fix: [pdf template] add missing template

Author: Terrtia

var/www/templates/chats_explorer/block_translation_post.html

@@ -0,0 +1,51 @@
+
+<form action="{{ translate_url }}" method='post'>
+    <input type="text" name="id" value="{{obj_id}}" hidden>
+    <div class="card border-secondary">
+        <div class="card-body py-2">
+            <div class="row">
+                <div class="col-md-3 text-center px-0 pt-1">
+                    {% if translation_name %}
+                        {{ translation_name }}
+                    {% else %}
+                        Translation
+                    {% endif %}
+                </div>
+                <div class="col-md-3 text-center pl-0 pt-1">
+                    Source:
+                    <select id="source" name="source" class="form-select" aria-label="Language Source">
+                        {% if not translation_target or translation_target == "Don't Translate" %}
+                            <option selected>Don't Translate</option>
+                        {% else %}
+                            <option selected value="{{ translation_target }}">{{ translation_target }}</option>
+                            <option>Don't Translate</option>
+                        {% endif %}
+                        {% for language in translation_languages %}
+                            <option value="{{ language }}">{{ translation_languages[language] }}</option>
+                        {% endfor %}
+                    </select>
+                </div>
+                <div class="col-md-3 text-center pl-0 pt-1">
+                    Target:
+                    <select id="target" name="target" class="form-select" aria-label="Language Target">
+                        {% if not translation_target or translation_target == "Don't Translate" %}
+                            <option selected>Don't Translate</option>
+                        {% else %}
+                            <option selected value="{{ translation_target }}">{{ translation_target }}</option>
+                            <option>Don't Translate</option>
+                        {% endif %}
+                        {% for language in translation_languages %}
+                            <option value="{{ language }}">{{ translation_languages[language] }}</option>
+                        {% endfor %}
+                    </select>
+                </div>
+                <div class="col-md-3 text-center">
+                    <button class="btn btn-sm btn-primary" type="submit">
+                        <i class="fas fa-language"></i>
+                        <span class="label-icon">Translate</span>
+                    </button>
+                </div>
+            </div>
+        </div>
+    </div>
+</form>