Refactor ActivityCard UI and improve voting functionality

- Updated ActivityCard layout for better visual consistency and responsiveness.
- Simplified the category badge and adjusted styles for better readability.
- Enhanced the voting section with a progress bar and improved button designs.
- Added a new method in Activity model to check if all trip participants approved an activity.
- Improved error handling and validation in ActivityRepository for voting and fetching activities.
- Implemented pagination in ActivityPlacesService for activity searches.
- Removed outdated scripts for cleaning up duplicate images.

lib/components/activities/add_activity_bottom_sheet.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'dart:math' as math;
 import '../../blocs/activity/activity_bloc.dart';
 import '../../blocs/activity/activity_event.dart';
 import '../../models/activity.dart';
@@ -41,10 +42,17 @@ class _AddActivityBottomSheetState extends State<AddActivityBottomSheet> {
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
     final mediaQuery = MediaQuery.of(context);
+    final keyboardHeight = mediaQuery.viewInsets.bottom;
     
-    return Container(
+    return AnimatedContainer(
+      duration: const Duration(milliseconds: 200),
       height: mediaQuery.size.height * 0.85,
-      margin: const EdgeInsets.all(16),
+      margin: EdgeInsets.only(
+        left: 16,
+        right: 16,
+        top: 16,
+        bottom: 16,
+      ),
       decoration: BoxDecoration(
         color: theme.cardColor,
         borderRadius: BorderRadius.circular(20),
@@ -84,10 +92,15 @@ class _AddActivityBottomSheetState extends State<AddActivityBottomSheet> {
 
           const Divider(),
 
-          // Formulaire
+          // Formulaire avec SingleChildScrollView pour le scroll automatique
           Expanded(
             child: SingleChildScrollView(
-              padding: const EdgeInsets.all(20),
+              padding: EdgeInsets.only(
+                left: 20,
+                right: 20,
+                top: 20,
+                bottom: math.max(20, keyboardHeight),
+              ),
               child: Form(
                 key: _formKey,
                 child: Column(