feat(ui): one consistent navbar on every page (TODO.md L3)

frontend/assets/document.js

@@ -29,9 +29,10 @@
  *
  * Phase 19: the viewer joins the shared header (assets/header.js) — the
  * whoami fetch is the module's cached promise (one request per page,
- * shared with initSharedHeader's toggling), and the bar gains the New
- * chat button: on a non-chat page "new chat" means going to the chat,
- * fresh (clear the phase-14 conversation key, then navigate to "/").
+ * shared with initSharedHeader's toggling). Phase 34 task 02: the New
+ * chat binding is module-owned (assets/header.js, the SINGLE one) — on
+ * this non-chat page it clears the phase-14 conversation key and
+ * navigates to the chat's empty state.
  *
  * Phase 26 (import safety): the modal module imports renderDocument
  * from THIS file on the chat/sources pages, so everything
@@ -41,7 +42,7 @@
  * fetch, no New Chat binding.
  */
 
-import { clearChatStorage, fetchIsAdmin, initSharedHeader } from "./header.js";
+import { fetchIsAdmin, initSharedHeader } from "./header.js";
 
 function fmtDate(iso) {
   try {
@@ -71,6 +72,9 @@ function metaBadge(cls, text) {
  * document-derived string is a text node. */
 export function renderDocument(doc, { titleEl, metaEl, contentEl }) {
   titleEl.textContent = doc.title;
+  // Phase 34 task 04: the titlebar title ellipsizes — the full title
+  // stays reachable on hover via the `title` attribute.
+  titleEl.setAttribute("title", doc.title);
 
   const pathCode = document.createElement("code");
   pathCode.className = "doc-path";
@@ -149,16 +153,19 @@ if (document.querySelector("#doc-title")) {
 
   function showNotFound() {
     titleEl.textContent = "Document not found";
+    titleEl.removeAttribute("title"); // no stale full-title tooltip
     document.title = "Document not found · Brain of Reese";
     metaEl.replaceChildren();
     contentEl.replaceChildren();
     notFoundEl.hidden = false;
   }
 
-  /* Phase 19: the shared header controls (Sign in / Sign out — exactly
-   * one visible) are toggled here; the viewer has no nav, so there is
-   * no #nav-sources for the module to touch. Independent of the doc
-   * fetch (its own IIFE — load() below never waits on it).
+  /* Phase 19 (phase 34 task 03, owner confirmation 2026-08-26): the
+   * viewer now carries the SAME standard bar as every other page —
+   * nav incl. the admin-only links, Tuning toggle, Sync, New chat, the
+   * auth pair — all toggled here on the module's cached whoami.
+   * Independent of the doc fetch (its own IIFE — load() below never
+   * waits on it).
    * (fetchIsAdmin is imported for parity with the other header
    * consumers — the module's cached promise is the single whoami per
    * page either way.) */
@@ -166,16 +173,9 @@ if (document.querySelector("#doc-title")) {
     await initSharedHeader();
   })();
 
-  /* Phase 19: New chat on a non-chat page means "go to the chat,
-   * fresh": clear the phase-14 conversation key, then land on the chat
-   * page — its empty state, since the conversation is gone from storage. */
-  const newChatBtn = document.querySelector("#new-chat-btn");
-  if (newChatBtn) {
-    newChatBtn.addEventListener("click", () => {
-      clearChatStorage();
-      window.location.href = "/";
-    });
-  }
+  /* The New chat binding is module-owned (assets/header.js, phase 34
+   * task 02 — the SINGLE binding): on this non-chat page it clears the
+   * phase-14 conversation key and navigates to the chat's empty state. */
 
   async function load() {
     try {