**Stack 5.2/6** of the TanStack Start migration (#46424) — second half
of the project routes (S5 was split for CodeRabbit's 150-file cap).
Stacked on **#47117** (5.1).
> [!NOTE]
> Same shape as 5.1 — thin route wrappers over the existing pages-router
components. With this PR every route is present, so `routeTree.gen.ts`
is now **byte-identical to the migration branch**.
## What's in this PR
- **Remaining project routes:** auth, logs, settings, observability,
functions, advisors, project-level integrations.
- **Supporting edits:** hoist `EdgeFunctionsIndexPageWrapper` out of
`getLayout`, `functions/secrets`, and move `DefaultLayout` to the root
for the logs page.
- `routeTree.gen.ts` regenerated for the full set.
## Verification
On top of S1–5.1: `studio` typecheck ✓, lint (0 errors) ✓, **Next build
✓ (181/181 pages)**.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Refactor**
* Reorganized internal routing and page structure to improve navigation
and maintainability across project settings, logs, functions,
authentication, integrations, and observability sections.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Alaister Young <10985857+alaister@users.noreply.github.com>
Co-authored-by: Ivan Vasilov <vasilov.ivan@gmail.com>
