Initial commit: Buildfor Life Budget app

Multi-company budget/project tracking tool built with SvelteKit 5,
PostgreSQL (Drizzle ORM), and Tailwind CSS v4.

Features:
- Auth: local (email/password with Argon2) + generic OIDC
- 4 roles per company: admin, manager, user, viewer
- Multi-company with per-company user membership
- Projects with budget allocation from company pool
- Expense submission with approval workflow
- Categories and tags for expense organization
- Reports with spending breakdowns (by category, project, time)
- CSV import for Actual Budget migration
- Company audit log tracking all budget and admin actions
- Remaining budget hero display on overview and budget pages
- Admin-only company creation; new users wait for invitation
- Deployment configs for systemd + nginx (bare metal/Proxmox)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/app.d.ts

@@ -0,0 +1,20 @@
+declare global {
+	namespace App {
+		interface Locals {
+			user: {
+				id: string;
+				email: string;
+				username: string | null;
+				displayName: string | null;
+				isSystemAdmin: boolean;
+			} | null;
+			session: {
+				id: string;
+				expiresAt: Date;
+				fresh: boolean;
+			} | null;
+		}
+	}
+}
+
+export {};