feat(chat): share a chat by link — anonymous read-only /shared/<token> page, share/unshare

tests/unit/test_frontend_brand.py

@@ -29,6 +29,7 @@ HTML_PAGES = (
     "login.html",
     "git-sources.html",
     "history.html",  # phase 50: the admin saved-chats page
+    "shared.html",  # phase 51: the anonymous shared-conversation page
 )
 
 
@@ -138,9 +139,13 @@ def test_every_page_loads_brand_js_before_its_module_script() -> None:
     default must be set first)."""
     for page in HTML_PAGES:
         html = _text(FRONTEND / page)
-        brand_idx = html.find('<script src="assets/brand.js"></script>')
+        # Optional leading slash: root-level pages use "assets/brand.js",
+        # but the shared page is served from the NESTED /shared/<token>
+        # route, where a relative ref would 404 — it uses "/assets/…".
+        m = re.search(r'<script src="(?:/)?assets/brand\.js"></script>', html)
+        assert m, f"{page}: brand.js must load"
+        brand_idx = m.start()
         module_idx = html.find('<script type="module"')
-        assert brand_idx != -1, f"{page}: brand.js must load"
         assert module_idx != -1, f"{page}: the page module must load"
         assert brand_idx < module_idx, (
             f"{page}: brand.js must load BEFORE the module script"