feat(web-probe): add multi-sentinel registry

scripts/assets/web-probe-sentinel-dashboard/dashboard.js

@@ -1,4 +1,5 @@
 // SPEC: PJ2026-01060508 Web哨兵 draft-2026-06-26-p9-desktop-view-density.
+// SPEC: PJ2026-01060508 Web哨兵 draft-2026-06-26-p9-multi-web-probe-sentinel.
 // Responsibility: Browser-side API client, formatting, auto refresh, and base dashboard rendering.
 // Desktop view redesign (issue #1025): 三栏 master-detail、低噪声、渐进披露、排查直觉化。
 // 保持纯 vanilla JS + 原生 CSS，无框架、无构建步骤，所有渲染通过 innerHTML 拼接。
@@ -15,6 +16,7 @@
  */
 
 const root = document.getElementById("sentinel-dashboard");
+const basePath = normalizeBasePath(root?.dataset?.basePath || "");
 const refs = {
   statusPill: document.getElementById("status-pill"),
   loadingBanner: document.getElementById("loading-banner"),
@@ -178,21 +180,31 @@ loadDashboard({ silent: false }).catch((error) => renderError(error));
 function createDashboardApi() {
   return {
     /** @returns {Promise<SentinelOverview>} */
-    overview: () => getJson("/api/overview"),
+    overview: () => getJson(apiPath("/api/overview")),
     /** @returns {Promise<SentinelRunsResponse>} */
-    runs: (filters) => getJson(`/api/runs?${runsQuery(filters)}`),
+    runs: (filters) => getJson(apiPath(`/api/runs?${runsQuery(filters)}`)),
     /** @returns {Promise<SentinelFindingsResponse>} */
-    findings: (filters) => getJson(`/api/findings?${findingsQuery(filters)}`),
+    findings: (filters) => getJson(apiPath(`/api/findings?${findingsQuery(filters)}`)),
     /** @returns {Promise<SentinelRunDetail>} */
-    runDetail: (runId) => getJson(`/api/runs/${encodeURIComponent(runId)}`),
+    runDetail: (runId) => getJson(apiPath(`/api/runs/${encodeURIComponent(runId)}`)),
     runViews: (runId, view = null) => {
       const query = new URLSearchParams({ maxBytes: "24000" });
       if (view) query.set("view", view);
-      return getJson(`/api/runs/${encodeURIComponent(runId)}/views?${query.toString()}`);
+      return getJson(apiPath(`/api/runs/${encodeURIComponent(runId)}/views?${query.toString()}`));
     },
   };
 }
 
+function apiPath(path) {
+  return `${basePath}${path}`;
+}
+
+function normalizeBasePath(value) {
+  const text = String(value || "").replace(/\/+$/u, "");
+  if (!text || text === "/") return "";
+  return text.startsWith("/") ? text : `/${text}`;
+}
+
 async function getJson(path) {
   const response = await fetch(path, { headers: { accept: "application/json" } });
   const body = await response.json().catch(() => ({}));