feat: enhance global search and map experience

- Global Activity Search:
  - Allow searching activities globally (not just in destination).
  - Add distance warning for activities > 50km away.
- Create Trip UI:
  - Fix destination suggestion list overflow.
  - Prevent suggestion list from reappearing after selection.
- Map:
  - Add generic text search support (e.g., "Restaurants") on 'Enter'.
  - Display multiple results for generic searches.
  - Resize markers (User 60.0, Places 50.0).
  - Standardize place markers to red pin.

lib/components/home/create_trip_content.dart

@@ -135,7 +135,11 @@ class _CreateTripContentState extends State<CreateTripContent> {
     }
   }
 
+  bool _isProgrammaticUpdate = false;
+
   void _onLocationChanged() {
+    if (_isProgrammaticUpdate) return;
+
     final query = _locationController.text.trim();
 
     if (query.length < 2) {
@@ -215,15 +219,18 @@ class _CreateTripContentState extends State<CreateTripContent> {
 
     if (_placeSuggestions.isEmpty) return;
 
+    final overlay = Overlay.of(context);
+
+    // Calculer la largeur correcte en fonction du padding parent (16 margin + 24 padding = 40 de chaque côté)
+    final width = MediaQuery.of(context).size.width - 80;
+
     _suggestionsOverlay = OverlayEntry(
       builder: (context) => Positioned(
-        width:
-            MediaQuery.of(context).size.width -
-            32, // Largeur du champ avec padding
+        width: width,
         child: CompositedTransformFollower(
           link: _layerLink,
           showWhenUnlinked: false,
-          offset: const Offset(0, 60), // Position sous le champ
+          targetAnchor: Alignment.bottomLeft,
           child: Material(
             elevation: 4,
             borderRadius: BorderRadius.circular(8),
@@ -236,6 +243,7 @@ class _CreateTripContentState extends State<CreateTripContent> {
               ),
               child: ListView.builder(
                 shrinkWrap: true,
+                padding: EdgeInsets.zero,
                 itemCount: _placeSuggestions.length,
                 itemBuilder: (context, index) {
                   final suggestion = _placeSuggestions[index];
@@ -256,7 +264,7 @@ class _CreateTripContentState extends State<CreateTripContent> {
       ),
     );
 
-    Overlay.of(context).insert(_suggestionsOverlay!);
+    overlay.insert(_suggestionsOverlay!);
   }
 
   void _hideSuggestions() {
@@ -265,7 +273,10 @@ class _CreateTripContentState extends State<CreateTripContent> {
   }
 
   void _selectSuggestion(PlaceSuggestion suggestion) {
+    _isProgrammaticUpdate = true;
     _locationController.text = suggestion.description;
+    _isProgrammaticUpdate = false;
+
     _hideSuggestions();
     setState(() {
       _placeSuggestions = [];