fix(sse): exact-domain cookie match and origin-equality URL assertions

Clears CodeQL js/incomplete-url-substring-sanitization alerts #860-#865:

- volcengineConsoleAutoLogin: cookie domain filter now uses an exact/
  dot-suffix helper (isVolcengineCookieDomain) instead of substring
  includes(), rejecting look-alike hosts like volcengine.com.evil.test
- security-s1-s2-s4 tests: agent-card/agent.json URL assertions compare
  parsed origin equality instead of startsWith prefix

open-sse/services/volcengineConsoleAutoLogin.ts

@@ -96,6 +96,13 @@ const ARK_CONSOLE_URL =
 /** Cookie names required for a valid console session (mirrors tokenExtractionConfig) */
 const REQUIRED_COOKIES = ["digest", "AccountID", "csrfToken", "userInfo"] as const;
 
+/** Exact-domain match for session cookies — substring checks would also accept
+ * look-alike hosts (e.g. `volcengine.com.evil.test`). Playwright may report the
+ * domain with or without a leading dot. */
+function isVolcengineCookieDomain(domain: string): boolean {
+  return domain === "volcengine.com" || domain.endsWith(".volcengine.com");
+}
+
 const DEFAULT_SESSION_TIMEOUT = 300_000;
 const SUBMIT_COOKIE_TIMEOUT = 90_000;
 const CAPTURE_POLL_INTERVAL = 1_000;
@@ -618,7 +625,7 @@ export class VolcengineConsoleAutoLoginService {
       for (const cookie of cookies as Array<{ name: string; domain: string; value: string }>) {
         if (
           REQUIRED_COOKIES.includes(cookie.name as (typeof REQUIRED_COOKIES)[number]) &&
-          cookie.domain.includes("volcengine.com")
+          isVolcengineCookieDomain(cookie.domain)
         ) {
           credentials[cookie.name] = cookie.value;
         }
@@ -763,7 +770,7 @@ export class VolcengineConsoleAutoLoginService {
           domain: string;
         }>;
         const present = REQUIRED_COOKIES.filter((name) =>
-          cookies.some((c) => c.name === name && c.domain.includes("volcengine.com"))
+          cookies.some((c) => c.name === name && isVolcengineCookieDomain(c.domain))
         );
         parts.push(
           `cookies=[${present.join(",") || "none of digest/AccountID/csrfToken/userInfo"}]`

tests/unit/security-s1-s2-s4.test.ts

@@ -41,11 +41,13 @@ describe("S2 — agent-card topology sanitisation", () => {
     assert.equal(res.status, 200);
     const card = (await res.json()) as { url?: string; supportedInterfaces?: { url?: string }[] };
     assert.ok(card.url, "card must have a url");
-    assert.ok(card.url.startsWith("https://gateway.example.com"), `expected gateway.example.com, got ${card.url}`);
+    assert.equal(new URL(card.url).origin, "https://gateway.example.com", `expected gateway.example.com origin, got ${card.url}`);
     if (card.supportedInterfaces && card.supportedInterfaces.length > 0) {
-      assert.ok(
-        card.supportedInterfaces[0].url?.startsWith("https://gateway.example.com"),
-        `interface URL should use dynamic origin, got ${card.supportedInterfaces[0].url}`
+      const ifaceUrl = card.supportedInterfaces[0].url;
+      assert.equal(
+        ifaceUrl ? new URL(ifaceUrl).origin : undefined,
+        "https://gateway.example.com",
+        `interface URL should use dynamic origin, got ${ifaceUrl}`
       );
     }
   });
@@ -62,7 +64,8 @@ describe("S2 — agent-card topology sanitisation", () => {
     const res = await mod.GET(request);
     assert.equal(res.status, 200);
     const card = (await res.json()) as { url?: string };
-    assert.ok(card.url?.startsWith("https://custom.example.com"), `expected custom.example.com, got ${card.url}`);
+    assert.ok(card.url, "card must have a url");
+    assert.equal(new URL(card.url).origin, "https://custom.example.com", `expected custom.example.com origin, got ${card.url}`);
   });
 
   it("agent.json derives URL from request.nextUrl.origin when OMNIROUTE_BASE_URL is unset", async () => {
@@ -76,7 +79,8 @@ describe("S2 — agent-card topology sanitisation", () => {
     const res = await mod.GET(request);
     assert.equal(res.status, 200);
     const card = (await res.json()) as { url?: string };
-    assert.ok(card.url?.startsWith("https://gateway.example.com"), `expected gateway.example.com, got ${card.url}`);
+    assert.ok(card.url, "card must have a url");
+    assert.equal(new URL(card.url).origin, "https://gateway.example.com", `expected gateway.example.com origin, got ${card.url}`);
   });
 });