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/ProposalsSection.tsx

@@ -0,0 +1,141 @@
+import { CheckCircle, XCircle, Clock, Lightbulb, ChevronDown, ChevronUp } from 'lucide-react';
+import { useState } from 'react';
+import type { ButlerProposal } from '../../lib/viking-client';
+import { updateButlerProposalStatus } from '../../lib/viking-client';
+
+interface ProposalsSectionProps {
+  proposals: ButlerProposal[];
+  onStatusChange?: () => void;
+}
+
+function ProposalStatusBadge({ status }: { status: ButlerProposal['status'] }) {
+  const config = {
+    pending: { bg: 'bg-amber-100 dark:bg-amber-900/30', text: 'text-amber-700 dark:text-amber-300', icon: Clock, label: '待处理' },
+    accepted: { bg: 'bg-blue-100 dark:bg-blue-900/30', text: 'text-blue-700 dark:text-blue-300', icon: CheckCircle, label: '已接受' },
+    rejected: { bg: 'bg-gray-100 dark:bg-gray-800', text: 'text-gray-500 dark:text-gray-400', icon: XCircle, label: '已拒绝' },
+    completed: { bg: 'bg-emerald-100 dark:bg-emerald-900/30', text: 'text-emerald-700 dark:text-emerald-300', icon: CheckCircle, label: '已完成' },
+  };
+  const c = config[status];
+  const Icon = c.icon;
+  return (
+    <span className={`inline-flex items-center gap-1 px-1.5 py-0.5 rounded text-xs font-medium ${c.bg} ${c.text}`}>
+      <Icon className="w-3 h-3" />
+      {c.label}
+    </span>
+  );
+}
+
+export function ProposalsSection({ proposals, onStatusChange }: ProposalsSectionProps) {
+  const [expandedId, setExpandedId] = useState<string | null>(null);
+  const [updating, setUpdating] = useState<string | null>(null);
+
+  const handleStatusUpdate = async (proposalId: string, status: string) => {
+    setUpdating(proposalId);
+    try {
+      await updateButlerProposalStatus(proposalId, status);
+      onStatusChange?.();
+    } catch (err) {
+      // Error handled silently - UI will not update
+    } finally {
+      setUpdating(null);
+    }
+  };
+
+  if (proposals.length === 0) {
+    return (
+      <div className="text-center py-8">
+        <Lightbulb className="w-8 h-8 mx-auto mb-2 text-gray-300 dark:text-gray-600" />
+        <p className="text-sm text-gray-500 dark:text-gray-400">暂无方案</p>
+        <p className="text-xs text-gray-400 dark:text-gray-500 mt-1">
+          当管家发现高置信度痛点时，会自动生成解决方案
+        </p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-3">
+      {proposals.map((proposal) => {
+        const isExpanded = expandedId === proposal.id;
+        const isUpdating = updating === proposal.id;
+
+        return (
+          <div
+            key={proposal.id}
+            className="rounded-lg border border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800 overflow-hidden"
+          >
+            <button
+              className="w-full px-3 py-2.5 flex items-start gap-2 text-left hover:bg-gray-50 dark:hover:bg-gray-750"
+              onClick={() => setExpandedId(isExpanded ? null : proposal.id)}
+            >
+              <div className="flex-1 min-w-0">
+                <div className="text-sm font-medium text-gray-900 dark:text-gray-100 mb-1 truncate">
+                  {proposal.title}
+                </div>
+                <ProposalStatusBadge status={proposal.status} />
+              </div>
+              {isExpanded ? (
+                <ChevronUp className="w-4 h-4 text-gray-400 flex-shrink-0" />
+              ) : (
+                <ChevronDown className="w-4 h-4 text-gray-400 flex-shrink-0" />
+              )}
+            </button>
+
+            {isExpanded && (
+              <div className="px-3 pb-3 border-t border-gray-100 dark:border-gray-700 pt-2 space-y-3">
+                <p className="text-xs text-gray-600 dark:text-gray-400 whitespace-pre-line">
+                  {proposal.description}
+                </p>
+
+                {proposal.steps.length > 0 && (
+                  <div className="space-y-1.5">
+                    <div className="text-xs font-medium text-gray-600 dark:text-gray-300">步骤:</div>
+                    {proposal.steps.map((step) => (
+                      <div
+                        key={step.index}
+                        className="flex items-start gap-2 text-xs"
+                      >
+                        <span className="flex-shrink-0 w-5 h-5 rounded-full bg-blue-100 dark:bg-blue-900/30 text-blue-700 dark:text-blue-300 flex items-center justify-center font-medium">
+                          {step.index}
+                        </span>
+                        <div className="flex-1">
+                          <div className="font-medium text-gray-700 dark:text-gray-300">
+                            {step.action}
+                          </div>
+                          <div className="text-gray-500 dark:text-gray-400">
+                            {step.detail}
+                          </div>
+                        </div>
+                      </div>
+                    ))}
+                  </div>
+                )}
+
+                {proposal.status === 'pending' && (
+                  <div className="flex gap-2 pt-1">
+                    <button
+                      className="flex items-center gap-1 px-3 py-1.5 rounded-md text-xs font-medium bg-emerald-500 text-white hover:bg-emerald-600 disabled:opacity-50"
+                      onClick={() => handleStatusUpdate(proposal.id, 'accepted')}
+                      disabled={isUpdating}
+                    >
+                      <CheckCircle className="w-3.5 h-3.5" />
+                      接受
+                    </button>
+                    <button
+                      className="flex items-center gap-1 px-3 py-1.5 rounded-md text-xs font-medium bg-gray-200 dark:bg-gray-700 text-gray-700 dark:text-gray-300 hover:bg-gray-300 dark:hover:bg-gray-600 disabled:opacity-50"
+                      onClick={() => handleStatusUpdate(proposal.id, 'rejected')}
+                      disabled={isUpdating}
+                    >
+                      <XCircle className="w-3.5 h-3.5" />
+                      拒绝
+                    </button>
+                  </div>
+                )}
+              </div>
+            )}
+          </div>
+        );
+      })}
+    </div>
+  );
+}