177975c70c
Reverted sticky header attempt back to clean two-column layout. Server now sends no-cache headers for all static files. Working features: - People grid (18 TKB + 5 IT) with year-long calendar - Shift codes (4/6/8/12/A/B/D/N/U/O) with auto-colored backgrounds - Drag-and-drop cells (including color-only cells) - Multi-cell selection (click/ctrl/shift/drag) with bulk operations - Right-click context menu: set value, color palette, comments - Info rows: TKB, Metro, D8 (toggleable) - Czech holidays highlighted with names - Cell value filter toggles in legend - PDF export (2-page A4 landscape, Czech font support) - Improvement proposals system - Auto-contrast text color on manual backgrounds - Opens at current month on load TODO: sticky header (needs different approach) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>