feat(ui): redesign cliproxy page with master-detail layout

- Replace tab-based layout with sidebar + detail panel pattern
- Add provider navigation in left sidebar with quick actions
- Implement provider detail panel with model preferences and accounts
- Add Config Editor and Logs quick access in sidebar
- Fix naming consistency: Clipproxy → Cliproxy (single p) across 8 files
- Fix TypeScript errors for models and stats data shapes

src/cliproxy/index.ts

@@ -103,8 +103,8 @@ export {
 } from './auth-handler';
 
 // Stats fetcher
-export type { ClipproxyStats } from './stats-fetcher';
-export { fetchClipproxyStats, isClipproxyRunning } from './stats-fetcher';
+export type { CliproxyStats } from './stats-fetcher';
+export { fetchCliproxyStats, isCliproxyRunning } from './stats-fetcher';
 
 // OpenAI compatibility layer
 export type { OpenAICompatProvider, OpenAICompatModel } from './openai-compat-manager';