## Problem
`AccountController@show` (added in #631) loaded the **full transaction
ledger** for an account into the initial Inertia payload on every visit
— `transactions()->with(['category','labels'])->get()`. For accounts
with years of movements that's several MB, all on the critical render
path, blocking first paint. The `ponytail:` comment flagged the
deferred/cursor move as a follow-up; this PR does it.
## Fix
Wrap the `transactions` prop in `Inertia::defer(...)` so the page shell
(header, chart, actions) paints immediately and the ledger arrives in a
follow-up request behind a skeleton. Mirrors how `index()` already
defers `accountMetrics` and how `dashboard.tsx` consumes `<Deferred>`.
The ledger **stays the whole set on purpose** — search and filtering run
client-side over *decrypted* rows (privacy-first design), so the client
needs every row. Cursor/offset pagination isn't viable without breaking
search over encrypted fields, so deferred is the right lever: it moves
the cost off the critical path rather than reducing bytes.
Non-transactional account types
(`loan`/`investment`/`retirement`/`real_estate`, i.e.
`!hasTransactionLedger()`) return a plain `[]` and never render
`<Deferred>`, so they take no extra round-trip.
## Testing
- `AccountControllerTest`: the "includes transactions" case migrated
from `->has('transactions', 2)` to
`->missing('transactions')->loadDeferredProps(...)`, proving the prop is
deferred yet resolves.
- `Show.test.tsx`: added coverage that creating a transaction reloads
**only** the deferred prop (`router.reload({ only: ['transactions'] })`)
— this refresh became load-bearing on deferred-prop semantics once the
remount `key` was dropped in #631.
- `php artisan test` (AccountController + PageQueryCount): 45 passed.
Vitest Show: 3 passed. Pint + ESLint clean.
## Reviewer notes
- **Known minor (not fixed):** brief loading-skeleton shape change on
first load — the `<Deferred>` fallback (plain bars) differs from
`TransactionList`'s own internal table skeleton, so there's a ~1-frame
visual jump. Aligning them would mean either duplicating the table
skeleton or adding a prop to the shared component; judged not worth it
for a sub-frame cosmetic nit.
- **Out of scope (pre-existing, from #631, flagged during review):**
since #631 removed the remount `key`, an active filter/search now
persists across a create-reload (a new non-matching row can look "not
created"); and in-memory search/sort currently operates on
still-encrypted rows pending the plaintext migration. Neither is
introduced or worsened here.
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