feat: refactor to FastAPI architecture v2.0

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

app/api/pdf.py

@@ -0,0 +1,56 @@
+"""PDF generation API endpoint."""
+
+from io import BytesIO
+
+import pandas as pd
+from fastapi import APIRouter, HTTPException
+from fastapi.responses import StreamingResponse
+
+from app.models.event import ScenarioDocument
+from app.core.validator import validate_inputs, ValidationError, ScenarsError
+from app.core.pdf_generator import generate_pdf
+
+router = APIRouter()
+
+
+@router.post("/generate-pdf")
+async def generate_pdf_endpoint(doc: ScenarioDocument):
+    """Generate PDF timetable from ScenarioDocument."""
+    try:
+        validate_inputs(doc.event.title, doc.event.detail, 0)
+    except ValidationError as e:
+        raise HTTPException(status_code=422, detail=str(e))
+
+    # Convert to DataFrame
+    rows = []
+    for block in doc.blocks:
+        rows.append({
+            'Datum': block.datum,
+            'Zacatek': block.zacatek,
+            'Konec': block.konec,
+            'Program': block.program,
+            'Typ': block.typ,
+            'Garant': block.garant,
+            'Poznamka': block.poznamka,
+        })
+
+    df = pd.DataFrame(rows)
+
+    if df.empty:
+        raise HTTPException(status_code=422, detail="No blocks provided")
+
+    # Build program descriptions and colors
+    program_descriptions = {pt.code: pt.description for pt in doc.program_types}
+    program_colors = {pt.code: 'FF' + pt.color.lstrip('#') for pt in doc.program_types}
+
+    try:
+        pdf_bytes = generate_pdf(df, doc.event.title, doc.event.detail,
+                                 program_descriptions, program_colors)
+    except ScenarsError as e:
+        raise HTTPException(status_code=422, detail=str(e))
+
+    return StreamingResponse(
+        BytesIO(pdf_bytes),
+        media_type="application/pdf",
+        headers={"Content-Disposition": "attachment; filename=scenar_timetable.pdf"}
+    )