fix(engineering-dashboard): read token from URL/meta under CSP

Remove the inline token script blocked by script-src 'self', so the
live page no longer calls the snapshot API with token=undefined.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/engineeringdashboard/assets/app.js

@@ -1,5 +1,13 @@
 (function () {
-  const token = window.__DASHBOARD_TOKEN__;
+  function resolveToken() {
+    const fromURL = new URL(window.location.href).searchParams.get("token");
+    if (fromURL) return fromURL;
+    const meta = document.querySelector('meta[name="engineering-dashboard-token"]');
+    const fromMeta = meta && meta.getAttribute("content");
+    if (fromMeta && fromMeta !== "__TOKEN__") return fromMeta;
+    return "";
+  }
+  const token = resolveToken();
   const state = {
     snap: null,
     view: "overview",
@@ -25,7 +33,7 @@
 
   function syncURL() {
     const u = new URL(window.location.href);
-    u.searchParams.set("token", token);
+    if (token) u.searchParams.set("token", token);
     u.searchParams.set("view", state.view);
     if (state.q) u.searchParams.set("q", state.q); else u.searchParams.delete("q");
     if (state.selectedDoc) u.searchParams.set("doc", state.selectedDoc); else u.searchParams.delete("doc");
@@ -44,6 +52,11 @@
   }
 
   async function fetchSnapshot(force) {
+    if (!token) {
+      el.status.textContent = "缺少访问令牌";
+      renderHardError("缺少 token：请使用服务启动时打印的完整 URL（含 ?token=）打开页面");
+      return false;
+    }
     el.status.textContent = state.snap ? "刷新中…" : "首次加载中…";
     const url = "/api/v1/snapshot?token=" + encodeURIComponent(token) + (force ? "&refresh=1" : "");
     const headers = {};
@@ -281,6 +294,10 @@
 
   async function loop() {
     loadURL();
+    if (!token) {
+      renderHardError("缺少 token：请使用服务启动时打印的完整 URL（含 ?token=）打开页面");
+      return;
+    }
     try {
       const changed = await fetchSnapshot(true);
       if (changed || state.snap) render();

internal/engineeringdashboard/assets/index.html

@@ -3,6 +3,7 @@
 <head>
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
+  <meta name="engineering-dashboard-token" content="__TOKEN__">
   <title>个人工程中控台</title>
   <link rel="stylesheet" href="/assets/app.css?token=__TOKEN__">
 </head>
@@ -37,7 +38,6 @@
       <div id="content"></div>
     </main>
   </div>
-  <script>window.__DASHBOARD_TOKEN__ = "__TOKEN__";</script>
   <script src="/assets/app.js?token=__TOKEN__"></script>
 </body>
 </html>

internal/engineeringdashboard/server_test.go

@@ -128,3 +128,43 @@ func TestServer_CrossOriginDenied(t *testing.T) {
 		t.Fatalf("got %d", rr.Code)
 	}
 }
+
+func TestServer_IndexUsesMetaTokenNoInlineScript(t *testing.T) {
+	c := NewCollector(t.TempDir(), &FakeRunner{})
+	c.mu.Lock()
+	c.current = &Snapshot{RevisionID: "r", GenerationID: "g", GeneratedAt: time.Now().UTC()}
+	c.mu.Unlock()
+	srv, err := NewServer(c)
+	if err != nil {
+		t.Fatal(err)
+	}
+	req := httptest.NewRequest(http.MethodGet, "/?token="+srv.Token, nil)
+	req.Host = "127.0.0.1:8787"
+	rr := httptest.NewRecorder()
+	srv.Handler().ServeHTTP(rr, req)
+	if rr.Code != http.StatusOK {
+		t.Fatalf("index: %d %s", rr.Code, rr.Body.String())
+	}
+	body := rr.Body.String()
+	if strings.Contains(body, "window.__DASHBOARD_TOKEN__") {
+		t.Fatal("index must not use inline token script (CSP script-src 'self')")
+	}
+	meta := `name="engineering-dashboard-token" content="` + srv.Token + `"`
+	if !strings.Contains(body, meta) {
+		t.Fatalf("missing token meta: %s", body[:min(400, len(body))])
+	}
+	if !strings.Contains(rr.Header().Get("Content-Security-Policy"), "script-src 'self'") {
+		t.Fatalf("unexpected CSP: %s", rr.Header().Get("Content-Security-Policy"))
+	}
+	// app.js must not reference the removed global
+	js, err := readAsset("assets/app.js")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if strings.Contains(string(js), "__DASHBOARD_TOKEN__") {
+		t.Fatal("app.js still references __DASHBOARD_TOKEN__")
+	}
+	if !strings.Contains(string(js), "engineering-dashboard-token") {
+		t.Fatal("app.js should read meta engineering-dashboard-token")
+	}
+}