feat(ui): add ButlerPanel — pain points, proposals, memory insights

- Add Butler types (PainPoint, Proposal, DelegationResult) to viking-client.ts
- Add butler API functions: getButlerInsights, getButlerProposals,
  recordButlerPainPoint, generateButlerSolution, updateButlerProposalStatus,
  butlerDelegateTask
- Create ButlerPanel with three sections:
  - InsightsSection: pain point cards with evidence chain, severity, confidence
  - ProposalsSection: solution cards with accept/reject actions
  - MemorySection: Viking memory entries per agent
- Create useButlerInsights hook for data fetching
- Add "管家" tab to RightPanel with ConciergeBell icon

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src/components/ButlerPanel/index.tsx

@@ -0,0 +1,60 @@
+import { useButlerInsights } from '../../hooks/useButlerInsights';
+import { InsightsSection } from './InsightsSection';
+import { ProposalsSection } from './ProposalsSection';
+import { MemorySection } from './MemorySection';
+
+interface ButlerPanelProps {
+  agentId: string | undefined;
+}
+
+export function ButlerPanel({ agentId }: ButlerPanelProps) {
+  const { painPoints, proposals, loading, error, refresh } = useButlerInsights(agentId);
+
+  if (!agentId) {
+    return (
+      <div className="flex items-center justify-center h-full">
+        <p className="text-sm text-gray-500 dark:text-gray-400">请先选择一个 Agent</p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-6">
+      {error && (
+        <div className="rounded-lg bg-red-50 dark:bg-red-900/20 border border-red-200 dark:border-red-800 px-3 py-2 text-xs text-red-700 dark:text-red-300">
+          {error}
+        </div>
+      )}
+
+      {loading && (
+        <div className="flex items-center justify-center py-4">
+          <div className="w-5 h-5 border-2 border-gray-300 dark:border-gray-600 border-t-blue-500 rounded-full animate-spin" />
+        </div>
+      )}
+
+      {/* Insights section */}
+      <div>
+        <h3 className="text-sm font-semibold text-gray-900 dark:text-gray-100 mb-2">
+          我最近在关注
+        </h3>
+        <InsightsSection painPoints={painPoints} />
+      </div>
+
+      {/* Proposals section */}
+      <div>
+        <h3 className="text-sm font-semibold text-gray-900 dark:text-gray-100 mb-2">
+          我提出的方案
+        </h3>
+        <ProposalsSection proposals={proposals} onStatusChange={refresh} />
+      </div>
+
+      {/* Memory section */}
+      <div>
+        <h3 className="text-sm font-semibold text-gray-900 dark:text-gray-100 mb-2">
+          我记得关于您
+        </h3>
+        <MemorySection agentId={agentId} />
+      </div>
+    </div>
+  );
+}