feat(agent): 移除control_node实例化，新增系统节点命名与人设管理前端

当前阶段只保留regulatory+consciousness两个系统节点，control_node代码保留但不再实例化。
系统节点新增display_name字段支持自定义显示名称，前端新增人设管理Tab支持模板CRUD。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/src/components/Agent/WorkerIndividualSettings.tsx

@@ -51,15 +51,17 @@ export function WorkerIndividualSettings() {
       const providersList = Object.values(provRes.data.provider_list || {}) as Provider[];
       const defaultProvider = providersList.length > 0 ? providersList[0].provider_title : '';
       const sysNodesData = sysRes.data.system_nodes || [];
-      const defaultSysNodes = ['regulatory_node', 'consciousness_node', 'control_node'];
+      const defaultSysNodes = ['regulatory_node', 'consciousness_node'];
 
       setSystemNodes(defaultSysNodes.map(nodeName => {
         const found = sysNodesData.find((n: any) => n.node_name === nodeName);
         return {
           agent_id: nodeName, agent_name: nodeName, agent_type: 'System Node',
+          display_name: found?.display_name || '',
           provider_title: found?.provider_title || defaultProvider,
           model_id: found?.model_id || '',
           tools: found?.tools ? JSON.stringify(found.tools) : '[]',
+          custom_system_prompt: found?.custom_system_prompt || '',
           is_system: true
         };
       }));
@@ -109,7 +111,9 @@ export function WorkerIndividualSettings() {
           individual_name: editData.agent_name,
           provider_title: editData.provider_title,
           model_id: editData.model_id,
-          tools: JSON.parse(editData.tools || '[]')
+          tools: JSON.parse(editData.tools || '[]'),
+          custom_system_prompt: (editData as any).custom_system_prompt || null,
+          display_name: (editData as any).display_name || null
         });
       } else {
         const payload = {
@@ -184,7 +188,10 @@ export function WorkerIndividualSettings() {
                       <div className="w-7 h-7 rounded-lg bg-accent-light flex items-center justify-center">
                         <Bot size={14} className="text-accent" />
                       </div>
-                      <span className="font-medium text-text-primary text-xs">{w.agent_name}</span>
+                      <div className="flex flex-col">
+                        <span className="font-medium text-text-primary text-xs">{w.display_name || w.agent_name}</span>
+                        {w.display_name && <span className="text-[10px] text-text-muted">{w.agent_name}</span>}
+                      </div>
                     </div>
                   </td>
                   <td className="px-5 py-3">{getTypeBadge(w.agent_type, true)}</td>
@@ -228,9 +235,13 @@ export function WorkerIndividualSettings() {
             <form onSubmit={handleModalSave} className="p-5 space-y-4">
               <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                 <div>
-                  <label className="block text-xs font-semibold text-text-secondary mb-1.5 uppercase tracking-wider">{t('agent.name')}</label>
-                  <input type="text" required value={editData.agent_name || ''} onChange={(e) => setEditData({...editData, agent_name: e.target.value})}
-                    className="w-full px-3 py-2 bg-bg-input border border-border-primary rounded-xl text-sm text-text-primary focus:outline-none focus:ring-2 focus:ring-accent/20 focus:border-accent" disabled={(editData as any).is_system} />
+                  <label className="block text-xs font-semibold text-text-secondary mb-1.5 uppercase tracking-wider">{(editData as any).is_system ? t('agent.displayName') : t('agent.name')}</label>
+                  <input type="text" required={!(editData as any).is_system} value={(editData as any).is_system ? ((editData as any).display_name || '') : (editData.agent_name || '')} onChange={(e) => {
+                    if ((editData as any).is_system) setEditData({...editData, display_name: e.target.value} as any);
+                    else setEditData({...editData, agent_name: e.target.value});
+                  }}
+                    placeholder={(editData as any).is_system ? editData.agent_name : ''}
+                    className="w-full px-3 py-2 bg-bg-input border border-border-primary rounded-xl text-sm text-text-primary focus:outline-none focus:ring-2 focus:ring-accent/20 focus:border-accent" />
                 </div>
                 <div>
                   <label className="block text-xs font-semibold text-text-secondary mb-1.5 uppercase tracking-wider">{t('agent.type')}</label>
@@ -267,6 +278,14 @@ export function WorkerIndividualSettings() {
                   })()}
                 </div>
               </div>
+              {(editData as any).is_system && (
+                <div>
+                  <label className="block text-xs font-semibold text-text-secondary mb-1.5 uppercase tracking-wider">{t('agent.customPrompt')}</label>
+                  <textarea value={(editData as any).custom_system_prompt || ''} onChange={(e) => setEditData({...editData, custom_system_prompt: e.target.value} as any)} rows={3}
+                    placeholder={t('agent.customPromptPlaceholder')}
+                    className="w-full px-3 py-2 bg-bg-input border border-border-primary rounded-xl text-sm text-text-primary font-mono focus:outline-none focus:ring-2 focus:ring-accent/20 focus:border-accent" />
+                </div>
+              )}
               {!(editData as any).is_system && (
                 <>
                   <div>