EffectiveConfig section CSS/panel updates; add ConfigFileList components

src/DnsmasqWebUI/Components/Dnsmasq/ConfigFileList.razor

@@ -0,0 +1,72 @@
+@namespace DnsmasqWebUI.Components.Dnsmasq
+@using DnsmasqWebUI.Models.Dnsmasq
+@using DnsmasqWebUI.Models.Dnsmasq.EffectiveConfig
+
+<div class="config-file-list">
+    @{
+        var configFileList = Status.ConfigFiles?.Count > 0 ? Status.ConfigFiles : ConfigSet?.Files;
+        var hasList = configFileList != null && configFileList.Count > 0;
+        var mainEntry = hasList ? configFileList![0] : null;
+        var hasMoreThanOne = hasList && configFileList!.Count > 1;
+        var fileCount = hasList ? configFileList!.Count : 2;
+        var showToggle = hasMoreThanOne || (!hasList && Status.ManagedFilePath != null);
+    }
+    <p class="config-file-list-title mb-0">Config files (load order)</p>
+    <div class="config-file-list-content-row">
+        <div class="config-file-list-list">
+            <ul class="list-unstyled config-file-list-main">
+                @if (hasList)
+                {
+                    <ConfigFileListItem Entry="@mainEntry" Status="Status" />
+                }
+                else
+                {
+                    <li><strong>Main config:</strong> @(Status.MainConfigPath ?? "—") @(Status.MainConfigPathExists ? "✓" : "(missing)")</li>
+                }
+            </ul>
+            @if (showToggle)
+            {
+                <div class="config-file-list-expandable @(_expanded ? "expanded" : null)">
+                    <div class="config-file-list-expandable-inner">
+                        <ul class="list-unstyled">
+                            @if (hasList)
+                            {
+                                @foreach (var f in configFileList!.Skip(1))
+                                {
+                                    <ConfigFileListItem Entry="f" Status="Status" />
+                                }
+                            }
+                            else
+                            {
+                                <li><strong>Managed file:</strong> @(Status.ManagedFilePath ?? "—") @(Status.ManagedFilePathExists ? "✓" : "(not created yet)")</li>
+                            }
+                        </ul>
+                    </div>
+                </div>
+            }
+        </div>
+        @if (showToggle)
+        {
+            <button type="button"
+                    class="config-file-list-toggle"
+                    @onclick="ToggleExpanded"
+                    aria-expanded="@_expanded"
+                    aria-label="@(_expanded ? "Show only main config" : "Show all config files")">
+                <i class="bi @(_expanded ? "bi-chevron-up" : "bi-chevron-down")" aria-hidden="true"></i>
+                <span>@(_expanded ? "Show less" : $"Show all ({fileCount} files)")</span>
+            </button>
+        }
+    </div>
+</div>
+
+@code {
+    [Parameter, EditorRequired]
+    public DnsmasqServiceStatus Status { get; set; } = null!;
+
+    [Parameter]
+    public DnsmasqConfigSet? ConfigSet { get; set; }
+
+    private bool _expanded;
+
+    private void ToggleExpanded() => _expanded = !_expanded;
+}

src/DnsmasqWebUI/Components/Dnsmasq/ConfigFileList.razor.css

@@ -0,0 +1,98 @@
+/* Config file list: card-style block with expandable list */
+.config-file-list {
+    --cfl-radius: var(--app-radius, 0.375rem);
+    --cfl-spacing: var(--app-spacing-md, 1rem);
+    --cfl-border: 1px solid #e9ecef;
+    --cfl-bg: #f8f9fa;
+    --cfl-bg-hover: #e9ecef;
+}
+
+.config-file-list {
+    border-radius: var(--cfl-radius);
+    border: var(--cfl-border);
+    background: var(--cfl-bg);
+    padding: var(--cfl-spacing);
+    margin-top: 0.5rem;
+}
+
+.config-file-list .config-file-list-title {
+    font-size: 0.9375rem;
+    font-weight: 600;
+    color: #212529;
+    margin-bottom: 0.5rem;
+}
+
+.config-file-list ul {
+    margin: 0;
+    padding-left: 1.25rem;
+    font-size: 0.875rem;
+    line-height: 1.6;
+    color: #495057;
+}
+
+.config-file-list ul li {
+    padding: 0.2rem 0;
+}
+
+/* Content and toggle on one row: list grows, toggle at bottom-right */
+.config-file-list-content-row {
+    display: flex;
+    align-items: flex-end;
+    gap: 0.75rem;
+}
+
+.config-file-list-list {
+    flex: 1;
+    min-width: 0;
+}
+
+.config-file-list .config-file-list-toggle {
+    display: inline-flex;
+    align-items: center;
+    gap: 0.35rem;
+    flex-shrink: 0;
+    padding: 0.35rem 0.5rem;
+    font-size: 0.8125rem;
+    font-weight: 500;
+    color: #0d6efd;
+    background: transparent;
+    border: none;
+    border-radius: var(--cfl-radius);
+    cursor: pointer;
+    transition: background-color 0.15s ease, color 0.15s ease;
+}
+
+.config-file-list .config-file-list-toggle:hover {
+    background: var(--cfl-bg-hover);
+    color: #0a58ca;
+}
+
+.config-file-list .config-file-list-toggle:focus-visible {
+    outline: 0;
+    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
+}
+
+.config-file-list .config-file-list-toggle .bi {
+    font-size: 0.875rem;
+    transition: transform 0.2s ease;
+}
+
+/* Expandable section: animate height with grid 0fr → 1fr */
+.config-file-list-expandable {
+    display: grid;
+    grid-template-rows: 0fr;
+    transition: grid-template-rows 0.25s ease-out;
+}
+
+.config-file-list-expandable.expanded {
+    grid-template-rows: 1fr;
+}
+
+.config-file-list-expandable-inner {
+    min-height: 0;
+    overflow: hidden;
+}
+
+.config-file-list-expandable-inner ul {
+    padding-top: 0.15rem;
+}

src/DnsmasqWebUI/Components/Dnsmasq/ConfigFileListItem.razor

@@ -0,0 +1,30 @@
+@namespace DnsmasqWebUI.Components.Dnsmasq
+@using DnsmasqWebUI.Models.Dnsmasq
+@using DnsmasqWebUI.Models.Dnsmasq.EffectiveConfig
+
+<li>
+    @if (Entry.IsManaged)
+    {
+        <StatusBadge Kind="StatusBadgeKind.Managed" Text="managed" Class="me-1" />
+    }
+    else
+    {
+        <StatusBadge Kind="StatusBadgeKind.SourceMain" Text="@(Entry.Source.ToString().ToLowerInvariant())" Class="me-1" />
+    }
+    @Entry.Path
+    @{
+        var isMain = string.Equals(Entry.Path, Status.MainConfigPath, StringComparison.Ordinal);
+        var isManaged = Entry.IsManaged;
+        var exists = isMain ? Status.MainConfigPathExists : (isManaged ? Status.ManagedFilePathExists : (bool?)null);
+    }
+    @if (exists == true) { <text> ✓</text> }
+    @if (exists == false) { <text> @(isManaged ? "(not created yet)" : "(missing)")</text> }
+</li>
+
+@code {
+    [Parameter, EditorRequired]
+    public DnsmasqConfigSetEntry Entry { get; set; } = null!;
+
+    [Parameter, EditorRequired]
+    public DnsmasqServiceStatus Status { get; set; } = null!;
+}

src/DnsmasqWebUI/Components/EffectiveConfig/Composition/EffectiveConfigSection.razor.css

@@ -125,6 +125,22 @@
     opacity: 1;
 }
 
+/* Animated expand/collapse: grid 0fr → 1fr */
+::deep .ec-section-collapse {
+    display: grid;
+    grid-template-rows: 0fr;
+    transition: grid-template-rows 0.25s ease-out;
+}
+
+::deep .ec-section-collapse-open {
+    grid-template-rows: 1fr;
+}
+
+::deep .ec-section-collapse-inner {
+    min-height: 0;
+    overflow: hidden;
+}
+
 ::deep .ec-section-body {
     padding: 0.25rem 1rem 0.5rem 1rem;
     padding-left: 1rem;

src/DnsmasqWebUI/Components/EffectiveConfig/Composition/EffectiveConfigSectionPanel.razor

@@ -8,7 +8,8 @@
             <span class="ec-section-title fw-bold">@Title</span>
             <i class="bi @(IsOpen ? "bi-chevron-down" : "bi-chevron-right") ec-section-chevron" aria-hidden="true"></i>
         </button>
-        <div class="collapse @(IsOpen ? "show" : "")">
+        <div class="ec-section-collapse @(IsOpen ? "ec-section-collapse-open" : "")">
+            <div class="ec-section-collapse-inner">
                 <div class="ec-section-body">
                 <ul class="list-unstyled mb-0">
                     @foreach (var f in Descriptors)
@@ -21,6 +22,7 @@
                 </div>
             </div>
         </div>
+    </div>
 </CascadingValue>
 
 @code {