theme switcher

NOTICE

@@ -11,6 +11,7 @@ The Android application (android/) contains modified code from:
   Licensed under Apache License 2.0
 
 Major modifications:
+
 - Completely replaced HTTP/WebSocket polling with Signal-based push delivery
 - Removed all user authentication, attachment downloads, and action buttons
 - Removed Firebase, certificate pinning, and instant delivery features

server/public/index.css

@@ -1,3 +1,50 @@
+:root {
+  --bg-primary: #f5f5f5;
+  --bg-secondary: #fdfdfd;
+  --text-primary: #000;
+  --text-secondary: #666;
+  --border-color: rgba(0, 0, 0, 0.1);
+  --accent: #8159b8;
+  --success: #28a745;
+  --error: #dc3545;
+  --spinner-track: #e0e0e0;
+}
+
+@media (prefers-color-scheme: dark) {
+  :root {
+    --bg-primary: #1a1a1a;
+    --bg-secondary: #2d2d2d;
+    --text-primary: #e0e0e0;
+    --text-secondary: #a0a0a0;
+    --border-color: rgba(255, 255, 255, 0.1);
+    --success: #28a745;
+    --error: #ef4444;
+    --spinner-track: #4a4a4a;
+  }
+}
+
+[data-theme="light"] {
+  --bg-primary: #f5f5f5;
+  --bg-secondary: #fdfdfd;
+  --text-primary: #000;
+  --text-secondary: #666;
+  --border-color: rgba(0, 0, 0, 0.1);
+  --success: #28a745;
+  --error: #dc3545;
+  --spinner-track: #e0e0e0;
+}
+
+[data-theme="dark"] {
+  --bg-primary: #1a1a1a;
+  --bg-secondary: #2d2d2d;
+  --text-primary: #e0e0e0;
+  --text-secondary: #a0a0a0;
+  --border-color: rgba(255, 255, 255, 0.1);
+  --success: #28a745;
+  --error: #ef4444;
+  --spinner-track: #4a4a4a;
+}
+
 /* CSS Reset */
 *,
 *::before,
@@ -46,16 +93,17 @@ body {
   font-family: system-ui;
   max-width: 50rem;
   margin: 1.25rem auto;
-  padding: 1.25rem;
+  padding: 0 1.25rem 1.25rem;
-  background: #f5f5f5;
+  background: var(--bg-primary);
+  color: var(--text-primary);
 }
 
 .card {
-  background: white;
+  background: var(--bg-secondary);
   border-radius: 0.5rem;
   padding: 1.25rem;
   margin-bottom: 1.25rem;
-  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.1);
+  box-shadow: 0 0.125rem 0.25rem var(--border-color);
 }
 
 h2 {
@@ -87,16 +135,18 @@ h2 {
   left: 50%;
   transform: translateX(-50%);
   margin-bottom: 0.5rem;
-  background: #333;
+  background: var(--bg-secondary);
-  color: white;
+  color: var(--text-primary);
   padding: 0.375rem 0.625rem;
   border-radius: 0.25rem;
+  border: 1px solid var(--border-color);
   font-size: 0.875rem;
   font-weight: 400;
   white-space: nowrap;
   transition: opacity 0.2s;
   pointer-events: none;
   z-index: 10;
+  box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.2);
 }
 
 .status-item .tooltip::after {
@@ -106,7 +156,7 @@ h2 {
   left: 50%;
   transform: translateX(-50%);
   border: 0.3125rem solid transparent;
-  border-top-color: #333;
+  border-top-color: var(--bg-secondary);
 }
 
 .status-item:hover .tooltip {
@@ -114,14 +164,33 @@ h2 {
   opacity: 1;
 }
 
+.theme-toggle {
+  position: fixed;
+  bottom: 1.5rem;
+  right: 1.5rem;
+  background: transparent;
+  border: none;
+  cursor: pointer;
+  font-size: 1.5rem;
+  padding: 0;
+  line-height: 1;
+  opacity: 0.4;
+  transition: opacity 0.2s;
+  z-index: 100;
+}
+
+.theme-toggle:hover {
+  opacity: 0.8;
+}
+
 .status-ok {
-  background: #d4edda;
+  background: var(--success);
-  color: #155724;
+  color: white;
 }
 
 .status-error {
-  background: #f8d7da;
+  background: var(--error);
-  color: #721c24;
+  color: white;
 }
 
 .endpoint-list {
@@ -135,7 +204,7 @@ h2 {
   display: flex;
   align-items: center;
   padding: 0.5rem 0.75rem;
-  background: #f8f9fa;
+  background: var(--bg-primary);
   border-radius: 0.25rem;
   margin-bottom: 0.375rem;
 }
@@ -147,29 +216,31 @@ h2 {
 
 .btn-delete {
   padding: 0.375rem 0.75rem;
-  background: #dc3545;
+  background: var(--error);
   color: white;
   border: none;
   border-radius: 0.25rem;
   cursor: pointer;
+  transition: filter 0.2s;
 }
 
 .btn-delete:hover {
-  background: #c82333;
+  filter: brightness(0.9);
 }
 
 .btn-cancel {
   margin-top: 1rem;
   padding: 0.5rem 1rem;
-  background: #6c757d;
+  background: var(--text-secondary);
   color: white;
   border: none;
   border-radius: 0.25rem;
   cursor: pointer;
+  transition: filter 0.2s;
 }
 
 .btn-cancel:hover {
-  background: #5a6268;
+  filter: brightness(0.9);
 }
 
 .unlink-details {
@@ -211,21 +282,22 @@ h2 {
 .link-button {
   display: inline-block;
   padding: 0.625rem 1.25rem;
-  background: #8159b8;
+  background: var(--accent);
   color: white;
   text-decoration: none;
   border-radius: 0.25rem;
   margin-top: 0.625rem;
   border: none;
   cursor: pointer;
+  transition: filter 0.2s;
 }
 
 .link-button:hover {
-  background: #6b4a99;
+  filter: brightness(0.9);
 }
 
 .loading {
-  color: #666;
+  color: var(--text-secondary);
   display: flex;
   align-items: center;
   gap: 0.5rem;
@@ -234,8 +306,8 @@ h2 {
 .spinner {
   width: 1.25rem;
   height: 1.25rem;
-  border: 0.125rem solid #e0e0e0;
+  border: 0.125rem solid var(--spinner-track);
-  border-top-color: #8159b8;
+  border-top-color: var(--accent);
   border-radius: 50%;
   animation: spin 0.8s linear infinite;
 }
@@ -248,6 +320,6 @@ h2 {
 
 .loading-subtitle {
   font-size: 0.875rem;
-  color: #666;
+  color: var(--text-secondary);
   margin-top: 0.5rem;
 }

server/public/index.html

@@ -9,8 +9,11 @@
   <link rel="manifest" href="/manifest.json">
   <link rel="stylesheet" href="/index.css">
   <script src="/htmx.min.js"></script>
+  <script src="/theme.js"></script>
 </head>
 <body>
+  <button id="theme-toggle" class="theme-toggle"></button>
+  
   <div class="card">
     <div id="health-status" 
          hx-get="/fragment/health" 

server/public/manifest.json

@@ -11,12 +11,6 @@
       "src": "/favicon.webp",
       "sizes": "32x32",
       "type": "image/webp",
-      "purpose": "any"
-    },
-    {
-      "src": "/icon-512.webp",
-      "sizes": "512x512",
-      "type": "image/webp",
       "purpose": "any maskable"
     }
   ]

server/public/theme.js

@@ -0,0 +1,43 @@
+const themes = ['system', 'light', 'dark'];
+let currentIndex = 0;
+
+const savedTheme = localStorage.getItem('theme') || 'system';
+currentIndex = themes.indexOf(savedTheme);
+if (currentIndex === -1) currentIndex = 0;
+
+function applyTheme(theme) {
+  if (theme === 'system') {
+    document.documentElement.removeAttribute('data-theme');
+  } else {
+    document.documentElement.setAttribute('data-theme', theme);
+  }
+  localStorage.setItem('theme', theme);
+}
+
+window.cycleTheme = () => {
+  currentIndex = (currentIndex + 1) % themes.length;
+  const newTheme = themes[currentIndex];
+  applyTheme(newTheme);
+  updateButtonText(newTheme);
+};
+
+function updateButtonText(theme) {
+  const btn = document.getElementById('theme-toggle');
+  if (btn) {
+    btn.textContent = theme === 'system' ? '🌓' : theme === 'light' ? '☀️' : '🌙';
+  }
+}
+
+applyTheme(savedTheme);
+
+if (document.readyState === 'loading') {
+  document.addEventListener('DOMContentLoaded', () => {
+    updateButtonText(themes[currentIndex]);
+    const btn = document.getElementById('theme-toggle');
+    if (btn) btn.addEventListener('click', window.cycleTheme);
+  });
+} else {
+  updateButtonText(themes[currentIndex]);
+  const btn = document.getElementById('theme-toggle');
+  if (btn) btn.addEventListener('click', window.cycleTheme);
+}