feat(web): AI 分析详情增加建议面板 — 风险等级+建议列表+审批操作

- 新增 suggestions API 层（list/approve/getComparison）
- 展开分析详情时自动加载关联的 AI 建议列表
- 风险等级彩色标签（低/中/高）
- 建议类型、原因、执行状态展示
- 待审批建议支持批准/拒绝操作

apps/web/src/api/ai/suggestions.ts

@@ -0,0 +1,34 @@
+import client from '../client';
+
+export interface SuggestionItem {
+  id: string;
+  analysis_id: string;
+  suggestion_type: string;
+  risk_level: string;
+  params: Record<string, unknown> | null;
+  status: string;
+  created_at: string;
+}
+
+export interface ComparisonReport {
+  suggestion_id: string;
+  baseline: Record<string, unknown> | null;
+  current: Record<string, unknown> | null;
+  comparison_available: boolean;
+  message?: string;
+}
+
+export const suggestionApi = {
+  list: async (params?: { analysis_id?: string; status?: string }) => {
+    const resp = await client.get('/ai/suggestions', { params });
+    return resp.data.data as { data: SuggestionItem[]; total: number };
+  },
+  approve: async (id: string, action: 'approve' | 'reject') => {
+    const resp = await client.post(`/ai/suggestions/${id}/approve`, { action });
+    return resp.data.data as { id: string; status: string };
+  },
+  getComparison: async (id: string) => {
+    const resp = await client.get(`/ai/suggestions/${id}/comparison`);
+    return resp.data.data as ComparisonReport;
+  },
+};