Migrate fires_flutter to flutter_map v6.1.0 and complete major null-safety fixes

- Updated Android build files: gradle plugin 8.2.2, gradle 8.3, SDK 34, minSdk 21
- Ran dart fix --apply for 87 automatic null-safety fixes
- Migrated flutter_map v6 API breaking changes:
  - MapOptions: center → initialCenter, zoom → initialZoom
  - layers → children structure
  - TileLayerOptions/MarkerLayerOptions/PolylineLayerOptions → TileLayer/MarkerLayer/PolylineLayer
  - Removed plugin_api.dart imports
  - Converted old plugin system (ZoomMapPlugin, AttributionPlugin, etc.) to direct widgets
  - Updated onTap callback signature: (TapPosition) → (TapPosition, LatLng)
- Migrated all marker/polyline creation to v6 API
- Fixed FlatButton → TextButton deprecation
- Fixed stackTrace access with catch(e, stackTrace) pattern
- Removed deprecated flutter_google_places_autocomplete dependency
- Removed deprecated dependencies: latlong, connectivity, launch_review
- Updated all imports from latlong → latlong2
- Placeholder implementation for places autocomplete (feature temporarily disabled)

Remaining tasks (non-blocking for build):
- Complete null-safety fixes for _location variables in genericMap.dart
- Fix theme.dart MaterialTheme parameter issues
- Fix customStepper.dart null-safety issues
- Final build and testing

lib/activeFires.dart

@@ -3,8 +3,8 @@ import 'dart:async';
 import 'package:comunes_flutter/comunes_flutter.dart';
 import 'package:fires_flutter/models/yourLocation.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter_fab_dialer/flutter_fab_dialer.dart';
 import 'package:flutter_redux/flutter_redux.dart';
+import 'package:flutter_speed_dial/flutter_speed_dial.dart';
 import 'package:redux/redux.dart';
 
 import 'colors.dart';
@@ -29,13 +29,13 @@ class _ViewModel {
   final bool isLoading;
 
   _ViewModel(
-      {@required this.onAdd,
-      @required this.onDelete,
-      @required this.onToggleSubs,
-      @required this.onTap,
-      @required this.onRefresh,
-      @required this.yourLocations,
-      @required this.isLoading});
+      {required this.onAdd,
+      required this.onDelete,
+      required this.onToggleSubs,
+      required this.onTap,
+      required this.onRefresh,
+      required this.yourLocations,
+      required this.isLoading});
 
   @override
   bool operator ==(Object other) =>
@@ -59,25 +59,35 @@ class ActiveFiresPage extends StatefulWidget {
 class _ActiveFiresPageState extends State<ActiveFiresPage> {
   final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();
 
-  List<FabMiniMenuItem> _fabMiniMenuItemList(
+  List<SpeedDialChild> _fabMiniMenuItemList(
       BuildContext context, AddYourLocationFunction onAdd) {
     return [
-      new FabMiniMenuItem.withText(
-        new Icon(Icons.location_searching),
-        fires600,
-        8.0,
-        S.of(context).addYourCurrentPosition,
-        () {
+      SpeedDialChild(
+        child: const Icon(Icons.location_searching),
+        backgroundColor: fires600,
+        label: S.of(context).addYourCurrentPosition,
+        labelWidget: Container(
+          color: Colors.white,
+          child: Text(S.of(context).addYourCurrentPosition,
+              style: const TextStyle(color: Colors.black38)),
+        ),
+        onTap: () {
           onAddYourLocation(onAdd);
         },
-        S.of(context).addYourCurrentPosition,
-        Colors.black38,
-        Colors.white,
       ),
-      new FabMiniMenuItem.withText(new Icon(Icons.edit_location), fires600, 8.0,
-          S.of(context).addSomePlace, () {
-        onAddOtherLocation(onAdd);
-      }, S.of(context).addSomePlace, Colors.black38, Colors.white)
+      SpeedDialChild(
+        child: const Icon(Icons.edit_location),
+        backgroundColor: fires600,
+        label: S.of(context).addSomePlace,
+        labelWidget: Container(
+          color: Colors.white,
+          child: Text(S.of(context).addSomePlace,
+              style: const TextStyle(color: Colors.black38)),
+        ),
+        onTap: () {
+          onAddOtherLocation(onAdd);
+        },
+      )
     ];
   }
 
@@ -243,9 +253,12 @@ class _ActiveFiresPageState extends State<ActiveFiresPage> {
                               view.onRefresh(completer);
                               return completer.future;
                             }),
-                        // TODO: Evaluate: https://github.com/tiagojencmartins/unicornspeeddial
-                        new FabDialer(_fabMiniMenuItemList(context, view.onAdd),
-                            fires600, new Icon(Icons.add))
+                        SpeedDial(
+                          icon: Icons.add,
+                          activeIcon: Icons.close,
+                          backgroundColor: fires600,
+                          children: _fabMiniMenuItemList(context, view.onAdd),
+                        )
                       ])
                     : new Center(
                         child: new CenteredColumn(children: <Widget>[