feat: fix backend SQL columns, add dark/light theme, fix legacy CSS

- Fix 7 backend controllers: rename columns to match actual DB schema
  (name_room→room_number, id_room→id, bed_type→room_type,
   id_employee→id, status_employee→status)
- Fix 10 frontend files with matching property renames
- Add ThemeContext with dark/light toggle (localStorage persisted)
- Redesign theme.css with [data-theme] attribute selectors
- Add Google Fonts (Syne, DM Sans, JetBrains Mono)
- Redesign sidebar, topbar, and login page CSS
- Migrate ~44 legacy CSS files from hardcoded colors to CSS variables
- Remove Dashboards/Tableros section from menu
- Clean up commented-out CSS blocks across codebase

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

.claude/settings.local.json

@@ -7,7 +7,26 @@
       "Bash(git commit:*)",
       "Bash(git remote add:*)",
       "Bash(git push:*)",
-      "Bash(cat:*)"
+      "Bash(cat:*)",
+      "Bash(git -C /root/SistemaHotel status)",
+      "Bash(git -C /root/SistemaHotel add backend/hotel_hacienda/src/db/migrations/001_front_office_tables.sql)",
+      "Bash(git -C /root/SistemaHotel commit -m \"$\\(cat <<''EOF''\nfeat: add database migration for front-office tables\n\nCo-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>\nEOF\n\\)\")",
+      "Bash(git -C /root/SistemaHotel check-ignore -v backend/hotel_hacienda/src/db/migrations/001_front_office_tables.sql)",
+      "Bash(git -C /root/SistemaHotel add backend/hotel_hacienda/src/db/migrations/001_front_office_tables.sql .gitignore)",
+      "Bash(git -C /root/SistemaHotel log --oneline -3)",
+      "Bash(npm install:*)",
+      "Bash(git init:*)",
+      "Bash(git -C /root/SistemaHotel log --oneline -5)",
+      "Bash(git -C /root/SistemaHotel diff backend/hotel_hacienda/src/app.js frontend/Frontend-Hotel/src/App.jsx frontend/Frontend-Hotel/src/constants/menuconfig.js)",
+      "Bash(psql:*)",
+      "Bash(systemctl is-active:*)",
+      "Bash(service docker:*)",
+      "Bash(ip addr:*)",
+      "Bash(docker compose:*)",
+      "Bash(apt-get update:*)",
+      "Bash(apt-get:*)",
+      "Bash(docker:*)",
+      "Bash(python3:*)"
     ]
   }
 }