Refactor templates for audiobook preparation and settings

- Updated navigation in base.html to include a link to the queue section.
- Modified index.html to change step labels and added a jobs panel for real-time updates.
- Enhanced prepare_job.html with a wizard-style step navigation and improved speaker configuration options.
- Added new fields for speaker analysis settings and chapter options in prepare_job.html.
- Introduced a voice selection modal for better user experience in speaker selection.
- Updated settings.html to allow selection of randomizer languages for speakers.
- Cleaned up speakers.html by removing unnecessary language selection fields and ensuring consistency in speaker configuration.

abogen/web/templates/settings.html

@@ -102,6 +102,16 @@
           {% endfor %}
         </select>
       </div>
+      <div class="field">
+        <label for="speaker_random_languages">Randomizer Languages</label>
+        {% set selected_languages = settings.speaker_random_languages or [] %}
+        <select id="speaker_random_languages" name="speaker_random_languages" multiple size="6">
+          {% for code, label in options.languages.items() %}
+          <option value="{{ code }}" {% if code in selected_languages %}selected{% endif %}>{{ label }} ({{ code|upper }})</option>
+          {% endfor %}
+        </select>
+        <p class="hint">Limits random voice selection for speakers marked as random. Leave unused to allow any language.</p>
+      </div>
       <div class="field">
         <label for="speaker_analysis_threshold">Speaker Analysis Minimum Mentions</label>
         <input type="number" min="1" max="25" id="speaker_analysis_threshold" name="speaker_analysis_threshold" value="{{ settings.speaker_analysis_threshold }}">