feat(logs): redesign LogsPage with structured log parsing and virtual scrolling

- Add log line parser to extract timestamp, level, status code, latency, IP, HTTP method, and path
  - Implement virtual scrolling with load-more on scroll-up to handle large log files efficiently
  - Replace monolithic pre block with structured grid layout for better readability
  - Add visual badges for log levels and HTTP status codes with color-coded severity
  - Add IconRefreshCw icon component
  - Update ToggleSwitch to accept ReactNode as label
  - Fix fetchConfig calls to use default parameters consistently
  - Add request deduplication in useConfigStore to prevent duplicate /config API calls
  - Add i18n keys for load_more_hint and hidden_lines

src/components/ui/ToggleSwitch.tsx

@@ -1,9 +1,9 @@
-import type { ChangeEvent } from 'react';
+import type { ChangeEvent, ReactNode } from 'react';
 
 interface ToggleSwitchProps {
   checked: boolean;
   onChange: (value: boolean) => void;
-  label?: string;
+  label?: ReactNode;
   disabled?: boolean;
 }