diff --git a/.env.example b/.env.example
index ecfe735e..dcc294ba 100644
--- a/.env.example
+++ b/.env.example
@@ -173,6 +173,8 @@ CRON_SECRET=""
 # Get your keys from: https://posthog.com
 NEXT_PUBLIC_POSTHOG_KEY=""
 NEXT_PUBLIC_POSTHOG_HOST="https://eu.i.posthog.com"
+# Optional override; Docker builds generate one automatically when omitted
+NEXT_PUBLIC_APP_VERSION=""
 
 # -----------------------------------------
 # Umami Analytics (Required)
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index fb8addd9..b93964ee 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -51,6 +51,8 @@ jobs:
           platforms: linux/amd64
           load: true
           tags: louez-web:smoke
+          build-args: |
+            NEXT_PUBLIC_APP_VERSION=${{ github.sha }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
 
@@ -175,5 +177,7 @@ jobs:
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            NEXT_PUBLIC_APP_VERSION=${{ github.sha }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
diff --git a/apps/web/.env.example b/apps/web/.env.example
index 975161fa..50078eba 100644
--- a/apps/web/.env.example
+++ b/apps/web/.env.example
@@ -146,6 +146,8 @@ CRON_SECRET=""
 # Get your keys from: https://posthog.com
 NEXT_PUBLIC_POSTHOG_KEY=""
 NEXT_PUBLIC_POSTHOG_HOST="https://eu.i.posthog.com"
+# Optional override; Docker builds generate one automatically when omitted
+NEXT_PUBLIC_APP_VERSION=""
 
 # -----------------------------------------
 # Umami Analytics (Required)
diff --git a/apps/web/app/(storefront)/[slug]/rental/rental-content.tsx b/apps/web/app/(storefront)/[slug]/rental/rental-content.tsx
index 2e136ac9..17b9b044 100644
--- a/apps/web/app/(storefront)/[slug]/rental/rental-content.tsx
+++ b/apps/web/app/(storefront)/[slug]/rental/rental-content.tsx
@@ -46,6 +46,7 @@ import {
 } from "@/lib/utils/duration";
 
 import { useStorefrontUrl } from "@/hooks/use-storefront-url";
+import { useBrowserTimezoneCity } from "@/hooks/use-browser-timezone-city";
 
 import { useCart } from "@/contexts/cart-context";
 
@@ -208,15 +209,7 @@ export function RentalContent({
     [endDate, storeTimezone],
   );
 
-  // Detect if user's browser timezone differs from the store's timezone
-  const timezoneCity = useMemo(() => {
-    if (!storeTimezone) return null;
-    const browserTimezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
-    if (browserTimezone === storeTimezone) return null;
-    // Extract city name from IANA timezone (e.g., "Europe/Paris" → "Paris")
-    const city = storeTimezone.split("/").pop()?.replace(/_/g, " ");
-    return city || storeTimezone;
-  }, [storeTimezone]);
+  const timezoneCity = useBrowserTimezoneCity(storeTimezone);
 
   // Set global dates in cart context
   useEffect(() => {
diff --git a/apps/web/components/storefront/date-selection-hero.tsx b/apps/web/components/storefront/date-selection-hero.tsx
index bdff6a70..4f57c73f 100644
--- a/apps/web/components/storefront/date-selection-hero.tsx
+++ b/apps/web/components/storefront/date-selection-hero.tsx
@@ -14,6 +14,7 @@ import { Popover, PopoverContent, PopoverTrigger } from "@louez/ui";
 import { ScrollArea } from "@louez/ui";
 import { cn } from "@louez/utils";
 import { useCart } from "@/contexts/cart-context";
+import { useBrowserTimezoneCity } from "@/hooks/use-browser-timezone-city";
 import { useStorefrontUrl } from "@/hooks/use-storefront-url";
 import { getMinStartDate, isTimeSlotAvailable, type PricingMode } from "@/lib/utils/duration";
 import { isCalendarDateBeforeSelectedDate } from "@/components/storefront/date-picker/core/use-rental-date-core";
@@ -332,13 +333,7 @@ export function DateSelectionHero({
     return `${days} ${days > 1 ? t("durationDays") : t("durationDay")} ${t("and")} ${hours}h`;
   };
 
-  const timezoneCity = useMemo(() => {
-    if (!timezone) return null;
-    const browserTimezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
-    if (browserTimezone === timezone) return null;
-    const city = timezone.split("/").pop()?.replace(/_/g, " ");
-    return city || timezone;
-  }, [timezone]);
+  const timezoneCity = useBrowserTimezoneCity(timezone);
 
   // Check if we can submit - always require times
   const canSubmit = startDate && endDate && startTime && endTime;
diff --git a/apps/web/components/storefront/embed-date-picker.tsx b/apps/web/components/storefront/embed-date-picker.tsx
index 66e7ed6f..8fe843f1 100644
--- a/apps/web/components/storefront/embed-date-picker.tsx
+++ b/apps/web/components/storefront/embed-date-picker.tsx
@@ -31,6 +31,7 @@ import {
   isCalendarDateBeforeSelectedDate,
   useRentalDateCore,
 } from '@/components/storefront/date-picker/core/use-rental-date-core'
+import { useBrowserTimezoneCity } from '@/hooks/use-browser-timezone-city'
 
 // ─── Types ────────────────────────────────────────────────────────────────────
 
@@ -344,13 +345,7 @@ export function EmbedDatePicker({
     tEmbed,
   ])
 
-  const timezoneCity = useMemo(() => {
-    if (!timezone) return null
-    const browserTimezone = Intl.DateTimeFormat().resolvedOptions().timeZone
-    if (browserTimezone === timezone) return null
-    const city = timezone.split('/').pop()?.replace(/_/g, ' ')
-    return city || timezone
-  }, [timezone])
+  const timezoneCity = useBrowserTimezoneCity(timezone)
 
   const handleSubmit = () => {
     if (validationError) {
diff --git a/apps/web/components/storefront/hero-date-picker.tsx b/apps/web/components/storefront/hero-date-picker.tsx
index 55287b2f..bba22fd6 100644
--- a/apps/web/components/storefront/hero-date-picker.tsx
+++ b/apps/web/components/storefront/hero-date-picker.tsx
@@ -13,6 +13,7 @@ import { Popover, PopoverContent, PopoverTrigger } from "@louez/ui";
 import { ScrollArea } from "@louez/ui";
 import { cn } from "@louez/utils";
 import { useCart } from "@/contexts/cart-context";
+import { useBrowserTimezoneCity } from "@/hooks/use-browser-timezone-city";
 import { useStorefrontUrl } from "@/hooks/use-storefront-url";
 import { type PricingMode } from "@/lib/utils/duration";
 import {
@@ -267,13 +268,7 @@ export function HeroDatePicker({
     return true;
   }, [startDate, endDate, startTime, endTime, isSameDay, minRentalMinutes, timezone]);
 
-  const timezoneCity = useMemo(() => {
-    if (!timezone) return null;
-    const browserTimezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
-    if (browserTimezone === timezone) return null;
-    const city = timezone.split("/").pop()?.replace(/_/g, " ");
-    return city || timezone;
-  }, [timezone]);
+  const timezoneCity = useBrowserTimezoneCity(timezone);
 
   const durationWarning = useMemo(() => {
     if (!startDate || !endDate || !startTime || !endTime) return null;
diff --git a/apps/web/env.ts b/apps/web/env.ts
index 12dcd747..8dcb7c84 100644
--- a/apps/web/env.ts
+++ b/apps/web/env.ts
@@ -234,6 +234,7 @@ export const env = createEnv({
       .string()
       .min(1, 'NEXT_PUBLIC_POSTHOG_KEY is required'),
     NEXT_PUBLIC_POSTHOG_HOST: z.url().default('https://eu.i.posthog.com'),
+    NEXT_PUBLIC_APP_VERSION: z.string().min(1).max(100).optional(),
 
     // ===== Umami Analytics (Required) =====
     NEXT_PUBLIC_UMAMI_SCRIPT_URL: z
@@ -324,6 +325,7 @@ export const env = createEnv({
     NEXT_PUBLIC_VAPID_PUBLIC_KEY: process.env.NEXT_PUBLIC_VAPID_PUBLIC_KEY,
     NEXT_PUBLIC_POSTHOG_KEY: process.env.NEXT_PUBLIC_POSTHOG_KEY,
     NEXT_PUBLIC_POSTHOG_HOST: process.env.NEXT_PUBLIC_POSTHOG_HOST,
+    NEXT_PUBLIC_APP_VERSION: process.env.NEXT_PUBLIC_APP_VERSION,
     NEXT_PUBLIC_UMAMI_SCRIPT_URL: process.env.NEXT_PUBLIC_UMAMI_SCRIPT_URL,
     NEXT_PUBLIC_UMAMI_WEBSITE_ID: process.env.NEXT_PUBLIC_UMAMI_WEBSITE_ID,
     NEXT_PUBLIC_GLEAP_API_KEY: process.env.NEXT_PUBLIC_GLEAP_API_KEY,
diff --git a/apps/web/hooks/use-browser-timezone-city.ts b/apps/web/hooks/use-browser-timezone-city.ts
new file mode 100644
index 00000000..7d6274e8
--- /dev/null
+++ b/apps/web/hooks/use-browser-timezone-city.ts
@@ -0,0 +1,25 @@
+"use client";
+
+import { useEffect, useState } from "react";
+
+export function useBrowserTimezoneCity(timezone?: string): string | null {
+  const [timezoneCity, setTimezoneCity] = useState<string | null>(null);
+
+  useEffect(() => {
+    if (!timezone) {
+      setTimezoneCity(null);
+      return;
+    }
+
+    const browserTimezone = Intl.DateTimeFormat().resolvedOptions().timeZone;
+
+    if (browserTimezone === timezone) {
+      setTimezoneCity(null);
+      return;
+    }
+
+    setTimezoneCity(timezone.split("/").pop()?.replace(/_/g, " ") || timezone);
+  }, [timezone]);
+
+  return timezoneCity;
+}
diff --git a/apps/web/instrumentation-client.ts b/apps/web/instrumentation-client.ts
index 7dc300ba..a6aa351d 100644
--- a/apps/web/instrumentation-client.ts
+++ b/apps/web/instrumentation-client.ts
@@ -17,9 +17,11 @@
 
 import posthog from 'posthog-js'
 
+import { env } from '@/env'
+
 function resolveSurface(): { isDashboard: boolean; storeSlug: string | null } {
   const hostname = window.location.hostname.toLowerCase()
-  const baseDomain = (process.env.NEXT_PUBLIC_APP_DOMAIN || 'localhost:3000')
+  const baseDomain = (env.NEXT_PUBLIC_APP_DOMAIN || 'localhost:3000')
     .split(':')[0]
     .toLowerCase()
 
@@ -45,10 +47,10 @@ function resolveSurface(): { isDashboard: boolean; storeSlug: string | null } {
   return { isDashboard: false, storeSlug: null }
 }
 
-if (typeof window !== 'undefined' && process.env.NEXT_PUBLIC_POSTHOG_KEY) {
+if (typeof window !== 'undefined' && env.NEXT_PUBLIC_POSTHOG_KEY) {
   const { isDashboard, storeSlug } = resolveSurface()
 
-  posthog.init(process.env.NEXT_PUBLIC_POSTHOG_KEY, {
+  posthog.init(env.NEXT_PUBLIC_POSTHOG_KEY, {
     // Route analytics through our reverse proxy to avoid CORS and ad blockers
     // The proxy is configured in next.config.ts rewrites
     api_host: '/ingest',
@@ -95,6 +97,9 @@ if (typeof window !== 'undefined' && process.env.NEXT_PUBLIC_POSTHOG_KEY) {
   posthog.register({
     surface: isDashboard ? 'dashboard' : storeSlug ? 'storefront' : 'marketing',
     ...(storeSlug ? { store_slug: storeSlug } : {}),
+    ...(env.NEXT_PUBLIC_APP_VERSION
+      ? { $app_version: env.NEXT_PUBLIC_APP_VERSION }
+      : {}),
   })
 }
 
diff --git a/docker/Dockerfile.web b/docker/Dockerfile.web
index 65212ed6..b33bbd2d 100644
--- a/docker/Dockerfile.web
+++ b/docker/Dockerfile.web
@@ -68,6 +68,7 @@ ARG DATABASE_URL
 ARG NEXT_PUBLIC_APP_URL
 ARG NEXT_PUBLIC_APP_DOMAIN
 ARG NEXT_PUBLIC_DASHBOARD_SUBDOMAIN
+ARG NEXT_PUBLIC_APP_VERSION
 ARG NEXT_PUBLIC_STRIPE_PUBLISHABLE_KEY
 ARG NEXT_PUBLIC_POSTHOG_KEY
 ARG NEXT_PUBLIC_POSTHOG_HOST
@@ -114,8 +115,11 @@ ENV NEXT_PUBLIC_FROMHELLO_API_URL=${NEXT_PUBLIC_FROMHELLO_API_URL}
 ENV NEXT_PUBLIC_FROMHELLO_KEY=${NEXT_PUBLIC_FROMHELLO_KEY}
 ENV NEXT_PUBLIC_FROMHELLO_COOKIE_DOMAIN=${NEXT_PUBLIC_FROMHELLO_COOKIE_DOMAIN}
 
-# Build the application using Turborepo
-RUN corepack enable pnpm && pnpm turbo run build --filter=@louez/web --env-mode=loose
+# Build the application using Turborepo. CI supplies the commit SHA; direct
+# EasyPanel builds fall back to a unique build identifier without manual input.
+RUN corepack enable pnpm && \
+    APP_VERSION="${NEXT_PUBLIC_APP_VERSION:-build-$(date -u +%Y%m%d%H%M%S)}" && \
+    NEXT_PUBLIC_APP_VERSION="${APP_VERSION}" pnpm turbo run build --filter=@louez/web --env-mode=loose
 
 # -----------------------------------------------------------------------------
 # Stage 3: Migrator
diff --git a/docs/analytics/setup-review-2026-07.md b/docs/analytics/setup-review-2026-07.md
index 516f84a1..61c86991 100644
--- a/docs/analytics/setup-review-2026-07.md
+++ b/docs/analytics/setup-review-2026-07.md
@@ -27,6 +27,7 @@ Instrumentation code (`apps/web`) :
 - **Fix `/ingest` sur les storefronts** : `proxy.ts` reecrivait `/ingest/*` vers `/{slug}/ingest/*` sur les sous-domaines boutique, donc chaque appel posthog-js storefront finissait en 404. `/ingest` passe maintenant en pass-through comme `/api` — c'est la cause racine du "zero pageview storefront".
 - **Config storefront exemptee de consentement** (`instrumentation-client.ts`) : init host-aware. Dashboard (`app.{domaine}`) = config complete (cookies scoped au host via `cross_subdomain_cookie: false`, replay, autocapture). Storefronts (`{slug}.{domaine}`) et pages marketing = mesure d'audience exemptee CNIL : `persistence: memory` (aucun cookie/localStorage), events anonymes (`person_profiles: identified_only`), pas d'autocapture, pas de replay, pas de heatmaps, pas de dead clicks, pas de surveys. Super props `surface` (`storefront` | `marketing`) et `store_slug` enregistrees a chaque chargement. **Elargir une de ces options cote storefront = banniere de consentement obligatoire.**
 - **Surface dashboard explicite** (`instrumentation-client.ts`) : a partir du prochain deploy apres le 2026-07-03, les pageviews dashboard portent aussi `surface: dashboard`. Les pageviews dashboard historiques restent souvent `surface = unknown`.
+- **Version applicative sur les events client** (`instrumentation-client.ts`) : PostHog recoit `$app_version` sur les events client pour relier les exceptions a une version. Le workflow GitHub fournit le SHA exact du commit ; un build Docker direct (dont EasyPanel) genere automatiquement un identifiant `build-YYYYMMDDHHMMSS` si aucune version n'est fournie. `NEXT_PUBLIC_APP_VERSION` reste disponible comme override optionnel.
 
 ## Roadmap des manques (prioritee)