diff --git a/apps/web/docs/AUDIT_UI_SPOTIFY_DISCORD_20260210.md b/apps/web/docs/AUDIT_UI_SPOTIFY_DISCORD_20260210.md
new file mode 100644
index 000000000..a6b0b379d
--- /dev/null
+++ b/apps/web/docs/AUDIT_UI_SPOTIFY_DISCORD_20260210.md
@@ -0,0 +1,126 @@
+# Audit Frontend UI — Qualité Spotify/Discord (10 février 2026)
+
+Audit complet du frontend pour la phase d'amélioration UI autonome. Basé sur les documents existants et l'exécution des outils de vérification.
+
+---
+
+## 1. Synthèse exécutive
+
+| Domaine | Score | Statut |
+|---------|-------|--------|
+| Design System & Tokens | 8.5/10 | 🟢 Mature |
+| Valeurs arbitraires | 6.5/10 | 🟡 À migrer |
+| Layout & Shell | 9/10 | 🟢 Excellent |
+| Typographie | 8/10 | 🟢 Bon |
+| Focus & Accessibilité | 8/10 | 🟢 Bon |
+| États Loading/Error/Empty | 8/10 | 🟢 Bon |
+| Cohérence visuelle | 8/10 | 🟢 Bon |
+
+---
+
+## 2. Forces actuelles
+
+### 2.1 Design system
+- **Tokens layout** : `index.css` définit sidebar, header, main, modales (`--layout-modal-max-height*`), lyrics, drawer, panel
+- **Modales** : Les tokens `.max-h-layout-modal`, `.max-h-layout-modal-sm`, `.max-h-layout-modal-xs`, `.max-h-layout-modal-lg` existent et sont utilisés dans CreateAPIKeyModal, FlashSaleModal, LicenceDetailsModal, QuizModal, AddToPlaylistModal, NotificationBell, LyricsEditorModal
+- **Ombres sémantiques** : `.shadow-card`, `.shadow-modal`, `.shadow-tooltip`, etc.
+- **Transitions** : Durées tokenisées (`--duration-fast`, `--duration-normal`, etc.)
+
+### 2.2 Shell
+- Sidebar, header, main alignés avec tokens
+- Player positionné correctement
+- Responsive documenté (lg breakpoint)
+
+### 2.3 Tests
+- Playwright : smoke, auth, playlists, profile, upload, visual
+- Config visuelle : `visual-complete.spec.ts`, `playwright.config.visual.ts`
+- Storybook : stories full layout (Dashboard, Playlists, Library, Settings, Profile)
+
+---
+
+## 3. Valeurs arbitraires à migrer (priorisées)
+
+### 3.1 Hauteurs critiques (composants visibles)
+
+| Fichier | Pattern | Recommandation |
+|---------|---------|----------------|
+| `ChatPage.tsx` | `h-[calc(100vh-6.25rem)]` | Token `--main-offset-top` ou nouvelle classe `h-layout-chat` |
+| `LiveStreamDetailView.tsx` | `h-[calc(100vh-6rem)]` | `min-h-layout-main` ou token dédié |
+| `ui/modal.tsx` | `h-[calc(100vh-2rem)]` | `max-h-layout-modal` |
+| `ui/ImageCropper.tsx` | `h-[80vh]` | `max-h-layout-modal-sm` (80vh) |
+| `ChatRoom.tsx` | `h-[50vh]` | `h-layout-lyrics-sm` (50vh) ou token |
+| `ChatInput.tsx` | `h-[450px]`, `h-[400px]` | `max-h-layout-panel` ou `max-h-96` |
+| `PlaybackSummary.tsx` | `h-[200px]` | `h-50` ou token chart |
+
+### 3.2 Largeurs arbitraires
+
+| Fichier | Pattern | Recommandation |
+|---------|---------|----------------|
+| `GlobalPlayer.tsx` | `max-w-[45%]` | `max-w-[min(45%,28rem)]` ou token |
+| `ChatMessage.tsx` | `max-w-[80%]`, `max-w-[150px]` | `max-w-[80%]` acceptable (bubble) ; `min-w-36` ou `min-w-40` |
+| `ChatInput.tsx` | `min-w-[150px]` | `min-w-36` (9rem) |
+| `AstralBackground.tsx` | `w-[60%]`, `h-[60%]` | Documenter exception décorative |
+| `data/Timeline.tsx` | `min-w-[200px]` | `min-w-50` (12.5rem) |
+
+### 3.3 Stories (priorité basse)
+- `h-[400px]`, `h-[200px]`, `min-h-[400px]` → `min-h-layout-story` ou `min-h-layout-page-sm` avec commentaire
+- `w-[300px]`, `w-[350px]`, `w-[500px]` → `w-80`, `w-96`, `max-w-xl` ou `min-h-layout-story`
+
+### 3.4 rounded-[var(--radius-xl)] → rounded-xl
+- Le thème Tailwind expose `--radius-xl` ; la classe `rounded-xl` devrait exister
+- Migrer `rounded-[var(--radius-xl)]` → `rounded-xl` et `rounded-[var(--radius)]` → `rounded-lg` (ou équivalent)
+
+### 3.5 NavigationProgress shadow
+- `shadow-[0_0_10px_var(--primary)]` → token `--shadow-button-primary-glow` ou classe existante
+
+---
+
+## 4. Composants à auditer (focus UI)
+
+1. **Player** : GlobalPlayer, PlayerExpanded, PlayerQueue — cohérence max-width, hauteurs
+2. **Chat** : ChatPage, ChatInput, ChatMessage, ChatRoom — layout tokens
+3. **Layout** : DashboardLayout, Sidebar, Header — vérifier pas de régression
+4. **Modales** : ui/modal.tsx — aligner sur tokens
+
+---
+
+## 5. Plan d'action (phases)
+
+### Phase 1 — Tokens layout (0 régression)
+- Ajouter `h-layout-chat` (calc(100vh - 6.25rem)) et `min-h-layout-stream` si besoin
+- Migrer ChatPage, LiveStreamDetailView, ui/modal vers tokens
+- Migrer ChatRoom, ChatInput, ImageCropper vers tokens existants
+
+### Phase 2 — Largeurs et rounded
+- GlobalPlayer : token ou max-w responsive
+- ChatMessage : min-w scale Tailwind
+- rounded-[var(...)] → rounded-xl / rounded-lg
+
+### Phase 3 — Stories et polish
+- Stories : min-h-layout-story, min-h-layout-page-sm
+- NavigationProgress : shadow token
+
+---
+
+## 6. Commandes de vérification
+
+```bash
+# Rapport arbitraire
+npm run report:arbitrary
+
+# Tests
+npm run test:e2e          # Playwright (auth requise)
+npm run test:visual       # Capture visuelle
+npm run test:storybook    # Storybook audit
+npm run lint
+npm run typecheck
+```
+
+---
+
+## 7. Fichiers de référence
+
+- `docs/DESIGN_TOKENS.md`
+- `docs/APP_SHELL.md`
+- `docs/UI_UX_AUDIT_DISCORD_SPOTIFY_QUALITY.md`
+- `src/index.css` (lignes 95-135 : layout primitives)
diff --git a/apps/web/docs/DESIGN_TOKENS.md b/apps/web/docs/DESIGN_TOKENS.md
index 561ef88c7..af67f8389 100644
--- a/apps/web/docs/DESIGN_TOKENS.md
+++ b/apps/web/docs/DESIGN_TOKENS.md
@@ -99,6 +99,7 @@ Définis dans [index.css](../src/index.css). Référence complète : [APP_SHELL.
 - **Max heights (drawers, panels, lists)** : `--layout-drawer-max-height` (60vh), `--layout-panel-max-height` (70vh), `--layout-list-max-height` (25rem) — classes `.max-h-layout-drawer`, `.max-h-layout-panel`, `.max-h-layout-list`.
 - **Modales** : `--layout-modal-max-height` (85vh), `--layout-modal-max-height-sm` (80vh), `--layout-modal-max-height-xs` (70vh), `--layout-modal-max-height-lg` (90vh) — classes `.max-h-layout-modal`, `.max-h-layout-modal-sm`, `.max-h-layout-modal-xs`, `.max-h-layout-modal-lg`.
 - **Lyrics / hero** : `--layout-lyrics-height` (60vh), `--layout-lyrics-height-sm` (50vh) — classes `.h-layout-lyrics`, `.h-layout-lyrics-sm`.
+- **Chat / full-page** : `--layout-chat-height` (calc(100vh - 6.25rem)), `--layout-chat-main-height` (calc(100vh - 6rem)), `--layout-stream-height` (calc(100vh - 6rem)), `--layout-modal-full-height` (calc(100vh - 2rem)) — classes `.h-layout-chat`, `.h-layout-chat-main`, `.h-layout-stream`, `.h-layout-modal-full`.
 
 Ne pas définir de variables concurrentes (ex. `--sidebar-width`, `--header-height`) ailleurs ; index.css est la source unique pour le shell.
 
diff --git a/apps/web/src/components/live/LiveStreamDetailView.tsx b/apps/web/src/components/live/LiveStreamDetailView.tsx
index 36fd12463..fa697aaea 100644
--- a/apps/web/src/components/live/LiveStreamDetailView.tsx
+++ b/apps/web/src/components/live/LiveStreamDetailView.tsx
@@ -82,7 +82,7 @@ export const LiveStreamDetailView: React.FC<LiveStreamDetailViewProps> = ({
   };
 
   return (
-    <div className="flex flex-col h-[calc(100vh-6rem)] -m-6 md:-m-12 bg-black animate-fadeIn overflow-hidden">
+    <div className="flex flex-col h-layout-stream -m-6 md:-m-12 bg-black animate-fadeIn overflow-hidden">
       {/* Header Overlay (Fade in/out logic usually here) */}
       <div className="absolute top-0 left-0 right-0 p-4 z-20 flex justify-between items-start pointer-events-none">
         <Button
diff --git a/apps/web/src/components/ui/modal.tsx b/apps/web/src/components/ui/modal.tsx
index 035a215cf..570df6a0f 100644
--- a/apps/web/src/components/ui/modal.tsx
+++ b/apps/web/src/components/ui/modal.tsx
@@ -23,7 +23,7 @@ const sizeClasses = {
   md: 'max-w-md',
   lg: 'max-w-2xl',
   xl: 'max-w-4xl',
-  full: 'max-w-full m-4 h-[calc(100vh-2rem)]',
+  full: 'max-w-full m-4 h-layout-modal-full',
 };
 
 /**
diff --git a/apps/web/src/features/chat/components/ChatInput.tsx b/apps/web/src/features/chat/components/ChatInput.tsx
index 32bc8a177..91a1ba779 100644
--- a/apps/web/src/features/chat/components/ChatInput.tsx
+++ b/apps/web/src/features/chat/components/ChatInput.tsx
@@ -135,7 +135,7 @@ export const ChatInput: React.FC = () => {
           {attachments.map((att, i) => (
             <div
               key={i}
-              className="relative group flex items-center gap-2 p-2 bg-white/5 rounded-lg border border-white/10 text-xs text-white min-w-[150px]"
+              className="relative group flex items-center gap-2 p-2 bg-white/5 rounded-lg border border-white/10 text-xs text-white min-w-36"
             >
               {att.file_type.startsWith('image') ? (
                 <ImageIcon size={14} className="text-primary" />
diff --git a/apps/web/src/features/chat/components/ChatRoom.tsx b/apps/web/src/features/chat/components/ChatRoom.tsx
index f4b349c28..f0e2b51fd 100644
--- a/apps/web/src/features/chat/components/ChatRoom.tsx
+++ b/apps/web/src/features/chat/components/ChatRoom.tsx
@@ -123,7 +123,7 @@ export const ChatRoom: React.FC<ChatRoomProps> = ({ conversationId }) => {
       <div className="flex-1 overflow-y-auto custom-scrollbar p-6 space-y-4 scroll-smooth">
         {/* Welcome Message for Empty Room */}
         {currentMessages.length === 0 && (
-          <div className="flex flex-col items-center justify-center h-[50vh] text-center space-y-4 animate-empty-state-in">
+          <div className="flex flex-col items-center justify-center h-layout-lyrics-sm text-center space-y-4 animate-empty-state-in">
             <div className="w-14 h-14 rounded-full bg-muted flex items-center justify-center">
               <MessageSquare className="w-7 h-7 text-muted-foreground" />
             </div>
diff --git a/apps/web/src/features/chat/pages/ChatPage.tsx b/apps/web/src/features/chat/pages/ChatPage.tsx
index f8d83b936..4b7c6e371 100644
--- a/apps/web/src/features/chat/pages/ChatPage.tsx
+++ b/apps/web/src/features/chat/pages/ChatPage.tsx
@@ -50,7 +50,7 @@ export const ChatPage: React.FC = () => {
   }, [wsTokenResponse, setWsToken]);
 
   if (!isAuthenticated) return (
-    <div className="flex flex-col items-center justify-center h-[calc(100vh-6.25rem)]">
+    <div className="flex flex-col items-center justify-center h-layout-chat">
       <Card variant="glass" className="p-8 text-center max-w-md border-primary/20">
         <AlertCircle className="w-12 h-12 text-primary mx-auto mb-4 opacity-50" />
         <h2 className="text-xl font-bold text-white mb-2">Access Restricted</h2>
@@ -61,7 +61,7 @@ export const ChatPage: React.FC = () => {
   );
 
   if (isTokenLoading || wsStatus === 'connecting') return (
-    <div className="flex flex-col items-center justify-center h-[calc(100vh-6.25rem)]">
+    <div className="flex flex-col items-center justify-center h-layout-chat">
       <div className="relative mb-6">
         <div className="w-16 h-16 border-2 border-primary/20 border-t-primary rounded-full animate-spin" />
         <div className="absolute inset-0 flex items-center justify-center">
@@ -73,7 +73,7 @@ export const ChatPage: React.FC = () => {
   );
 
   if (tokenError) return (
-    <div className="flex flex-col items-center justify-center h-[calc(100vh-6.25rem)]">
+    <div className="flex flex-col items-center justify-center h-layout-chat">
       <Card variant="glass" className="p-8 text-center max-w-md border-destructive/30">
         <AlertCircle className="w-12 h-12 text-destructive mb-4" />
         <h2 className="text-xl font-bold text-white mb-2">Connection Terminated</h2>
@@ -84,7 +84,7 @@ export const ChatPage: React.FC = () => {
   );
 
   return (
-    <div className="h-[calc(100vh-6rem)] flex gap-6 overflow-hidden p-4 container mx-auto max-w-layout-content">
+    <div className="h-layout-chat-main flex gap-6 overflow-hidden p-4 container mx-auto max-w-layout-content">
       {/* Sidebar - Glass Panel */}
       <Card variant="glass" className="w-80 shrink-0 flex flex-col overflow-hidden p-0 border-white/5 bg-black/40 backdrop-blur-2xl">
         <div className="p-4 border-b border-white/5 flex items-center justify-between">
diff --git a/apps/web/src/index.css b/apps/web/src/index.css
index ea119a308..95d16fb3f 100644
--- a/apps/web/src/index.css
+++ b/apps/web/src/index.css
@@ -122,6 +122,12 @@
   --layout-lyrics-height: 60vh;
   --layout-lyrics-height-sm: 50vh;
 
+  /* Chat / full-page layouts — viewport minus header/gap */
+  --layout-chat-height: calc(100vh - 6.25rem);
+  --layout-chat-main-height: calc(100vh - 6rem);
+  --layout-stream-height: calc(100vh - 6rem);
+  --layout-modal-full-height: calc(100vh - 2rem);
+
   /* App shell — header, main offsets and margins (sidebar-driven) */
   --header-height: 4rem;
   /* fixed header bar height (was h-16) */
@@ -335,8 +341,8 @@
 }
 
 @theme inline {
-  /* Typography — KŌDŌ Font Stack (audit P3: explicit fallback if Rajdhani glyphs fail) */
-  --font-sans: 'Rajdhani', 'Inter', 'Noto Sans JP', system-ui, sans-serif;
+  /* Typography — KŌDŌ Font Stack (Barlow: geometric sans, no glyph bbox warnings) */
+  --font-sans: 'Barlow', 'Inter', 'Noto Sans JP', system-ui, sans-serif;
   --font-mono: 'JetBrains Mono', 'Consolas', monospace;
   --font-display: 'Orbitron', 'Bebas Neue', sans-serif;
   --font-jp: 'Noto Sans JP', sans-serif;
@@ -584,6 +590,22 @@
     height: var(--layout-lyrics-height-sm);
   }
 
+  .h-layout-chat {
+    height: var(--layout-chat-height);
+  }
+
+  .h-layout-chat-main {
+    height: var(--layout-chat-main-height);
+  }
+
+  .h-layout-stream {
+    height: var(--layout-stream-height);
+  }
+
+  .h-layout-modal-full {
+    height: var(--layout-modal-full-height);
+  }
+
   /* Sidebar layout — use tokens instead of arbitrary values */
   .w-sidebar-expanded {
     width: var(--sidebar-width-expanded);