diff --git a/docs/product-technical-gap-baseline.md b/docs/product-technical-gap-baseline.md
index e65883463..f90cd32ce 100644
--- a/docs/product-technical-gap-baseline.md
+++ b/docs/product-technical-gap-baseline.md
@@ -23,4 +23,79 @@
 - **Security & Compliance**: PII masking cannot break the system. Need SOC 2 and CSAP compliance alternatives to blind PII masking. 
 - **LLM Orchestration**: Ensure ALL LLM calls route through `contextual-orchestrator` utilizing API keys (BYTEZ, NVIDIA, OPENROUTER, OPENAI) with auto model discovery and optimal reasoning effort allocation (Fugu/Conductor/TRINITY research).
 
+## 4. 2026-08-23 Audit: Accessibility, i18n, and Release-Process Gaps
+
+A dedicated multi-agent audit (independently verified against live source and
+cross-checked against the full PR history to rule out duplicates) found 14
+new, previously-untracked gaps. None of these overlap the sections above.
+
+### 4a. Accessibility (frontend)
+- **Post detail popup has no dialog semantics on `main`** (true when this
+  audit ran): `PostDetailPopup` in `frontend/src/App.tsx` rendered a
+  backdrop/panel with no `role="dialog"`, `aria-modal`, `aria-labelledby`,
+  Escape-to-close, or focus trap/restore. **Already fixed, not yet on
+  `main`**: `docs/customer-master-scope-adr` (verified at commit
+  `7d6cab694d7d6998a2b5ecf8fb1ed2c704052411`) already has a complete
+  implementation -- `popupPanelRef`, `role="dialog"`/`aria-modal`, Tab-cycle
+  wraparound that filters hidden/`aria-hidden`/closed-`<details>` elements,
+  Escape-to-close, and focus-restore-on-unmount via effect cleanup. No new
+  PR needed here; this resolves once that branch reaches `main`.
+- **Async error feedback isn't announced**: 17 of 19 `className="error"`
+  sites in `App.tsx` render as plain `<p>` with no `role="alert"`/`aria-live`
+  (Ask, Keymen extraction, lineage rebuild, Customer Master, Ask Agent, and
+  more). Fixed in the accessibility-sweep PR referenced below.
+- **Two inputs have no accessible name**: the "Ask about this lineage"
+  question field and the new-ticket-title field use only a `placeholder`,
+  unlike the adjacent due-date field. Fixed in the same sweep.
+- **AdminPanel save result isn't announced**: the save-success/error `<span>`
+  in `AdminPanel.tsx` carries no `role`/`aria-live`. Fixed in the same sweep.
+- **Event Lineage DAG node kind (root/branch/regular) is color-only**: no
+  textual indication in the `aria-label`, tooltip, or a legend; not fixed by
+  the existing DAG test/story coverage (that PR explicitly found no bug).
+  Needs a legend/label design decision, not yet fixed.
+- **DAG keyboard focus ring is very weak**: `.lineage-dag-node:focus` strips
+  the native outline and replaces it with only a 1px stroke-width bump in the
+  same border color. Fixed in the accessibility-sweep PR.
+- **Rendered post-body tables have no header semantics**: both the
+  structured-unit table renderer and the OCR-image-text table renderer in
+  `PostBody.tsx` emit only `<td>`, no `<th scope="col">`/`<caption>`. Was
+  present in a prior merged PR (#303) but silently dropped by a later
+  whole-file rewrite (commit `ef6f5a5f`). Not yet re-fixed.
+
+### 4b. i18n
+- **Unregistered aria-label key**: `tf("Affiliates of {name}")` (the
+  customer-entity-tree `aria-label` in `App.tsx`) has no entry in any of the
+  ko/zh/ja/vi locale blocks in `i18n.ts`, so it always renders in English
+  regardless of the active locale. Fixed in the accessibility-sweep PR.
+
+### 4c. Release-process / CHANGELOG hygiene
+- **CHANGELOG.md stalled at `[2.12.6]`** while the tree already contains ~80
+  additional ADRs and whole undocumented feature surfaces (Global Ask
+  evidence workspace, the buyer-facing global nav). No version header past
+  2.12.6 exists anywhere in the file. Large, needs careful reconstruction;
+  logged here rather than attempted in this pass.
+- **9 already-drafted `CHANGELOG.d/` fragments (2.12.7 through 2.21.1) were
+  never compiled** into `CHANGELOG.md` — the release text already exists,
+  the compile step was simply never run. Fixed in a dedicated compilation PR
+  (mechanical, low-risk since the prose already exists).
+- **The `ef6f5a5f` squash-merge (PR #347) left at least one shipped feature
+  undocumented**: the durable post-content ingestion queue (ADR 0098) has no
+  CHANGELOG.md entry and no `CHANGELOG.d/` fragment, unlike its sibling
+  changes in the same commit. Logged, not yet fixed.
+- **PR #460's own fix is missing from `CHANGELOG.md`'s `[Unreleased]`
+  section.** Will be added alongside the CHANGELOG.d compilation PR.
+- **Version fields agree with CHANGELOG (2.12.6) only because both are
+  equally stalled**, not because the release process is healthy — real
+  merged work already sits past that version with no compiled release.
+  Same root cause as the two items above; resolved once a batch-release pass
+  runs.
+
+### 4d. Test coverage
+- **Bookmark endpoints (`GET`/`POST /api/posts/{post_id}/bookmark`) have zero
+  HTTP-level test coverage.** The only existing tests exercise the lower-level
+  `_load_visible_post` helper directly, bypassing FastAPI entirely — the
+  route wiring, request validation, and the `post_bookmark` insert/delete SQL
+  introduced by a recent fix are unexercised. Needs a `TestClient`-level
+  test; not yet added.
+
 *This document is continuously updated by the hourly automated agent loop.*
diff --git a/frontend/src/App.test.tsx b/frontend/src/App.test.tsx
index 7462abd2c..9582ae69e 100644
--- a/frontend/src/App.test.tsx
+++ b/frontend/src/App.test.tsx
@@ -28,19 +28,25 @@ beforeEach(() => {
 
 afterEach(() => {
   vi.unstubAllGlobals();
+  window.sessionStorage.clear();
+  window.localStorage.clear();
 });
 
 describe("App, unauthenticated", () => {
   it("shows a login button that starts the real OIDC redirect", async () => {
+    window.history.replaceState({}, "", "/?post=abc#details");
     render(<App showLabPanels />);
     const button = screen.getByRole("button", { name: /log in/i });
     await userEvent.click(button);
     expect(signinRedirect).toHaveBeenCalledTimes(1);
     expect(signinRedirect).toHaveBeenCalledWith(
       expect.objectContaining({
-        state: expect.objectContaining({ returnUrl: expect.stringMatching(/^\//) }),
+        state: expect.objectContaining({ returnUrl: "/?post=abc#details" }),
       }),
     );
+    // Persisted as a fallback in case the OIDC state round-trip is dropped
+    // (see oidcReturnUrl.ts's restoreOidcReturnUrl, consumed in main.tsx).
+    expect(window.sessionStorage.getItem("lineageweave.oidc.returnUrl")).toBe("/?post=abc#details");
   });
 });
 
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 6fba0dd41..1b5b351ab 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -4610,7 +4610,8 @@ export default function App({ showLabPanels = false }: { showLabPanels?: boolean
             </div>
             <div className="login-controls">
               <button className="btn-primary" onClick={() => {
-                const returnUrl = window.location.pathname + window.location.search;
+                const returnUrl = returnUrlFromLocation();
+                rememberOidcReturnUrl(returnUrl);
                 void auth.signinRedirect({ state: { returnUrl } });
               }}>
                 {t("Log in")}
@@ -4620,7 +4621,6 @@ export default function App({ showLabPanels = false }: { showLabPanels?: boolean
               <small>Enterprise SSO Authentication</small>
             </div>
           </div>
-          {destination === "admin" ? <AdminPanel currentBrandName={brandName} onBrandNameChange={setBrandName} accessToken={accessToken} /> : null}
       </main>
         <footer className="app-footer" role="contentinfo">
           <div className="app-footer-title">