reworked settings page

web/settings.css

@@ -112,6 +112,73 @@
   border-top: 1px solid #e4e6eb;
 }
 
+.floating-save-btn {
+  position: fixed;
+  bottom: 24px;
+  right: 24px;
+  z-index: 20;
+  padding: 14px 22px;
+  border-radius: 999px;
+  font-size: 15px;
+  font-weight: 700;
+  color: #fff;
+  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
+  border: none;
+  box-shadow: 0 10px 30px rgba(37, 99, 235, 0.35);
+  cursor: pointer;
+  transition: transform 0.15s ease, box-shadow 0.2s ease;
+  min-width: 210px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+}
+
+.floating-save-btn:hover {
+  transform: translateY(-1px);
+  box-shadow: 0 14px 34px rgba(37, 99, 235, 0.4);
+}
+
+.floating-save-btn:disabled {
+  opacity: 0.7;
+  cursor: not-allowed;
+  transform: none;
+  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
+}
+
+.floating-save-btn:focus {
+  outline: 3px solid rgba(37, 99, 235, 0.35);
+  outline-offset: 3px;
+}
+
+.floating-save-btn .spinner {
+  font-size: 16px;
+  line-height: 1;
+}
+
+.floating-save-btn.is-saving {
+  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
+}
+
+.floating-save-btn .spin {
+  animation: spin 1s linear infinite;
+}
+
+@keyframes spin {
+  from { transform: rotate(0deg); }
+  to { transform: rotate(360deg); }
+}
+
+@media (max-width: 640px) {
+  .floating-save-btn {
+    left: 16px;
+    right: 16px;
+    bottom: 16px;
+    width: auto;
+    justify-content: center;
+  }
+}
+
 /* Credentials List */
 
 .credentials-list {