feat: multi-organization support + bank accounts

- Renamed singular /api/organization → CRUD /api/organizations
- New BankAccount table with CRUD under /api/organizations/:orgId/bank-accounts
- TochkaCredential gets optional bankAccountId for future per-account bank API config
- Active organization stored in cookie dm_org, /api/active-organization GET/POST
- activeOrgPlugin resolves req._orgId from cookie (or first non-archived as fallback)
- Migration 1_multiorg: BankAccount table + data backfill from legacy Organization.bank* fields
- Web: new /companies list + /companies/:id with tabs (Реквизиты, Банки и счета, Интеграции stub)
- Web: OrgSwitcher dropdown in header (active org + management link)
- Removed nav "Реквизиты", "Банк" — replaced by "Компании"
- Per-field error highlighting wired up on new forms

Existing organization data backfills cleanly: legacy bank* fields stay readable, but new
BankAccount becomes the source of truth going forward.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/tsconfig.tsbuildinfo

@@ -1 +1 @@
-{"root":["./src/app.tsx","./src/api.ts","./src/auth.ts","./src/main.tsx","./src/components/blockseditor.tsx","./src/components/clientpicker.tsx","./src/components/lineseditor.tsx","./src/components/ui.tsx","./src/lib/richtext.ts","./src/pages/clients.tsx","./src/pages/documentedit.tsx","./src/pages/documents.tsx","./src/pages/organization.tsx","./src/pages/services.tsx","./src/pages/templateedit.tsx","./src/pages/templates.tsx"],"version":"5.9.3"}
+{"root":["./src/app.tsx","./src/api.ts","./src/auth.ts","./src/main.tsx","./src/components/blockseditor.tsx","./src/components/clientpicker.tsx","./src/components/lineseditor.tsx","./src/components/orgswitcher.tsx","./src/components/ui.tsx","./src/lib/richtext.ts","./src/pages/clients.tsx","./src/pages/companies.tsx","./src/pages/companyedit.tsx","./src/pages/documentedit.tsx","./src/pages/documents.tsx","./src/pages/services.tsx","./src/pages/templateedit.tsx","./src/pages/templates.tsx"],"version":"5.9.3"}