fix: 统一输入框样式（包括密码输入框）

frontend/src/views/Settings.vue

@@ -4626,7 +4626,8 @@ watch(activeTab, (value) => {
   .ant-input,
   .ant-input-number,
   .ant-select-selector,
-  .ant-picker {
+  .ant-picker,
+  .ant-input-affix-wrapper {
     background: $bg-tertiary !important;
     border-color: $border-primary !important;
     color: $text-primary !important;
@@ -4636,7 +4637,9 @@ watch(activeTab, (value) => {
     }
     
     &:focus,
-    &.ant-picker-focused {
+    &:focus-within,
+    &.ant-picker-focused,
+    &.ant-input-affix-wrapper-focused {
       border-color: $brand-primary !important;
       box-shadow: 0 0 0 2px rgba($brand-primary, 0.08) !important;
     }
@@ -4644,6 +4647,26 @@ watch(activeTab, (value) => {
     &::placeholder {
       color: $text-tertiary !important;
     }
+    
+    // 密码输入框内的input
+    .ant-input {
+      background: transparent !important;
+      border: none !important;
+      box-shadow: none !important;
+    }
+    
+    // 密码显示/隐藏按钮
+    .ant-input-suffix {
+      color: $text-secondary !important;
+      
+      .anticon {
+        color: $text-secondary !important;
+        
+        &:hover {
+          color: $text-primary !important;
+        }
+      }
+    }
   }
   
   .ant-input-number-input {