fix(calendar): distinguish blocked slots from booked ones

_isOccupied matched any service on the slot regardless of status. Unblocking
sets the service to cancelled, so a released slot still rendered as occupied
and the unblock looked like it did nothing. Cancelled and denied services are
now ignored, and self-booked slots get their own "Bloqueado" state with a
release action, mirroring the web.

Self-booking now spans the professional's configured slot duration instead of
a hardcoded two hours, which no longer matched the generated slots.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

lib/screens/professional/professional_calendar_screen.dart

@@ -14,6 +14,7 @@ import 'package:table_calendar/table_calendar.dart';
 const _kPrimary = Color(0xFF1565C0);
 const _kAvailable = Color(0xFF16A34A);
 const _kOccupied = Color(0xFFDC2626);
+const _kBlocked = Color(0xFF7C3AED);
 
 extension _Th on BuildContext {
   ThemeData get _t => Theme.of(this);
@@ -82,7 +83,8 @@ class _ProfessionalCalendarScreenState
     final slots = _buildSlots(schedule);
     final occupied =
         slots.where((t) => _isOccupied(t, _services, today)).length;
-    final available = slots.length - occupied;
+    final blocked = slots.where((t) => _isBlocked(t, _services, today)).length;
+    final available = slots.length - occupied - blocked;
 
     return Scaffold(
       backgroundColor: context.bg,
@@ -117,8 +119,8 @@ class _ProfessionalCalendarScreenState
                 if (_loadFailed)
                   _loadErrorState(context)
                 else ...[
-                  _dayHeader(
-                      context, schedule, slots.length, occupied, available),
+                  _dayHeader(context, schedule, slots.length, occupied,
+                      blocked, available),
                   if (slots.isEmpty)
                     _emptyState(context)
                   else
@@ -209,7 +211,7 @@ class _ProfessionalCalendarScreenState
   }
 
   Widget _dayHeader(BuildContext context, ScheduleEntity? schedule, int total,
-      int occupied, int available) {
+      int occupied, int blocked, int available) {
     final dayName = DateFormat('EEEE', 'es').format(today);
     final dateStr = DateFormat('d MMMM yyyy', 'es').format(today);
     final hasSchedule = schedule != null && schedule.enabled && total > 0;
@@ -261,6 +263,11 @@ class _ProfessionalCalendarScreenState
         if (hasSchedule) ...[
           _StatPill(label: '$occupied', sublabel: 'ocupadas', color: _kOccupied),
           const SizedBox(width: 8),
+          if (blocked > 0) ...[
+            _StatPill(
+                label: '$blocked', sublabel: 'bloqueadas', color: _kBlocked),
+            const SizedBox(width: 8),
+          ],
           _StatPill(
               label: '$available', sublabel: 'libres', color: _kAvailable),
         ],
@@ -272,7 +279,13 @@ class _ProfessionalCalendarScreenState
       BuildContext context, List<TimeOfDay> slots, ServiceState state) {
     return slots.map((time) {
       final occ = _isOccupied(time, _services, today);
-      final color = occ ? _kOccupied : _kAvailable;
+      final blocked = _isBlocked(time, _services, today);
+      final taken = occ || blocked;
+      final color = occ
+          ? _kOccupied
+          : blocked
+              ? _kBlocked
+              : _kAvailable;
 
       return Container(
         margin: const EdgeInsets.fromLTRB(16, 8, 16, 0),
@@ -289,7 +302,8 @@ class _ProfessionalCalendarScreenState
         child: ClipRRect(
           borderRadius: BorderRadius.circular(14),
           child: InkWell(
-            onTap: () => occ ? _onOccupied(time) : _onAvailable(context, time, state),
+            onTap: () =>
+                taken ? _onOccupied(time) : _onAvailable(context, time, state),
             child: IntrinsicHeight(
               child: Row(children: [
                 Container(width: 4, color: color),
@@ -318,7 +332,12 @@ class _ProfessionalCalendarScreenState
                           crossAxisAlignment: CrossAxisAlignment.start,
                           mainAxisAlignment: MainAxisAlignment.center,
                           children: [
-                            Text(occ ? 'Ocupado' : 'Disponible',
+                            Text(
+                                occ
+                                    ? 'Ocupado'
+                                    : blocked
+                                        ? 'Bloqueado'
+                                        : 'Disponible',
                                 style: TextStyle(
                                     fontSize: 14,
                                     fontWeight: FontWeight.w700,
@@ -326,7 +345,9 @@ class _ProfessionalCalendarScreenState
                             Text(
                               occ
                                   ? 'Toca para ver el servicio'
-                                  : 'Horario libre · toca para reservar',
+                                  : blocked
+                                      ? 'Toca para liberar el horario'
+                                      : 'Horario libre · toca para reservar',
                               style: TextStyle(
                                   fontSize: 11, color: context.subtle),
                             ),
@@ -342,7 +363,9 @@ class _ProfessionalCalendarScreenState
                         child: Icon(
                           occ
                               ? Icons.event_busy_outlined
-                              : Icons.event_available_outlined,
+                              : blocked
+                                  ? Icons.lock_outline
+                                  : Icons.event_available_outlined,
                           size: 17,
                           color: color),
                       ),
@@ -358,21 +381,17 @@ class _ProfessionalCalendarScreenState
   }
 
   void _onOccupied(TimeOfDay time) {
-    if (_services == null) return;
-    for (final event in _services!) {
-      if (today.toString() == event.day && time == event.range1Hour1) {
-        if (event.userId == event.professionalId) {
-          _confirmUnblock(event.id!, time);
-        } else {
-          Navigator.push(
-            context,
-            CupertinoPageRoute(
-                builder: (_) =>
-                    ProfessionalServiceScreen(serviceId: event.id!)),
-          );
-        }
-        return;
-      }
+    final event = _serviceAt(time, _services, today);
+    if (event?.id == null) return;
+
+    if (event!.status == ServiceStatus.selfBooked) {
+      _confirmUnblock(event.id!, time);
+    } else {
+      Navigator.push(
+        context,
+        CupertinoPageRoute(
+            builder: (_) => ProfessionalServiceScreen(serviceId: event.id!)),
+      );
     }
   }
 
@@ -568,13 +587,36 @@ class _ProfessionalCalendarScreenState
     ];
   }
 
-  bool _isOccupied(
+  /// The still-live service sitting on [time], if any.
+  ///
+  /// Cancelled and denied services are ignored on purpose: unblocking a slot
+  /// cancels its service, so counting those would leave the slot looking
+  /// occupied forever and make "desbloquear" appear to do nothing.
+  ServiceEntity? _serviceAt(
       TimeOfDay time, List<ServiceEntity>? services, DateTime day) {
-    if (services == null) return false;
-    return services
-        .any((s) => day.toString() == s.day && s.range1Hour1 == time);
+    if (services == null) return null;
+    for (final s in services) {
+      if (day.toString() != s.day || s.range1Hour1 != time) continue;
+      if (s.status == ServiceStatus.cancelled ||
+          s.status == ServiceStatus.denied) {
+        continue;
+      }
+      return s;
+    }
+    return null;
   }
 
+  /// Booked by a client — tapping it opens the service detail.
+  bool _isOccupied(
+          TimeOfDay time, List<ServiceEntity>? services, DateTime day) =>
+      _serviceAt(time, services, day)?.status != null &&
+      _serviceAt(time, services, day)!.status != ServiceStatus.selfBooked;
+
+  /// Reserved by the professional themselves — tapping it offers to release it.
+  bool _isBlocked(
+          TimeOfDay time, List<ServiceEntity>? services, DateTime day) =>
+      _serviceAt(time, services, day)?.status == ServiceStatus.selfBooked;
+
   String _capitalize(String s) =>
       s.isEmpty ? s : s[0].toUpperCase() + s.substring(1);
 }