feat(sidebar): read LibreChat URL from LIBRECHAT_URL env var

Replace hardcoded localhost:3080 chat link with configurable
LIBRECHAT_URL environment variable, passed through AuthInfo to
the sidebar component.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/app_shell.rs

@@ -65,6 +65,7 @@ pub fn AppShell() -> Element {
                         email: info.email,
                         name: info.name,
                         avatar_url: info.avatar_url,
+                        librechat_url: info.librechat_url,
                         class: sidebar_cls,
                         on_nav: move |_| mobile_menu_open.set(false),
                     }

src/components/sidebar.rs

@@ -13,7 +13,7 @@ enum NavTarget {
     /// Internal Dioxus route (rendered as `Link { to: route }`).
     Internal(Route),
     /// External URL opened in a new tab (rendered as `<a href>`).
-    External(&'static str),
+    External(String),
 }
 
 /// Navigation entry for the sidebar.
@@ -43,6 +43,7 @@ pub fn Sidebar(
     name: String,
     email: String,
     avatar_url: String,
+    #[props(default = "http://localhost:3080".to_string())] librechat_url: String,
     #[props(default = "sidebar".to_string())] class: String,
     #[props(default)] on_nav: EventHandler<()>,
 ) -> Element {
@@ -66,7 +67,7 @@ pub fn Sidebar(
             key: "chat",
             label: t(locale_val, "nav.chat"),
             // Opens LibreChat in a new tab; SSO via shared Keycloak realm.
-            target: NavTarget::External("http://localhost:3080"),
+            target: NavTarget::External(librechat_url.clone()),
             icon: rsx! { Icon { icon: BsChatDots, width: 18, height: 18 } },
         },
         NavItem {
@@ -124,7 +125,7 @@ pub fn Sidebar(
                                 }
                             }
                             NavTarget::External(url) => {
-                                let url = *url;
+                                let url = url.clone();
                                 rsx! {
                                     a {
                                         href: url,

src/infrastructure/auth_check.rs

@@ -24,13 +24,18 @@ pub async fn check_auth() -> Result<AuthInfo, ServerFnError> {
         .map_err(|e| ServerFnError::new(format!("session read failed: {e}")))?;
 
     match user_state {
-        Some(u) => Ok(AuthInfo {
-            authenticated: true,
-            sub: u.sub,
-            email: u.user.email,
-            name: u.user.name,
-            avatar_url: u.user.avatar_url,
-        }),
+        Some(u) => {
+            let librechat_url = std::env::var("LIBRECHAT_URL")
+                .unwrap_or_else(|_| "http://localhost:3080".into());
+            Ok(AuthInfo {
+                authenticated: true,
+                sub: u.sub,
+                email: u.user.email,
+                name: u.user.name,
+                avatar_url: u.user.avatar_url,
+                librechat_url,
+            })
+        }
         None => Ok(AuthInfo::default()),
     }
 }

src/models/user.rs

@@ -22,6 +22,8 @@ pub struct AuthInfo {
     pub name: String,
     /// Avatar URL (from Keycloak picture claim)
     pub avatar_url: String,
+    /// LibreChat instance URL for the sidebar chat link
+    pub librechat_url: String,
 }
 
 /// Per-user LLM provider configuration stored in MongoDB.