18n="key">…</element> sets textContent;
<input data-i18n-placeholder="key" …> sets .placeholder. Initial
render still goes through the existing {% if user_lang == 'it' %}
Jinja blocks so there's no flash of English on page load for IT users
— applyI18n is a no-op until the toggle is clicked.

Only the chat sidebar has bindings today. Adding more labels later is
a matter of dropping a key into the dict and tagging the element.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Giorgio Gilestro 2026-05-29 12:01:28 +02:00
parent 48f022b71b
commit fca05aef7a
2 changed files with 41 additions and 15 deletions
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20
app/templates/log.html
View file

@ -33,28 +33,18 @@
{% if paid %}
<aside id="chat-sidebar" class="log-page__chat">
<div class="chat-header">
<span class="chat-title">{% if user_lang == 'it' %}Chiedi a Cassandra{% else %}Ask Cassandra{% endif %}</span>
<span class="chat-hint">{% if user_lang == 'it' %}basato sull'ultimo log + dati in tempo reale{% else %}grounded on the latest log + live data{% endif %}</span>
<span class="chat-title" data-i18n="chat.title">{% if user_lang == 'it' %}Chiedi a Cassandra{% else %}Ask Cassandra{% endif %}</span>
<span class="chat-hint" data-i18n="chat.hint">{% if user_lang == 'it' %}basato sull'ultimo log + dati in tempo reale{% else %}grounded on the latest log + live data{% endif %}</span>
</div>
<div id="chat-thread" class="chat-thread">
<div class="chat-msg chat-msg--system">
{% if user_lang == 'it' %}
Fai domande sull'analisi di oggi. Il modello vede l'ultimo log
strategico, le quotazioni di mercato in tempo reale per tutti i
gruppi e le ultime 24h di titoli filtrati per tesi. Un refresh
della pagina cancella questa conversazione.
{% else %}
Ask about today's analysis. The model sees the latest strategic log,
live market readings across all groups, and the last 24h of
thesis-filtered headlines. Refresh wipes this conversation.
{% endif %}
</div>
<div class="chat-msg chat-msg--system" data-i18n="chat.lede">{% if user_lang == 'it' %}Fai domande sull'analisi di oggi. Il modello vede l'ultimo log strategico, le quotazioni di mercato in tempo reale per tutti i gruppi e le ultime 24h di titoli filtrati per tesi. Un refresh della pagina cancella questa conversazione.{% else %}Ask about today's analysis. The model sees the latest strategic log, live market readings across all groups, and the last 24h of thesis-filtered headlines. Refresh wipes this conversation.{% endif %}</div>
</div>
<form id="chat-form" class="chat-form" autocomplete="off">
<textarea id="chat-input" rows="2"
data-i18n-placeholder="chat.placeholder"
placeholder="{% if user_lang == 'it' %}es. perché il comparto difesa è piatto nonostante Hormuz?{% else %}e.g. why is the defence sleeve flat through Hormuz?{% endif %}"
required></textarea>
<button id="chat-send" type="submit">{% if user_lang == 'it' %}Invia{% else %}Send{% endif %}</button>
<button id="chat-send" type="submit" data-i18n="chat.send">{% if user_lang == 'it' %}Invia{% else %}Send{% endif %}</button>
</form>
</aside>
{% else %}