fix: port 7 web features and repair the endless-loading screens

Root cause behind most "stuck loading" reports: the backend changed shape
(schedules became an array, location_preferences a string) while the mobile
parser still hard-cast to Map/int. The TypeError was swallowed by a silent
catch that returned null, and screens only handled the success state, so a
parse failure rendered as a permanent spinner. Same class of bug appeared
across service lists via non-null map lookups and a total absence of
request timeouts.

Ported from prosappweb:
- in-app suggestions (POST /suggestions)
- policies/terms from GET /settings/policies
- configurable appointment length (slot_duration_minutes)
- block/unblock calendar slots (POST /services/block)
- GPS city detection on the profile (Nominatim)
- server-side professional search with haversine distance
- retry cooldown after a rejected professional application

Reliability:
- parse schedules array (day_of_week 0=Mon) and string location_preferences
- read times as wall clock, so 08:00 stays 08:00 across timezones
- carry minutes into hours in TimeOfDay.add; a minute-based step used to
  loop forever and freeze the calendar (covered by test/time_slots_test.dart)
- semver update check instead of string equality, which blocked every build
  that did not exactly match the configured version
- request timeouts across all repositories
- surface HTTP >= 400 instead of reporting failed writes as success
- error states with retry instead of an indefinite shimmer

Includes pre-existing uncommitted work from the UI redesign.

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

lib/blocs/service_bloc/service_bloc.dart

@@ -25,6 +25,7 @@ class ServiceBloc extends Bloc<ServiceEvent, ServiceState> {
         _professionalRepository = professionRepository,
         super(CreateServiceInitial()) {
     on<CreateService>(_onCreateService);
+    on<BlockSlot>(_onBlockSlot);
     on<LoadService>(_onLoadService);
     on<UpdateServiceStatus>(_onUpdateServiceStatus);
     on<LoadServicesForUser>(_onLoadServicesForUser);
@@ -72,6 +73,17 @@ class ServiceBloc extends Bloc<ServiceEvent, ServiceState> {
     }
   }
 
+  void _onBlockSlot(BlockSlot event, Emitter<ServiceState> emit) async {
+    try {
+      emit(CreateServiceLoading());
+      final serviceId = await _serviceRepository.blockSlot(event.day, event.hour1);
+      emit(CreateServiceSuccess(serviceId));
+    } catch (e) {
+      log(e.toString());
+      emit(CreateServiceFailure());
+    }
+  }
+
   void _onLoadService(LoadService event, Emitter<ServiceState> emit) async {
     try {
       final serviceStream = _serviceRepository.getService(event.serviceId);
@@ -108,7 +120,11 @@ class ServiceBloc extends Bloc<ServiceEvent, ServiceState> {
 
         final professionsDir = {for (var e in professionsList) e.id: e};
 
-        final servicesInfo = services.map((e) {
+        final servicesInfo = services
+            .where((e) =>
+                usersDir.containsKey(e.professionalId) &&
+                professionsDir.containsKey(e.professionalId))
+            .map((e) {
           return ServiceInfoUI(
               service: e,
               user: usersDir[e.professionalId]!,
@@ -141,7 +157,9 @@ class ServiceBloc extends Bloc<ServiceEvent, ServiceState> {
 
         final usersDir = {for (var e in users) e.id: e};
 
-        final servicesInfo = services.map((e) {
+        final servicesInfo = services
+            .where((e) => usersDir.containsKey(e.userId))
+            .map((e) {
           return ServiceInfoUI(
             service: e,
             user: usersDir[e.userId]!,
@@ -180,7 +198,11 @@ class ServiceBloc extends Bloc<ServiceEvent, ServiceState> {
 
         final professionsDir = {for (var e in professionsList) e.id: e};
 
-        final servicesInfo = services.map((e) {
+        final servicesInfo = services
+            .where((e) =>
+                usersDir.containsKey(e.professionalId) &&
+                professionsDir.containsKey(e.professionalId))
+            .map((e) {
           return ServiceInfoUI(
               service: e,
               user: usersDir[e.professionalId]!,
@@ -213,7 +235,9 @@ class ServiceBloc extends Bloc<ServiceEvent, ServiceState> {
 
         final usersDir = {for (var e in users) e.id: e};
 
-        final servicesInfo = services.map((e) {
+        final servicesInfo = services
+            .where((e) => usersDir.containsKey(e.userId))
+            .map((e) {
           return ServiceInfoUI(
             service: e,
             user: usersDir[e.userId]!,
@@ -246,7 +270,9 @@ class ServiceBloc extends Bloc<ServiceEvent, ServiceState> {
 
         final usersDir = {for (var e in users) e.id: e};
 
-        final servicesInfo = services.map((e) {
+        final servicesInfo = services
+            .where((e) => usersDir.containsKey(e.userId))
+            .map((e) {
           return ServiceInfoUI(
             service: e,
             user: usersDir[e.userId]!,