feat(codex): add OAuth fingerprint convergence modes (#10243)

* fix(deps): bump nanoid, dompurify for 2 new Dependabot alerts (#189, #190)

Bumps: nanoid ^3.3.17 (was transitive, now overridden), dompurify ^3.4.13
(with monaco-editor scoped override). Closes Dependabot #189, #190.

Remaining #182-#188 (js-yaml + mermaid) already closed by #9651 merge —
awaiting Dependabot re-scan.

npm audit → 0 vulnerabilities.

* fix(repo): harden .gitignore to also ignore a _tasks symlink (/_tasks)

_tasks is a SEPARATE nested git repo (gitignored). The pattern _tasks/ (trailing
slash) ignores only a directory, not a SYMLINK named _tasks. A self-referential
_tasks symlink can slip in via git add -A and, once pulled, checkout materializes
it over the real _tasks repo (destroying plans/specs/hands-off). Anchored /_tasks
ignores the symlink too, preventing re-capture.

* feat(codex): converge OAuth fingerprints

* test(codex): preserve identity assertions

* fix(codex): preserve explicit off identity

* fix(codex): close fingerprint transport gaps

---------

Co-authored-by: diegosouzapw <diegosouzapw@users.noreply.github.com>
Co-authored-by: Diego Rodrigues de Sa e Souza <diegosouza.pw@outlook.com>
Co-authored-by: diegosouzapw <diegosouza.pw@gmail.com>
Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>

scripts/dev/responses-ws-proxy.mjs

@@ -317,6 +317,17 @@ function getAuthHeaders(requestUrl, requestHeaders) {
   if (isText(requestHeaders["x-forwarded-for"])) {
     headers["x-forwarded-for"] = requestHeaders["x-forwarded-for"];
   }
+  for (const key of [
+    "session-id",
+    "session_id",
+    "x-codex-installation-id",
+    "x-codex-window-id",
+    "x-codex-turn-metadata",
+    "originator",
+    "user-agent",
+  ]) {
+    if (isText(requestHeaders[key])) headers[key] = requestHeaders[key];
+  }
   return headers;
 }
 

scripts/dev/v1-ws-bridge.mjs

@@ -185,6 +185,18 @@ function getForwardHeaders(requestUrl, requestHeaders) {
     headers.origin = origin;
   }
 
+  for (const key of [
+    "session-id",
+    "session_id",
+    "x-codex-installation-id",
+    "x-codex-window-id",
+    "x-codex-turn-metadata",
+    "originator",
+    "user-agent",
+  ]) {
+    if (isText(requestHeaders[key])) headers[key] = requestHeaders[key];
+  }
+
   return headers;
 }