Add business dashboard dark mode from Super Admin theme setting.

Login and in-app surfaces follow tenant themeMode, matching customer dark tokens, with themed switches and tighter card/table chrome.

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

apps/super-admin/src/components/ToggleSwitch.module.css

@@ -4,12 +4,42 @@
   height: 22px;
   border-radius: 999px;
   background: rgba(148, 163, 184, 0.45);
+  overflow: hidden;
   transition: background 0.2s;
   flex-shrink: 0;
 }
 
+.switch::before,
+.switch::after {
+  position: absolute;
+  top: 50%;
+  transform: translateY(-50%);
+  font-family: var(--font-en), var(--font-ui);
+  font-size: 9px;
+  font-weight: 700;
+  line-height: 1;
+  pointer-events: none;
+  z-index: 0;
+  color: var(--text-primary);
+}
+
+.switch::before {
+  content: '1';
+  left: 6px;
+}
+
+.switch::after {
+  content: '0';
+  right: 6px;
+}
+
 .switch.on {
-  background: #16a34a;
+  background: var(--primary);
+}
+
+.switch.on::before,
+.switch.on::after {
+  color: #fff;
 }
 
 .thumb {
@@ -19,9 +49,10 @@
   width: 18px;
   height: 18px;
   border-radius: 50%;
-  background: white;
+  background: #fff;
   box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
   transition: transform 0.2s;
+  z-index: 1;
 }
 
 .switch.on .thumb {