diff --git a/CHANGELOG.md b/CHANGELOG.md
index b763a3d..eaef49b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@
 - Redesigned the Web UI into dedicated overview, login workspace, accounts, send console, logs, and settings views.
 - Moved the console styling and interaction scripts into `DouYinSparkFlow/webui/static/` with a denser admin-console layout and mobile drawer navigation.
 - Added safer confirmations for manual operations and localized the main Web UI feedback messages.
+- Removed the redundant send-console navigation label while keeping send details available from contextual actions.
+- Added a persistent sun/moon toggle for switching between light and dark console themes.
 - Added a project disclaimer to the root README.
 - Added a Linux Do friendly link and GitHub star history chart.
 - Refined the root README wording and structure for an open source project style.
diff --git a/DouYinSparkFlow/webui/static/app.css b/DouYinSparkFlow/webui/static/app.css
index 39fc7ff..25cdf44 100644
--- a/DouYinSparkFlow/webui/static/app.css
+++ b/DouYinSparkFlow/webui/static/app.css
@@ -1,8 +1,11 @@
 :root {
   --bg: #f5f7fb;
+  --bg-start: #f8fafc;
+  --login-bg-end: #eef2f7;
   --surface: #ffffff;
   --surface-muted: #f8fafc;
   --surface-soft: #f1f5f9;
+  --surface-overlay: rgba(255, 255, 255, 0.92);
   --border: #e2e8f0;
   --border-strong: #cbd5e1;
   --text: #0f172a;
@@ -11,14 +14,29 @@
   --primary: #2563eb;
   --primary-hover: #1d4ed8;
   --primary-soft: #eff6ff;
+  --primary-border: #bfdbfe;
+  --on-primary: #ffffff;
   --success: #16a34a;
   --success-soft: #ecfdf3;
+  --success-text: #166534;
+  --success-border: #bbf7d0;
   --danger: #dc2626;
   --danger-soft: #fef2f2;
+  --danger-text: #991b1b;
+  --danger-border: #fecaca;
   --warning: #d97706;
   --warning-soft: #fff7ed;
+  --warning-text: #92400e;
+  --warning-border: #fed7aa;
   --info: #0284c7;
   --info-soft: #eff6ff;
+  --input-bg: #ffffff;
+  --frame-bg: #0f172a;
+  --frame-toolbar-bg: #111827;
+  --frame-text: #e5e7eb;
+  --frame-muted: #cbd5e1;
+  --focus-ring: rgba(37, 99, 235, 0.12);
+  --backdrop: rgba(15, 23, 42, 0.32);
   --shadow: 0 14px 34px rgba(15, 23, 42, 0.07);
   --shadow-soft: 0 8px 22px rgba(15, 23, 42, 0.05);
   --radius-lg: 18px;
@@ -27,6 +45,49 @@
   --sidebar-width: 248px;
 }
 
+html[data-theme="dark"] {
+  color-scheme: dark;
+  --bg: #0b1120;
+  --bg-start: #111827;
+  --login-bg-end: #0b1120;
+  --surface: #111827;
+  --surface-muted: #0f172a;
+  --surface-soft: #1e293b;
+  --surface-overlay: rgba(15, 23, 42, 0.94);
+  --border: #263449;
+  --border-strong: #334155;
+  --text: #e5e7eb;
+  --text-muted: #94a3b8;
+  --text-soft: #64748b;
+  --primary: #3b82f6;
+  --primary-hover: #60a5fa;
+  --primary-soft: rgba(59, 130, 246, 0.16);
+  --primary-border: rgba(96, 165, 250, 0.42);
+  --success: #4ade80;
+  --success-soft: rgba(74, 222, 128, 0.14);
+  --success-text: #bbf7d0;
+  --success-border: rgba(74, 222, 128, 0.32);
+  --danger: #f87171;
+  --danger-soft: rgba(248, 113, 113, 0.14);
+  --danger-text: #fecaca;
+  --danger-border: rgba(248, 113, 113, 0.35);
+  --warning: #fbbf24;
+  --warning-soft: rgba(251, 191, 36, 0.14);
+  --warning-text: #fde68a;
+  --warning-border: rgba(251, 191, 36, 0.32);
+  --info: #38bdf8;
+  --info-soft: rgba(56, 189, 248, 0.14);
+  --input-bg: #0f172a;
+  --frame-bg: #020617;
+  --frame-toolbar-bg: #0f172a;
+  --frame-text: #e2e8f0;
+  --frame-muted: #94a3b8;
+  --focus-ring: rgba(96, 165, 250, 0.18);
+  --backdrop: rgba(2, 6, 23, 0.58);
+  --shadow: 0 18px 38px rgba(0, 0, 0, 0.28);
+  --shadow-soft: 0 12px 28px rgba(0, 0, 0, 0.22);
+}
+
 * {
   box-sizing: border-box;
 }
@@ -39,7 +100,7 @@ body {
 
 body {
   color: var(--text);
-  background: linear-gradient(180deg, #f8fafc 0%, var(--bg) 100%);
+  background: linear-gradient(180deg, var(--bg-start) 0%, var(--bg) 100%);
   font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
   font-size: 14px;
 }
@@ -72,7 +133,7 @@ button {
   height: 100vh;
   padding: 22px 16px;
   border-right: 1px solid var(--border);
-  background: rgba(255, 255, 255, 0.92);
+  background: var(--surface-overlay);
   display: flex;
   flex-direction: column;
   gap: 24px;
@@ -94,7 +155,7 @@ button {
   align-items: center;
   justify-content: center;
   background: var(--primary);
-  color: #fff;
+  color: var(--on-primary);
   font-weight: 800;
   box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
 }
@@ -466,7 +527,7 @@ button,
   border-radius: 10px;
   padding: 10px 14px;
   background: var(--primary);
-  color: #fff;
+  color: var(--on-primary);
   cursor: pointer;
   display: inline-flex;
   align-items: center;
@@ -499,7 +560,7 @@ button:hover,
 
 .ghost-button {
   color: var(--text);
-  background: #fff;
+  background: var(--surface);
 }
 
 .ghost-button:hover {
@@ -509,33 +570,33 @@ button:hover,
 .soft-button {
   color: var(--primary);
   background: var(--primary-soft);
-  border-color: #bfdbfe;
+  border-color: var(--primary-border);
 }
 
 .soft-button:hover {
-  color: #fff;
+  color: var(--on-primary);
   background: var(--primary);
 }
 
 .danger-button {
   color: var(--danger);
   background: var(--danger-soft);
-  border-color: #fecaca;
+  border-color: var(--danger-border);
 }
 
 .danger-button:hover {
-  color: #fff;
+  color: var(--on-primary);
   background: var(--danger);
 }
 
 .success-button {
   color: var(--success);
   background: var(--success-soft);
-  border-color: #bbf7d0;
+  border-color: var(--success-border);
 }
 
 .success-button:hover {
-  color: #fff;
+  color: var(--on-primary);
   background: var(--success);
 }
 
@@ -546,6 +607,63 @@ button:hover,
   padding: 0;
 }
 
+.theme-toggle {
+  min-height: 40px;
+  width: 72px;
+  min-width: 72px;
+  border: 1px solid var(--border);
+  border-radius: 999px;
+  padding: 4px;
+  background: var(--surface);
+  color: var(--text-muted);
+  box-shadow: var(--shadow-soft);
+  display: inline-grid;
+  grid-template-columns: 1fr 1fr;
+  align-items: center;
+  gap: 2px;
+}
+
+.theme-toggle:hover {
+  background: var(--surface-muted);
+}
+
+.theme-icon {
+  width: 30px;
+  height: 30px;
+  border-radius: 999px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  line-height: 1;
+  font-size: 15px;
+  transition:
+    background 0.16s ease,
+    color 0.16s ease;
+}
+
+.theme-sun {
+  color: var(--warning);
+}
+
+.theme-moon {
+  color: var(--text-soft);
+}
+
+html[data-theme="light"] .theme-sun,
+html:not([data-theme]) .theme-sun {
+  background: var(--warning);
+  color: var(--on-primary);
+}
+
+html[data-theme="dark"] .theme-moon {
+  background: var(--primary);
+  color: var(--on-primary);
+}
+
+html[data-theme="dark"] .theme-sun {
+  color: var(--warning);
+}
+
 .stack-form {
   display: grid;
   gap: 14px;
@@ -587,7 +705,7 @@ select {
   min-height: 40px;
   border: 1px solid var(--border-strong);
   border-radius: 10px;
-  background: #fff;
+  background: var(--input-bg);
   color: var(--text);
   padding: 10px 12px;
   outline: none;
@@ -597,7 +715,7 @@ input:focus,
 textarea:focus,
 select:focus {
   border-color: var(--primary);
-  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
+  box-shadow: 0 0 0 3px var(--focus-ring);
 }
 
 textarea {
@@ -659,33 +777,33 @@ textarea {
   border: 1px solid var(--border);
   border-radius: var(--radius-md);
   padding: 12px 14px;
-  background: #fff;
+  background: var(--surface);
   box-shadow: var(--shadow-soft);
 }
 
 .flash.success {
-  color: #166534;
+  color: var(--success-text);
   background: var(--success-soft);
-  border-color: #bbf7d0;
+  border-color: var(--success-border);
 }
 
 .flash.warning {
-  color: #92400e;
+  color: var(--warning-text);
   background: var(--warning-soft);
-  border-color: #fed7aa;
+  border-color: var(--warning-border);
 }
 
 .flash.error {
-  color: #991b1b;
+  color: var(--danger-text);
   background: var(--danger-soft);
-  border-color: #fecaca;
+  border-color: var(--danger-border);
 }
 
 .table-shell {
   overflow-x: auto;
   border: 1px solid var(--border);
   border-radius: var(--radius-md);
-  background: #fff;
+  background: var(--surface);
 }
 
 table {
@@ -752,7 +870,7 @@ tbody tr:last-child td {
   align-items: center;
   justify-content: center;
   flex: 0 0 40px;
-  color: #fff;
+  color: var(--on-primary);
   background: var(--primary);
   font-weight: 850;
 }
@@ -815,7 +933,7 @@ tbody tr:last-child td {
   overflow: auto;
   border: 1px solid var(--border);
   border-radius: var(--radius-sm);
-  background: #fff;
+  background: var(--surface);
   padding: 8px;
   display: grid;
   gap: 6px;
@@ -832,7 +950,7 @@ tbody tr:last-child td {
 }
 
 .friend-option.selected {
-  border-color: #bfdbfe;
+  border-color: var(--primary-border);
   background: var(--primary-soft);
 }
 
@@ -862,7 +980,7 @@ tbody tr:last-child td {
   border: 1px solid var(--border);
   border-radius: var(--radius-lg);
   overflow: hidden;
-  background: #0f172a;
+  background: var(--frame-bg);
 }
 
 .browser-frame-toolbar {
@@ -871,8 +989,8 @@ tbody tr:last-child td {
   justify-content: space-between;
   gap: 12px;
   padding: 12px;
-  background: #111827;
-  color: #e5e7eb;
+  background: var(--frame-toolbar-bg);
+  color: var(--frame-text);
 }
 
 .url-field {
@@ -887,14 +1005,14 @@ tbody tr:last-child td {
   min-height: 520px;
   border: 0;
   display: block;
-  background: #0f172a;
+  background: var(--frame-bg);
 }
 
 .frame-help {
-  border-top: 1px solid rgba(255, 255, 255, 0.08);
+  border-top: 1px solid var(--border);
   padding: 12px 14px;
-  color: #cbd5e1;
-  background: #111827;
+  color: var(--frame-muted);
+  background: var(--frame-toolbar-bg);
   font-size: 13px;
 }
 
@@ -1026,7 +1144,7 @@ tbody tr:last-child td {
   overflow: auto;
   border-radius: var(--radius-md);
   padding: 14px;
-  background: #0f172a;
+  background: var(--frame-bg);
   color: #dbeafe;
   font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
   font-size: 12px;
@@ -1048,7 +1166,11 @@ tbody tr:last-child td {
   display: grid;
   place-items: center;
   padding: 24px;
-  background: linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
+  background: linear-gradient(
+    180deg,
+    var(--bg-start) 0%,
+    var(--login-bg-end) 100%
+  );
 }
 
 .login-card {
@@ -1056,7 +1178,7 @@ tbody tr:last-child td {
   border: 1px solid var(--border);
   border-radius: var(--radius-lg);
   padding: 28px;
-  background: #fff;
+  background: var(--surface);
   box-shadow: var(--shadow);
 }
 
@@ -1097,7 +1219,7 @@ tbody tr:last-child td {
     height: 58px;
     padding: 10px 16px;
     border-bottom: 1px solid var(--border);
-    background: rgba(255, 255, 255, 0.94);
+    background: var(--surface-overlay);
     display: flex;
     align-items: center;
     justify-content: space-between;
@@ -1119,7 +1241,7 @@ tbody tr:last-child td {
     position: fixed;
     inset: 0;
     z-index: 15;
-    background: rgba(15, 23, 42, 0.32);
+    background: var(--backdrop);
   }
 
   body.nav-open .sidebar-backdrop {
diff --git a/DouYinSparkFlow/webui/static/app.js b/DouYinSparkFlow/webui/static/app.js
index b943fb4..a6d49b9 100644
--- a/DouYinSparkFlow/webui/static/app.js
+++ b/DouYinSparkFlow/webui/static/app.js
@@ -1,3 +1,57 @@
+(() => {
+  const storageKey = "sparkflow-theme";
+  const root = document.documentElement;
+
+  const readStoredTheme = () => {
+    try {
+      return window.localStorage.getItem(storageKey);
+    } catch {
+      return null;
+    }
+  };
+
+  const writeStoredTheme = (theme) => {
+    try {
+      window.localStorage.setItem(storageKey, theme);
+    } catch {
+      // Ignore storage restrictions; the current page can still switch theme.
+    }
+  };
+
+  const preferredTheme = () => {
+    const stored = readStoredTheme();
+    if (stored === "dark" || stored === "light") return stored;
+    return window.matchMedia?.("(prefers-color-scheme: dark)").matches
+      ? "dark"
+      : "light";
+  };
+
+  const applyTheme = (theme) => {
+    const normalized = theme === "dark" ? "dark" : "light";
+    root.dataset.theme = normalized;
+    root.style.colorScheme = normalized;
+    const nextLabel = normalized === "dark" ? "切换白天模式" : "切换黑夜模式";
+    document.querySelectorAll("[data-theme-toggle]").forEach((button) => {
+      button.setAttribute("aria-label", nextLabel);
+      button.setAttribute("title", nextLabel);
+      button.setAttribute(
+        "aria-pressed",
+        normalized === "dark" ? "true" : "false",
+      );
+    });
+  };
+
+  applyTheme(preferredTheme());
+
+  document.querySelectorAll("[data-theme-toggle]").forEach((button) => {
+    button.addEventListener("click", () => {
+      const next = root.dataset.theme === "dark" ? "light" : "dark";
+      writeStoredTheme(next);
+      applyTheme(next);
+    });
+  });
+})();
+
 (() => {
   const body = document.body;
   const navToggle = document.querySelector("[data-nav-toggle]");
diff --git a/DouYinSparkFlow/webui/templates/accounts.html b/DouYinSparkFlow/webui/templates/accounts.html
index 5a9cf55..9b73fca 100644
--- a/DouYinSparkFlow/webui/templates/accounts.html
+++ b/DouYinSparkFlow/webui/templates/accounts.html
@@ -7,7 +7,6 @@
 
 {% block topbar_actions %}
 <a class="ghost-button" href="/login-workspace">登录工作区</a>
-<a class="soft-button" href="/ops/send-console">发送控制台</a>
 {% endblock %}
 
 {% block content %}
diff --git a/DouYinSparkFlow/webui/templates/base.html b/DouYinSparkFlow/webui/templates/base.html
index 1713170..e2b13b2 100644
--- a/DouYinSparkFlow/webui/templates/base.html
+++ b/DouYinSparkFlow/webui/templates/base.html
@@ -22,6 +22,16 @@
           <span class="brand-mark">⚡</span>
           <span>自动续火花</span>
         </div>
+        <button
+          type="button"
+          class="theme-toggle"
+          data-theme-toggle
+          aria-label="切换黑夜模式"
+          title="切换黑夜模式"
+        >
+          <span class="theme-icon theme-sun" aria-hidden="true">☀</span>
+          <span class="theme-icon theme-moon" aria-hidden="true">☾</span>
+        </button>
       </div>
 
       <div class="sidebar-backdrop" data-nav-close></div>
@@ -31,7 +41,7 @@
           <div class="brand-mark">⚡</div>
           <div>
             <div class="brand-title">自动续火花</div>
-            <div class="brand-subtitle">多账号发送控制台</div>
+            <div class="brand-subtitle">多账号运维面板</div>
           </div>
         </div>
 
@@ -49,13 +59,6 @@
 
           <section class="nav-group">
             <p class="nav-group-title">发送</p>
-            <a
-              class="nav-item {% if current_nav|trim == 'send_console' %}active{% endif %}"
-              href="/ops/send-console"
-            >
-              <span class="nav-icon">✦</span>
-              <span>发送控制台</span>
-            </a>
             <a
               class="nav-item {% if current_nav|trim == 'login_workspace' %}active{% endif %}"
               href="/login-workspace"
@@ -117,6 +120,16 @@
             </div>
           </div>
           <div class="page-header-actions">
+            <button
+              type="button"
+              class="theme-toggle"
+              data-theme-toggle
+              aria-label="切换黑夜模式"
+              title="切换黑夜模式"
+            >
+              <span class="theme-icon theme-sun" aria-hidden="true">☀</span>
+              <span class="theme-icon theme-moon" aria-hidden="true">☾</span>
+            </button>
             {% block topbar_actions %}{% endblock %}
           </div>
         </header>
diff --git a/DouYinSparkFlow/webui/templates/dashboard.html b/DouYinSparkFlow/webui/templates/dashboard.html
index 9ad4077..7088079 100644
--- a/DouYinSparkFlow/webui/templates/dashboard.html
+++ b/DouYinSparkFlow/webui/templates/dashboard.html
@@ -7,7 +7,6 @@
 
 {% block topbar_actions %}
 <a class="ghost-button" href="/login-workspace">登录工作区</a>
-<a class="soft-button" href="/ops/send-console">发送控制台</a>
 {% endblock %}
 
 {% block content %}
@@ -87,7 +86,7 @@
           <div>
             <h2>今日发送摘要</h2>
             <p class="muted compact">
-              按账号展示今日发送、失败和待处理状态，详细明细在发送控制台查看。
+              按账号展示今日发送、失败和待处理状态，详细明细可继续展开查看。
             </p>
           </div>
           <a class="link-button" href="/ops/send-console">查看明细</a>
diff --git a/DouYinSparkFlow/webui/templates/login.html b/DouYinSparkFlow/webui/templates/login.html
index 610abae..a80d0a1 100644
--- a/DouYinSparkFlow/webui/templates/login.html
+++ b/DouYinSparkFlow/webui/templates/login.html
@@ -7,12 +7,23 @@
     <link rel="stylesheet" href="/static/app.css" />
   </head>
   <body class="login-page">
+    <button
+      type="button"
+      class="theme-toggle login-theme-toggle"
+      data-theme-toggle
+      aria-label="切换黑夜模式"
+      title="切换黑夜模式"
+    >
+      <span class="theme-icon theme-sun" aria-hidden="true">☀</span>
+      <span class="theme-icon theme-moon" aria-hidden="true">☾</span>
+    </button>
+
     <main class="login-card">
       <div class="brand login-brand">
         <div class="brand-mark">⚡</div>
         <div>
           <div class="brand-title">自动续火花</div>
-          <div class="brand-subtitle">多账号发送控制台</div>
+          <div class="brand-subtitle">多账号运维面板</div>
         </div>
       </div>
 
@@ -55,5 +66,6 @@
       </form>
       {% endif %}
     </main>
+    <script src="/static/app.js" defer></script>
   </body>
 </html>
diff --git a/DouYinSparkFlow/webui/templates/login_workspace.html b/DouYinSparkFlow/webui/templates/login_workspace.html
index bb74498..0396b2f 100644
--- a/DouYinSparkFlow/webui/templates/login_workspace.html
+++ b/DouYinSparkFlow/webui/templates/login_workspace.html
@@ -7,7 +7,6 @@
 
 {% block topbar_actions %}
 <a class="ghost-button" href="/accounts">账号管理</a>
-<a class="soft-button" href="/ops/send-console">发送控制台</a>
 {% endblock %}
 
 {% block content %}
diff --git a/DouYinSparkFlow/webui/templates/send_console.html b/DouYinSparkFlow/webui/templates/send_console.html
index 7da5766..38044ff 100644
--- a/DouYinSparkFlow/webui/templates/send_console.html
+++ b/DouYinSparkFlow/webui/templates/send_console.html
@@ -1,8 +1,8 @@
 {% extends "base.html" %}
 
 {% block nav_key %}send_console{% endblock %}
-{% block title %}发送控制台 | 自动续火花{% endblock %}
-{% block page_title %}发送控制台{% endblock %}
+{% block title %}发送明细 | 自动续火花{% endblock %}
+{% block page_title %}发送明细{% endblock %}
 {% block page_subtitle %}今日发送明细、失败队列和针对性重试{% endblock %}
 
 {% block topbar_actions %}
@@ -432,7 +432,7 @@
   <div class="console-footer">共 {{ send_console.accounts|length }} 个账号</div>
   {% else %}
   <div class="console-empty empty-state">
-    当前没有启用账号，暂无可展示的发送控制台数据。
+    当前没有启用账号，暂无可展示的发送明细。
   </div>
   {% endif %}
 </div>
diff --git a/DouYinSparkFlow/webui/templates/settings.html b/DouYinSparkFlow/webui/templates/settings.html
index 1f3e3c9..4da2c46 100644
--- a/DouYinSparkFlow/webui/templates/settings.html
+++ b/DouYinSparkFlow/webui/templates/settings.html
@@ -7,7 +7,6 @@
 
 {% block topbar_actions %}
 <a class="ghost-button" href="/ops/logs">运行日志</a>
-<a class="soft-button" href="/ops/send-console">发送控制台</a>
 {% endblock %}
 
 {% block content %}