PINK: Rust kernel atomic K/E account layer (AccountState + FFI)
AccountState in KernelCore/KernelSnapshot:
- K-values: seed_capital, k_realized_pnl, k_fees_paid, k_funding_net
- E-facts: e_wallet_balance, e_available_margin, e_used_margin, e_maint_margin
- Cached: k_capital, available_capital (E rules when present; K fallback)
- Reconcile: OK/WARN(<20)/ERROR(>=20 delta) runs atomically on every event
New FFI:
dita_kernel_set_seed_capital(handle, seed: f64) -> i32
dita_kernel_on_account_event_json(handle, payload) -> *char
Kinds: FILL_SETTLED | ACCOUNT_UPDATE | FUNDING_FEE
rust_backend.py: wires set_seed_capital() and on_account_event();
snapshot()[account] exposes both legacy and V2 fields.
Smoke-tested: fill->E_update->funding->re-sync all produce correct
K/E values and reconcile transitions (OK->OK->WARN->OK).
89/89 offline tests pass.
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