feat: TKB shift scheduler — personnel shift planning web app

Full rewrite of METRO HMG for TKB tunnel department:
- People-based grid (18 TKB + 5 IT), year-long calendar
- Color-coded shift values (4/6/8/12/A/B/D/N/U/O)
- Drag-and-drop cells, multi-cell selection (click/ctrl/shift/drag)
- Right-click context menu with color palette
- Tunnel closure + Metro + D8 info rows (toggleable)
- Czech holidays highlighted with names
- PDF export (2-page A4 landscape, DejaVu font for Czech chars)
- Improvement proposals system
- Sticky headers (vertical + horizontal scroll)
- Cell value filter toggles in legend

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/watch-deploy.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+# Watch for changes in src/ and auto-deploy to copelk
+# Run: ./watch-deploy.sh
+# Stop: Ctrl+C
+
+WATCH_DIR="/home/klas/Prace/METRO/web/src"
+DEPLOY_SCRIPT="/home/klas/Prace/METRO/web/deploy.sh"
+COOLDOWN=10
+
+echo "Watching $WATCH_DIR for changes..."
+echo "Auto-deploying to copelk on save"
+echo "Press Ctrl+C to stop"
+
+inotifywait -m -r -e modify,create,delete "$WATCH_DIR" |
+while read -r dir event file; do
+  echo ""
+  echo "[$(date +%H:%M:%S)] Change detected: $file ($event)"
+  echo "Deploying in ${COOLDOWN}s (waiting for more changes)..."
+  sleep $COOLDOWN
+  # Drain any queued events
+  while read -t 0.1 -r _; do :; done
+  echo "Deploying..."
+  bash "$DEPLOY_SCRIPT"
+  echo ""
+  echo "Watching for next change..."
+done