Adds multi-tenant organisation support inside the existing finance namespace.
Users can create organisations, invite others via a copy-paste token link,
and manage teams/members with RBAC (admin, finance, member, viewer).
Fiscal year lifecycle is gated: activation requires all planned events to
be approved first. All org data lives in `org_`-prefixed MongoDB collections.
New files:
- models_org.go — domain types (Org, OrgTeam, OrgMember, OrgInvite,
FiscalYear, OrgEvent, BudgetLine, EventComment,
TxRequest with full StatusLog audit trail, etc.)
- store_org.go — MongoDB store methods for all org collections
- handler_org.go — HTTP handlers + RegisterOrgRoutes(); join invite
route lives at /join/{token} to avoid ServeMux
conflict with /orgs/{slug}/... wildcard routes
- templates/org_*.html — list, create, home, teams, members, invite, join
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
6ed848a001