Implement Phase 2 features: roles, assessment groups, budget import, Kanban

- Add hierarchical roles: SuperUser Admin (is_superadmin flag), Tenant Admin,
  Tenant User with separate /admin route and admin panel
- Add Assessment Groups module for property type-based assessment rates
  (SFHs, Condos, Estate Lots with different regular/special rates)
- Enhance Chart of Accounts: initial balance on create (with journal entry),
  archive/restore accounts, edit all fields including account number & fund type
- Add Budget CSV import with downloadable template and account mapping
- Add Capital Projects Kanban board with drag-and-drop between year columns,
  table/kanban view toggle, and PDF export via browser print
- Update seed data with assessment groups, second test user, superadmin flag
- Create repeatable reseed.sh script for clean database population
- Fix AgingReportPage Mantine v7 Table prop compatibility

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

db/init/00-init.sql

@@ -42,6 +42,7 @@ CREATE TABLE shared.users (
     oauth_provider VARCHAR(50),
     oauth_provider_id VARCHAR(255),
     last_login_at TIMESTAMPTZ,
+    is_superadmin BOOLEAN DEFAULT FALSE,
     created_at TIMESTAMPTZ DEFAULT NOW(),
     updated_at TIMESTAMPTZ DEFAULT NOW()
 );
@@ -51,7 +52,7 @@ CREATE TABLE shared.user_organizations (
     id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
     user_id UUID NOT NULL REFERENCES shared.users(id) ON DELETE CASCADE,
     organization_id UUID NOT NULL REFERENCES shared.organizations(id) ON DELETE CASCADE,
-    role VARCHAR(50) NOT NULL CHECK (role IN ('president', 'treasurer', 'secretary', 'member_at_large', 'manager', 'homeowner')),
+    role VARCHAR(50) NOT NULL CHECK (role IN ('president', 'treasurer', 'secretary', 'member_at_large', 'manager', 'homeowner', 'admin', 'viewer')),
     is_active BOOLEAN DEFAULT TRUE,
     joined_at TIMESTAMPTZ DEFAULT NOW(),
     UNIQUE(user_id, organization_id)