style: Implement High-Contrast Minimalism UI & feat: Hybrid Search (FTS5 BM25) ...

- Refactored UI to follow minimalist HUD design spec.
- Replaced LSA-only search with Hybrid Search (Vector + FTS5 BM25).
- Integrated trigram tokenizer for robust Japanese keyword matching.
- Fixed MCP activity log rendering issues.
- Updated documentation and added MIT LICENSE.
- Updated work journal.

docs: remove Japanese duplicate journal (keep ASCII copy)

Refactor: reorganization of root and source directories and fix Error 1412

サイドカー自動起動・監視、llama_server状態API、UI連携、ESLint/Prettier整備、journal追加

refactor: UI刷新とコード品質向上のためのリファクタリング ...

- lib.rs: ネスト解消、モジュール分割、パス解決とDB変換ロジックの共通化
- index.html: CSS, JSの外部ファイル化 (index.css, index.js)
- UI: タブ切り替え時のバグ修正、MCP設定表示の安定化
- README: システム概要と最新の更新内容を反映
- analyze_nesting.js & count_lines.js に基づく品質改善を確認済み

feat: add sidecar status indicator to UI

chore: release v0.1.1

chore: migrate to Tauri/Rust backend with SeaORM and add unit/integration tests ...

- Migrated Electron/Bun backend to Rust (Tauri v2).
- Integrated SeaORM with SQLite and sqlite-vec support.
- Implemented unit tests for LlamaClient and database initialization.
- Added integration tests for MCP handlers.
- Updated documentation (README.md, walkthrough, implementation plan).
- Improved dev environment with launch scripts and tasks.
- Followed user global rules for journaling and gitignore.