feat: Czech day name format 'Pondělí (20.2)' in canvas + PDF; wider date column

app/core/pdf_generator.py

@@ -45,6 +45,20 @@ def is_light(hex_color: str) -> bool:
     return (0.299 * r + 0.587 * g + 0.114 * b) > 0.6
 
 
+_CS_WEEKDAYS = ['Pondělí', 'Úterý', 'Středa', 'Čtvrtek', 'Pátek', 'Sobota', 'Neděle']
+
+
+def format_date_cs(date_str: str) -> str:
+    """Format date as 'Pondělí (20.2)'."""
+    from datetime import date as dt_date
+    try:
+        d = dt_date.fromisoformat(date_str)
+        weekday = _CS_WEEKDAYS[d.weekday()]
+        return f"{weekday} ({d.day}.{d.month})"
+    except Exception:
+        return date_str
+
+
 def time_to_min(s: str) -> int:
     parts = s.split(':')
     return int(parts[0]) * 60 + int(parts[1])
@@ -153,7 +167,7 @@ def generate_pdf(doc) -> bytes:
 
     FOOTER_H = 10
     TIME_AXIS_H = 18
-    DATE_COL_W = 18 * mm
+    DATE_COL_W = 28 * mm  # wider for Czech day names like "Pondělí (20.2)"
 
     # Available area for the timetable grid
     avail_h = PAGE_H - 2 * MARGIN - header_h - LEGEND_H - FOOTER_H - TIME_AXIS_H - 6
@@ -248,7 +262,7 @@ def generate_pdf(doc) -> bytes:
 
         # Date label cell
         fill_rect(c, x0, row_y, DATE_COL_W, row_h, AXIS_BG, BORDER, 0.4)
-        draw_clipped_text(c, date_key, x0, row_y, DATE_COL_W, row_h,
+        draw_clipped_text(c, format_date_cs(date_key), x0, row_y, DATE_COL_W, row_h,
                           'Helvetica-Bold', date_font, AXIS_TEXT, 'center')
 
         # Vertical grid lines (15-min slots, hour lines darker)