refactor: restructure project layout

- Move main process to electron/main/
- Move preload to electron/preload/
- Add shared types in electron/shared/
- Split redis-service into modular redis/ directory
- Flatten renderer to src/ (remove src/renderer/ nesting)
- Update electron.vite.config.ts paths
- Update tsconfig paths
- Output to electron-dist/

electron/main/redis/index.ts

@@ -0,0 +1,11 @@
+// src/main/redis/index.ts
+// Redis 服务统一导出
+export * from './connection'
+export * from './keys'
+export * from './string'
+export * from './hash'
+export * from './list'
+export * from './set'
+export * from './zset'
+export * from './stream'
+export * from './server'