fix: remove medium theme, fix navbar re-render, fix Node.js env loading

- Remove 'medium' theme from dashboard and marketplace; keep only light/dark
- Marketplace: move public pages into (public)/ route group so header/footer
  persist across navigations without re-rendering (eliminates usePathname)
- MarketplaceShell is now a pure context provider; chrome lives in
  (public)/layout.tsx which Next.js holds stable across navigations
- WorkspaceFrame: remove history.replaceState and standalone-route logic
- Docker API: bypass npm run dev to avoid node --env-file in containers
- Add scripts/run-with-env-file.cjs for Node.js < 20.6 compatibility;
  update apps/api/package.json dev script to use it

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/dashboard/src/components/I18nProvider.tsx

@@ -5,7 +5,7 @@ import { SHARED_LANGUAGE_COOKIE, SHARED_LANGUAGE_KEY, SHARED_THEME_KEY, readCurr
 import { apiFetch } from '@/lib/api'
 
 export type DashboardLanguage = 'en' | 'fr' | 'ar'
-export type DashboardTheme = 'light' | 'medium' | 'dark'
+export type DashboardTheme = 'light' | 'dark'
 
 type FleetDict = {
   statusLabels: Record<'AVAILABLE' | 'RENTED' | 'MAINTENANCE' | 'OUT_OF_SERVICE', string>
@@ -297,7 +297,6 @@ type DashboardDictionary = {
   language: string
   theme: string
   light: string
-  medium: string
   dark: string
   fleet: FleetDict
   vehicleDetail: VehicleDetailDict
@@ -348,7 +347,6 @@ const dictionaries: Record<DashboardLanguage, DashboardDictionary> = {
     language: 'Language',
     theme: 'Theme',
     light: 'Light',
-    medium: 'Medium',
     dark: 'Dark',
     fleet: {
       statusLabels: { AVAILABLE: 'Available', RENTED: 'Rented', MAINTENANCE: 'Maintenance', OUT_OF_SERVICE: 'Out of Service' },
@@ -692,7 +690,6 @@ const dictionaries: Record<DashboardLanguage, DashboardDictionary> = {
     language: 'Langue',
     theme: 'Mode',
     light: 'Clair',
-    medium: 'Moyen',
     dark: 'Sombre',
     fleet: {
       statusLabels: { AVAILABLE: 'Disponible', RENTED: 'Loué', MAINTENANCE: 'Maintenance', OUT_OF_SERVICE: 'Hors service' },
@@ -1036,7 +1033,6 @@ const dictionaries: Record<DashboardLanguage, DashboardDictionary> = {
     language: 'اللغة',
     theme: 'الوضع',
     light: 'فاتح',
-    medium: 'متوسط',
     dark: 'داكن',
     fleet: {
       statusLabels: { AVAILABLE: 'متاح', RENTED: 'مؤجر', MAINTENANCE: 'صيانة', OUT_OF_SERVICE: 'خارج الخدمة' },
@@ -1421,7 +1417,7 @@ export function DashboardI18nProvider({
 
   useEffect(() => {
     const storedTheme = readScopedPreference(SHARED_THEME_KEY, ['dashboard-theme'])
-    if (storedTheme === 'light' || storedTheme === 'medium' || storedTheme === 'dark') {
+    if (storedTheme === 'light' || storedTheme === 'dark') {
       if (storedTheme !== theme) setThemeState(storedTheme)
       return
     }
@@ -1474,7 +1470,7 @@ export function DashboardI18nProvider({
         writeScopedPreference(SHARED_LANGUAGE_KEY, langToWrite, [DASHBOARD_LANGUAGE_KEY])
       }
 
-      if (scopedTheme === 'light' || scopedTheme === 'medium' || scopedTheme === 'dark') {
+      if (scopedTheme === 'light' || scopedTheme === 'dark') {
         if (scopedTheme !== theme) setThemeState(scopedTheme)
       } else {
         writeScopedPreference(SHARED_THEME_KEY, theme, ['dashboard-theme'])
@@ -1557,7 +1553,7 @@ export function DashboardThemeSwitcher() {
       <span className="px-2 text-[11px] font-semibold uppercase tracking-[0.16em] text-slate-500 dark:text-slate-400">
         {dict.theme}
       </span>
-      {(['light', 'medium', 'dark'] as DashboardTheme[]).map((value) => {
+      {(['light', 'dark'] as DashboardTheme[]).map((value) => {
         const active = value === theme
         return (
           <button
@@ -1570,7 +1566,7 @@ export function DashboardThemeSwitcher() {
                 : 'text-slate-600 hover:bg-slate-100 dark:text-slate-300 dark:hover:bg-slate-800'
             }`}
           >
-            {value === 'light' ? dict.light : value === 'medium' ? dict.medium : dict.dark}
+            {value === 'light' ? dict.light : dict.dark}
           </button>
         )
       })}