Refactor: Improve type safety and migrate entry scripts to TypeScript

[wnqqnw19]

Refactor: improve type safety and migrate entry scripts to TypeScript

• Replace any types with proper types in store.ts and background-connection.ts
• Replace TemporaryMessageDataType with MessageDataType for better type safety
• Convert contentscript.js, offscreen.js, and ui.js to TypeScript
• Add proper type annotations and interfaces for all converted files
• Fix Chrome extension API type issues with proper type assertions
• Replace console.warn with log.warn in background-connection.ts
• Replace require() with dynamic import() in offscreen.ts for ES module compatibility

This improves type safety across the codebase and sets the foundation for further TypeScript migrations. The converted files maintain full backward compatibility while providing better IDE support and compile-time error checking.

Files changed:

• ui/store/store.ts: Fixed preloadedState type, replaced TemporaryMessageDataType
• ui/store/background-connection.ts: Improved API types, replaced console with log
• app/scripts/contentscript.ts: Converted from JS to TS with proper types
• app/scripts/offscreen.ts: Converted from JS to TS, fixed Chrome API types
• app/scripts/ui.ts: Converted from JS to TS, added interfaces and type aliases

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