feat(reconciliation): manual adapter for the whole balance sheet (Reko bilagor, PR 1) (#1854)

* feat(reconciliation): manual adapter so the whole balance sheet is reconcilable and signable (Reko bilagor, PR 1)

Every class 1-2 account the bank and skattekonto adapters do not own now
appears on the Avstämning page under "Övriga balanskonton" with IB, movement
and UB through the balansdag, a system specification where one exists
(1510 kundreskontra, 2440 leverantörsreskontra, 2920/2940 semesterlöneskuld)
and, for every other account, the balance the signer states from their
underlag at sign-off. Same three doors as before: dashboard routes, v1 API
and the MCP tools take manual:<BAS> keys and an external_balance.

The ledger side is computed per fiscal period via generateTrialBalance,
never as an all-history sum: year-end re-books every balance account in an
opening_balance verifikat, so an all-history sum counts a closed year twice.

A stated external_balance is refused (EXTERNAL_BALANCE_NOT_ALLOWED) wherever
the system already has an outside truth, so it can never hide a difference.

No migration: account_reconciliations already accepts manual:NNNN keys.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RvFveUpbdPBXdm7f5FEYoz

* chore(api-skill): regenerate banking reference for the sign-off external_balance field

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RvFveUpbdPBXdm7f5FEYoz

---------

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

DECISIONS.md

@@ -1194,3 +1194,4 @@ One line per decision: `[YYYY-MM-DD] <decision>: <why>`. Appended by agents and
 [2026-08-24] Single-call chat console (general.help, AskConsole → /api/agent/ask) now carries the thread's earlier turns into every model call, via a new optional `history` on the provider-agnostic GenerateTextRequest (real message turns before the prompt in BOTH adapters: Anthropic-family messages array, OpenAI-compatible via AI SDK `messages`; an absent/empty history leaves the request byte-identical to the single-turn call, so hosted extraction and every other caller are untouched). The 08-20 RIP-3 cutover made each turn stateless (conversationId was only the tool actor id), so a follow-up in a resumed thread was answered blind (user report: "frågar vad jag refererar till"). History is loaded server-side from agent_messages (loadChatHistory: text only, hidden + tool rows dropped, alternation repaired, newest 16 rows / 10k chars) rather than sent by the client, so the client cannot forge earlier turns and old streaming threads replay cleanly. Rejected: inlining a transcript into the prompt (works everywhere but weaker turn semantics and blurs data vs instructions) and loading history in AskConsole (client-trusted history). Separately: the docked assistant panel now remembers its open thread per tab in sessionStorage (lib/agent-panel/session-restore) and reopens it after a full reload (the deploy prompt's "Ladda om" wiped it); sessionStorage, not user_preferences, because this is this-tab-this-session state that must not follow the user to other devices or tabs. And DeployReloadPrompt's full-width wrapper gets pointer-events-none: at z-[60] after the panel in DOM order it swallowed clicks on the panel's composer ("går ej att skriva").
 [2026-08-25] /reports/bank-reconciliation retired behind a redirect to /reconciliation instead of kept as a "power" page: everything it did (matcher, manual N:1 matching, residual booking, IB tag, move-to-account) lives on the account-keyed page, and two reconciliation surfaces meant two truths. The catalog slug stays so old links, the report library and ?autorun=1 deep links keep working.
 [2026-08-25] reconciliation_residual staged op tiered 'medium', not create_voucher's 'high': it books one typed verifikat (6570/8410/8310/3740 vs bank) bounded by RESIDUAL_MAX_AMOUNT and is undone by storno + unmatch, i.e. the same blast radius as categorize_transaction. Scope is transactions:write (same as the v1 route) because it writes the ledger.
+[2026-08-24] Manual reconciliation adapter (Reko bilagor, PR 1) computes the ledger side per fiscal period via generateTrialBalance (IB + movement through the balansdag), never as an all-history sumAccountBalance: year-end posts an opening_balance verifikat that re-books every balance account in the new year, so an all-history sum counts a closed year twice. Reskontra/semesterskuld specifications are "per idag" (open items now), labeled so in the bridge; a per-date reskontra is a follow-up. A typed external_balance is accepted only on manual accounts without a system specification (EXTERNAL_BALANCE_NOT_ALLOWED elsewhere): letting a stated number override the bank, Skatteverket or the reskontra would hide the very difference the sign-off exists to record.