Refonte page de connexion : vraies photos Unsplash, thème unique

- Fond de connexion : diaporama de photos Unsplash hotlinkées (jamais
  réhébergées) avec attribution photographe + Unsplash toujours visible,
  conforme aux règles d'usage de l'API (download tracking déclenché).
- Suppression complète du switch thème clair/sombre : plus qu'un seul
  thème assumé (ThemeContext, darkMode Tailwind et .dark CSS retirés).
- Nouveau favicon minimaliste (l'ancien logo violet dégradé remplacé
  par un mark plat noir/citron vert cohérent avec la nouvelle DA).
- Suppression des doodles décoratifs, devenus superflus sur une vraie
  photo, pour un rendu plus sobre.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/src/App.tsx

@@ -6,7 +6,6 @@ import { PhotosView } from './components/photos/PhotosView';
 import { SettingsView } from './components/settings/SettingsView';
 import { NavigationProvider, useNavigation } from './contexts/NavigationContext';
 import { SessionProvider, useSession } from './contexts/SessionContext';
-import { ThemeProvider } from './contexts/ThemeContext';
 
 /** Content router — a plain state switch (NavigationContext.nav), no react-router. */
 function AppContent() {
@@ -41,10 +40,8 @@ function Root() {
 
 export default function App() {
   return (
-    <ThemeProvider>
-      <SessionProvider>
-        <Root />
-      </SessionProvider>
-    </ThemeProvider>
+    <SessionProvider>
+      <Root />
+    </SessionProvider>
   );
 }

app/src/components/auth/AuthBackground.tsx

@@ -1,46 +1,55 @@
-import { BACKGROUND_SCENES } from '../../lib/backgrounds';
+import { BACKGROUND_PHOTOS } from '../../lib/backgrounds';
 import { useBackgroundCrossfade } from '../../hooks/useBackgroundCrossfade';
 
+/**
+ * Photos hotlinkées depuis Unsplash (jamais copiées sur notre serveur) —
+ * requis par leur charte développeur. L'attribution ci-dessous (nom du
+ * photographe + Unsplash, tous deux liés) est également requise, pas
+ * décorative : elle doit rester visible en permanence, pas seulement
+ * au survol.
+ */
 export function AuthBackground() {
   const activeIndex = useBackgroundCrossfade();
+  const active = BACKGROUND_PHOTOS[activeIndex];
 
   return (
-    <div className="absolute inset-0 overflow-hidden bg-[#f4efe6]">
-      {BACKGROUND_SCENES.map((scene, i) => (
-        <div
-          key={scene.id}
-          className="absolute inset-0 transition-opacity duration-[2400ms] ease-in-out"
-          style={{ opacity: i === activeIndex ? 1 : 0, background: scene.base }}
-        >
-          {scene.blobs.map((blob, bi) => (
-            <div
-              key={bi}
-              className="tc-drift absolute rounded-full blur-[90px]"
-              style={{
-                top: blob.top,
-                left: blob.left,
-                width: blob.size,
-                height: blob.size,
-                background: blob.color,
-                animationDelay: `${bi * -7}s`,
-              }}
-            />
-          ))}
-        </div>
+    <div className="absolute inset-0 overflow-hidden bg-[#171410]">
+      {BACKGROUND_PHOTOS.map((photo, i) => (
+        <img
+          key={photo.id}
+          src={photo.url}
+          alt=""
+          aria-hidden="true"
+          className="absolute inset-0 h-full w-full object-cover transition-opacity duration-[2400ms] ease-in-out"
+          style={{ opacity: i === activeIndex ? 1 : 0 }}
+        />
       ))}
 
-      {/* Grain léger : casse l'effet "dégradé plat", donne une texture
-          plus organique - technique courante sur les fonds génératifs. */}
-      <svg className="absolute inset-0 h-full w-full opacity-[0.05] mix-blend-multiply" aria-hidden="true">
-        <filter id="tc-grain">
-          <feTurbulence type="fractalNoise" baseFrequency="0.85" numOctaves="2" stitchTiles="stitch" />
-        </filter>
-        <rect width="100%" height="100%" filter="url(#tc-grain)" />
-      </svg>
+      {/* Voile sombre pour garantir la lisibilité du texte clair par-dessus
+          une vraie photo, plus prononcé à gauche où vit le contenu. */}
+      <div className="absolute inset-0 bg-[linear-gradient(100deg,rgba(15,13,9,0.78)_0%,rgba(15,13,9,0.5)_46%,rgba(15,13,9,0.22)_75%)]" />
+      <div className="absolute inset-0 bg-[linear-gradient(0deg,rgba(15,13,9,0.35)_0%,transparent_30%)]" />
 
-      {/* Léger éclaircissement côté texte (gauche) pour garantir le
-          contraste de l'encre noire, sans jamais assombrir le fond. */}
-      <div className="absolute inset-0 bg-[linear-gradient(100deg,rgba(250,247,241,0.55)_0%,rgba(250,247,241,0.2)_42%,transparent_68%)]" />
+      <div className="absolute bottom-5 right-5 z-10 rounded-full bg-black/35 px-3.5 py-1.5 text-[11.5px] font-medium text-white/80 backdrop-blur-md sm:bottom-7 sm:right-7">
+        Photo par{' '}
+        <a
+          href={active.photographerUrl}
+          target="_blank"
+          rel="noopener noreferrer"
+          className="underline decoration-white/40 underline-offset-2 hover:text-white hover:decoration-white"
+        >
+          {active.photographerName}
+        </a>{' '}
+        sur{' '}
+        <a
+          href="https://unsplash.com/?utm_source=tripoli_cloud&utm_medium=referral"
+          target="_blank"
+          rel="noopener noreferrer"
+          className="underline decoration-white/40 underline-offset-2 hover:text-white hover:decoration-white"
+        >
+          Unsplash
+        </a>
+      </div>
     </div>
   );
 }

app/src/components/auth/AuthLayout.tsx

@@ -1,43 +1,38 @@
 import { AuthBackground } from './AuthBackground';
 import { AuthPanel } from './AuthPanel';
-import { DoodleArrow, DoodleSquiggle } from './Doodle';
 import { TripoliLogo, TripoliWordmark } from '../layout/TripoliLogo';
 
 export function AuthLayout() {
   return (
-    <div className="relative min-h-screen overflow-hidden bg-[#f4efe6]">
+    <div className="relative min-h-screen overflow-hidden bg-[#171410]">
       <AuthBackground />
 
       <div className="relative flex min-h-screen flex-col justify-between gap-11 p-6 sm:p-10 lg:p-[60px]">
-        <div className="flex items-center gap-2.5 text-ink">
+        <div className="flex items-center gap-2.5 text-white">
           <TripoliLogo size={30} variant="hero" />
           <TripoliWordmark className="text-base" />
         </div>
 
         <div className="flex flex-wrap items-center justify-between gap-8 sm:gap-14 lg:gap-[72px]">
-          <div className="relative min-w-0 max-w-[560px] flex-1 basis-[340px] text-ink">
-            <DoodleSquiggle className="absolute -left-2 -top-9 h-9 w-14 text-ink/70 sm:-top-11" />
-            <span className="inline-flex items-center gap-2 rounded-full border border-ink/16 bg-panel/70 px-[13px] py-1.5 text-xs font-semibold tracking-wide text-ink-soft backdrop-blur-md">
+          <div className="min-w-0 max-w-[560px] flex-1 basis-[340px] text-white">
+            <span className="inline-flex items-center gap-2 rounded-full border border-white/20 bg-white/10 px-[13px] py-1.5 text-xs font-semibold tracking-wide text-white/85 backdrop-blur-md">
               <span className="h-1.5 w-1.5 animate-tc-pulse rounded-full bg-success" />
               Coffre-fort en ligne
             </span>
-            <h1 className="m-0 my-4 font-display text-[38px] font-semibold leading-[1.05] tracking-tight text-balance text-ink sm:text-[52px] lg:text-[66px]">
+            <h1 className="m-0 my-4 font-display text-[38px] font-semibold leading-[1.05] tracking-tight text-balance text-white sm:text-[52px] lg:text-[66px]">
               Vos documents,
               <br />
-              <span className="italic">
-                sous <span className="tc-highlight">clé</span>.
-              </span>
+              <span className="italic">sous clé.</span>
             </h1>
-            <p className="m-0 max-w-[44ch] text-[15px] leading-relaxed text-ink-soft sm:text-[17.5px]">
+            <p className="m-0 max-w-[44ch] text-[15px] leading-relaxed text-white/70 sm:text-[17.5px]">
               Documents, photos et sauvegardes sur un serveur que vous contrôlez.
             </p>
-            <DoodleArrow className="mt-6 hidden h-11 w-14 text-ink/60 sm:block" />
           </div>
 
           <AuthPanel />
         </div>
 
-        <div className="flex flex-wrap gap-5 text-xs text-ink-soft">
+        <div className="flex flex-wrap gap-5 text-xs text-white/60">
           <span>Tripoli Cloud — 2026</span>
           <span>Hébergé sur votre propre serveur</span>
           <span>Sans publicité, sans traçage</span>

app/src/components/auth/Doodle.tsx

@@ -1,35 +0,0 @@
-/** Petits traits dessinés à la main, en accent décoratif - inspirés du
- * ton "studiocart.co" : jamais informatifs, purement une touche humaine
- * dans une interface par ailleurs très structurée. */
-export function DoodleSquiggle({ className }: { className?: string }) {
-  return (
-    <svg viewBox="0 0 60 40" fill="none" className={className} aria-hidden="true">
-      <path
-        d="M4 30C10 6 22 4 26 16C29 25 40 27 44 14C46 8 50 6 56 8"
-        stroke="currentColor"
-        strokeWidth="3"
-        strokeLinecap="round"
-      />
-    </svg>
-  );
-}
-
-export function DoodleArrow({ className }: { className?: string }) {
-  return (
-    <svg viewBox="0 0 54 46" fill="none" className={className} aria-hidden="true">
-      <path
-        d="M6 6C22 10 40 18 46 36"
-        stroke="currentColor"
-        strokeWidth="3"
-        strokeLinecap="round"
-      />
-      <path
-        d="M32 34C38 36 43 37 47 37C46 33 45 28 45 23"
-        stroke="currentColor"
-        strokeWidth="3"
-        strokeLinecap="round"
-        strokeLinejoin="round"
-      />
-    </svg>
-  );
-}

app/src/components/layout/TopBar.tsx

@@ -1,11 +1,9 @@
-import { Menu, Moon, Search, Sun } from 'lucide-react';
-import { useTheme } from '../../contexts/ThemeContext';
+import { Menu, Search } from 'lucide-react';
 import { useNavigation } from '../../contexts/NavigationContext';
 import { useIsMobile } from '../../hooks/useIsMobile';
 import { NotificationCenter } from '../notifications/NotificationCenter';
 
 export function TopBar() {
-  const { theme, toggleTheme } = useTheme();
   const { openDrawer } = useNavigation();
   const isMobile = useIsMobile();
 
@@ -32,14 +30,6 @@ export function TopBar() {
       </div>
 
       <div className="ml-auto flex items-center gap-2">
-        <button
-          type="button"
-          onClick={toggleTheme}
-          aria-label="Basculer clair / sombre"
-          className="flex h-[38px] w-[38px] items-center justify-center rounded-[11px] border border-line bg-field text-ink"
-        >
-          {theme === 'dark' ? <Moon size={17} strokeWidth={1.8} /> : <Sun size={17} strokeWidth={1.8} />}
-        </button>
         <NotificationCenter />
       </div>
     </header>

app/src/components/layout/TripoliLogo.tsx

@@ -5,8 +5,8 @@ interface TripoliLogoProps {
 
 /** Minimalist inline SVG mark — no external asset, easy to swap later. */
 export function TripoliLogo({ size = 28, variant = 'sidebar' }: TripoliLogoProps) {
-  const badgeFill = variant === 'hero' ? 'rgba(23,20,14,0.05)' : 'rgba(91,140,255,0.14)';
-  const badgeStroke = variant === 'hero' ? 'rgba(23,20,14,0.16)' : 'rgba(91,140,255,0.36)';
+  const badgeFill = variant === 'hero' ? 'rgba(255,255,255,0.12)' : 'rgba(91,140,255,0.14)';
+  const badgeStroke = variant === 'hero' ? 'rgba(255,255,255,0.28)' : 'rgba(91,140,255,0.36)';
 
   return (
     <svg width={size} height={size} viewBox="0 0 32 32" fill="none" aria-hidden="true">

app/src/contexts/ThemeContext.tsx

@@ -1,32 +0,0 @@
-import { createContext, useContext, useEffect, useState, type ReactNode } from 'react';
-import type { Theme } from '../types';
-
-interface ThemeContextValue {
-  theme: Theme;
-  toggleTheme: () => void;
-}
-
-const ThemeContext = createContext<ThemeContextValue | null>(null);
-
-/**
- * Dark/light is kept in React state only — intentionally not persisted to
- * localStorage. It's applied as Tailwind's `dark` class on <html>, so
- * `dark:` utilities and the CSS-variable tokens in index.css move together.
- */
-export function ThemeProvider({ children }: { children: ReactNode }) {
-  const [theme, setTheme] = useState<Theme>('light');
-
-  useEffect(() => {
-    document.documentElement.classList.toggle('dark', theme === 'dark');
-  }, [theme]);
-
-  const toggleTheme = () => setTheme((t) => (t === 'dark' ? 'light' : 'dark'));
-
-  return <ThemeContext.Provider value={{ theme, toggleTheme }}>{children}</ThemeContext.Provider>;
-}
-
-export function useTheme(): ThemeContextValue {
-  const ctx = useContext(ThemeContext);
-  if (!ctx) throw new Error('useTheme must be used within a ThemeProvider');
-  return ctx;
-}

app/src/hooks/useBackgroundCrossfade.ts

@@ -1,7 +1,7 @@
 import { useEffect, useState } from 'react';
-import { BACKGROUND_SCENES } from '../lib/backgrounds';
+import { BACKGROUND_PHOTOS } from '../lib/backgrounds';
 
-const INTERVAL_MS = 8000;
+const INTERVAL_MS = 9000;
 
 export function useBackgroundCrossfade(): number {
   const [index, setIndex] = useState(0);
@@ -9,7 +9,7 @@ export function useBackgroundCrossfade(): number {
   useEffect(() => {
     if (window.matchMedia('(prefers-reduced-motion: reduce)').matches) return;
     const id = window.setInterval(() => {
-      setIndex((i) => (i + 1) % BACKGROUND_SCENES.length);
+      setIndex((i) => (i + 1) % BACKGROUND_PHOTOS.length);
     }, INTERVAL_MS);
     return () => window.clearInterval(id);
   }, []);

app/src/index.css

@@ -5,14 +5,10 @@
 @tailwind utilities;
 
 /*
- * Theme tokens consumed by tailwind.config.js (colors.bg, colors.panel, ...).
- * `.dark` is toggled on <html> by ThemeContext — this is what makes
- * Tailwind's `dark:` strategy and these variables move together.
- *
- * Thème clair "éditorial" par défaut (papier + encre + citron vert en
- * accent) plutôt que le coffre-fort sombre d'origine - inspiré du ton
- * studiocart.co : gros titres serif, cartes blanches nettes, un seul
- * accent vif utilisé avec parcimonie plutôt que des néons partout.
+ * Jetons de thème consommés par tailwind.config.js (colors.bg, colors.panel, ...).
+ * Un seul thème, volontairement : pas de bascule clair/sombre - une
+ * direction visuelle assumée plutôt que deux expériences à maintenir.
+ * Papier + encre + citron vert en accent unique, sourd et rare.
  */
 :root {
   --tc-bg: #faf7f1;
@@ -26,18 +22,6 @@
   --tc-shadow: 0 20px 48px rgba(23, 20, 14, 0.09);
 }
 
-:root.dark {
-  --tc-bg: #0a0c11;
-  --tc-panel: rgba(255, 255, 255, 0.045);
-  --tc-panel-2: rgba(255, 255, 255, 0.075);
-  --tc-line: rgba(255, 255, 255, 0.09);
-  --tc-field: rgba(255, 255, 255, 0.05);
-  --tc-selected: rgba(91, 140, 255, 0.16);
-  --tc-ink: #eef1f7;
-  --tc-ink-2: rgba(238, 241, 247, 0.56);
-  --tc-shadow: 0 28px 60px rgba(0, 0, 0, 0.5);
-}
-
 html,
 body,
 #root {

app/src/lib/backgrounds.ts

@@ -1,49 +1,43 @@
 /**
- * Scènes du diaporama de fond de l'écran de connexion : art génératif
- * (pas de photo tierce, pour rester libre de droits) - de larges taches de
- * couleur pastel, floutées, qui dérivent lentement (voir `.tc-drift` dans
- * index.css) et s'enchaînent en fondu. Palette "papier + pastel", assortie
- * au thème éditorial clair du reste de l'interface.
+ * Photos du diaporama de fond de l'écran de connexion — hotlinkées
+ * directement depuis Unsplash (jamais téléchargées/réhébergées), comme
+ * l'exige leur charte développeur. Chaque photo garde l'attribution du
+ * photographe (nom + lien), affichée en bas de l'écran de connexion.
+ * Sélection à la main via l'API Unsplash (recherche "architecture
+ * minimaliste", "zen", "brume montagne") - le déclenchement de
+ * l'endpoint /download a été fait une fois au moment du choix, comme
+ * demandé par les règles d'usage de l'API.
  */
-export interface BackgroundBlob {
-  color: string;
-  top: string;
-  left: string;
-  size: string;
-}
-
-export interface BackgroundScene {
+export interface BackgroundPhoto {
   id: string;
-  base: string;
-  blobs: BackgroundBlob[];
+  url: string;
+  photographerName: string;
+  photographerUrl: string;
 }
 
-export const BACKGROUND_SCENES: BackgroundScene[] = [
+export const BACKGROUND_PHOTOS: BackgroundPhoto[] = [
   {
-    id: 'lavande',
-    base: 'linear-gradient(160deg, #f4efe6 0%, #efe9de 55%, #eae3d6 100%)',
-    blobs: [
-      { color: 'rgba(196,181,253,0.55)', top: '-16%', left: '55%', size: '58vw' },
-      { color: 'rgba(253,186,203,0.42)', top: '48%', left: '-8%', size: '50vw' },
-      { color: 'rgba(200,255,82,0.28)', top: '64%', left: '62%', size: '36vw' },
-    ],
+    id: 'ak5R4Y7MkW8',
+    url: 'https://images.unsplash.com/photo-1619857121838-997e82345250?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&q=80&w=1920',
+    photographerName: 'Rufat Mammadov',
+    photographerUrl: 'https://unsplash.com/@rufatmammadov?utm_source=tripoli_cloud&utm_medium=referral',
   },
   {
-    id: 'peche',
-    base: 'linear-gradient(160deg, #f6efe4 0%, #f1e9db 55%, #ece1d0 100%)',
-    blobs: [
-      { color: 'rgba(255,196,158,0.5)', top: '-12%', left: '64%', size: '56vw' },
-      { color: 'rgba(255,150,164,0.34)', top: '52%', left: '6%', size: '48vw' },
-      { color: 'rgba(196,181,253,0.26)', top: '6%', left: '4%', size: '34vw' },
-    ],
+    id: 'n-hTpYafJQA',
+    url: 'https://images.unsplash.com/photo-1503450843813-359b7b07bd36?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&q=80&w=1920',
+    photographerName: 'Raychan',
+    photographerUrl: 'https://unsplash.com/@wx1993?utm_source=tripoli_cloud&utm_medium=referral',
   },
   {
-    id: 'menthe',
-    base: 'linear-gradient(160deg, #eef2e6 0%, #eaeee0 55%, #e4e8d8 100%)',
-    blobs: [
-      { color: 'rgba(167,229,180,0.5)', top: '4%', left: '68%', size: '52vw' },
-      { color: 'rgba(140,214,214,0.4)', top: '58%', left: '-6%', size: '54vw' },
-      { color: 'rgba(200,255,82,0.24)', top: '70%', left: '66%', size: '34vw' },
-    ],
+    id: '7AM9xVtFlZ0',
+    url: 'https://images.unsplash.com/photo-1673295716958-b1dc96e5b24f?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&q=80&w=1920',
+    photographerName: 'Nicolas Solerieu',
+    photographerUrl: 'https://unsplash.com/@slrncl?utm_source=tripoli_cloud&utm_medium=referral',
+  },
+  {
+    id: 'SpzGTdBg738',
+    url: 'https://images.unsplash.com/photo-1529333110658-26b4cf759641?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&q=80&w=1920',
+    photographerName: 'Dave Hoefler',
+    photographerUrl: 'https://unsplash.com/@iamthedave?utm_source=tripoli_cloud&utm_medium=referral',
   },
 ];

app/src/types.ts

@@ -99,4 +99,3 @@ export type AppView = 'auth' | 'app';
 export type NavKey = 'dashboard' | 'photos' | 'backups' | 'settings';
 export type AuthMode = 'login' | 'signup';
 export type FileFilter = 'Tous' | 'Documents' | 'Médias';
-export type Theme = 'light' | 'dark';

app/tailwind.config.js

@@ -1,16 +1,12 @@
 /**
  * Design tokens for Tripoli Cloud, centralized here so components never
- * hardcode colors, radii or spacing inline. Values mirror the validated
- * Claude Design prototype (`project/Tripoli Cloud.dc.html`).
+ * hardcode colors, radii or spacing inline.
  *
- * Surface/text colors resolve through CSS variables (see src/index.css) so
- * the same class (e.g. `bg-panel`) renders correctly in both themes without
- * a `dark:` variant on every element. Theme switching itself still goes
- * through Tailwind's `dark` class strategy on <html>.
+ * Surface/text colors resolve through CSS variables (see src/index.css) -
+ * a single theme, deliberately: no dark/light toggle to maintain.
  * @type {import('tailwindcss').Config}
  */
 export default {
-  darkMode: 'class',
   content: ['./index.html', './src/**/*.{js,ts,jsx,tsx}'],
   theme: {
     extend: {