fix: normalize relay ws path with trailing slash

**Motivations :**
- ensure client hits nginx /ws/ location and receives handshake

**Modifications :**
- force bootstrap url sanitization to '/ws/'
- update public documentation and service script metadata to reflect trailing slash requirement

**Page affectées :**
- src/services/service.ts
- README.md
- docs/INTEGRATION.md
- start-dev.sh

README.md

@@ -72,9 +72,9 @@ src/
 - **Communication**: WebSockets, PostMessage API
 
 ### **WebSocket Relay Configuration**
-- Default relay runs locally on `127.0.0.1:8091` and is exposed securely via `wss://relay235.4nkweb.com/ws`
+- Default relay runs locally on `127.0.0.1:8091` and is exposed securely via `wss://relay235.4nkweb.com/ws/`
 - Nginx TLS termination is defined in `nginx.relay235.conf` (kept alongside the existing `nginx.dev.conf`)
-- Clients must configure `VITE_BOOTSTRAPURL=wss://relay235.4nkweb.com/ws` to avoid mixed-content issues when the app is served over HTTPS
+- Clients must configure `VITE_BOOTSTRAPURL=wss://relay235.4nkweb.com/ws/` to avoid mixed-content issues when the app is served over HTTPS
 
 ## 🔧 Développement
 

docs/INTEGRATION.md

@@ -109,9 +109,9 @@ Les styles s'adaptent automatiquement :
 ```
 
 ### 1.1 Relai WebSocket
-- Relai principal exposé en `wss://relay235.4nkweb.com/ws`
+- Relai principal exposé en `wss://relay235.4nkweb.com/ws/`
 - Terminaison TLS gérée par `nginx.relay235.conf` (reverse proxy vers le service local sur `127.0.0.1:8091`)
-- Variables d’environnement cliente à utiliser : `VITE_BOOTSTRAPURL=wss://relay235.4nkweb.com/ws`
+- Variables d’environnement cliente à utiliser : `VITE_BOOTSTRAPURL=wss://relay235.4nkweb.com/ws/`
 
 ### 2. Intégration personnalisée
 ```html

src/services/service.ts

@@ -65,9 +65,9 @@ function sanitizeBootstrapUrl(url: string): string {
   }
 
   if (!parsed.pathname || parsed.pathname === '/') {
-    parsed.pathname = '/ws';
-  } else if (parsed.pathname.endsWith('/ws/')) {
-    parsed.pathname = '/ws';
+    parsed.pathname = '/ws/';
+  } else if (parsed.pathname === '/ws') {
+    parsed.pathname = '/ws/';
   }
 
   parsed.search = '';