admin: fix mobile sidebar menu inaccessible in portrait mode (#8556)

* admin: fix mobile sidebar menu inaccessible in portrait mode

The hamburger button only toggled the user dropdown, leaving the
sidebar navigation inaccessible on mobile devices in portrait mode.

Add a dedicated sidebar toggle button (visible only on mobile), give
the sidebar an id so Bootstrap collapse can target it, add a backdrop
overlay for the open state, and auto-close the sidebar when a nav
link is clicked.

Fixes #8550

* admin: address review feedback on mobile sidebar

- Remove redundant JS show/hide.bs.collapse listeners; CSS sibling
  selector already handles backdrop visibility
- Use const instead of var for non-reassigned variables
- Move inline style on user icon to CSS class

* admin: add aria attributes to user-menu toggler, use CSS variable for navbar height

- Add aria-controls, aria-expanded, and aria-label to the user-menu
  toggle button for assistive technology
- Extract hard-coded 56px navbar height into --navbar-height CSS
  custom property used by sidebar and backdrop positioning

* admin: extract hideSidebar helper, use toggler visibility for breakpoint check

- Extract duplicated collapse-hide logic into a hideSidebar helper
- Replace hardcoded window.innerWidth < 768 with a check on the
  sidebar toggler's computed display, decoupling JS from CSS breakpoints
- Add aria-expanded="false" to sidebar toggle button

---------

Co-authored-by: Copilot <copilot@github.com>

weed/admin/static/css/admin.css

@@ -1,5 +1,9 @@
 /* SeaweedFS Dashboard Custom Styles */
 
+:root {
+    --navbar-height: 56px;
+}
+
 /* Link colors - muted */
 a {
     color: #5b7c99;
@@ -12,7 +16,7 @@ a:hover {
 /* Sidebar Styles */
 .sidebar {
     position: fixed;
-    top: 56px;
+    top: var(--navbar-height);
     bottom: 0;
     left: 0;
     z-index: 100;
@@ -51,13 +55,32 @@ main {
 
 @media (max-width: 767.98px) {
     .sidebar {
-        top: 5rem;
+        top: var(--navbar-height);
+        padding-top: 0;
+        width: 240px;
+        background-color: #f8f9fa !important;
+        z-index: 1050;
+    }
+    .sidebar.show ~ .sidebar-backdrop {
+        display: block;
     }
     main {
         margin-left: 0;
     }
 }
 
+/* Sidebar backdrop for mobile overlay */
+.sidebar-backdrop {
+    display: none;
+    position: fixed;
+    top: var(--navbar-height);
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background-color: rgba(0, 0, 0, 0.5);
+    z-index: 1040;
+}
+
 /* Custom card styles */
 .border-left-primary {
     border-left: 0.25rem solid #6b8caf !important;
@@ -262,6 +285,11 @@ main {
     box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15) !important;
 }
 
+/* Navbar user icon color */
+.navbar-toggler .fa-user {
+    color: rgba(255, 255, 255, 0.75);
+}
+
 /* Collapsible menu styles */
 .nav-link[data-bs-toggle="collapse"] {
     position: relative;

weed/admin/static/js/admin.js

@@ -31,6 +31,9 @@ function initializeDashboard() {
 
     // Set up submenu behavior
     setupSubmenuBehavior();
+
+    // Set up mobile sidebar behavior
+    setupMobileSidebar();
 }
 
 // HTMX event listeners
@@ -194,6 +197,33 @@ function setupSubmenuBehavior() {
 
 }
 
+// Mobile sidebar toggle and backdrop behavior
+function setupMobileSidebar() {
+    const sidebar = document.getElementById('sidebarMenu');
+    const backdrop = document.getElementById('sidebarBackdrop');
+    if (!sidebar || !backdrop) return;
+
+    const hideSidebar = () => {
+        const bsCollapse = bootstrap.Collapse.getInstance(sidebar);
+        if (bsCollapse) {
+            bsCollapse.hide();
+        }
+    };
+
+    // Close sidebar when backdrop is clicked
+    backdrop.addEventListener('click', hideSidebar);
+
+    // Close sidebar when a nav link is clicked (on mobile)
+    const sidebarToggler = document.querySelector("button[data-bs-target='#sidebarMenu']");
+    sidebar.querySelectorAll('a.nav-link:not([data-bs-toggle="collapse"])').forEach(function (link) {
+        link.addEventListener('click', function () {
+            if (sidebarToggler && getComputedStyle(sidebarToggler).display !== 'none') {
+                hideSidebar();
+            }
+        });
+    });
+}
+
 // Loading indicator functions
 function showLoadingIndicator() {
     const indicator = document.getElementById('loading-indicator');

weed/admin/view/layout/layout.templ

@@ -60,9 +60,12 @@ templ Layout(view ViewContext, content templ.Component) {
                     SeaweedFS Admin
                 </a>
                 
-                <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav">
+                <button class="navbar-toggler d-md-none me-2" type="button" data-bs-toggle="collapse" data-bs-target="#sidebarMenu" aria-controls="sidebarMenu" aria-expanded="false" aria-label="Toggle navigation menu">
                     <span class="navbar-toggler-icon"></span>
                 </button>
+                <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="User menu">
+                    <i class="fas fa-user"></i>
+                </button>
                 
                 <div class="collapse navbar-collapse" id="navbarNav">
                     <ul class="navbar-nav ms-auto">
@@ -83,7 +86,7 @@ templ Layout(view ViewContext, content templ.Component) {
 
         <div class="row g-0">
             <!-- Sidebar -->
-            <div class="col-md-3 col-lg-2 d-md-block bg-light sidebar collapse">
+            <div class="col-md-3 col-lg-2 d-md-block bg-light sidebar collapse" id="sidebarMenu">
                 <div class="position-sticky pt-3">
                     <h6 class="sidebar-heading px-3 mt-4 mb-1 text-muted">
                         <span>MAIN</span>
@@ -309,6 +312,9 @@ templ Layout(view ViewContext, content templ.Component) {
                 </div>
             </div>
 
+            <!-- Sidebar backdrop for mobile -->
+            <div class="sidebar-backdrop" id="sidebarBackdrop"></div>
+
             <!-- Main content -->
             <main class="col-md-9 ms-sm-auto col-lg-10 px-3 px-md-4">
                 <div class="pt-3">

weed/admin/view/layout/layout_templ.go

@@ -65,26 +65,26 @@ func Layout(view ViewContext, content templ.Component) templ.Component {
 		var templ_7745c5c3_Var2 string
 		templ_7745c5c3_Var2, templ_7745c5c3_Err = templ.JoinStringErrs(csrfToken)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 41, Col: 47}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 41, Col: 47}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var2))
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 2, "\"><link rel=\"icon\" href=\"/static/favicon.ico\" type=\"image/x-icon\"><!-- Bootstrap CSS --><link href=\"/static/css/bootstrap.min.css\" rel=\"stylesheet\"><!-- Font Awesome CSS --><link href=\"/static/css/fontawesome.min.css\" rel=\"stylesheet\"><!-- HTMX --><script src=\"/static/js/htmx.min.js\"></script><!-- Custom CSS --><link rel=\"stylesheet\" href=\"/static/css/admin.css\"></head><body><div class=\"container-fluid p-0\"><!-- Header --><header class=\"navbar navbar-expand-lg navbar-dark bg-primary sticky-top\"><div class=\"container-fluid\"><a class=\"navbar-brand fw-bold\" href=\"/admin\"><i class=\"fas fa-server me-2\"></i> SeaweedFS Admin</a> <button class=\"navbar-toggler\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#navbarNav\"><span class=\"navbar-toggler-icon\"></span></button><div class=\"collapse navbar-collapse\" id=\"navbarNav\"><ul class=\"navbar-nav ms-auto\"><li class=\"nav-item dropdown\"><a class=\"nav-link dropdown-toggle\" href=\"#\" role=\"button\" data-bs-toggle=\"dropdown\"><i class=\"fas fa-user me-1\"></i>")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 2, "\"><link rel=\"icon\" href=\"/static/favicon.ico\" type=\"image/x-icon\"><!-- Bootstrap CSS --><link href=\"/static/css/bootstrap.min.css\" rel=\"stylesheet\"><!-- Font Awesome CSS --><link href=\"/static/css/fontawesome.min.css\" rel=\"stylesheet\"><!-- HTMX --><script src=\"/static/js/htmx.min.js\"></script><!-- Custom CSS --><link rel=\"stylesheet\" href=\"/static/css/admin.css\"></head><body><div class=\"container-fluid p-0\"><!-- Header --><header class=\"navbar navbar-expand-lg navbar-dark bg-primary sticky-top\"><div class=\"container-fluid\"><a class=\"navbar-brand fw-bold\" href=\"/admin\"><i class=\"fas fa-server me-2\"></i> SeaweedFS Admin</a> <button class=\"navbar-toggler d-md-none me-2\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#sidebarMenu\" aria-controls=\"sidebarMenu\" aria-expanded=\"false\" aria-label=\"Toggle navigation menu\"><span class=\"navbar-toggler-icon\"></span></button> <button class=\"navbar-toggler\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#navbarNav\" aria-controls=\"navbarNav\" aria-expanded=\"false\" aria-label=\"User menu\"><i class=\"fas fa-user\"></i></button><div class=\"collapse navbar-collapse\" id=\"navbarNav\"><ul class=\"navbar-nav ms-auto\"><li class=\"nav-item dropdown\"><a class=\"nav-link dropdown-toggle\" href=\"#\" role=\"button\" data-bs-toggle=\"dropdown\"><i class=\"fas fa-user me-1\"></i>")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
 		var templ_7745c5c3_Var3 string
 		templ_7745c5c3_Var3, templ_7745c5c3_Err = templ.JoinStringErrs(username)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 71, Col: 73}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 74, Col: 73}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var3))
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 3, "</a><ul class=\"dropdown-menu\"><li><a class=\"dropdown-item\" href=\"/logout\"><i class=\"fas fa-sign-out-alt me-2\"></i>Logout</a></li></ul></li></ul></div></div></header><div class=\"row g-0\"><!-- Sidebar --><div class=\"col-md-3 col-lg-2 d-md-block bg-light sidebar collapse\"><div class=\"position-sticky pt-3\"><h6 class=\"sidebar-heading px-3 mt-4 mb-1 text-muted\"><span>MAIN</span></h6><ul class=\"nav flex-column\"><li class=\"nav-item\"><a class=\"nav-link\" href=\"/admin\"><i class=\"fas fa-tachometer-alt me-2\"></i>Dashboard</a></li><li class=\"nav-item\">")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 3, "</a><ul class=\"dropdown-menu\"><li><a class=\"dropdown-item\" href=\"/logout\"><i class=\"fas fa-sign-out-alt me-2\"></i>Logout</a></li></ul></li></ul></div></div></header><div class=\"row g-0\"><!-- Sidebar --><div class=\"col-md-3 col-lg-2 d-md-block bg-light sidebar collapse\" id=\"sidebarMenu\"><div class=\"position-sticky pt-3\"><h6 class=\"sidebar-heading px-3 mt-4 mb-1 text-muted\"><span>MAIN</span></h6><ul class=\"nav flex-column\"><li class=\"nav-item\"><a class=\"nav-link\" href=\"/admin\"><i class=\"fas fa-tachometer-alt me-2\"></i>Dashboard</a></li><li class=\"nav-item\">")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
@@ -100,7 +100,7 @@ func Layout(view ViewContext, content templ.Component) templ.Component {
 		var templ_7745c5c3_Var5 string
 		templ_7745c5c3_Var5, templ_7745c5c3_Err = templ.JoinStringErrs(templ.CSSClasses(templ_7745c5c3_Var4).String())
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 1, Col: 0}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 1, Col: 0}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var5))
 		if templ_7745c5c3_Err != nil {
@@ -113,7 +113,7 @@ func Layout(view ViewContext, content templ.Component) templ.Component {
 		var templ_7745c5c3_Var6 string
 		templ_7745c5c3_Var6, templ_7745c5c3_Err = templ.JoinStringErrs(fmt.Sprintf("%t", isClusterPage))
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 98, Col: 207}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 101, Col: 207}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var6))
 		if templ_7745c5c3_Err != nil {
@@ -135,7 +135,7 @@ func Layout(view ViewContext, content templ.Component) templ.Component {
 		var templ_7745c5c3_Var8 string
 		templ_7745c5c3_Var8, templ_7745c5c3_Err = templ.JoinStringErrs(templ.CSSClasses(templ_7745c5c3_Var7).String())
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 1, Col: 0}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 1, Col: 0}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var8))
 		if templ_7745c5c3_Err != nil {
@@ -157,7 +157,7 @@ func Layout(view ViewContext, content templ.Component) templ.Component {
 		var templ_7745c5c3_Var10 string
 		templ_7745c5c3_Var10, templ_7745c5c3_Err = templ.JoinStringErrs(templ.CSSClasses(templ_7745c5c3_Var9).String())
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 1, Col: 0}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 1, Col: 0}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var10))
 		if templ_7745c5c3_Err != nil {
@@ -170,7 +170,7 @@ func Layout(view ViewContext, content templ.Component) templ.Component {
 		var templ_7745c5c3_Var11 string
 		templ_7745c5c3_Var11, templ_7745c5c3_Err = templ.JoinStringErrs(fmt.Sprintf("%t", isStoragePage))
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 123, Col: 207}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 126, Col: 207}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var11))
 		if templ_7745c5c3_Err != nil {
@@ -192,7 +192,7 @@ func Layout(view ViewContext, content templ.Component) templ.Component {
 		var templ_7745c5c3_Var13 string
 		templ_7745c5c3_Var13, templ_7745c5c3_Err = templ.JoinStringErrs(templ.CSSClasses(templ_7745c5c3_Var12).String())
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 1, Col: 0}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 1, Col: 0}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var13))
 		if templ_7745c5c3_Err != nil {
@@ -329,7 +329,7 @@ func Layout(view ViewContext, content templ.Component) templ.Component {
 				return templ_7745c5c3_Err
 			}
 		}
-		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 39, "</li></ul></div></div><!-- Main content --><main class=\"col-md-9 ms-sm-auto col-lg-10 px-3 px-md-4\"><div class=\"pt-3\">")
+		templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 39, "</li></ul></div></div><!-- Sidebar backdrop for mobile --><div class=\"sidebar-backdrop\" id=\"sidebarBackdrop\"></div><!-- Main content --><main class=\"col-md-9 ms-sm-auto col-lg-10 px-3 px-md-4\"><div class=\"pt-3\">")
 		if templ_7745c5c3_Err != nil {
 			return templ_7745c5c3_Err
 		}
@@ -344,7 +344,7 @@ func Layout(view ViewContext, content templ.Component) templ.Component {
 		var templ_7745c5c3_Var14 string
 		templ_7745c5c3_Var14, templ_7745c5c3_Err = templ.JoinStringErrs(fmt.Sprintf("%d", time.Now().Year()))
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 325, Col: 60}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 331, Col: 60}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var14))
 		if templ_7745c5c3_Err != nil {
@@ -357,7 +357,7 @@ func Layout(view ViewContext, content templ.Component) templ.Component {
 		var templ_7745c5c3_Var15 string
 		templ_7745c5c3_Var15, templ_7745c5c3_Err = templ.JoinStringErrs(version.VERSION_NUMBER)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 325, Col: 102}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 331, Col: 102}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var15))
 		if templ_7745c5c3_Err != nil {
@@ -409,7 +409,7 @@ func LoginForm(title string, errorMessage string, csrfToken string) templ.Compon
 		var templ_7745c5c3_Var17 string
 		templ_7745c5c3_Var17, templ_7745c5c3_Err = templ.JoinStringErrs(title)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 353, Col: 17}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 359, Col: 17}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var17))
 		if templ_7745c5c3_Err != nil {
@@ -422,7 +422,7 @@ func LoginForm(title string, errorMessage string, csrfToken string) templ.Compon
 		var templ_7745c5c3_Var18 string
 		templ_7745c5c3_Var18, templ_7745c5c3_Err = templ.JoinStringErrs(title)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 367, Col: 57}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 373, Col: 57}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var18))
 		if templ_7745c5c3_Err != nil {
@@ -440,7 +440,7 @@ func LoginForm(title string, errorMessage string, csrfToken string) templ.Compon
 			var templ_7745c5c3_Var19 string
 			templ_7745c5c3_Var19, templ_7745c5c3_Err = templ.JoinStringErrs(errorMessage)
 			if templ_7745c5c3_Err != nil {
-				return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 374, Col: 45}
+				return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 380, Col: 45}
 			}
 			_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var19))
 			if templ_7745c5c3_Err != nil {
@@ -458,7 +458,7 @@ func LoginForm(title string, errorMessage string, csrfToken string) templ.Compon
 		var templ_7745c5c3_Var20 string
 		templ_7745c5c3_Var20, templ_7745c5c3_Err = templ.JoinStringErrs(csrfToken)
 		if templ_7745c5c3_Err != nil {
-			return templ.Error{Err: templ_7745c5c3_Err, FileName: `view/layout/layout.templ`, Line: 379, Col: 84}
+			return templ.Error{Err: templ_7745c5c3_Err, FileName: `weed/admin/view/layout/layout.templ`, Line: 385, Col: 84}
 		}
 		_, templ_7745c5c3_Err = templ_7745c5c3_Buffer.WriteString(templ.EscapeString(templ_7745c5c3_Var20))
 		if templ_7745c5c3_Err != nil {