fix(#173): layout bulle selon maquette (Du/Au + pilules larges)

Titre, dates en français sur deux lignes, actions coche/croix
en pilules pleine largeur côte à côte.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/lib/widgets/quotidien/cartes_feed.dart

@@ -340,30 +340,26 @@ class _BulleTile extends StatelessWidget {
     required this.onRefuse,
   });
 
-  String get _periode {
+  String _fmtLong(String? iso) {
-    final d = card.dateDebut;
-    final f = card.dateFin;
-    if (d == null && f == null) return '';
-    if (d != null && f != null && d == f) return _fmt(d);
-    return '${_fmt(d)} → ${_fmt(f)}';
-  }
-
-  String _fmt(String? iso) {
     if (iso == null || iso.isEmpty) return '…';
     final dt = DateTime.tryParse(iso);
     if (dt == null) return iso;
+    const mois = [
+      'janvier',
+      'février',
+      'mars',
+      'avril',
+      'mai',
+      'juin',
+      'juillet',
+      'août',
+      'septembre',
+      'octobre',
+      'novembre',
+      'décembre',
+    ];
     final jj = dt.day.toString().padLeft(2, '0');
-    final mm = dt.month.toString().padLeft(2, '0');
+    return '$jj ${mois[dt.month - 1]} ${dt.year}';
-    return '$jj/$mm/${dt.year}';
-  }
-
-  /// Pas de « À traiter / Traité » : seulement un indice utile (refus / attente créateur).
-  String? get _indice {
-    if (card.statut == CarteStatut.refusee) return 'Refusé';
-    if (card.statut == CarteStatut.ouverte && card.isCreator) {
-      return 'En attente de réponse';
-    }
-    return null;
   }
 
   /// Arrêt maladie : reste opaque tant que la période n’est pas finie.
@@ -374,53 +370,61 @@ class _BulleTile extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final indice = _indice;
+    final memeJour = card.dateDebut != null &&
+        card.dateFin != null &&
+        card.dateDebut == card.dateFin;
+
     return Opacity(
       opacity: _attenuee ? 0.55 : 1,
       child: Carte(
         assetPath: card.backgroundAsset,
-        constraints: const BoxConstraints(minHeight: 96),
+        constraints: const BoxConstraints(minHeight: 120),
-        padding: const EdgeInsets.fromLTRB(20, 14, 20, 14),
+        padding: const EdgeInsets.fromLTRB(22, 16, 22, 16),
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.stretch,
           children: [
-            Row(
+            Text(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Expanded(
-                  child: Text(
               card.titreAffiche,
               maxLines: 1,
               overflow: TextOverflow.ellipsis,
               style: GoogleFonts.merienda(
-                      fontSize: 16,
+                fontSize: 18,
                 fontWeight: FontWeight.w700,
                 color: QuotidienTheme.ink,
               ),
             ),
-                ),
+            if (card.dateDebut != null || card.dateFin != null) ...[
-                if (indice != null)
+              const SizedBox(height: 10),
+              if (memeJour)
                 Text(
-                    indice,
+                  'Le ${_fmtLong(card.dateDebut)}',
                   style: GoogleFonts.merriweather(
-                      fontSize: 11,
+                    fontSize: 14,
-                      color: QuotidienTheme.muted,
+                    color: QuotidienTheme.ink,
+                    height: 1.35,
+                  ),
+                )
+              else ...[
+                Text(
+                  'Du ${_fmtLong(card.dateDebut)}',
+                  style: GoogleFonts.merriweather(
+                    fontSize: 14,
+                    color: QuotidienTheme.ink,
+                    height: 1.35,
+                  ),
+                ),
+                Text(
+                  'Au ${_fmtLong(card.dateFin)}',
+                  style: GoogleFonts.merriweather(
+                    fontSize: 14,
+                    color: QuotidienTheme.ink,
+                    height: 1.35,
                   ),
                 ),
               ],
-            ),
-            if (_periode.isNotEmpty) ...[
-              const SizedBox(height: 4),
-              Text(
-                _periode,
-                style: GoogleFonts.merriweather(
-                  fontSize: 13,
-                  color: QuotidienTheme.ink,
-                ),
-              ),
             ],
             if (card.motif != null && card.motif!.trim().isNotEmpty) ...[
-              const SizedBox(height: 2),
+              const SizedBox(height: 6),
               Text(
                 card.motif!,
                 maxLines: 2,
@@ -431,12 +435,13 @@ class _BulleTile extends StatelessWidget {
                 ),
               ),
             ],
-            if (card.statut == CarteStatut.refusee &&
+            if (card.statut == CarteStatut.refusee) ...[
-                card.lastRefuseComment != null &&
+              const SizedBox(height: 6),
-                card.lastRefuseComment!.trim().isNotEmpty) ...[
-              const SizedBox(height: 4),
               Text(
-                'Motif : ${card.lastRefuseComment}',
+                card.lastRefuseComment != null &&
+                        card.lastRefuseComment!.trim().isNotEmpty
+                    ? 'Refusé — ${card.lastRefuseComment}'
+                    : 'Refusé',
                 maxLines: 2,
                 overflow: TextOverflow.ellipsis,
                 style: GoogleFonts.merriweather(
@@ -445,39 +450,50 @@ class _BulleTile extends StatelessWidget {
                   color: QuotidienTheme.ink,
                 ),
               ),
+            ] else if (card.statut == CarteStatut.ouverte &&
+                card.isCreator) ...[
+              const SizedBox(height: 6),
+              Text(
+                'En attente de réponse',
+                style: GoogleFonts.merriweather(
+                  fontSize: 12,
+                  color: QuotidienTheme.muted,
+                ),
+              ),
             ],
             if (card.peutRepondre) ...[
-              const SizedBox(height: 10),
+              const SizedBox(height: 14),
               if (busy)
-                const Align(
+                const Center(
-                  alignment: Alignment.centerRight,
                   child: SizedBox(
-                    width: 18,
+                    width: 22,
-                    height: 18,
+                    height: 22,
                     child: CircularProgressIndicator(strokeWidth: 2),
                   ),
                 )
-              else
+              else if (card.responseMode == CarteResponseMode.acceptRefuse)
                 Row(
-                  mainAxisAlignment: MainAxisAlignment.end,
                   children: [
-                    if (card.responseMode ==
+                    Expanded(
-                        CarteResponseMode.acceptRefuse) ...[
+                      child: _ActionPill(
-                      _ActionPill(
                         asset: QuotidienTheme.pillTurquoiseAsset,
                         iconAsset: 'assets/images/coche.png',
                         tooltip: 'Accepter',
                         onTap: onAccept,
                       ),
-                      const SizedBox(width: 10),
+                    ),
-                      _ActionPill(
+                    const SizedBox(width: 12),
+                    Expanded(
+                      child: _ActionPill(
                         asset: QuotidienTheme.pillCorailAsset,
                         iconAsset: 'assets/images/red_cross2.png',
                         tooltip: 'Refuser',
                         onTap: onRefuse,
                       ),
+                    ),
                   ],
-                    if (card.responseMode == CarteResponseMode.ack)
+                )
+              else if (card.responseMode == CarteResponseMode.ack)
                 _ActionPill(
                   asset: QuotidienTheme.pillTurquoiseAsset,
                   iconAsset: 'assets/images/coche.png',
@@ -485,8 +501,6 @@ class _BulleTile extends StatelessWidget {
                   onTap: onAck,
                 ),
             ],
-                ),
-            ],
           ],
         ),
       ),
@@ -494,7 +508,7 @@ class _BulleTile extends StatelessWidget {
   }
 }
 
-/// Bouton pilule dessiné (fond pastel + coche / croix).
+/// Bouton pilule dessiné pleine largeur (fond pastel + coche / croix).
 class _ActionPill extends StatelessWidget {
   final String asset;
   final String iconAsset;
@@ -514,10 +528,9 @@ class _ActionPill extends StatelessWidget {
       message: tooltip,
       child: InkWell(
         onTap: onTap,
-        borderRadius: BorderRadius.circular(20),
+        borderRadius: BorderRadius.circular(24),
         child: SizedBox(
-          width: 52,
+          height: 40,
-          height: 32,
           child: Stack(
             alignment: Alignment.center,
             children: [
@@ -526,8 +539,8 @@ class _ActionPill extends StatelessWidget {
               ),
               Image.asset(
                 iconAsset,
-                height: 18,
+                height: 22,
-                width: 18,
+                width: 22,
                 fit: BoxFit.contain,
               ),
             ],