Fix settings and env config stuck on loading via SSR form render

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

lib/instance/templates/env_config_panel.html

@@ -1,4 +1,4 @@
-{# env配置：按功能分组，三列卡片布局 #}
+{# env配置：按功能分组，三列卡片布局（SSR 预渲染） #}
 <div class="env-config-page">
     <div class="env-config-head card">
         <h2>env 配置</h2>
@@ -10,7 +10,46 @@
             <span class="settings-status-line" id="env-config-status"></span>
         </div>
     </div>
-    <div id="env-config-grid" class="env-config-grid">
+    <div id="env-config-grid" class="env-config-grid"{% if env_config_groups %} data-env-ssr="1"{% endif %}>
+        {% if env_config_groups %}
+        {% for group in env_config_groups %}
+        <div class="card env-group-card">
+            <h3 class="env-group-title">{{ group.title or '其他' }}</h3>
+            <div class="env-group-fields">
+                {% for field in group.fields %}
+                <div class="env-field-card">
+                    <label class="env-field-label">{{ field.key }}</label>
+                    {% if field.note %}
+                    <div class="env-field-note muted">{{ field.note }}</div>
+                    {% endif %}
+                    {% if field.type == 'bool' %}
+                    <select class="env-field-input" data-env-key="{{ field.key }}">
+                        {% set cur = (field.current or field.default or 'false')|lower %}
+                        <option value="true"{% if cur in ('true', '1', 'yes', 'on') %} selected{% endif %}>true</option>
+                        <option value="false"{% if cur not in ('true', '1', 'yes', 'on') %} selected{% endif %}>false</option>
+                    </select>
+                    {% else %}
+                    <input
+                        class="env-field-input"
+                        type="{% if field.sensitive %}password{% else %}text{% endif %}"
+                        data-env-key="{{ field.key }}"
+                        {% if field.sensitive and field.has_value %}
+                        placeholder="{{ field.masked or '留空不修改' }}"
+                        {% else %}
+                        value="{{ field.current or field.default or '' }}"
+                        {% endif %}
+                    >
+                    {% endif %}
+                    <span class="env-field-badge {% if field.restart_required %}env-badge-restart{% else %}env-badge-hot{% endif %}">
+                        {% if field.restart_required %}需重启{% else %}保存即生效{% endif %}
+                    </span>
+                </div>
+                {% endfor %}
+            </div>
+        </div>
+        {% endfor %}
+        {% else %}
         <div class="env-config-loading muted">加载配置中…</div>
+        {% endif %}
     </div>
 </div>