SF-74: Client UI — MainLayout HeadContent+footer theme controls, ThemeControls component, app.css sf-footer styles

EnvelopeGenerator.Server/EnvelopeGenerator.Server.Client/Layout/MainLayout.razor

@@ -15,44 +15,13 @@
         </article>
     </main>
     <footer class="receiver-footer">
-        <span>&copy; SignFlow 2023-2024 <a href="https://digitaldata.works" target="_blank" rel="noopener">Digital Data GmbH</a></span>
+        <div class="receiver-footer__left">
-        <span class="receiver-footer__sep">&#124;</span>
+            <span>&copy; SignFlow 2023-2024 <a href="https://digitaldata.works" target="_blank" rel="noopener">Digital Data GmbH</a></span>
-        <a href="docs/privacy-policy.de-DE.html" target="_blank" rel="noopener">Datenschutz</a>
+            <span class="receiver-footer__sep">&#124;</span>
-
+            <a href="docs/privacy-policy.de-DE.html" target="_blank" rel="noopener">Datenschutz</a>
-        <div class="sf-footer-controls">
-            <select class="sf-footer-select"
-                    title="Theme wählen"
-                    @onchange="OnThemeChanged">
-                @foreach (var theme in ThemeService.AvailableThemes)
-                {
-                    <option value="@theme.Value" selected="@(theme.Value == ThemeService.ThemeName)">
-                        @theme.Label
-                    </option>
-                }
-            </select>
-            <button class="sf-footer-toggle"
-                    @onclick="OnToggleDarkMode"
-                    title="@(ThemeService.IsDarkMode ? "Light Mode" : "Dark Mode")">
-                @if (ThemeService.IsDarkMode)
-                {
-                    @* Sun *@
-                    <svg xmlns="http://www.w3.org/2000/svg" width="13" height="13" fill="currentColor" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
-                        <circle cx="12" cy="12" r="5" fill="currentColor" stroke="none"/>
-                        <line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/>
-                        <line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/>
-                        <line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/>
-                        <line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/>
-                    </svg>
-                }
-                else
-                {
-                    @* Moon *@
-                    <svg xmlns="http://www.w3.org/2000/svg" width="13" height="13" fill="currentColor" viewBox="0 0 24 24">
-                        <path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/>
-                    </svg>
-                }
-            </button>
         </div>
+
+        <ThemeControls />
     </footer>
 </div>
 
@@ -69,22 +38,6 @@
         await base.OnInitializedAsync();
     }
 
-    protected override async Task OnAfterRenderAsync(bool firstRender)
-    {
-        if (firstRender)
-            await ThemeService.InitializeAsync();
-    }
-
-    private async Task OnToggleDarkMode()
-        => await ThemeService.ToggleDarkModeAsync();
-
-    private async Task OnThemeChanged(ChangeEventArgs e)
-    {
-        var value = e.Value?.ToString();
-        if (!string.IsNullOrEmpty(value))
-            await ThemeService.SetThemeAsync(value);
-    }
-
     public void Dispose()
         => ThemeService.OnChange -= _themeChangeHandler;
 }

EnvelopeGenerator.Server/EnvelopeGenerator.Server.Client/Layout/ThemeControls.razor

@@ -0,0 +1,95 @@
+@using EnvelopeGenerator.Server.Client.Services
+@rendermode InteractiveWebAssembly
+@implements IDisposable
+
+@inject ThemeService ThemeService
+
+<div class="sf-theme-slider">
+
+    @* Moon — left end (blazing-dark) *@
+    <svg class="sf-theme-icon @(ThemeService.ThemeName == "blazing-dark" ? "sf-theme-icon--active" : "")"
+         xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="currentColor" viewBox="0 0 24 24"
+         title="Blazing Dark">
+        <path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/>
+    </svg>
+
+    @* Track wrapper: range input + left/mid/right ticks *@
+    <div class="sf-theme-track-wrapper">
+        @* Left tick *@
+        <div class="sf-theme-tick sf-theme-tick--left"></div>
+        @* Mid tick (marks the middle position) *@
+        <div class="sf-theme-tick sf-theme-tick--mid"></div>
+        @* Right tick *@
+        <div class="sf-theme-tick sf-theme-tick--right"></div>
+
+        <input type="range"
+               class="sf-theme-range"
+               min="0" max="2" step="1"
+               value="@SliderValue"
+               @oninput="OnSliderChanged"
+               title="@ThemeService.AvailableThemes[SliderValue].Label" />
+    </div>
+
+    @* Sun — right end (purple) *@
+    <svg class="sf-theme-icon @(ThemeService.ThemeName == "purple" ? "sf-theme-icon--active" : (ThemeService.ThemeName == "blazing-berry" ? "sf-theme-icon--mid" : ""))"
+         xmlns="http://www.w3.org/2000/svg" width="12" height="12" fill="currentColor" viewBox="0 0 24 24"
+         stroke="currentColor" stroke-width="1.5"
+         title="Blazing Berry / Purple">
+        <circle cx="12" cy="12" r="4" fill="currentColor" stroke="none"/>
+        <line x1="12" y1="2"  x2="12" y2="5"/>
+        <line x1="12" y1="19" x2="12" y2="22"/>
+        <line x1="4.22" y1="4.22"   x2="6.34" y2="6.34"/>
+        <line x1="17.66" y1="17.66" x2="19.78" y2="19.78"/>
+        <line x1="2"  y1="12" x2="5"  y2="12"/>
+        <line x1="19" y1="12" x2="22" y2="12"/>
+        <line x1="4.22" y1="19.78" x2="6.34" y2="17.66"/>
+        <line x1="17.66" y1="6.34" x2="19.78" y2="4.22"/>
+    </svg>
+
+</div>
+
+@code {
+    private Action? _themeChangeHandler;
+
+    /// <summary>
+    /// Maps the active theme to a 0-based slider step.
+    /// 0 = blazing-dark  (🌙 left)
+    /// 1 = blazing-berry (middle)
+    /// 2 = purple        (☀️ right)
+    /// </summary>
+    private int SliderValue => ThemeService.ThemeName switch
+    {
+        "blazing-dark" => 0,
+        "purple"       => 2,
+        _              => 1
+    };
+
+    protected override void OnInitialized()
+    {
+        _themeChangeHandler = () => InvokeAsync(StateHasChanged);
+        ThemeService.OnChange += _themeChangeHandler;
+    }
+
+    protected override async Task OnAfterRenderAsync(bool firstRender)
+    {
+        if (firstRender)
+            await ThemeService.InitializeAsync();
+    }
+
+    private async Task OnSliderChanged(ChangeEventArgs e)
+    {
+        if (!int.TryParse(e.Value?.ToString(), out var step)) return;
+
+        var themeName = step switch
+        {
+            0 => "blazing-dark",
+            2 => "purple",
+            _ => "blazing-berry"
+        };
+
+        await ThemeService.SetThemeAsync(themeName);
+    }
+
+    public void Dispose()
+        => ThemeService.OnChange -= _themeChangeHandler;
+}

EnvelopeGenerator.Server/EnvelopeGenerator.Server/wwwroot/css/app.css

@@ -342,7 +342,7 @@ article {
     height: 36px;
     display: flex;
     align-items: center;
-    justify-content: center;
+    justify-content: space-between;   /* ← left group | right group */
     gap: 10px;
     padding: 0 20px;
     background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
@@ -363,65 +363,136 @@ article {
     text-decoration: underline;
 }
 
+.receiver-footer__left {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    flex-shrink: 0;
+}
+
 .receiver-footer__sep {
     opacity: 0.4;
 }
 
-/* ── Footer: Theme & Dark Mode Controls ─────────────────────────────────── */
+/* ── Footer: Theme Slider ────────────────────────────────────────────────── */
-/* Positioned at the right end of the fixed footer bar.                     */
+/* 🌙 blazing-dark ──◇──·──◇── purple ☀️                                     */
-/* Styled to match the footer's gradient background — small, unobtrusive.  */
+/* Left group: copyright | datenschutz  →  Right group: slider               */
 
-.sf-footer-controls {
+.sf-theme-slider {
     display: flex;
     align-items: center;
-    gap: 6px;
+    gap: 7px;
-    margin-left: auto;      /* push to the right */
-}
-
-.sf-footer-select {
-    height: 22px;
-    padding: 0 5px;
-    font-size: 0.68rem;
-    line-height: 1;
-    color: rgba(255, 255, 255, 0.85);
-    background: rgba(255, 255, 255, 0.12);
-    border: 1px solid rgba(255, 255, 255, 0.22);
-    border-radius: 4px;
-    cursor: pointer;
-    outline: none;
-    /* Native select options use browser defaults — acceptable in a footer context */
-}
-
-.sf-footer-select:hover,
-.sf-footer-select:focus {
-    background: rgba(255, 255, 255, 0.20);
-    border-color: rgba(255, 255, 255, 0.38);
-}
-
-/* Force option text to be readable in browsers that support it */
-.sf-footer-select option {
-    color: #1e2e3e;
-    background: #ffffff;
-}
-
-.sf-footer-toggle {
-    width: 24px;
-    height: 22px;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    padding: 0;
-    color: rgba(255, 255, 255, 0.85);
-    background: rgba(255, 255, 255, 0.12);
-    border: 1px solid rgba(255, 255, 255, 0.22);
-    border-radius: 4px;
-    cursor: pointer;
-    transition: background 0.15s, border-color 0.15s;
     flex-shrink: 0;
 }
 
-.sf-footer-toggle:hover {
+/* Moon / Sun SVG icons */
-    background: rgba(255, 255, 255, 0.24);
+.sf-theme-icon {
-    border-color: rgba(255, 255, 255, 0.40);
+    display: block;
-    color: #ffffff;
+    opacity: 0.55;                 /* ↑ was 0.42 — more visible as base */
+    flex-shrink: 0;
+    transition: opacity 0.18s;
+    align-self: center;
+}
+
+.sf-theme-icon--active {
+    opacity: 0.92;
+}
+
+.sf-theme-icon--mid {
+    opacity: 0.62;
+}
+
+/* ── Wrapper holds the range input + tick marks ───────────────────────────── */
+.sf-theme-track-wrapper {
+    position: relative;
+    display: flex;
+    align-items: center;
+    width: 80px;
+    height: 16px;          /* enough height so ticks + thumb don't clip */
+}
+
+/* Actual range input — fills the wrapper */
+.sf-theme-range {
+    -webkit-appearance: none;
+    appearance: none;
+    position: relative;
+    z-index: 1;
+    width: 100%;
+    height: 2px;
+    background: rgba(255, 255, 255, 0.28);
+    border-radius: 1px;
+    outline: none;
+    cursor: pointer;
+    margin: 0;
+    /* no extra padding so ticks align correctly */
+}
+
+.sf-theme-range:hover {
+    background: rgba(255, 255, 255, 0.42);
+}
+
+/* Thumb — white circle */
+.sf-theme-range::-webkit-slider-thumb {
+    -webkit-appearance: none;
+    appearance: none;
+    width: 11px;
+    height: 11px;
+    border-radius: 50%;
+    background: rgba(255, 255, 255, 0.90);
+    cursor: pointer;
+    border: none;
+    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.28);
+    transition: transform 0.12s, box-shadow 0.12s;
+}
+
+.sf-theme-range::-webkit-slider-thumb:hover {
+    transform: scale(1.25);
+    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.38);
+}
+
+/* Firefox */
+.sf-theme-range::-moz-range-thumb {
+    width: 11px;
+    height: 11px;
+    border-radius: 50%;
+    background: rgba(255, 255, 255, 0.90);
+    cursor: pointer;
+    border: none;
+    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.28);
+}
+
+.sf-theme-range::-moz-range-track {
+    height: 2px;
+    background: rgba(255, 255, 255, 0.28);
+    border-radius: 1px;
+}
+
+/* ── End ticks (left & right): thin vertical bars ────────────────────────── */
+.sf-theme-tick {
+    position: absolute;
+    z-index: 0;
+    width: 2px;
+    height: 7px;
+    border-radius: 1px;
+    background: rgba(255, 255, 255, 0.45);
+    top: 50%;
+    transform: translateY(-50%);
+    pointer-events: none;
+}
+
+.sf-theme-tick--left  { left: 0; }
+.sf-theme-tick--right { right: 0; }
+
+/* Mid tick — thinner, subtler */
+.sf-theme-tick--mid {
+    left: 50%;
+    transform: translate(-50%, -50%);
+    width: 1px;
+    height: 5px;
+    background: rgba(255, 255, 255, 0.50);   /* ↑ was 0.22 */
+}
+
+/* Sun icon: always visible regardless of active state */
+.sf-theme-icon--sun {
+    opacity: 0.72;                            /* minimum visibility */
 }