Add personal notes, DeepSearch history, backup offload, and gateway auth throttling

Also streamline the top navigation: drop the Tools dropdown, make Quizzes
and Battles icon-only entries, and remove the Workspace, Containers and
Editor entry points from the project detail page.

tests/e2e/battles/index.py

@@ -52,7 +52,7 @@ def test_battles_page_lists_cards(alice):
     _seed_war("Vikings", "Knights")
     page.goto(f"{BASE_URL}/battles", wait_until="domcontentloaded")
     page.locator("dp-opinion-war").first.wait_for(state="visible")
-    expect(page.locator(".topnav-link.active:has-text('Battles')")).to_be_visible()
+    expect(page.locator(".topnav-icon.active[href='/battles']")).to_be_visible()
     expect(page.locator("dp-opinion-war .war-vs").first).to_have_text("VS")