feat(hub): add dark/light theme toggle with moon and sun icons

Co-authored-by: Cursor <cursoragent@cursor.com>

manual_trading_hub/static/app.css

@@ -1,8 +1,14 @@
-:root {
+:root,
+html[data-theme="dark"] {
   --bg: #050810;
   --bg-elevated: #0a1018;
   --panel: rgba(12, 20, 32, 0.82);
   --panel-hover: rgba(18, 28, 44, 0.9);
+  --panel-solid: #141a2a;
+  --panel-solid-border: #2a3150;
+  --nav-bg: rgba(0, 0, 0, 0.35);
+  --overlay: rgba(0, 0, 0, 0.45);
+  --chart-surface: #0a1018;
   --text: #e8f4ff;
   --muted: #6b8aa8;
   --border: rgba(0, 212, 255, 0.22);
@@ -19,6 +25,31 @@
   --display: "Orbitron", var(--font);
   --mono: var(--font);
   --layout-max: 1520px;
+  color-scheme: dark;
+}
+
+html[data-theme="light"] {
+  --bg: #e8eef5;
+  --bg-elevated: #ffffff;
+  --panel: rgba(255, 255, 255, 0.94);
+  --panel-hover: rgba(248, 252, 255, 0.98);
+  --panel-solid: #ffffff;
+  --panel-solid-border: #c8d4e4;
+  --nav-bg: rgba(255, 255, 255, 0.88);
+  --overlay: rgba(15, 35, 60, 0.35);
+  --chart-surface: #f4f7fb;
+  --text: #152030;
+  --muted: #5a6f85;
+  --border: rgba(0, 120, 170, 0.28);
+  --border-soft: rgba(0, 90, 140, 0.14);
+  --green: #0a8f5c;
+  --red: #c93552;
+  --accent: #007aa8;
+  --accent-2: #5b4fc7;
+  --accent-dim: rgba(0, 122, 168, 0.1);
+  --glow: 0 0 18px rgba(0, 122, 168, 0.12);
+  --shadow: 0 8px 28px rgba(20, 50, 90, 0.1);
+  color-scheme: light;
 }
 
 * {
@@ -171,10 +202,51 @@ a:hover {
   }
 }
 
+.theme-toggle {
+  display: inline-flex;
+  align-items: center;
+  gap: 2px;
+  padding: 3px;
+  border-radius: var(--radius);
+  border: 1px solid var(--border-soft);
+  background: var(--nav-bg);
+  backdrop-filter: blur(8px);
+}
+
+.theme-toggle-btn {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 34px;
+  height: 32px;
+  padding: 0;
+  border: none;
+  border-radius: 7px;
+  background: transparent;
+  color: var(--muted);
+  cursor: pointer;
+  transition: background 0.15s, color 0.15s, box-shadow 0.15s;
+}
+
+.theme-toggle-btn:hover {
+  color: var(--text);
+  background: var(--panel-hover);
+}
+
+.theme-toggle-btn.is-active {
+  color: var(--accent);
+  background: var(--accent-dim);
+  box-shadow: inset 0 0 0 1px var(--border);
+}
+
+.theme-toggle-btn .theme-icon {
+  display: block;
+}
+
 .top-nav {
   display: flex;
   gap: 4px;
-  background: rgba(0, 0, 0, 0.35);
+  background: var(--nav-bg);
   padding: 4px;
   border-radius: var(--radius);
   border: 1px solid var(--border-soft);
@@ -1335,8 +1407,8 @@ body.market-chart-fs-open {
 }
 
 .hub-trend-plan-card.plan-position-card {
-  background: #141a2a;
-  border: 1px solid #2a3150;
+  background: var(--panel-solid);
+  border: 1px solid var(--panel-solid-border);
   border-radius: 12px;
   padding: 12px 14px;
 }
@@ -2108,12 +2180,23 @@ button.btn-sm {
 /* —— 登录页 —— */
 body.login-page {
   display: flex;
+  flex-direction: column;
   align-items: center;
   justify-content: center;
   min-height: 100vh;
   padding: 24px;
 }
 
+.login-theme-bar {
+  position: relative;
+  z-index: 2;
+  width: 100%;
+  max-width: 400px;
+  display: flex;
+  justify-content: flex-end;
+  margin-bottom: 10px;
+}
+
 .login-panel {
   position: relative;
   z-index: 1;
@@ -2512,7 +2595,7 @@ body.login-page {
   min-height: 380px;
   border: 1px solid var(--border-soft);
   border-radius: var(--radius);
-  background: #0a1018;
+  background: var(--chart-surface);
   overflow: hidden;
 }
 
@@ -2951,3 +3034,81 @@ body.login-page {
   border-color: rgba(0, 255, 157, 0.45);
   background: rgba(0, 255, 157, 0.1);
 }
+
+/* —— 亮色主题：背景与局部硬编码色 —— */
+html[data-theme="light"] .app-bg,
+html[data-theme="light"] .login-bg {
+  background:
+    linear-gradient(rgba(0, 100, 150, 0.06) 1px, transparent 1px),
+    linear-gradient(90deg, rgba(0, 100, 150, 0.06) 1px, transparent 1px),
+    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 140, 200, 0.1), transparent),
+    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(90, 80, 200, 0.06), transparent);
+  background-size: 48px 48px, 48px 48px, auto, auto;
+}
+
+html[data-theme="light"] .app-bg::after,
+html[data-theme="light"] .login-bg::after {
+  opacity: 0.15;
+}
+
+html[data-theme="light"] .market-ind-options {
+  background: rgba(255, 255, 255, 0.98);
+  box-shadow: var(--shadow);
+}
+
+html[data-theme="light"] .market-price-auto {
+  background: rgba(255, 255, 255, 0.95);
+}
+
+html[data-theme="light"] .market-price-auto.is-on {
+  color: var(--green);
+  background: rgba(10, 143, 92, 0.12);
+}
+
+html[data-theme="light"] .hub-trend-plan-card .plan-card-meta,
+html[data-theme="light"] .hub-trend-plan-card .plan-cell .lbl,
+html[data-theme="light"] .hub-trend-plan-card .plan-dca-title {
+  color: var(--muted);
+}
+
+html[data-theme="light"] .hub-trend-plan-card .plan-card-meta .accent {
+  color: var(--accent);
+}
+
+html[data-theme="light"] .hub-trend-plan-card .plan-cell .val {
+  color: var(--text);
+}
+
+html[data-theme="light"] .hub-trend-plan-card .plan-dca-table th {
+  color: var(--muted);
+}
+
+html[data-theme="light"] .hub-trend-plan-card .plan-dca-table th,
+html[data-theme="light"] .hub-trend-plan-card .plan-dca-table td {
+  border-bottom-color: var(--border-soft);
+}
+
+html[data-theme="light"] .hub-trend-plan-card .hub-plan-be-input {
+  background: var(--bg-elevated);
+  border-color: var(--border-soft);
+  color: var(--text);
+}
+
+html[data-theme="light"] .exchange-fullscreen-panel,
+html[data-theme="light"] .modal-panel {
+  box-shadow: var(--shadow);
+}
+
+html[data-theme="light"] input,
+html[data-theme="light"] select,
+html[data-theme="light"] textarea {
+  background: var(--bg-elevated);
+  color: var(--text);
+  border-color: var(--border-soft);
+}
+
+html[data-theme="light"] .hub-tile,
+html[data-theme="light"] .hub-pos-card,
+html[data-theme="light"] .settings-row {
+  box-shadow: 0 2px 12px rgba(20, 50, 90, 0.06);
+}