feat: HUD bar — stats persistantes sous le header

Barre compacte toujours visible : nom+level, HP, endurance+timer regen,
XP, or, quêtes actives (avec compteur "prêtes !").
Timer live : "+1 dans X:XX" quand endurance < max.
Auto-refresh 30s pour l'endurance, 60s pour les quêtes.
Chaque section cliquable vers la page correspondante.

frontend/src/components/HudBar.tsx

@@ -0,0 +1,128 @@
+import { useQuery } from '@tanstack/react-query';
+import { Link } from 'react-router-dom';
+import { characterApi, questApi } from '../api/endpoints';
+import { Heart, Zap, Star, Coins, Scroll, Clock } from 'lucide-react';
+import { useState, useEffect } from 'react';
+
+function RegenTimer({ endurance, enduranceMax, lastEnduranceTs }: { endurance: number; enduranceMax: number; lastEnduranceTs: string }) {
+  const [now, setNow] = useState(Date.now());
+
+  useEffect(() => {
+    if (endurance >= enduranceMax) return;
+    const id = setInterval(() => setNow(Date.now()), 1000);
+    return () => clearInterval(id);
+  }, [endurance, enduranceMax]);
+
+  if (endurance >= enduranceMax) return null;
+
+  // Regen = 1pt every 3min = 180s
+  const elapsedMs = now - new Date(lastEnduranceTs).getTime();
+  const elapsedInCycle = elapsedMs % (3 * 60 * 1000);
+  const remainingMs = 3 * 60 * 1000 - elapsedInCycle;
+  const remainingSec = Math.max(0, Math.floor(remainingMs / 1000));
+  const min = Math.floor(remainingSec / 60);
+  const sec = remainingSec % 60;
+
+  return (
+    <span style={{ fontSize: 9, color: '#5ba4f5' }}>
+      <Clock size={8} style={{ display: 'inline', marginRight: 2 }} />
+      +1 dans {min}:{sec.toString().padStart(2, '0')}
+    </span>
+  );
+}
+
+export function HudBar() {
+  const { data: char } = useQuery({
+    queryKey: ['character'],
+    queryFn: characterApi.me,
+    refetchInterval: 30_000, // refresh every 30s for endurance updates
+  });
+
+  const { data: activeQuests } = useQuery({
+    queryKey: ['questsActive'],
+    queryFn: questApi.active,
+    refetchInterval: 60_000,
+  });
+
+  if (!char) return null;
+
+  const endurance = (char as any).enduranceCurrent ?? (char as any).endurance ?? 0;
+  const xpNext = (char as any).xpToNextLevel ?? Math.round(100 * Math.pow(char.level, 1.5));
+  const questCount = activeQuests?.filter((pq: any) => pq.status === 'active').length ?? 0;
+  const questReady = activeQuests?.filter((pq: any) => pq.status === 'completed').length ?? 0;
+
+  return (
+    <div style={{
+      background: '#111620',
+      borderBottom: '1px solid #1e2535',
+      padding: '4px 1rem',
+      display: 'flex',
+      alignItems: 'center',
+      gap: 16,
+      fontSize: 11,
+      color: '#6b7a99',
+      flexWrap: 'wrap',
+    }}>
+      {/* Name + Level */}
+      <Link to="/dashboard" style={{ textDecoration: 'none', display: 'flex', alignItems: 'center', gap: 6 }}>
+        <span style={{ fontSize: 14 }}>🐸</span>
+        <span style={{ fontWeight: 700, color: '#dce4f0', fontSize: 12 }}>{char.name}</span>
+        <span style={{ color: '#6b7a99' }}>Niv.{char.level}</span>
+      </Link>
+
+      <span style={{ color: '#2a3448' }}>|</span>
+
+      {/* HP */}
+      <Link to="/dashboard" style={{ textDecoration: 'none', display: 'flex', alignItems: 'center', gap: 4 }}>
+        <Heart size={10} color="#e84040" />
+        <span style={{ color: char.hpCurrent < char.hpMax ? '#e84040' : '#6b7a99' }}>
+          {char.hpCurrent}/{char.hpMax}
+        </span>
+      </Link>
+
+      <span style={{ color: '#2a3448' }}>|</span>
+
+      {/* Endurance + timer */}
+      <Link to="/dashboard" style={{ textDecoration: 'none', display: 'flex', alignItems: 'center', gap: 4 }}>
+        <Zap size={10} color="#5ba4f5" />
+        <span style={{ color: endurance < 5 ? '#e84040' : '#6b7a99' }}>
+          {endurance}/{char.enduranceMax}
+        </span>
+        {(char as any).lastEnduranceTs && (
+          <RegenTimer
+            endurance={endurance}
+            enduranceMax={char.enduranceMax}
+            lastEnduranceTs={(char as any).lastEnduranceTs}
+          />
+        )}
+      </Link>
+
+      <span style={{ color: '#2a3448' }}>|</span>
+
+      {/* XP */}
+      <Link to="/dashboard" style={{ textDecoration: 'none', display: 'flex', alignItems: 'center', gap: 4 }}>
+        <Star size={10} color="#a78bfa" />
+        <span>{char.xp}/{xpNext}</span>
+      </Link>
+
+      <span style={{ color: '#2a3448' }}>|</span>
+
+      {/* Gold */}
+      <span style={{ display: 'flex', alignItems: 'center', gap: 4 }}>
+        <Coins size={10} color="#f4c94e" />
+        <span>{char.gold}</span>
+      </span>
+
+      <span style={{ color: '#2a3448' }}>|</span>
+
+      {/* Quests */}
+      <Link to="/quests" style={{ textDecoration: 'none', display: 'flex', alignItems: 'center', gap: 4 }}>
+        <Scroll size={10} color={questReady > 0 ? '#f4c94e' : '#6b7a99'} />
+        <span>{questCount} quête{questCount !== 1 ? 's' : ''}</span>
+        {questReady > 0 && (
+          <span style={{ color: '#f4c94e', fontWeight: 700 }}>({questReady} prête{questReady > 1 ? 's' : ''} !)</span>
+        )}
+      </Link>
+    </div>
+  );
+}

frontend/src/components/Layout.tsx

@@ -1,6 +1,7 @@
 import { Link, useLocation } from 'react-router-dom';
 import { useAuth } from '../context/AuthContext';
 import { Swords, Package, Hammer, User, LogOut, Shield, Scroll } from 'lucide-react';
+import { HudBar } from './HudBar';
 
 const NAV = [
   { to: '/dashboard', icon: User,    label: 'Personnage' },
@@ -44,6 +45,7 @@ export function Layout({ children }: { children: React.ReactNode }) {
         )}
       </header>
 
+      <HudBar />
       <div style={{ display: 'flex', flex: 1 }}>
         {/* Sidebar nav */}
         <nav style={{