feat: add multi-tenant system with properties, organizations, and public booking

Implement complete multi-property architecture:
- Properties (groups of spaces) with public/private visibility
- Property managers (many-to-many) with role-based permissions
- Organizations with member management
- Anonymous/guest booking support via public API (/api/public/*)
- Property-scoped spaces, bookings, and settings
- Frontend: property selector, organization management, public booking views
- Migration script and updated seed data

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

backend/app/services/booking_service.py

@@ -5,6 +5,7 @@ from sqlalchemy import and_
 from sqlalchemy.orm import Session
 
 from app.models.booking import Booking
+from app.models.property_settings import PropertySettings
 from app.models.settings import Settings
 from app.models.space import Space
 from app.utils.timezone import convert_from_utc, convert_to_utc
@@ -53,27 +54,43 @@ def validate_booking_rules(
         db.commit()
         db.refresh(settings)
 
-    # Fetch space and get per-space settings (with fallback to global)
+    # Fetch space and get per-space settings
+    # Resolution chain: Space → PropertySettings → Global Settings
     space = db.query(Space).filter(Space.id == space_id).first()
-    wh_start = (
-        space.working_hours_start
-        if space and space.working_hours_start is not None
-        else settings.working_hours_start
+
+    # Fetch property settings if space has a property
+    prop_settings = None
+    if space and space.property_id:
+        prop_settings = db.query(PropertySettings).filter(
+            PropertySettings.property_id == space.property_id
+        ).first()
+
+    def resolve(space_val, prop_val, global_val):
+        if space_val is not None:
+            return space_val
+        if prop_val is not None:
+            return prop_val
+        return global_val
+
+    wh_start = resolve(
+        space.working_hours_start if space else None,
+        prop_settings.working_hours_start if prop_settings else None,
+        settings.working_hours_start,
     )
-    wh_end = (
-        space.working_hours_end
-        if space and space.working_hours_end is not None
-        else settings.working_hours_end
+    wh_end = resolve(
+        space.working_hours_end if space else None,
+        prop_settings.working_hours_end if prop_settings else None,
+        settings.working_hours_end,
     )
-    min_dur = (
-        space.min_duration_minutes
-        if space and space.min_duration_minutes is not None
-        else settings.min_duration_minutes
+    min_dur = resolve(
+        space.min_duration_minutes if space else None,
+        prop_settings.min_duration_minutes if prop_settings else None,
+        settings.min_duration_minutes,
     )
-    max_dur = (
-        space.max_duration_minutes
-        if space and space.max_duration_minutes is not None
-        else settings.max_duration_minutes
+    max_dur = resolve(
+        space.max_duration_minutes if space else None,
+        prop_settings.max_duration_minutes if prop_settings else None,
+        settings.max_duration_minutes,
     )
 
     # Convert UTC times to user timezone for validation

backend/app/services/email_service.py

@@ -128,6 +128,58 @@ Motiv: {reason}
 
 Vă rugăm să contactați administratorul pentru detalii.
 
+Cu stimă,
+Sistemul de Rezervări
+"""
+
+    elif event_type == "anonymous_created":
+        guest_email = extra_data.get("guest_email", "N/A") if extra_data else "N/A"
+        subject = "Cerere Anonimă de Rezervare"
+        body = f"""Bună ziua,
+
+O nouă cerere anonimă de rezervare necesită aprobarea dumneavoastră:
+
+Persoana: {user_name}
+Email: {guest_email}
+Spațiu: {space_name}
+Data și ora: {start_str} - {end_str}
+Titlu: {booking.title}
+Descriere: {booking.description or 'N/A'}
+
+Vă rugăm să accesați panoul de administrare pentru a aproba sau respinge această cerere.
+
+Cu stimă,
+Sistemul de Rezervări
+"""
+
+    elif event_type == "anonymous_approved":
+        subject = "Rezervare Aprobată"
+        body = f"""Bună ziua {user_name},
+
+Rezervarea dumneavoastră a fost aprobată:
+
+Spațiu: {space_name}
+Data și ora: {start_str} - {end_str}
+Titlu: {booking.title}
+
+Vă așteptăm!
+
+Cu stimă,
+Sistemul de Rezervări
+"""
+
+    elif event_type == "anonymous_rejected":
+        reason = extra_data.get("rejection_reason", "Nu a fost specificat") if extra_data else "Nu a fost specificat"
+        subject = "Rezervare Respinsă"
+        body = f"""Bună ziua {user_name},
+
+Rezervarea dumneavoastră a fost respinsă:
+
+Spațiu: {space_name}
+Data și ora: {start_str} - {end_str}
+Titlu: {booking.title}
+Motiv: {reason}
+
 Cu stimă,
 Sistemul de Rezervări
 """