diff --git a/control-plane/api/internal/profile/handler.go b/control-plane/api/internal/profile/handler.go
index e6a7880..02138c6 100644
--- a/control-plane/api/internal/profile/handler.go
+++ b/control-plane/api/internal/profile/handler.go
@@ -4,6 +4,7 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
+	"github.com/omnex/control-plane/api/internal/alerts"
 	"github.com/omnex/control-plane/api/internal/auth"
 )
 
@@ -173,3 +174,55 @@ func (h *Handler) SetAlerts(c *gin.Context) {
 	}
 	c.JSON(http.StatusOK, toAlertSettingsResponse(user))
 }
+
+type testChannelResult struct {
+	OK    bool   `json:"ok"`
+	Error string `json:"error,omitempty"`
+}
+
+type testAlertsResponse struct {
+	Discord  *testChannelResult `json:"discord,omitempty"`
+	Telegram *testChannelResult `json:"telegram,omitempty"`
+}
+
+const testAlertMessage = "🔔 Test Omnex — si vous recevez ce message, ce canal d'alerte est bien configuré."
+
+// TestAlerts : envoie un message de test aux canaux fournis dans la requête,
+// sans les persister — permet de vérifier la config (webhook Discord valide,
+// bot Telegram démarré, chat_id correct...) avant d'enregistrer, ou de
+// vérifier des réglages déjà enregistrés sans les ressaisir.
+func (h *Handler) TestAlerts(c *gin.Context) {
+	var req alertSettingsRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "requête invalide"})
+		return
+	}
+	p := auth.PrincipalFrom(c)
+	if p == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "non authentifié"})
+		return
+	}
+	if req.DiscordWebhookURL == "" && (req.TelegramBotToken == "" || req.TelegramChatID == "") {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "aucun canal renseigné"})
+		return
+	}
+
+	var res testAlertsResponse
+	if req.DiscordWebhookURL != "" {
+		n := &alerts.DiscordNotifier{WebhookURL: req.DiscordWebhookURL}
+		if err := n.Notify(c.Request.Context(), testAlertMessage); err != nil {
+			res.Discord = &testChannelResult{Error: err.Error()}
+		} else {
+			res.Discord = &testChannelResult{OK: true}
+		}
+	}
+	if req.TelegramBotToken != "" && req.TelegramChatID != "" {
+		n := &alerts.TelegramNotifier{BotToken: req.TelegramBotToken, ChatID: req.TelegramChatID}
+		if err := n.Notify(c.Request.Context(), testAlertMessage); err != nil {
+			res.Telegram = &testChannelResult{Error: err.Error()}
+		} else {
+			res.Telegram = &testChannelResult{OK: true}
+		}
+	}
+	c.JSON(http.StatusOK, res)
+}
diff --git a/control-plane/api/internal/router/router.go b/control-plane/api/internal/router/router.go
index e161dae..cdf028e 100644
--- a/control-plane/api/internal/router/router.go
+++ b/control-plane/api/internal/router/router.go
@@ -76,6 +76,7 @@ func New(d Deps) *gin.Engine {
 		admin.POST("/codes", d.SubH.CreateCodeForBuy)
 		admin.GET("/profile/alerts", d.ProfileH.GetAlerts)
 		admin.POST("/profile/alerts", d.ProfileH.SetAlerts)
+		admin.POST("/profile/alerts/test", d.ProfileH.TestAlerts)
 		if d.DemosH != nil {
 			admin.POST("/demos", d.DemosH.Create)
 			admin.GET("/demos", d.DemosH.List)
diff --git a/web/src/components/ConfirmDialog.test.tsx b/web/src/components/ConfirmDialog.test.tsx
deleted file mode 100644
index f79c510..0000000
--- a/web/src/components/ConfirmDialog.test.tsx
+++ /dev/null
@@ -1,42 +0,0 @@
-import { describe, expect, it, vi } from 'vitest'
-import { render, screen } from '@testing-library/react'
-import userEvent from '@testing-library/user-event'
-import { SaasProvider } from '@saas-ui/react'
-import { ConfirmDialog } from './ConfirmDialog'
-
-function renderDialog(props: Partial<React.ComponentProps<typeof ConfirmDialog>> = {}) {
-  const onConfirm = vi.fn()
-  const onClose = vi.fn()
-  render(
-    <SaasProvider>
-      <ConfirmDialog
-        isOpen
-        title="Détruire la démo ?"
-        confirmLabel="Détruire"
-        onConfirm={onConfirm}
-        onClose={onClose}
-        {...props}
-      />
-    </SaasProvider>,
-  )
-  return { onConfirm, onClose }
-}
-
-describe('ConfirmDialog', () => {
-  it('appelle onConfirm au clic sur le bouton de confirmation', async () => {
-    const { onConfirm } = renderDialog()
-    await userEvent.setup().click(screen.getByRole('button', { name: /détruire/i }))
-    expect(onConfirm).toHaveBeenCalledOnce()
-  })
-
-  it('appelle onClose au clic sur Annuler', async () => {
-    const { onClose } = renderDialog()
-    await userEvent.setup().click(screen.getByRole('button', { name: /annuler/i }))
-    expect(onClose).toHaveBeenCalledOnce()
-  })
-
-  it('ne rend pas le contenu quand il est fermé', () => {
-    renderDialog({ isOpen: false })
-    expect(screen.queryByRole('button', { name: /détruire/i })).not.toBeInTheDocument()
-  })
-})
diff --git a/web/src/components/ConfirmDialog.tsx b/web/src/components/ConfirmDialog.tsx
index cf56988..43ab5a3 100644
--- a/web/src/components/ConfirmDialog.tsx
+++ b/web/src/components/ConfirmDialog.tsx
@@ -49,7 +49,7 @@ export function ConfirmDialog({
           <AlertDialogHeader fontSize="lg" fontWeight="bold">
             {title}
           </AlertDialogHeader>
-          <AlertDialogBody color="gray.600">{children}</AlertDialogBody>
+          <AlertDialogBody>{children}</AlertDialogBody>
           <AlertDialogFooter gap={3}>
             <Button ref={cancelRef} onClick={onClose} variant="ghost" isDisabled={isLoading}>
               {cancelLabel}
diff --git a/web/src/lib/api.ts b/web/src/lib/api.ts
index f8d4d65..af126cd 100644
--- a/web/src/lib/api.ts
+++ b/web/src/lib/api.ts
@@ -147,6 +147,16 @@ export interface AlertSettings {
   telegram_chat_id: string
 }
 
+export interface AlertChannelResult {
+  ok: boolean
+  error?: string
+}
+
+export interface TestAlertSettingsResponse {
+  discord?: AlertChannelResult
+  telegram?: AlertChannelResult
+}
+
 export interface AppDownload {
   name: string
   size_bytes: number
@@ -232,6 +242,8 @@ export const api = {
   getAlertSettings: () => request<AlertSettings>('GET', '/profile/alerts'),
   setAlertSettings: (settings: AlertSettings) =>
     request<AlertSettings>('POST', '/profile/alerts', settings),
+  testAlertSettings: (settings: AlertSettings) =>
+    request<TestAlertSettingsResponse>('POST', '/profile/alerts/test', settings),
 
   listAppDownloads: () => request<AppDownloadsResponse>('GET', '/apps'),
 }
diff --git a/web/src/pages/Contact.tsx b/web/src/pages/Contact.tsx
new file mode 100644
index 0000000..73b8155
--- /dev/null
+++ b/web/src/pages/Contact.tsx
@@ -0,0 +1,28 @@
+import { Box, Button, Container, Heading, Stack, Text } from '@chakra-ui/react'
+
+export function Contact() {
+  return (
+    <Box>
+      <Box bgGradient="linear(to-b, blackAlpha.50, transparent)" py={{ base: 16, md: 24 }}>
+        <Container maxW="container.lg">
+          <Stack spacing={6} textAlign="center" align="center">
+            <Heading size="2xl">Contactez-nous</Heading>
+            <Text fontSize="xl" color="gray.600" maxW="2xl">
+              Une question ? Notre équipe vous répond directement sur Telegram.
+            </Text>
+            <Button
+              as="a"
+              href="https://t.me/OMNEX_CORP"
+              target="_blank"
+              rel="noopener noreferrer"
+              colorScheme="primary"
+              size="lg"
+            >
+              Nous contacter sur Telegram
+            </Button>
+          </Stack>
+        </Container>
+      </Box>
+    </Box>
+  )
+}
diff --git a/web/src/pages/backoffice/Demos.tsx b/web/src/pages/backoffice/Demos.tsx
index d6d7563..3f7fb84 100644
--- a/web/src/pages/backoffice/Demos.tsx
+++ b/web/src/pages/backoffice/Demos.tsx
@@ -46,6 +46,7 @@ export function Demos() {
   const [busy, setBusy] = useState<string | null>(null)
   const [toDelete, setToDelete] = useState<Demo | null>(null)
   const [toPremium, setToPremium] = useState<Demo | null>(null)
+  const [toExtend, setToExtend] = useState<Demo | null>(null)
   const [createModalOpen, setCreateModalOpen] = useState(false)
   const [editingDomain, setEditingDomain] = useState<Demo | null>(null)
 
@@ -75,11 +76,14 @@ export function Demos() {
     return () => clearInterval(id)
   }, [load])
 
-  const extend = async (d: Demo) => {
+  const confirmExtend = async () => {
+    if (!toExtend) return
+    const d = toExtend
     setBusy(d.id)
     try {
       await api.extendDemo(d.id)
       toast({ status: 'success', title: 'Démo prolongée de 30 jours' })
+      setToExtend(null)
       await load()
     } catch (err) {
       const msg = err instanceof ApiError ? err.message : 'Erreur'
@@ -176,7 +180,7 @@ export function Demos() {
         isDisabled={!isAlive(d.status) || busy === d.id}
         onClick={(e) => {
           e.stopPropagation()
-          extend(d)
+          setToExtend(d)
         }}
       >
         +30 j
@@ -354,6 +358,21 @@ export function Demos() {
         </>
       )}
 
+      <ConfirmDialog
+        isOpen={!!toExtend}
+        title="Prolonger la démo de 30 jours ?"
+        confirmLabel="Prolonger"
+        isLoading={!!toExtend && busy === toExtend.id}
+        onConfirm={confirmExtend}
+        onClose={() => setToExtend(null)}
+      >
+        La démo{' '}
+        <Text as="span" fontFamily="mono" fontWeight="semibold">
+          {toExtend?.namespace}
+        </Text>{' '}
+        verra sa date d'expiration repoussée de 30 jours.
+      </ConfirmDialog>
+
       <ConfirmDialog
         isOpen={!!toDelete}
         title="Détruire la démo ?"
diff --git a/web/src/pages/backoffice/Profile.tsx b/web/src/pages/backoffice/Profile.tsx
index 357a9e1..4169b69 100644
--- a/web/src/pages/backoffice/Profile.tsx
+++ b/web/src/pages/backoffice/Profile.tsx
@@ -116,6 +116,7 @@ export function Profile() {
   const [telegramBotToken, setTelegramBotToken] = useState('')
   const [telegramChatId, setTelegramChatId] = useState('')
   const [savingAlerts, setSavingAlerts] = useState(false)
+  const [testingAlerts, setTestingAlerts] = useState(false)
 
   useEffect(() => {
     let cancelled = false
@@ -172,6 +173,46 @@ export function Profile() {
     }
   }
 
+  const handleTestAlertSettings = async () => {
+    setTestingAlerts(true)
+    try {
+      const res = await api.testAlertSettings({
+        discord_webhook_url: discordWebhookUrl.trim(),
+        telegram_bot_token: telegramBotToken.trim(),
+        telegram_chat_id: telegramChatId.trim(),
+      })
+      const results = [
+        res.discord && { label: 'Discord', ...res.discord },
+        res.telegram && { label: 'Telegram', ...res.telegram },
+      ].filter((r): r is { label: string; ok: boolean; error?: string } => !!r)
+
+      if (results.every((r) => r.ok)) {
+        toast({ status: 'success', title: 'Notification de test envoyée', description: results.map((r) => r.label).join(' et ') })
+      } else {
+        toast({
+          status: 'error',
+          title: 'Échec du test',
+          description: results
+            .filter((r) => !r.ok)
+            .map((r) => `${r.label} : ${r.error}`)
+            .join(' — '),
+        })
+      }
+    } catch (err) {
+      if (err instanceof ApiError && err.status === 401) {
+        navigate('/login')
+        return
+      }
+      toast({
+        status: 'warning',
+        title: 'Test impossible',
+        description: err instanceof ApiError ? err.message : undefined,
+      })
+    } finally {
+      setTestingAlerts(false)
+    }
+  }
+
   const handleUpdateUsername = async (newUsername: string) => {
     const trimmed = newUsername.trim()
     if (!me || !trimmed || trimmed === me.username) return
@@ -469,7 +510,16 @@ export function Profile() {
                       </FormControl>
                     </SimpleGrid>
 
-                    <Flex justify="flex-end">
+                    <Flex justify="flex-end" gap={2}>
+                      <Button
+                        size="sm"
+                        variant="outline"
+                        isDisabled={!discordWebhookUrl.trim() && !(telegramBotToken.trim() && telegramChatId.trim())}
+                        isLoading={testingAlerts}
+                        onClick={handleTestAlertSettings}
+                      >
+                        Tester les notifications
+                      </Button>
                       <Button
                         size="sm"
                         colorScheme="primary"