feat: 接入 VizieR 星表检索与 LAMOST/Gaia/SDSS/DESI 跨源光谱下载

新增天文观测数据获取能力，覆盖星表查询与一维光谱下载两大场景：

星表检索（CDS VizieR）
- VizieR TAP 客户端（JSON 优先 + VOTable 降级），共享 IVOA VOTable 解析层
- 业务层支持自由 ADQL、锥形检索、交叉证认、星表发现与 CSV 导出
- ADQL 注入防护（标识符清洗 + 字符串字面量转义），TTL 缓存（7 天）

跨望远镜光谱下载（统一入口）
- 接入 LAMOST（ConeSearch + FITS.gz）、Gaia（TAP + DataLink ZIP）、
  SDSS（Data Lab TAP + SAS）、DESI（HEALPix coadd）四源
- 双模式：坐标模式（cone 检索 → 选源 → 下载）/ 标识符模式（直按 ID 下载）
- 光谱文件永久缓存（不可变），按 source+source_id 去重

Agent 与 API
- +4 工具：query_vizier / cone_search / find_spectrum / catalog_operation（22 → 26）
- +6 路由：/catalog/vizier、/cone、/crossmatch、/spectrum/{download,list}
- 前端新增 VizierResultCard / FindSpectrumCard 可视化卡片

工程重构
- services/target.rs (832 行) 拆分为 services/cds/{target,vizier}.rs + clients/cds/sesame.rs，
  贯彻 client（通信）/ service（缓存+编排）分层
- ADS 返回字段新增 data（关联数据表 URL），与星表功能联动

dashboard/src/components/agent/AgentMetricsPanel.tsx

@@ -31,6 +31,10 @@ const TOOL_LABELS: Record<string, string> = {
   get_paper_content: '获取内容',
   rag_search: 'RAG 检索',
   query_target: '天体查询',
+  query_vizier: 'VizieR 星表',
+  cone_search: '锥形检索',
+  find_spectrum: '光谱检索下载',
+  catalog_operation: '星表操作',
   save_note: '保存笔记',
   todo_write: '任务管理',
   compress_context: '上下文压缩',
@@ -63,6 +67,10 @@ const CATEGORY_COLORS: Record<string, string> = {
   get_paper_content: 'bg-emerald-100 text-emerald-700 border-emerald-200',
   rag_search: 'bg-violet-100 text-violet-700 border-violet-200',
   query_target: 'bg-amber-100 text-amber-700 border-amber-200',
+  query_vizier: 'bg-violet-100 text-violet-700 border-violet-200',
+  cone_search: 'bg-violet-100 text-violet-700 border-violet-200',
+  find_spectrum: 'bg-slate-200 text-slate-700 border-slate-300',
+  catalog_operation: 'bg-violet-100 text-violet-700 border-violet-200',
   save_note: 'bg-teal-100 text-teal-700 border-teal-200',
   todo_write: 'bg-orange-100 text-orange-700 border-orange-200',
   compress_context: 'bg-rose-100 text-rose-700 border-rose-200',

dashboard/src/components/agent/AuditLogViewer.tsx

@@ -34,6 +34,10 @@ function getToolDisplayName(name: string | null): string {
     get_paper_content: '获取内容',
     rag_search: 'RAG 检索',
     query_target: '天体查询',
+    query_vizier: 'VizieR 星表',
+    cone_search: '锥形检索',
+    find_spectrum: '光谱检索下载',
+    catalog_operation: '星表操作',
     save_note: '保存笔记',
     todo_write: '任务管理',
     compress_context: '压缩上下文',

dashboard/src/components/agent/SpecialToolRenderers.tsx

@@ -11,6 +11,8 @@ import {
   AlertTriangle,
   Cpu,
   Check,
+  Table as TableIcon,
+  Database,
 } from 'lucide-react';
 import type { StandardPaper } from '../../types';
 import type { useCitations } from '../../hooks/useCitations';
@@ -608,3 +610,261 @@ export function BgTaskProgressCard({ task }: BgTaskProgressCardProps) {
     </div>
   );
 }
+
+// ==========================================
+// 5. VizieR 星表查询结果卡片 (query_vizier / cone_search)
+// ==========================================
+interface VizierFieldInfo {
+  name: string;
+  description?: string;
+  unit?: string;
+  datatype?: string;
+}
+
+interface VizierResultCardProps {
+  metadata: {
+    table_name?: string;
+    fields: VizierFieldInfo[];
+    rows: unknown[][];
+    row_count: number;
+    truncated: boolean;
+  };
+}
+
+// 最多展示行数，避免渲染过多 DOM 节点
+const MAX_DISPLAY_ROWS = 50;
+
+export function VizierResultCard({ metadata }: VizierResultCardProps) {
+  const { table_name, fields = [], rows = [], row_count, truncated } = metadata;
+  const displayRows = rows.slice(0, MAX_DISPLAY_ROWS);
+  const hiddenCount = rows.length - displayRows.length;
+
+  const renderCell = (val: unknown): string => {
+    if (val === null || val === undefined) return '—';
+    if (typeof val === 'number') {
+      // 数字保留合理精度
+      return Number.isInteger(val) ? String(val) : val.toFixed(6).replace(/\.?0+$/, '');
+    }
+    if (typeof val === 'boolean') return val ? 'true' : 'false';
+    return String(val);
+  };
+
+  const cdsUrl = table_name
+    ? `https://vizier.cds.unistra.fr/viz-bin/VizieR-3?-source=${encodeURIComponent(table_name)}`
+    : 'https://vizier.cds.unistra.fr/';
+
+  return (
+    <div className="bg-violet-50/40 border border-violet-100 rounded-lg p-3.5 space-y-3 text-xs shadow-2xs">
+      {/* 标题栏 */}
+      <div className="flex items-center justify-between border-b border-violet-100/70 pb-2">
+        <div className="flex items-center gap-1.5 font-bold text-violet-900 text-[11px] uppercase tracking-wide">
+          <TableIcon className="w-3.5 h-3.5 text-violet-600" />
+          <span>VizieR 星表查询结果</span>
+        </div>
+        <a
+          href={cdsUrl}
+          target="_blank"
+          rel="noopener noreferrer"
+          className="text-[10px] font-bold text-violet-600 hover:text-violet-800 flex items-center gap-0.5 hover:underline"
+        >
+          <span>CDS</span>
+          <ExternalLink className="w-2.5 h-2.5" />
+        </a>
+      </div>
+
+      {/* 元信息 */}
+      <div className="flex flex-wrap items-center gap-x-3 gap-y-1 text-[10px] text-slate-600">
+        {table_name && (
+          <span className="flex items-center gap-1 font-semibold text-violet-700">
+            <Database className="w-3 h-3" />
+            {table_name}
+          </span>
+        )}
+        <span className="bg-violet-100 text-violet-700 px-1.5 py-0.5 rounded font-medium">
+          {row_count} 行
+        </span>
+        <span className="text-slate-500">{fields.length} 列</span>
+        {truncated && (
+          <span className="flex items-center gap-0.5 text-amber-600 font-medium">
+            <AlertTriangle className="w-3 h-3" />
+            已截断
+          </span>
+        )}
+      </div>
+
+      {/* 表格 */}
+      {fields.length === 0 || rows.length === 0 ? (
+        <p className="text-[11px] text-slate-400 italic py-2">(无数据行)</p>
+      ) : (
+        <div className="overflow-x-auto max-h-72 overflow-y-auto border border-slate-200 rounded">
+          <table className="w-full text-[10px] border-collapse">
+            <thead className="sticky top-0 bg-slate-100 z-10">
+              <tr>
+                {fields.map((f, i) => (
+                  <th
+                    key={i}
+                    className="px-2 py-1.5 text-left font-bold text-slate-600 border-b border-slate-200 whitespace-nowrap"
+                    title={f.description || f.unit ? `${f.description || ''} ${f.unit ? `[${f.unit}]` : ''}`.trim() : undefined}
+                  >
+                    {f.name}
+                    {f.unit && (
+                      <span className="text-slate-400 font-normal ml-1">[{f.unit}]</span>
+                    )}
+                  </th>
+                ))}
+              </tr>
+            </thead>
+            <tbody>
+              {displayRows.map((row, ri) => (
+                <tr
+                  key={ri}
+                  className={ri % 2 === 0 ? 'bg-white' : 'bg-slate-50/50'}
+                >
+                  {fields.map((_, ci) => (
+                    <td
+                      key={ci}
+                      className="px-2 py-1 text-slate-700 border-b border-slate-100 whitespace-nowrap font-mono"
+                    >
+                      {renderCell(row[ci])}
+                    </td>
+                  ))}
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        </div>
+      )}
+
+      {/* 底部提示 */}
+      {hiddenCount > 0 && (
+        <p className="text-[10px] text-slate-400">
+          已展示前 {MAX_DISPLAY_ROWS} 行，{hiddenCount} 行已折叠
+        </p>
+      )}
+    </div>
+  );
+}
+
+
+// ==========================================
+// 6. 统一光谱下载结果卡片 (find_spectrum)
+// ==========================================
+interface SpectrumDownloadItem {
+  survey: string;
+  source_label: string;
+  file_path: string;
+  file_url: string;
+  file_format: string;
+  size_bytes: number;
+  cached: boolean;
+}
+
+interface FindSpectrumCardProps {
+  metadata: {
+    survey: string;
+    ra?: number;
+    dec?: number;
+    radius_deg?: number;
+    matched_count: number;
+    downloads: SpectrumDownloadItem[];
+    failures: { source_label: string; error: string }[];
+  };
+}
+
+const SURVEY_THEME: Record<string, { badge: string; label: string }> = {
+  lamost: { badge: 'bg-amber-100 text-amber-700', label: 'LAMOST' },
+  gaia: { badge: 'bg-sky-100 text-sky-700', label: 'Gaia' },
+  sdss: { badge: 'bg-indigo-100 text-indigo-700', label: 'SDSS' },
+  desi: { badge: 'bg-emerald-100 text-emerald-700', label: 'DESI' },
+};
+
+export function FindSpectrumCard({ metadata }: FindSpectrumCardProps) {
+  const { survey, ra, dec, radius_deg, matched_count, downloads = [], failures = [] } = metadata;
+  const theme = SURVEY_THEME[survey] || SURVEY_THEME.lamost;
+  const hasResult = downloads.length > 0 || failures.length > 0;
+
+  return (
+    <div className="bg-slate-50/60 border border-slate-200 rounded-lg p-3.5 space-y-3 text-xs shadow-2xs">
+      {/* 标题栏 */}
+      <div className="flex items-center justify-between border-b border-slate-200/70 pb-2">
+        <div className="flex items-center gap-1.5 font-bold text-slate-800 text-[11px] uppercase tracking-wide">
+          <Activity className="w-3.5 h-3.5 text-slate-500" />
+          <span>统一光谱检索</span>
+        </div>
+        <span className={`px-2 py-0.5 rounded text-[10px] font-bold ${theme.badge}`}>
+          {theme.label}
+        </span>
+      </div>
+
+      {/* 查询信息 */}
+      <div className="flex flex-wrap items-center gap-x-3 gap-y-1 text-[10px] text-slate-600">
+        {ra !== undefined && dec !== undefined && (
+          <span className="font-mono">
+            ra={ra.toFixed(4)} dec={dec.toFixed(4)}
+            {radius_deg !== undefined ? ` r=${radius_deg}°` : ''}
+          </span>
+        )}
+        <span className="bg-slate-200 text-slate-700 px-1.5 py-0.5 rounded font-medium">
+          命中 {matched_count} 条
+        </span>
+        {downloads.length > 0 && (
+          <span className="flex items-center gap-0.5 text-emerald-600 font-medium">
+            <CheckCircle2 className="w-3 h-3" />
+            下载 {downloads.length}
+          </span>
+        )}
+        {failures.length > 0 && (
+          <span className="flex items-center gap-0.5 text-rose-600 font-medium">
+            <AlertTriangle className="w-3 h-3" />
+            失败 {failures.length}
+          </span>
+        )}
+      </div>
+
+      {/* 下载结果列表 */}
+      {downloads.map((d, i) => (
+        <div key={i} className="border border-slate-200 rounded bg-white p-2.5 space-y-1.5">
+          <div className="flex items-center justify-between">
+            <span className="font-mono font-medium text-slate-700">{d.source_label}</span>
+            {d.cached ? (
+              <span className="flex items-center gap-0.5 text-[10px] text-emerald-600">
+                <CheckCircle2 className="w-3 h-3" />缓存
+              </span>
+            ) : (
+              <span className="text-[10px] text-slate-400">新下载</span>
+            )}
+          </div>
+          <div className="flex items-center justify-between text-[10px]">
+            <span className="text-slate-500">
+              {d.file_format.toUpperCase()} · {d.size_bytes > 1024 ? `${(d.size_bytes / 1024).toFixed(1)} KB` : `${d.size_bytes} B`}
+            </span>
+            <a
+              href={d.file_url}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="flex items-center gap-0.5 font-bold text-sky-600 hover:text-sky-800 hover:underline"
+            >
+              <Download className="w-3 h-3" />
+              <span>FITS</span>
+            </a>
+          </div>
+        </div>
+      ))}
+
+      {/* 失败列表 */}
+      {failures.map((f, i) => (
+        <div key={`f${i}`} className="border border-rose-200 rounded bg-rose-50/50 p-2.5">
+          <div className="flex items-center gap-1 text-rose-700 font-medium">
+            <AlertTriangle className="w-3 h-3" />
+            <span className="font-mono text-[10px]">{f.source_label}</span>
+          </div>
+          <p className="text-[10px] text-rose-600 mt-1 break-all">{f.error}</p>
+        </div>
+      ))}
+
+      {!hasResult && (
+        <p className="text-[11px] text-slate-400 italic py-2">(该区域无光谱覆盖)</p>
+      )}
+    </div>
+  );
+}

dashboard/src/components/agent/ToolCallCard.tsx

@@ -10,6 +10,8 @@ import {
   PaperListCard,
   TodoTaskCard,
   BgTaskProgressCard,
+  VizierResultCard,
+  FindSpectrumCard,
 } from './SpecialToolRenderers';
 import type { StandardPaper } from '../../types';
 import type { useCitations } from '../../hooks/useCitations';
@@ -94,6 +96,62 @@ export function ToolCallCard({
       );
     }
 
+    // 1b. VizieR 星表查询 / Cone Search
+    if (
+      (name === 'query_vizier' || name === 'cone_search') &&
+      metadata &&
+      typeof metadata === 'object' &&
+      'fields' in metadata &&
+      'rows' in metadata
+    ) {
+      return (
+        <VizierResultCard
+          metadata={
+            metadata as {
+              table_name?: string;
+              fields: { name: string; description?: string; unit?: string; datatype?: string }[];
+              rows: unknown[][];
+              row_count: number;
+              truncated: boolean;
+            }
+          }
+        />
+      );
+    }
+
+    // 1c. 统一光谱下载（find_spectrum）
+    if (
+      name === 'find_spectrum' &&
+      metadata &&
+      typeof metadata === 'object' &&
+      'survey' in metadata &&
+      'downloads' in metadata
+    ) {
+      return (
+        <FindSpectrumCard
+          metadata={
+            metadata as {
+              survey: string;
+              ra?: number;
+              dec?: number;
+              radius_deg?: number;
+              matched_count: number;
+              downloads: {
+                survey: string;
+                source_label: string;
+                file_path: string;
+                file_url: string;
+                file_format: string;
+                size_bytes: number;
+                cached: boolean;
+              }[];
+              failures: { source_label: string; error: string }[];
+            }
+          }
+        />
+      );
+    }
+
     // 2. 文献检索 / 馆藏检索
     if (
       (name === 'search_papers' || name === 'search_local_library') &&

dashboard/src/components/agent/toolDisplayNames.ts

@@ -31,6 +31,14 @@ export function getToolDisplayName(name: string): string {
       return '检索馆藏知识库';
     case 'query_target':
       return '查询天体物理参数 (CDS)';
+    case 'query_vizier':
+      return '查询 VizieR 星表';
+    case 'cone_search':
+      return '锥形检索天体';
+    case 'find_spectrum':
+      return '检索下载光谱';
+    case 'catalog_operation':
+      return '星表操作';
     case 'save_note':
       return '保存文献手札';
     // Agent 控制工具