## What & why
Until now only the **category, notes, labels and (for manual
transactions) the description** could be changed after a transaction was
created — the **amount and date were immutable and the account was
create-only**. Users creating transactions by hand had no way to fix a
wrong amount or date.
This lets **manually created transactions edit every field at any time
after creation**: account, date, description and amount, on top of
category/labels/notes. **Imported / bank-synced transactions keep
amount, date, account, currency and description locked** to their source
data.
## Changes
**Backend**
- `UpdateTransactionRequest` now validates `amount`, `transaction_date`,
`account_id` and `currency_code` **only when the transaction's `source`
is `manually_created`**. For imported transactions those keys are not
validated, so `validated()` drops them and they can't be changed even
via a crafted request.
- `TransactionController::update()` moves the manual account balance to
match an edited amount/date/account, **opt-in via the same
`update_balance` flag used by create/delete**. It snapshots the pre-edit
state, and only rebalances when one of amount/date/account actually
changed. Connected accounts are skipped inside the adjuster.
- `ManualBalanceAdjuster` was refactored to a shared private `adjust()`
primitive (removing duplication between the existing create/delete
paths) and gains `reverseCreatedTransaction()` so an edit can reverse
the old contribution and apply the new one.
**Frontend**
- `edit-transaction-dialog.tsx` unifies the create/edit editability
decision behind a single `canEditAllFields` flag and renders the
account, date and amount inputs (plus the "update account balance"
checkbox) when editing a manual transaction.
- `transaction-sync.ts` `update()` gains an `{ updateBalance }` option,
mirroring `create()`.
## Known limitation (by design)
Like create/delete, the balance update trusts the opt-in flag and nudges
a **single dated snapshot** — it doesn't cascade to later snapshots and
keeps no record of whether creation adjusted the balance. So it's exact
for the common case (recent transaction, flag used consistently) and can
drift otherwise. This matches the app's existing snapshot-based balance
model; a transaction-derived balance would be a separate, larger change.
Documented with a `ponytail:` comment at the call site.
## Tests
- **Feature (`tests/Feature/TransactionTest.php`)**: manual transaction
edits amount/date/account/currency; imported transaction cannot; balance
moves by the delta on amount change; no change when not requested;
moving between accounts reverses the old and credits the new;
currency-only edit doesn't rebalance; connected accounts never change.
All green locally (55 passed).
- **Component (`edit-transaction-dialog.test.tsx`)**: manual transaction
shows editable amount/date/description; imported keeps them read-only.
## QA
Real browser QA (Playwright) against the running app with the
`demo@whisper.money` data:
- Opened a manual transaction → edited date, description and amount,
kept "update account balance" checked, saved. Verified in the DB:
`amount -4200 → -7550`, `date 2026-07-10 → 2026-07-12`, description
updated, and the account balance snapshots moved accordingly.
- Opened an imported transaction → amount and description render
read-only (locked).
## Demo
https://github.com/user-attachments/assets/1c8790e8-31f5-4283-b260-353650ad007c
a873582191