* feat(mobile): add transaction metadata editing
* fix(mobile): preserve explicit metadata clears
* fix(mobile): derive persisted tag metadata state
* fix(mobile): avoid logging transaction details
* fix(mobile): harden transaction edit sync
Pass the edited transaction context through provider updates, refresh or fall back after empty update responses, surface field-level API errors, and avoid forced metadata refetches on every edit screen open.
* fix(mobile): keep transaction edit selects ci-compatible
Use the DropdownButtonFormField API supported by the Flutter version pinned in upstream mobile CI.
