feat(agent): let users choose model route

src/app/layout.tsx

@@ -104,6 +104,7 @@ export default async function RootLayout({ children }: { children: React.ReactNo
   let signedIn = false;
   let assistantEnabled = false;
   let assistantName = DEFAULT_ASSISTANT_NAME;
+  let assistantModelRoute: string | null = null;
   let assistantModel: string | null = null;
 
   const session = await auth();
@@ -118,6 +119,7 @@ export default async function RootLayout({ children }: { children: React.ReactNo
         themeNavStyle: users.themeNavStyle,
         assistantEnabled: users.assistantEnabled,
         assistantName: users.assistantName,
+        assistantModelRoute: users.assistantModelRoute,
         assistantModel: users.assistantModel,
       })
       .from(users)
@@ -131,6 +133,7 @@ export default async function RootLayout({ children }: { children: React.ReactNo
       navStyle = row.themeNavStyle as NavStyle;
       assistantEnabled = row.assistantEnabled;
       assistantName = row.assistantName?.trim() || DEFAULT_ASSISTANT_NAME;
+      assistantModelRoute = row.assistantModelRoute?.trim() || null;
       assistantModel = row.assistantModel?.trim() || null;
     }
     userDashboards = await db
@@ -189,6 +192,7 @@ export default async function RootLayout({ children }: { children: React.ReactNo
               configured={isLlmConfigured()}
               userId={session.user.id}
               assistantName={assistantName}
+              assistantModelRoute={assistantModelRoute}
               assistantModel={assistantModel}
             />
           ) : null}