Add events module with dashboard UI, scheduling, signups, and settings updates; extend env/readme.

tmp_check.py

@@ -0,0 +1,9 @@
+from pathlib import Path
+raw = Path('src/services/ticketService.ts').read_bytes()
+print('len', len(raw))
+try:
+    raw.decode('utf-8')
+    print('utf8 ok')
+except Exception as e:
+    print('decode error', e)
+    print(raw[e.start:e.start+12])