Improve session handling and sign-out in layout.liquid

Enhanced the signOut method to include error handling and set Content-Type header. Updated getSession to prevent caching by adding a timestamp and cache-control headers. Also fixed the npm dev script to use the correct command.

Author: hotlong

package.json

@@ -6,7 +6,7 @@
     "examples/*"
   ],
   "scripts": {
-    "dev": "npm run start:dev --workspace=@objectql/server",
+    "dev": "npm run dev --workspace=@objectql/server",
     "start": "npm run start --workspace=@objectql/server",
     "build": "tsc -b && npm run build --workspaces",
     "test": "npm run test --workspaces",

packages/server/src/views/layout.liquid

@@ -146,11 +146,25 @@
                 return res.json();
             },
             async signOut() {
-                await fetch(`${this.baseUrl}/sign-out`, { method: 'POST' });
+                try {
+                    await fetch(`${this.baseUrl}/sign-out`, { 
+                        method: 'POST',
+                        headers: {
+                            'Content-Type': 'application/json'
+                        }
+                    });
+                } catch (e) {
+                    console.error("Sign out error:", e);
+                }
                 window.location.href = '/login';
             },
             async getSession() {
-                const res = await fetch(`${this.baseUrl}/get-session`);
+                const res = await fetch(`${this.baseUrl}/get-session?_t=${Date.now()}`, {
+                    headers: {
+                        'Cache-Control': 'no-store, no-cache, must-revalidate',
+                        'Pragma': 'no-cache'
+                    }
+                });
                 if (!res.ok) return null;
                 return res.json();
             }