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/suggestion_bloc/suggestion_bloc.dart

@@ -0,0 +1,30 @@
+import 'dart:developer';
+
+import 'package:equatable/equatable.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:suggestion_repository/suggestion_repository.dart';
+
+part 'suggestion_event.dart';
+part 'suggestion_state.dart';
+
+class SuggestionBloc extends Bloc<SuggestionEvent, SuggestionState> {
+  final ApiSuggestionRepository _suggestionRepository;
+
+  SuggestionBloc({required ApiSuggestionRepository suggestionRepository})
+      : _suggestionRepository = suggestionRepository,
+        super(SuggestionInitial()) {
+    on<SubmitSuggestion>(_onSubmitSuggestion);
+  }
+
+  void _onSubmitSuggestion(
+      SubmitSuggestion event, Emitter<SuggestionState> emit) async {
+    emit(SuggestionLoading());
+    try {
+      await _suggestionRepository.createSuggestion(event.message);
+      emit(SuggestionSuccess());
+    } catch (e) {
+      log(e.toString());
+      emit(SuggestionFailure(message: e.toString()));
+    }
+  }
+}

lib/blocs/suggestion_bloc/suggestion_event.dart

@@ -0,0 +1,17 @@
+part of 'suggestion_bloc.dart';
+
+abstract class SuggestionEvent extends Equatable {
+  const SuggestionEvent();
+
+  @override
+  List<Object> get props => [];
+}
+
+class SubmitSuggestion extends SuggestionEvent {
+  final String message;
+
+  const SubmitSuggestion({required this.message});
+
+  @override
+  List<Object> get props => [message];
+}

lib/blocs/suggestion_bloc/suggestion_state.dart

@@ -0,0 +1,23 @@
+part of 'suggestion_bloc.dart';
+
+abstract class SuggestionState extends Equatable {
+  const SuggestionState();
+
+  @override
+  List<Object?> get props => [];
+}
+
+class SuggestionInitial extends SuggestionState {}
+
+class SuggestionLoading extends SuggestionState {}
+
+class SuggestionSuccess extends SuggestionState {}
+
+class SuggestionFailure extends SuggestionState {
+  final String? message;
+
+  const SuggestionFailure({this.message});
+
+  @override
+  List<Object?> get props => [message];
+}