feat: show force-close badge and countdown when FORCE_CLOSE is enabled

Add shared lib/UI for midnight force-close indicator on instance and hub pages, and document Gate intraday 0-point exit alignment.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/instance/templates/embed_shell.html

@@ -31,6 +31,7 @@
             {% if trade_policy.badge_text %}
             <span class="trade-policy-badge" title="账户交易限制（.env）">{{ trade_policy.badge_text }}</span>
             {% endif %}
+            {% include 'force_close_header_badge.html' %}
             <span class="risk-status-badge risk-status-{{ risk_status.status|default('normal') }}" id="account-risk-badge" role="status" title="{{ risk_status.reason|default('', true) }}" data-status-label="{{ risk_status.status_label|default('正常') }}"{% if risk_status.freeze_until_ms %} data-freeze-until-ms="{{ risk_status.freeze_until_ms }}"{% endif %}>{{ risk_status.status_label|default('正常') }}</span>
             <div class="theme-toggle instance-theme-toggle" role="group" aria-label="界面主题">
                 <button type="button" class="theme-toggle-btn is-active" data-theme-value="dark" aria-pressed="true" title="暗色主题">
@@ -118,7 +119,7 @@
 <script src="/static/instance_ui.js?v=6"></script>
 <script src="/static/journal_upload_slots.js?v=3"></script>
 <script src="/static/instance_records_mobile.js?v=2"></script>
-<script src="/static/time_close_ui.js?v=2"></script>
+<script src="/static/time_close_ui.js?v=3"></script>
 <script src="/static/ai_review_render.js?v=2"></script>
 <script src="/static/form_submit_guard.js?v=2"></script>
 <script src="/static/order_entry_model.js?v=3"></script>