build: improve Windows resource compile logging and error messages

refactor: ビルド資産を build_assets に集約し src/backend を整理Section内容を簡潔に。Section内容を簡潔に。Section内容を簡潔に。Section内容を簡潔に。

fix: mcp.json およびモデルファイルを MSI リソースに確実に同梱Section内容を簡潔に。Section内容を簡潔に。Section内容を簡潔に。

fix: リソースのフラット化により MSI 起動時の DLL 欠落エラーを根本修正Section内容を簡潔に。

chore: migrate MCP config to port (SSE) format

feat: add real-time status visibility (connections & db stats) and fix vector search query syntax error

feat: add platform-independent release automation script

chore: robust path resolution for production and installer compatibility ...

- Use Tauri Path Resolver for AppData (DB/Logs) and ResourceDir (DLLs)
- Automated vec0.dll syncing to resources/ during setup
- Improved sidecar path calculation for both dev and prod environments

feat: automate .env creation during setup for zero-config onboarding

chore: comprehensive project restructuring and cleanup ...

- Moved backend source to src/backend
- Consolidated build artifacts to root target/
- Organized assets to resources/ and documentation to document/
- Updated README with detailed architecture and simplified onboarding
- Fixed minor bug in lib.rs database initialization
- Cleaned up obsolete Electron-era files and test scripts

feat: integrate llama-server sidecar with Gemma 3 300M support