## Summary
Removes the `ManageBankAccounts` Pennant feature flag that gated the
per-connection "Manage Accounts" surface to the admin user, making the
flow available to all users.
## Changes
- Delete the `App\Features\ManageBankAccounts` feature class.
- `ConnectionAccountController`: drop the `ensureFeatureEnabled()` gate
(3 call sites + method) and the `Feature`/`ManageBankAccounts` imports.
Access stays guarded by `authorizeConnection()` (connection ownership).
- `HandleInertiaRequests`: stop sharing the `manageBankAccounts` Inertia
flag.
- Frontend: remove the flag from the `Features` type, the
`features.manageBankAccounts` conditional in `connections.tsx` (now
gated solely by `canManageAccounts`), and the now-unused `features`
destructure.
- Tests: update `InertiaSharedDataTest` and the `connections.test.tsx`
mock; simplify the `adminUser()` helper to `onboardedUser()` in
`ConnectionAccountTest` and remove the "forbidden when feature disabled"
test.
## Testing
- `vendor/bin/pint --dirty` — pass
- `php artisan test tests/Feature/OpenBanking/ConnectionAccountTest.php
tests/Feature/InertiaSharedDataTest.php` — 17 passed
- `bunx vitest run resources/js/pages/settings/connections.test.tsx` —
pass
- `bun run lint` / `bun run format` — clean
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