feat: add catastro SSOT integration, 3DGS hybrid pipeline, casa demo v3

- SPEC: add User Story 0 (Property Setup via Catastro) as P1 entry
- SPEC: add catastro_data and catastro_imports tables to data model
- PLAN: add Phase 2A (Catastro Integration) with 8 tasks
- AGENTS.md: add 3 key decisions (Catastro SSOT, 3DGS hybrid, plan inputs)
- Demo v3: Spanish apartment (C/ Altabix 24, 3ºB, Elche), 7 rooms,
  upload panel for catastro/DXF, proper collisions on all doors

setup-samba.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+# Setup Samba share for ~/projects (InteriorScan and other repos)
+# Run with: sudo bash ~/projects/interiorscan/setup-samba.sh
+
+set -e
+
+echo "=== Setting up Samba share for ~/projects ==="
+
+# 1. Add share to smb.conf
+if ! grep -q "\[projects\]" /etc/samba/smb.conf; then
+  cat >> /etc/samba/smb.conf << 'EOF'
+
+[projects]
+   comment = Development Projects
+   path = /home/monyi/projects
+   browseable = yes
+   read only = no
+   guest ok = yes
+   create mask = 0664
+   directory mask = 0775
+   force user = monyi
+EOF
+  echo "✓ Share [projects] added to smb.conf"
+else
+  echo "⚠ Share [projects] already exists in smb.conf"
+fi
+
+# 2. Set permissions on projects dir
+chmod -R 775 /home/monyi/projects 2>/dev/null || true
+echo "✓ Permissions set on /home/monyi/projects"
+
+# 3. Test config
+echo ""
+echo "Testing Samba config..."
+testparm -s 2>/dev/null | grep -A5 "\[projects\]" || echo "Run 'sudo testparm' to verify"
+
+# 4. Restart Samba
+echo ""
+echo "Restarting Samba services..."
+systemctl restart smbd nmbd 2>/dev/null || service smbd restart 2>/dev/null || echo "⚠ Could not restart smbd — run: sudo systemctl restart smbd nmbd"
+
+echo ""
+echo "=== Done! ==="
+echo "From Windows, open: \\\\192.168.1.13\\projects"
+echo "Or in File Explorer: \\\\192.168.1.13\\projects"
+echo ""
+echo "The demo.html is at: \\\\192.168.1.13\\projects\\interiorscan\\demo.html"