diff --git a/client/src/App.tsx b/client/src/App.tsx
index 1f85b3c..8a25c61 100644
--- a/client/src/App.tsx
+++ b/client/src/App.tsx
@@ -12,6 +12,7 @@ import AAPDashboard from "./pages/AAPDashboard";
 import Settings from "./pages/Settings";
 import UsersAdmin from "./pages/UsersAdmin";
 import ImportLogs from "./pages/ImportLogs";
+import BoiteAIdees from "./pages/BoiteAIdees";
 import { Loader2 } from "lucide-react";
 
 // ─── Guard d'authentification ─────────────────────────────────────────────────
@@ -97,6 +98,16 @@ function LogsPage() {
   );
 }
 
+function BoiteAIdeesPage() {
+  return (
+    <AuthGuard>
+      <DashboardWrapper>
+        <BoiteAIdees />
+      </DashboardWrapper>
+    </AuthGuard>
+  );
+}
+
 // ─── Routeur principal ────────────────────────────────────────────────────────
 
 function Router() {
@@ -111,6 +122,7 @@ function Router() {
       <Route path="/admin/settings" component={SettingsPage} />
       <Route path="/admin/users" component={UsersPage} />
       <Route path="/admin/logs" component={LogsPage} />
+      <Route path="/boite-a-idees" component={BoiteAIdeesPage} />
       <Route path="/404" component={NotFound} />
       <Route component={NotFound} />
     </Switch>
diff --git a/client/src/components/AppLayout.tsx b/client/src/components/AppLayout.tsx
index a9ecd56..b40fa44 100644
--- a/client/src/components/AppLayout.tsx
+++ b/client/src/components/AppLayout.tsx
@@ -16,6 +16,7 @@ import {
   RefreshCw,
   Menu,
   X,
+  Lightbulb,
 } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { Badge } from "@/components/ui/badge";
@@ -48,6 +49,14 @@ const NAV_GROUPS: NavGroup[] = [
       { label: "Appels à Projets", href: "/aap", icon: <Target size={16} /> },
     ],
   },
+  {
+    label: "Boîte à idées",
+    icon: <Lightbulb size={18} />,
+    defaultOpen: true,
+    items: [
+      { label: "Boîte à idées", href: "/boite-a-idees", icon: <Lightbulb size={16} /> },
+    ],
+  },
   {
     label: "Administration",
     icon: <Settings size={18} />,
@@ -71,6 +80,7 @@ export function AppLayout({ children, user, onLogout }: AppLayoutProps) {
   const [mobileOpen, setMobileOpen] = useState(false);
   const [openGroups, setOpenGroups] = useState<Record<string, boolean>>({
     "Tableaux de bord": true,
+    "Boîte à idées": true,
     "Administration": false,
   });
   const [location] = useLocation();
diff --git a/client/src/pages/BoiteAIdees.tsx b/client/src/pages/BoiteAIdees.tsx
new file mode 100644
index 0000000..2f1e1be
--- /dev/null
+++ b/client/src/pages/BoiteAIdees.tsx
@@ -0,0 +1,465 @@
+import { useState } from "react";
+import { trpc } from "@/lib/trpc";
+import { useAuth } from "@/_core/hooks/useAuth";
+import { Button } from "@/components/ui/button";
+import { Badge } from "@/components/ui/badge";
+import { Input } from "@/components/ui/input";
+import { Textarea } from "@/components/ui/textarea";
+import { Label } from "@/components/ui/label";
+import {
+  Dialog,
+  DialogContent,
+  DialogHeader,
+  DialogTitle,
+  DialogFooter,
+} from "@/components/ui/dialog";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
+import { toast } from "sonner";
+import {
+  Lightbulb,
+  Plus,
+  MessageSquare,
+  Calendar,
+  User,
+  ChevronDown,
+  ChevronUp,
+  Send,
+  Clock,
+  CheckCircle2,
+  XCircle,
+  AlertCircle,
+} from "lucide-react";
+import { format } from "date-fns";
+import { fr } from "date-fns/locale";
+
+type Statut = "ouvert" | "en_cours" | "resolu" | "ferme";
+
+const STATUT_CONFIG: Record<Statut, { label: string; color: string; icon: React.ReactNode }> = {
+  ouvert: {
+    label: "Ouvert",
+    color: "bg-blue-100 text-blue-700 border-blue-200",
+    icon: <AlertCircle className="h-3 w-3" />,
+  },
+  en_cours: {
+    label: "En cours",
+    color: "bg-amber-100 text-amber-700 border-amber-200",
+    icon: <Clock className="h-3 w-3" />,
+  },
+  resolu: {
+    label: "Résolu",
+    color: "bg-emerald-100 text-emerald-700 border-emerald-200",
+    icon: <CheckCircle2 className="h-3 w-3" />,
+  },
+  ferme: {
+    label: "Fermé",
+    color: "bg-slate-100 text-slate-600 border-slate-200",
+    icon: <XCircle className="h-3 w-3" />,
+  },
+};
+
+type Idea = {
+  id: number;
+  userId: number;
+  userName: string;
+  titre: string;
+  message: string;
+  statut: Statut;
+  reponseAdmin: string | null;
+  reponduPar: string | null;
+  reponduAt: Date | null;
+  createdAt: Date;
+  updatedAt: Date;
+};
+
+export default function BoiteAIdees() {
+  const { user } = useAuth();
+  const isAdmin = user?.role === "admin";
+
+  const { data: ideas = [], refetch } = trpc.ideas.list.useQuery();
+  const createMutation = trpc.ideas.create.useMutation({
+    onSuccess: () => {
+      toast.success("Votre demande a été envoyée avec succès !");
+      setNewDialogOpen(false);
+      setNewTitre("");
+      setNewMessage("");
+      refetch();
+    },
+    onError: (e) => toast.error(e.message),
+  });
+  const reponseMutation = trpc.ideas.repondre.useMutation({
+    onSuccess: () => {
+      toast.success("Réponse enregistrée !");
+      setReponseDialogOpen(false);
+      setReponseText("");
+      setSelectedIdea(null);
+      refetch();
+    },
+    onError: (e) => toast.error(e.message),
+  });
+
+  // État nouvelle demande
+  const [newDialogOpen, setNewDialogOpen] = useState(false);
+  const [newTitre, setNewTitre] = useState("");
+  const [newMessage, setNewMessage] = useState("");
+
+  // État réponse admin
+  const [reponseDialogOpen, setReponseDialogOpen] = useState(false);
+  const [selectedIdea, setSelectedIdea] = useState<Idea | null>(null);
+  const [reponseText, setReponseText] = useState("");
+  const [reponseStatut, setReponseStatut] = useState<Statut>("resolu");
+
+  // État expansion des cartes
+  const [expandedIds, setExpandedIds] = useState<Set<number>>(new Set());
+
+  // Filtre statut
+  const [filtreStatut, setFiltreStatut] = useState<string>("tous");
+  const [filtreRecherche, setFiltreRecherche] = useState("");
+
+  const toggleExpand = (id: number) => {
+    setExpandedIds((prev) => {
+      const next = new Set(prev);
+      if (next.has(id)) next.delete(id);
+      else next.add(id);
+      return next;
+    });
+  };
+
+  const handleRepondre = (idea: Idea) => {
+    setSelectedIdea(idea);
+    setReponseText(idea.reponseAdmin ?? "");
+    setReponseStatut(idea.statut === "ouvert" ? "en_cours" : idea.statut);
+    setReponseDialogOpen(true);
+  };
+
+  const filteredIdeas = (ideas as Idea[]).filter((idea) => {
+    const matchStatut = filtreStatut === "tous" || idea.statut === filtreStatut;
+    const matchRecherche =
+      !filtreRecherche ||
+      idea.titre.toLowerCase().includes(filtreRecherche.toLowerCase()) ||
+      idea.message.toLowerCase().includes(filtreRecherche.toLowerCase()) ||
+      idea.userName.toLowerCase().includes(filtreRecherche.toLowerCase());
+    return matchStatut && matchRecherche;
+  });
+
+  const counts = {
+    tous: (ideas as Idea[]).length,
+    ouvert: (ideas as Idea[]).filter((i) => i.statut === "ouvert").length,
+    en_cours: (ideas as Idea[]).filter((i) => i.statut === "en_cours").length,
+    resolu: (ideas as Idea[]).filter((i) => i.statut === "resolu").length,
+    ferme: (ideas as Idea[]).filter((i) => i.statut === "ferme").length,
+  };
+
+  return (
+    <div className="p-6 max-w-5xl mx-auto">
+      {/* En-tête */}
+      <div className="flex items-center justify-between mb-6">
+        <div className="flex items-center gap-3">
+          <div className="p-2 bg-amber-100 rounded-xl">
+            <Lightbulb className="h-6 w-6 text-amber-600" />
+          </div>
+          <div>
+            <h1 className="text-2xl font-bold text-slate-800">Boîte à idées</h1>
+            <p className="text-sm text-slate-500">
+              {isAdmin
+                ? "Gérez les questions et suggestions des utilisateurs"
+                : "Posez vos questions et partagez vos suggestions"}
+            </p>
+          </div>
+        </div>
+        <Button
+          onClick={() => setNewDialogOpen(true)}
+          className="bg-[#0a2463] hover:bg-[#0a2463]/90 text-white gap-2 shadow-md"
+        >
+          <Plus className="h-4 w-4" />
+          Nouvelle demande
+        </Button>
+      </div>
+
+      {/* Filtres */}
+      <div className="flex flex-wrap gap-3 mb-6">
+        <div className="flex-1 min-w-[200px]">
+          <Input
+            placeholder="Rechercher par titre, message ou demandeur..."
+            value={filtreRecherche}
+            onChange={(e) => setFiltreRecherche(e.target.value)}
+            className="bg-white border-slate-200"
+          />
+        </div>
+        <div className="flex gap-2 flex-wrap">
+          {(["tous", "ouvert", "en_cours", "resolu", "ferme"] as const).map((s) => (
+            <button
+              key={s}
+              onClick={() => setFiltreStatut(s)}
+              className={`px-3 py-1.5 rounded-full text-xs font-medium border transition-all ${
+                filtreStatut === s
+                  ? "bg-[#0a2463] text-white border-[#0a2463]"
+                  : "bg-white text-slate-600 border-slate-200 hover:border-[#0a2463]/40"
+              }`}
+            >
+              {s === "tous" ? "Tous" : STATUT_CONFIG[s].label}{" "}
+              <span className="opacity-70">({counts[s]})</span>
+            </button>
+          ))}
+        </div>
+      </div>
+
+      {/* Liste des demandes */}
+      {filteredIdeas.length === 0 ? (
+        <div className="text-center py-16 text-slate-400">
+          <MessageSquare className="h-12 w-12 mx-auto mb-3 opacity-30" />
+          <p className="text-lg font-medium">Aucune demande pour le moment</p>
+          <p className="text-sm mt-1">Soyez le premier à soumettre une question ou une suggestion.</p>
+        </div>
+      ) : (
+        <div className="space-y-3">
+          {filteredIdeas.map((idea) => {
+            const isExpanded = expandedIds.has(idea.id);
+            const cfg = STATUT_CONFIG[idea.statut];
+            return (
+              <div
+                key={idea.id}
+                className="bg-white rounded-xl border border-slate-100 shadow-sm hover:shadow-md transition-shadow overflow-hidden"
+              >
+                {/* En-tête de la carte */}
+                <div
+                  className="flex items-start gap-4 p-4 cursor-pointer"
+                  onClick={() => toggleExpand(idea.id)}
+                >
+                  <div className="flex-1 min-w-0">
+                    <div className="flex items-center gap-2 flex-wrap mb-1">
+                      <span
+                        className={`inline-flex items-center gap-1 px-2 py-0.5 rounded-full text-xs font-medium border ${cfg.color}`}
+                      >
+                        {cfg.icon}
+                        {cfg.label}
+                      </span>
+                      <h3 className="font-semibold text-slate-800 text-sm truncate">
+                        {idea.titre}
+                      </h3>
+                    </div>
+                    <div className="flex items-center gap-4 text-xs text-slate-400 mt-1">
+                      <span className="flex items-center gap-1">
+                        <User className="h-3 w-3" />
+                        {idea.userName}
+                      </span>
+                      <span className="flex items-center gap-1">
+                        <Calendar className="h-3 w-3" />
+                        {format(new Date(idea.createdAt), "d MMM yyyy à HH:mm", { locale: fr })}
+                      </span>
+                      {idea.reponseAdmin && (
+                        <span className="flex items-center gap-1 text-emerald-600">
+                          <MessageSquare className="h-3 w-3" />
+                          Réponse disponible
+                        </span>
+                      )}
+                    </div>
+                  </div>
+                  <div className="flex items-center gap-2 shrink-0">
+                    {isAdmin && (
+                      <Button
+                        size="sm"
+                        variant="outline"
+                        className="text-xs h-7 px-2 border-[#0a2463]/30 text-[#0a2463] hover:bg-[#0a2463]/5"
+                        onClick={(e) => {
+                          e.stopPropagation();
+                          handleRepondre(idea);
+                        }}
+                      >
+                        <Send className="h-3 w-3 mr-1" />
+                        Répondre
+                      </Button>
+                    )}
+                    {isExpanded ? (
+                      <ChevronUp className="h-4 w-4 text-slate-400" />
+                    ) : (
+                      <ChevronDown className="h-4 w-4 text-slate-400" />
+                    )}
+                  </div>
+                </div>
+
+                {/* Contenu développé */}
+                {isExpanded && (
+                  <div className="border-t border-slate-100 px-4 pb-4 pt-3 space-y-3">
+                    {/* Message */}
+                    <div className="bg-slate-50 rounded-lg p-3">
+                      <p className="text-xs font-medium text-slate-500 mb-1.5 uppercase tracking-wide">
+                        Message
+                      </p>
+                      <p className="text-sm text-slate-700 whitespace-pre-wrap">{idea.message}</p>
+                    </div>
+
+                    {/* Réponse admin */}
+                    {idea.reponseAdmin && (
+                      <div className="bg-emerald-50 rounded-lg p-3 border border-emerald-100">
+                        <p className="text-xs font-medium text-emerald-600 mb-1.5 uppercase tracking-wide flex items-center gap-1">
+                          <MessageSquare className="h-3 w-3" />
+                          Réponse de l'équipe
+                          {idea.reponduPar && (
+                            <span className="text-emerald-500 normal-case ml-1">
+                              — {idea.reponduPar}
+                            </span>
+                          )}
+                          {idea.reponduAt && (
+                            <span className="text-emerald-400 normal-case ml-1">
+                              ({format(new Date(idea.reponduAt), "d MMM yyyy", { locale: fr })})
+                            </span>
+                          )}
+                        </p>
+                        <p className="text-sm text-emerald-800 whitespace-pre-wrap">
+                          {idea.reponseAdmin}
+                        </p>
+                      </div>
+                    )}
+                  </div>
+                )}
+              </div>
+            );
+          })}
+        </div>
+      )}
+
+      {/* Dialog : Nouvelle demande */}
+      <Dialog open={newDialogOpen} onOpenChange={setNewDialogOpen}>
+        <DialogContent className="max-w-lg">
+          <DialogHeader>
+            <DialogTitle className="flex items-center gap-2">
+              <Lightbulb className="h-5 w-5 text-amber-500" />
+              Nouvelle demande
+            </DialogTitle>
+          </DialogHeader>
+          <div className="space-y-4 py-2">
+            <div>
+              <Label htmlFor="titre" className="text-sm font-medium">
+                Titre <span className="text-red-500">*</span>
+              </Label>
+              <Input
+                id="titre"
+                placeholder="Résumez votre demande en quelques mots..."
+                value={newTitre}
+                onChange={(e) => setNewTitre(e.target.value)}
+                className="mt-1"
+              />
+            </div>
+            <div>
+              <Label htmlFor="message" className="text-sm font-medium">
+                Message <span className="text-red-500">*</span>
+              </Label>
+              <Textarea
+                id="message"
+                placeholder="Décrivez votre question, suggestion ou remarque en détail..."
+                value={newMessage}
+                onChange={(e) => setNewMessage(e.target.value)}
+                rows={5}
+                className="mt-1 resize-none"
+              />
+            </div>
+          </div>
+          <DialogFooter>
+            <Button variant="outline" onClick={() => setNewDialogOpen(false)}>
+              Annuler
+            </Button>
+            <Button
+              onClick={() => {
+                if (!newTitre.trim() || !newMessage.trim()) {
+                  toast.error("Veuillez remplir tous les champs");
+                  return;
+                }
+                createMutation.mutate({ titre: newTitre.trim(), message: newMessage.trim() });
+              }}
+              disabled={createMutation.isPending}
+              className="bg-[#0a2463] hover:bg-[#0a2463]/90 text-white gap-2"
+            >
+              <Send className="h-4 w-4" />
+              {createMutation.isPending ? "Envoi..." : "Envoyer"}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+
+      {/* Dialog : Réponse admin */}
+      <Dialog open={reponseDialogOpen} onOpenChange={setReponseDialogOpen}>
+        <DialogContent className="max-w-lg">
+          <DialogHeader>
+            <DialogTitle className="flex items-center gap-2">
+              <MessageSquare className="h-5 w-5 text-[#0a2463]" />
+              Répondre à la demande
+            </DialogTitle>
+          </DialogHeader>
+          {selectedIdea && (
+            <div className="space-y-4 py-2">
+              {/* Rappel de la demande */}
+              <div className="bg-slate-50 rounded-lg p-3">
+                <p className="text-xs font-medium text-slate-500 mb-1">Demande de {selectedIdea.userName}</p>
+                <p className="text-sm font-semibold text-slate-800">{selectedIdea.titre}</p>
+                <p className="text-xs text-slate-600 mt-1 line-clamp-2">{selectedIdea.message}</p>
+              </div>
+
+              {/* Statut */}
+              <div>
+                <Label className="text-sm font-medium">Statut</Label>
+                <Select
+                  value={reponseStatut}
+                  onValueChange={(v) => setReponseStatut(v as Statut)}
+                >
+                  <SelectTrigger className="mt-1">
+                    <SelectValue />
+                  </SelectTrigger>
+                  <SelectContent>
+                    <SelectItem value="ouvert">Ouvert</SelectItem>
+                    <SelectItem value="en_cours">En cours</SelectItem>
+                    <SelectItem value="resolu">Résolu</SelectItem>
+                    <SelectItem value="ferme">Fermé</SelectItem>
+                  </SelectContent>
+                </Select>
+              </div>
+
+              {/* Réponse */}
+              <div>
+                <Label htmlFor="reponse" className="text-sm font-medium">
+                  Réponse <span className="text-red-500">*</span>
+                </Label>
+                <Textarea
+                  id="reponse"
+                  placeholder="Rédigez votre réponse..."
+                  value={reponseText}
+                  onChange={(e) => setReponseText(e.target.value)}
+                  rows={5}
+                  className="mt-1 resize-none"
+                />
+              </div>
+            </div>
+          )}
+          <DialogFooter>
+            <Button variant="outline" onClick={() => setReponseDialogOpen(false)}>
+              Annuler
+            </Button>
+            <Button
+              onClick={() => {
+                if (!reponseText.trim()) {
+                  toast.error("Veuillez rédiger une réponse");
+                  return;
+                }
+                reponseMutation.mutate({
+                  id: selectedIdea!.id,
+                  reponseAdmin: reponseText.trim(),
+                  statut: reponseStatut,
+                });
+              }}
+              disabled={reponseMutation.isPending}
+              className="bg-[#0a2463] hover:bg-[#0a2463]/90 text-white gap-2"
+            >
+              <Send className="h-4 w-4" />
+              {reponseMutation.isPending ? "Envoi..." : "Enregistrer la réponse"}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+    </div>
+  );
+}
diff --git a/client/src/pages/UsersAdmin.tsx b/client/src/pages/UsersAdmin.tsx
index 9aece9f..3f94cf7 100644
--- a/client/src/pages/UsersAdmin.tsx
+++ b/client/src/pages/UsersAdmin.tsx
@@ -4,7 +4,7 @@ import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { Badge } from "@/components/ui/badge";
-import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Card, CardContent } from "@/components/ui/card";
 import {
   Dialog,
   DialogContent,
@@ -26,6 +26,7 @@ import {
   Eye,
   CheckCircle,
   XCircle,
+  AtSign,
 } from "lucide-react";
 import { toast } from "sonner";
 import { format } from "date-fns";
@@ -37,7 +38,8 @@ type Role = "admin" | "user" | "readonly";
 interface LocalUser {
   id: number;
   name: string;
-  email: string;
+  username: string | null;
+  email: string | null;
   role: Role;
   isActive: boolean;
   createdAt: Date;
@@ -64,13 +66,21 @@ const ROLE_ICONS: Record<Role, React.ReactNode> = {
 
 interface UserFormData {
   name: string;
+  username: string;
   email: string;
   password: string;
   role: Role;
   isActive: boolean;
 }
 
-const DEFAULT_FORM: UserFormData = { name: "", email: "", password: "", role: "user", isActive: true };
+const DEFAULT_FORM: UserFormData = {
+  name: "",
+  username: "",
+  email: "",
+  password: "",
+  role: "user",
+  isActive: true,
+};
 
 export default function UsersAdmin() {
   const [showDialog, setShowDialog] = useState(false);
@@ -118,7 +128,14 @@ export default function UsersAdmin() {
 
   const openEdit = (user: LocalUser) => {
     setEditingUser(user);
-    setForm({ name: user.name, email: user.email, password: "", role: user.role, isActive: user.isActive });
+    setForm({
+      name: user.name,
+      username: user.username ?? "",
+      email: user.email ?? "",
+      password: "",
+      role: user.role,
+      isActive: user.isActive,
+    });
     setShowDialog(true);
   };
 
@@ -127,14 +144,21 @@ export default function UsersAdmin() {
       const data: Parameters<typeof updateMutation.mutate>[0] = {
         id: editingUser.id,
         name: form.name,
-        email: form.email,
+        username: form.username || undefined,
+        email: form.email || undefined,
         role: form.role,
         isActive: form.isActive,
       };
       if (form.password) data.password = form.password;
       updateMutation.mutate(data);
     } else {
-      createMutation.mutate({ name: form.name, email: form.email, password: form.password, role: form.role });
+      createMutation.mutate({
+        name: form.name,
+        username: form.username || undefined,
+        email: form.email || undefined,
+        password: form.password,
+        role: form.role,
+      });
     }
   };
 
@@ -149,7 +173,9 @@ export default function UsersAdmin() {
             <Users size={22} className="text-primary" />
             <h1 className="text-2xl font-bold text-foreground">Gestion des utilisateurs</h1>
           </div>
-          <p className="text-muted-foreground text-sm">{users.length} utilisateur{users.length !== 1 ? "s" : ""} enregistré{users.length !== 1 ? "s" : ""}</p>
+          <p className="text-muted-foreground text-sm">
+            {users.length} utilisateur{users.length !== 1 ? "s" : ""} enregistré{users.length !== 1 ? "s" : ""}
+          </p>
         </div>
         <Button onClick={openCreate} className="gap-2">
           <Plus size={15} />
@@ -175,7 +201,7 @@ export default function UsersAdmin() {
                 <thead>
                   <tr className="border-b border-border bg-muted/30">
                     <th className="text-left px-4 py-3 font-semibold text-muted-foreground">Nom</th>
-                    <th className="text-left px-4 py-3 font-semibold text-muted-foreground">Email</th>
+                    <th className="text-left px-4 py-3 font-semibold text-muted-foreground">Identifiant / Email</th>
                     <th className="text-left px-4 py-3 font-semibold text-muted-foreground w-36">Rôle</th>
                     <th className="text-left px-4 py-3 font-semibold text-muted-foreground w-24">Statut</th>
                     <th className="text-left px-4 py-3 font-semibold text-muted-foreground w-32">Dernière connexion</th>
@@ -193,7 +219,25 @@ export default function UsersAdmin() {
                           <span className="font-medium text-foreground">{user.name}</span>
                         </div>
                       </td>
-                      <td className="px-4 py-3 text-muted-foreground">{user.email}</td>
+                      <td className="px-4 py-3">
+                        <div className="flex flex-col gap-0.5">
+                          {user.username && (
+                            <span className="inline-flex items-center gap-1 text-xs font-mono bg-violet-50 text-violet-700 border border-violet-200 rounded px-1.5 py-0.5 w-fit">
+                              <User size={10} />
+                              {user.username}
+                            </span>
+                          )}
+                          {user.email && (
+                            <span className="inline-flex items-center gap-1 text-xs text-muted-foreground">
+                              <AtSign size={10} />
+                              {user.email}
+                            </span>
+                          )}
+                          {!user.username && !user.email && (
+                            <span className="text-xs text-muted-foreground italic">—</span>
+                          )}
+                        </div>
+                      </td>
                       <td className="px-4 py-3">
                         <Badge variant="outline" className={cn("text-xs gap-1", ROLE_COLORS[user.role])}>
                           {ROLE_ICONS[user.role]}
@@ -218,10 +262,20 @@ export default function UsersAdmin() {
                       </td>
                       <td className="px-4 py-3">
                         <div className="flex items-center gap-1">
-                          <Button variant="ghost" size="icon" className="w-7 h-7 text-muted-foreground hover:text-foreground" onClick={() => openEdit(user)}>
+                          <Button
+                            variant="ghost"
+                            size="icon"
+                            className="w-7 h-7 text-muted-foreground hover:text-foreground"
+                            onClick={() => openEdit(user)}
+                          >
                             <Pencil size={13} />
                           </Button>
-                          <Button variant="ghost" size="icon" className="w-7 h-7 text-muted-foreground hover:text-destructive" onClick={() => setDeleteId(user.id)}>
+                          <Button
+                            variant="ghost"
+                            size="icon"
+                            className="w-7 h-7 text-muted-foreground hover:text-destructive"
+                            onClick={() => setDeleteId(user.id)}
+                          >
                             <Trash2 size={13} />
                           </Button>
                         </div>
@@ -241,23 +295,65 @@ export default function UsersAdmin() {
           <DialogHeader>
             <DialogTitle>{editingUser ? "Modifier l'utilisateur" : "Nouvel utilisateur"}</DialogTitle>
             <DialogDescription>
-              {editingUser ? "Modifiez les informations de l'utilisateur" : "Créez un nouveau compte utilisateur"}
+              {editingUser
+                ? "Modifiez les informations de l'utilisateur"
+                : "Créez un nouveau compte. L'identifiant ou l'e-mail servira à la connexion."}
             </DialogDescription>
           </DialogHeader>
           <div className="space-y-4 py-2">
             <div className="grid grid-cols-2 gap-4">
+              {/* Nom complet */}
               <div className="space-y-2 col-span-2">
-                <Label>Nom complet</Label>
-                <Input placeholder="Jean Dupont" value={form.name} onChange={(e) => setForm((f) => ({ ...f, name: e.target.value }))} />
+                <Label>Nom complet <span className="text-destructive">*</span></Label>
+                <Input
+                  placeholder="Jean Dupont"
+                  value={form.name}
+                  onChange={(e) => setForm((f) => ({ ...f, name: e.target.value }))}
+                />
               </div>
+              {/* Identifiant */}
               <div className="space-y-2 col-span-2">
-                <Label>Adresse e-mail</Label>
-                <Input type="email" placeholder="jean@itinova.fr" value={form.email} onChange={(e) => setForm((f) => ({ ...f, email: e.target.value }))} />
+                <Label>
+                  Identifiant (username)
+                  <span className="ml-1 text-xs text-muted-foreground">(optionnel)</span>
+                </Label>
+                <Input
+                  placeholder="jean.dupont"
+                  value={form.username}
+                  onChange={(e) => setForm((f) => ({ ...f, username: e.target.value }))}
+                />
+                <p className="text-xs text-muted-foreground">
+                  Permet la connexion sans e-mail. Ex : <code>adminItinova</code>
+                </p>
               </div>
+              {/* Email */}
               <div className="space-y-2 col-span-2">
-                <Label>{editingUser ? "Nouveau mot de passe (laisser vide pour ne pas changer)" : "Mot de passe"}</Label>
-                <Input type="password" placeholder="••••••••" value={form.password} onChange={(e) => setForm((f) => ({ ...f, password: e.target.value }))} />
+                <Label>
+                  Adresse e-mail
+                  <span className="ml-1 text-xs text-muted-foreground">(optionnel)</span>
+                </Label>
+                <Input
+                  type="email"
+                  placeholder="jean@itinova.fr"
+                  value={form.email}
+                  onChange={(e) => setForm((f) => ({ ...f, email: e.target.value }))}
+                />
               </div>
+              {/* Mot de passe */}
+              <div className="space-y-2 col-span-2">
+                <Label>
+                  {editingUser
+                    ? "Nouveau mot de passe (laisser vide pour ne pas changer)"
+                    : <>Mot de passe <span className="text-destructive">*</span></>}
+                </Label>
+                <Input
+                  type="password"
+                  placeholder="••••••••"
+                  value={form.password}
+                  onChange={(e) => setForm((f) => ({ ...f, password: e.target.value }))}
+                />
+              </div>
+              {/* Rôle */}
               <div className="space-y-2">
                 <Label>Rôle</Label>
                 <Select value={form.role} onValueChange={(v) => setForm((f) => ({ ...f, role: v as Role }))}>
@@ -271,11 +367,15 @@ export default function UsersAdmin() {
                   </SelectContent>
                 </Select>
               </div>
+              {/* Statut (modification uniquement) */}
               {editingUser && (
                 <div className="space-y-2">
                   <Label>Statut</Label>
                   <div className="flex items-center gap-2 pt-2">
-                    <Switch checked={form.isActive} onCheckedChange={(v) => setForm((f) => ({ ...f, isActive: v }))} />
+                    <Switch
+                      checked={form.isActive}
+                      onCheckedChange={(v) => setForm((f) => ({ ...f, isActive: v }))}
+                    />
                     <span className="text-sm">{form.isActive ? "Actif" : "Inactif"}</span>
                   </div>
                 </div>
@@ -283,9 +383,16 @@ export default function UsersAdmin() {
             </div>
           </div>
           <DialogFooter>
-            <Button variant="outline" onClick={() => setShowDialog(false)}>Annuler</Button>
-            <Button onClick={handleSubmit} disabled={createMutation.isPending || updateMutation.isPending}>
-              {(createMutation.isPending || updateMutation.isPending) && <Loader2 size={14} className="animate-spin mr-2" />}
+            <Button variant="outline" onClick={() => setShowDialog(false)}>
+              Annuler
+            </Button>
+            <Button
+              onClick={handleSubmit}
+              disabled={createMutation.isPending || updateMutation.isPending}
+            >
+              {(createMutation.isPending || updateMutation.isPending) && (
+                <Loader2 size={14} className="animate-spin mr-2" />
+              )}
               {editingUser ? "Enregistrer" : "Créer"}
             </Button>
           </DialogFooter>
@@ -297,11 +404,19 @@ export default function UsersAdmin() {
         <DialogContent className="sm:max-w-sm">
           <DialogHeader>
             <DialogTitle>Supprimer l'utilisateur</DialogTitle>
-            <DialogDescription>Cette action est irréversible. L'utilisateur ne pourra plus se connecter.</DialogDescription>
+            <DialogDescription>
+              Cette action est irréversible. L'utilisateur ne pourra plus se connecter.
+            </DialogDescription>
           </DialogHeader>
           <DialogFooter>
-            <Button variant="outline" onClick={() => setDeleteId(null)}>Annuler</Button>
-            <Button variant="destructive" onClick={() => deleteId && deleteMutation.mutate({ id: deleteId })} disabled={deleteMutation.isPending}>
+            <Button variant="outline" onClick={() => setDeleteId(null)}>
+              Annuler
+            </Button>
+            <Button
+              variant="destructive"
+              onClick={() => deleteId && deleteMutation.mutate({ id: deleteId })}
+              disabled={deleteMutation.isPending}
+            >
               {deleteMutation.isPending && <Loader2 size={14} className="animate-spin mr-2" />}
               Supprimer
             </Button>
diff --git a/drizzle/schema.ts b/drizzle/schema.ts
index 5ec111e..f9c8d18 100644
--- a/drizzle/schema.ts
+++ b/drizzle/schema.ts
@@ -31,7 +31,8 @@ export type InsertUser = typeof users.$inferInsert;
 export const localUsers = mysqlTable("local_users", {
   id: int("id").autoincrement().primaryKey(),
   name: varchar("name", { length: 255 }).notNull(),
-  email: varchar("email", { length: 320 }).notNull().unique(),
+  username: varchar("username", { length: 128 }).unique(),
+  email: varchar("email", { length: 320 }),
   passwordHash: varchar("passwordHash", { length: 255 }).notNull(),
   role: mysqlEnum("role", ["admin", "user", "readonly"]).default("user").notNull(),
   isActive: boolean("isActive").default(true).notNull(),
@@ -115,3 +116,22 @@ export const importLogs = mysqlTable("import_logs", {
 
 export type ImportLog = typeof importLogs.$inferSelect;
 export type InsertImportLog = typeof importLogs.$inferInsert;
+
+// ─── Boîte à idées ───────────────────────────────────────────────────────────
+
+export const ideas = mysqlTable("ideas", {
+  id: int("id").autoincrement().primaryKey(),
+  userId: int("userId").notNull(),
+  userName: varchar("userName", { length: 255 }).notNull(),
+  titre: varchar("titre", { length: 512 }).notNull(),
+  message: text("message").notNull(),
+  statut: mysqlEnum("statut", ["ouvert", "en_cours", "resolu", "ferme"]).default("ouvert").notNull(),
+  reponseAdmin: text("reponseAdmin"),
+  reponduPar: varchar("reponduPar", { length: 255 }),
+  reponduAt: timestamp("reponduAt"),
+  createdAt: timestamp("createdAt").defaultNow().notNull(),
+  updatedAt: timestamp("updatedAt").defaultNow().onUpdateNow().notNull(),
+});
+
+export type Idea = typeof ideas.$inferSelect;
+export type InsertIdea = typeof ideas.$inferInsert;
diff --git a/server/db.ts b/server/db.ts
index bce1572..f3104e3 100644
--- a/server/db.ts
+++ b/server/db.ts
@@ -9,6 +9,8 @@ import {
   appSettings,
   importLogs,
   InsertLocalUser,
+  ideas,
+  InsertIdea,
 } from "../drizzle/schema";
 import { ENV } from "./_core/env";
 
@@ -70,6 +72,7 @@ export async function getLocalUsers() {
     .select({
       id: localUsers.id,
       name: localUsers.name,
+      username: localUsers.username,
       email: localUsers.email,
       role: localUsers.role,
       isActive: localUsers.isActive,
@@ -315,3 +318,45 @@ export async function getImportStats() {
     totalNewRows,
   };
 }
+
+// ─── Boîte à idées ────────────────────────────────────────────────────────────
+
+export async function createIdea(data: InsertIdea) {
+  const db = await getDb();
+  if (!db) throw new Error("Database not available");
+  await db.insert(ideas).values(data);
+}
+
+export async function getAllIdeas() {
+  const db = await getDb();
+  if (!db) return [];
+  return db.select().from(ideas).orderBy(desc(ideas.createdAt));
+}
+
+export async function getIdeasByUser(userId: number) {
+  const db = await getDb();
+  if (!db) return [];
+  return db.select().from(ideas).where(eq(ideas.userId, userId)).orderBy(desc(ideas.createdAt));
+}
+
+export async function repondreIdea(
+  id: number,
+  reponseAdmin: string,
+  reponduPar: string,
+  statut: "ouvert" | "en_cours" | "resolu" | "ferme"
+) {
+  const db = await getDb();
+  if (!db) throw new Error("Database not available");
+  await db.update(ideas).set({
+    reponseAdmin,
+    reponduPar,
+    reponduAt: new Date(),
+    statut,
+  }).where(eq(ideas.id, id));
+}
+
+export async function updateIdeaStatut(id: number, statut: "ouvert" | "en_cours" | "resolu" | "ferme") {
+  const db = await getDb();
+  if (!db) throw new Error("Database not available");
+  await db.update(ideas).set({ statut }).where(eq(ideas.id, id));
+}
diff --git a/server/localAuth.ts b/server/localAuth.ts
index d348db7..b00e10d 100644
--- a/server/localAuth.ts
+++ b/server/localAuth.ts
@@ -7,7 +7,7 @@ import { ENV } from "./_core/env";
 
 const SALT_ROUNDS = 12;
 const JWT_EXPIRY = "7d";
-const LOCAL_AUTH_COOKIE = "veille_local_auth";
+export const LOCAL_AUTH_COOKIE = "veille_local_auth";
 
 export async function hashPassword(password: string): Promise<string> {
   return bcrypt.hash(password, SALT_ROUNDS);
@@ -37,24 +37,30 @@ export async function verifyLocalToken(token: string): Promise<{ userId: number;
   }
 }
 
-export async function loginLocalUser(email: string, password: string) {
+/**
+ * Connexion par username OU email (insensible à la casse pour l'email).
+ * Le champ `identifier` peut être un nom d'utilisateur libre ou une adresse e-mail.
+ */
+export async function loginLocalUser(identifier: string, password: string) {
   const db = await getDb();
   if (!db) throw new Error("Base de données indisponible");
 
-  // Recherche par e-mail (insensible à la casse) OU par identifiant exact
-  const identifier = email.trim();
-  const users = await db
+  const id = identifier.trim();
+
+  // Cherche d'abord par username exact, puis par email (insensible à la casse)
+  const results = await db
     .select()
     .from(localUsers)
     .where(
       or(
-        eq(localUsers.email, identifier.toLowerCase()),
-        eq(localUsers.email, identifier)
+        eq(localUsers.username, id),
+        eq(localUsers.email, id.toLowerCase()),
+        eq(localUsers.email, id)
       )
     )
     .limit(1);
 
-  const user = users[0];
+  const user = results[0];
   if (!user || !user.isActive) {
     throw new Error("Identifiants incorrects ou compte désactivé");
   }
@@ -62,21 +68,29 @@ export async function loginLocalUser(email: string, password: string) {
   const valid = await verifyPassword(password, user.passwordHash);
   if (!valid) throw new Error("Identifiants incorrects ou compte désactivé");
 
-  // Mise à jour lastSignedIn
   await db
     .update(localUsers)
     .set({ lastSignedIn: new Date() })
     .where(eq(localUsers.id, user.id));
 
   const token = await generateLocalToken(user.id, user.role);
-  return { token, user: { id: user.id, name: user.name, email: user.email, role: user.role } };
+  return {
+    token,
+    user: {
+      id: user.id,
+      name: user.name,
+      username: user.username ?? null,
+      email: user.email ?? null,
+      role: user.role,
+    },
+  };
 }
 
 export async function getLocalUserById(id: number) {
   const db = await getDb();
   if (!db) return null;
-  const users = await db.select().from(localUsers).where(eq(localUsers.id, id)).limit(1);
-  return users[0] ?? null;
+  const results = await db.select().from(localUsers).where(eq(localUsers.id, id)).limit(1);
+  return results[0] ?? null;
 }
 
 export async function ensureAdminExists() {
@@ -93,11 +107,12 @@ export async function ensureAdminExists() {
     const hash = await hashPassword("Admin@Itinova2024!");
     await db.insert(localUsers).values({
       name: "Administrateur",
+      username: "admin",
       email: "admin@itinova.fr",
       passwordHash: hash,
       role: "admin",
       isActive: true,
     });
-    console.log("[LocalAuth] Compte admin par défaut créé : admin@itinova.fr / Admin@Itinova2024!");
+    console.log("[LocalAuth] Compte admin par défaut créé : admin / Admin@Itinova2024!");
   }
 }
diff --git a/server/routers.ts b/server/routers.ts
index 23e4351..2a9598c 100644
--- a/server/routers.ts
+++ b/server/routers.ts
@@ -17,6 +17,11 @@ import {
   createLocalUser,
   updateLocalUser,
   deleteLocalUser,
+  createIdea,
+  getAllIdeas,
+  getIdeasByUser,
+  repondreIdea,
+  updateIdeaStatut,
 } from "./db";
 import { importVeille, importAAP, runFullImport, getImportConfig } from "./importer";
 import { loginLocalUser, hashPassword, ensureAdminExists } from "./localAuth";
@@ -190,7 +195,8 @@ export const appRouter = router({
       .input(
         z.object({
           name: z.string().min(2).max(255),
-          email: z.string().email(),
+          username: z.string().min(2).max(128).optional(),
+          email: z.string().email().optional(),
           password: z.string().min(8),
           role: z.enum(["admin", "user", "readonly"]).default("user"),
         })
@@ -199,7 +205,8 @@ export const appRouter = router({
         const passwordHash = await hashPassword(input.password);
         await createLocalUser({
           name: input.name,
-          email: input.email.toLowerCase(),
+          username: input.username ?? null,
+          email: input.email ? input.email.toLowerCase() : null,
           passwordHash,
           role: input.role,
           isActive: true,
@@ -212,6 +219,7 @@ export const appRouter = router({
         z.object({
           id: z.number().int().positive(),
           name: z.string().min(2).max(255).optional(),
+          username: z.string().min(2).max(128).optional(),
           email: z.string().email().optional(),
           password: z.string().min(8).optional(),
           role: z.enum(["admin", "user", "readonly"]).optional(),
@@ -238,6 +246,67 @@ export const appRouter = router({
       return { success: true };
     }),
   }),
+
+  // ─── Boîte à idées ───────────────────────────────────────────────────────────
+  ideas: router({
+    // Créer une nouvelle idée / question
+    create: protectedProcedure
+      .input(
+        z.object({
+          titre: z.string().min(3).max(512),
+          message: z.string().min(10),
+        })
+      )
+      .mutation(async ({ input, ctx }) => {
+        await createIdea({
+          userId: ctx.user.id,
+          userName: ctx.user.name ?? ctx.user.email ?? "Utilisateur",
+          titre: input.titre,
+          message: input.message,
+        });
+        return { success: true };
+      }),
+
+    // Lister toutes les idées (admin) ou les siennes (user)
+    list: protectedProcedure.query(async ({ ctx }) => {
+      if (ctx.user.role === "admin") {
+        return getAllIdeas();
+      }
+      return getIdeasByUser(ctx.user.id);
+    }),
+
+    // Répondre à une idée (admin uniquement)
+    repondre: adminProcedure
+      .input(
+        z.object({
+          id: z.number().int().positive(),
+          reponseAdmin: z.string().min(1),
+          statut: z.enum(["ouvert", "en_cours", "resolu", "ferme"]),
+        })
+      )
+      .mutation(async ({ input, ctx }) => {
+        await repondreIdea(
+          input.id,
+          input.reponseAdmin,
+          ctx.user.name ?? ctx.user.email ?? "Admin",
+          input.statut
+        );
+        return { success: true };
+      }),
+
+    // Changer le statut (admin uniquement)
+    updateStatut: adminProcedure
+      .input(
+        z.object({
+          id: z.number().int().positive(),
+          statut: z.enum(["ouvert", "en_cours", "resolu", "ferme"]),
+        })
+      )
+      .mutation(async ({ input }) => {
+        await updateIdeaStatut(input.id, input.statut);
+        return { success: true };
+      }),
+  }),
 });
 
 export type AppRouter = typeof appRouter;