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>

deploy/nginx.conf

@@ -0,0 +1,43 @@
+server {
+    listen 80;
+    server_name budget.b4l.co.th;
+    return 301 https://$host$request_uri;
+}
+
+server {
+    listen 443 ssl http2;
+    server_name budget.b4l.co.th;
+
+    ssl_certificate     /etc/letsencrypt/live/budget.b4l.co.th/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/budget.b4l.co.th/privkey.pem;
+
+    # Security headers
+    add_header X-Frame-Options DENY;
+    add_header X-Content-Type-Options nosniff;
+    add_header Referrer-Policy strict-origin-when-cross-origin;
+
+    # Compression
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml;
+    gzip_min_length 1000;
+
+    location / {
+        proxy_pass http://127.0.0.1:3000;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Forwarded-Host $host;
+        proxy_cache_bypass $http_upgrade;
+    }
+
+    # Cache immutable static assets
+    location /_app/immutable/ {
+        proxy_pass http://127.0.0.1:3000;
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+}