## Why
During the bank connection flow (Enable Banking) a user picks which
accounts to sync and can skip the rest. Until now there was **no way
back**: a skipped account couldn't be enabled later, a synced account
couldn't be moved or turned off, and accounts the bank added afterwards
were invisible. Skipped accounts aren't persisted anywhere —
`pending_accounts_data` is cleared once mapping completes — so the app
simply forgets they exist.
This adds a per-connection **Manage Accounts** screen that closes that
gap.
## What
- **Known accounts render from the DB** (no provider call). For each
synced account the user can:
- **Stop syncing** → the account is unlinked and becomes a regular
manual account. Non-destructive: it keeps all its imported transactions.
- **Change destination** → move syncing to another compatible manual
account (unlinks the previous holder, links the new one with incremental
sync).
- **Load accounts** button re-fetches the consent's account list from
the provider *on demand* (`getSession` + `getAccount` only for uids we
don't already know) to surface newly available / previously skipped
accounts, which can then be created as new accounts or linked to
existing manual ones.
- The provider is **only ever hit on refresh**; every mutation is
DB-only, so the screen still works (read + rearrange) when the consent
has expired.
### Design notes
- No new column / cache: the default view derives entirely from the
`accounts` table, and refresh is on-demand and ephemeral. Re-fetching is
mandatory anyway (existing connections have no stored snapshot, and only
a live call can reveal accounts the bank added later).
- Scoped to **Enable Banking** for now; the approach is column-free so
extending to the crypto/API-key providers later is trivial.
## Endpoints
- `GET open-banking/connections/{connection}/accounts` — manage screen
(`discoveredAccounts` computed only when `?refresh=1`)
- `POST open-banking/connections/{connection}/accounts/map` — create /
link / change destination for one bank account
- `POST open-banking/connections/{connection}/accounts/{account}/unlink`
— stop syncing
## Testing
- New `ConnectionAccountTest` (7 tests): index props, refresh discovery
(excludes already-synced uids), create,
change-destination/unlink-previous, non-destructive unlink keeps
transactions, ownership 403, account-mismatch 404.
- Full `tests/Feature/OpenBanking` suite green (268), plus pint, eslint,
prettier and the enforced `es` localization test.
## Deliberately skipped
- **Subscription gating** on refresh/map — matches the currently ungated
`disconnect`. Easy follow-up if free users shouldn't trigger live
provider calls.
- Other providers (Enable Banking only, as agreed).
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