Initial portal commit: landing + 9 AI-powered apps

Apps:
- dwg-rooms: extract room numbers from DWG/DXF
- dwg-counting: count symbols in PDF drawings (OpenCV template matching)
- contract-check: review PDF contracts against a checklist (Claude vision + Tesseract OCR fallback)
- email-drafter: bullet notes → polished Czech/English business emails
- invoice-extractor: PDF/image invoice → structured data → Excel
- translator: Czech-first translator across 19 languages with tone control
- vv-check: find inconsistent unit prices across VV sheets in one workbook
- vv-compare: diff original vs new VV files (changes / added / removed)
- feature-request: portal users submit ideas + sample files

Infrastructure:
- LiteLLM gateway with per-app virtual keys + budgets
- Langfuse observability
- Geist font, shared theme, cross-subdomain back link + theme sync via cookie/URL
- Caddy reverse proxy on *.klas.chat

email-drafter/docker-compose.yml

@@ -0,0 +1,19 @@
+services:
+  email-drafter:
+    build: .
+    container_name: email-drafter
+    restart: unless-stopped
+    ports:
+      - "127.0.0.1:3028:8000"
+    environment:
+      LITELLM_BASE_URL: ${LITELLM_BASE_URL:-http://host.docker.internal:4000/v1}
+      LITELLM_API_KEY:  ${LITELLM_API_KEY:-}
+      LLM_MODEL:        ${LLM_MODEL:-anthropic/claude-sonnet-4-20250514}
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+    networks:
+      - localai
+
+networks:
+  localai:
+    external: true