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

dwg-counting/excel_export.py

@@ -0,0 +1,41 @@
+"""Export symbol count results to XLSX."""
+from openpyxl import Workbook
+from openpyxl.styles import Font, PatternFill, Alignment
+
+
+def export_to_excel(results: list[dict], filename: str, out_path: str) -> None:
+    """results = [{id, description, count, confidence, notes}, ...]"""
+    wb = Workbook()
+    ws = wb.active
+    ws.title = "Symboly"
+
+    headers = ["Symbol", "Popis", "Počet", "Spolehlivost", "Poznámka"]
+    ws.append(headers)
+    for cell in ws[1]:
+        cell.font = Font(bold=True, color="FFFFFF")
+        cell.fill = PatternFill("solid", fgColor="2563EB")
+        cell.alignment = Alignment(horizontal="center")
+
+    for r in results:
+        ws.append([
+            r.get("id", ""),
+            r.get("description", ""),
+            r.get("count", 0),
+            r.get("confidence", ""),
+            r.get("notes", ""),
+        ])
+
+    # Auto-width
+    widths = [16, 60, 10, 14, 40]
+    for i, w in enumerate(widths, 1):
+        ws.column_dimensions[chr(64 + i)].width = w
+
+    # Total row
+    total = sum(int(r.get("count", 0) or 0) for r in results)
+    ws.append([])
+    last = ws.max_row + 1
+    ws.append(["", f"Celkem ({filename})", total, "", ""])
+    ws[f"B{last+1}"].font = Font(bold=True)
+    ws[f"C{last+1}"].font = Font(bold=True)
+
+    wb.save(out_path)