# Story: Nav rename — "Sources" becomes "RAG", "Git sources" becomes "Sources"

**Phase:** `48_nav_rename_sources` · **E2E:** `tests/e2e/test_nav_rename_sources.py`

## Narrative

As **the admin (owner)**, the two admin-only nav items are confusing:
"Sources" (the document catalog) and "Git sources" (the source manager)
read like the same thing. I want the navbar to say **"RAG"** for the
document catalog page and **"Sources"** for the source manager page, so
the labels say what each page *is*: RAG = the indexed knowledge base you
chat against; Sources = where that knowledge comes from.

- **Given** I am signed in as admin, on any of the six pages (chat,
  sources, git-sources, tuning, document viewer, login)
- **When** I look at the primary nav
- **Then** the catalog link (`#nav-sources`, → `/sources.html`) is
  labeled **"RAG"** and the manager link (`#nav-git-sources`, →
  `/git-sources.html`) is labeled **"Sources"** — same ids, same hrefs,
  same order, same admin-only ship-hidden/reveal contract as before.

## Acceptance criteria
1. All six pages (`frontend/index.html`, `sources.html`,
   `git-sources.html`, `tuning.html`, `document.html`, `login.html`)
   carry the swapped label text on `#nav-sources` ("RAG") and
   `#nav-git-sources` ("Sources"). Element ids, `href`s, `hidden`
   defaults, `is-active`/`aria-current` markers, and the nav order
   (Chat, RAG, Sources, Tuning) are unchanged — this is a label-only
   rename, and `header.js` logic (reveal by id) is untouched.
2. Anonymous visitors still see neither link (ship-hidden contract
   unchanged); the admin sees both, as before.
3. Existing test assertions on the old label text are updated
   (`test_git_sources_admin.py` nav-link text,
   `test_mobile_hamburger_nav.py` `LINK_TEXTS`); assertions that are
   NOT about these two nav items stay untouched (the document viewer's
   "Sources" back button, the "Sync sources" button label, the
   `/git-sources.html` page-`<h1>`/`<title>` marker).
4. Story E2E `tests/e2e/test_nav_rename_sources.py` proves: admin sees
   "RAG" (→ `/sources.html`) and "Sources" (→ `/git-sources.html`) on
   all six pages; clicking each lands on the right page with
   `is-active`; anonymous sees both hidden.
5. Frontend-only: unit + integration green, `app/` coverage
   unaffected, ruff + pyright clean, no CDN, one `--no-gpg-sign` commit.

## Playwright Mapping Rule
`tests/e2e/test_nav_rename_sources.py` — one story, one file, run in
isolation: the two relabeled nav items' full lifecycle (labels, hrefs,
admin reveal, anonymous hide, click-navigation with the current-page
marker) on the shared header, desktop viewport.