fix: unify dialog layout and fix content padding issues

- Fix negative margin overflow in all dialog content areas
- Standardize dialog structure with flex-col layout
- Add consistent py-4 spacing to all content areas
- Ensure proper spacing between header, content, and footer

Affected components:
- AddProviderDialog, EditProviderDialog
- McpFormModal, McpPanel
- UsageScriptModal
- SettingsDialog

All dialogs now follow unified layout pattern:
- DialogContent: flex flex-col max-h-[90vh]
- Content area: flex-1 overflow-y-auto px-6 py-4
- No negative margins that cause content overflow

src/components/providers/forms/hooks/useSpeedTestEndpoints.ts

@@ -122,7 +122,7 @@ export function useSpeedTestEndpoints({
         // 添加预设自己的 baseUrl
         const presetConfig = preset.config || "";
         const presetMatch = /base_url\s*=\s*["']([^"']+)["']/i.exec(
-          presetConfig
+          presetConfig,
         );
         if (presetMatch?.[1]) {
           add(presetMatch[1]);