chore: ジャーナル週次集約・.gitignore・tmp・ローカルDB除外 ...

- journals: 20260223の22件を週次アーカイブ 202602-009 に集約、日次ファイルを削除
- .gitignore: tmp/, .cursor/, src/backend/*.db を追加
- tmp/.gitkeep: 一時ファイル用ディレクトリをリポジトリに追加
- 既存の MCP/frontend 変更をコミットに含める

Co-authored-by: Cursor <cursoragent@cursor.com>

fix(mcp): Support direct HTTP responses for robustness and fix tools/call dispatching

fix(mcp): Align session ID parameter name and update documentation

fix(mcp): Restore missing initialize handler for protocol handshake

refactor: Split mcp.rs into functional modules and sub-tools

fix(mcp): Standardize tool responses to MCP spec & fix search_text error handling

fix: Restore version info in sidebar (moved from footer) & cleanup journal

style: Update footer copyright to DtmOjaji & remove version notation

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: append summary of recent cleanup commit to journal

docs: remove Japanese duplicate journal (keep ASCII copy)

docs: ensure ASCII-safe journal contains same original content (keep both copies)

docs: rename journal 20260223-0017 to ASCII-safe filename

UI: stabilize header/footer layout (left-aligned); remove panel borders; move brand out of search panel; add journal

feat: add schema versioning table and improve migration logic ...

- Introduced 'internal_metadata' table to track database version.
- Updated migrate_025_to_030 to use 'internal_metadata' presence as a version indicator.
- Updated 03_database_specification.md with the new table.
- Recorded in journal 20260223-0019.

feat: add database migration from v0.2.5 to v0.3.0 ...

- Implemented migrate_025_to_030 in db.rs to handle schema normalization.
- Integrated migration into init_schema.
- Data is preserved and IDs are maintained for vector consistency.
- Recorded in journal 20260223-0018.

chore: bump version to 0.3.0 and create release branch ...

- Created release/v0.3.0 branch.
- Updated version to 0.3.0 in Cargo.toml, mcp.rs, tauri.conf.json, and package.json.
- Updated Cargo.lock.
- Created journal 20260223-0016.

docs: remove English translations from journals ...

- Updated 20260223-0013 and 20260223-0015 to be Japanese only.
- Standardized journal format across recent entries.

feat: add MIME type support to documents ...

- Added 'mime' column to 'documents' table in db.rs.
- Implemented automatic MIME detection in mcp.rs 'add_item_text' tool.
- Updated search and retrieval tools in mcp.rs to return 'mime' information.
- Refreshed 03_database_specification.md to reflect the new column.
- Recorded work in journal 20260223-0015.

docs: reformat bilingual documents into separate blocks ...

- Reorganized Issue-2 journal, Issue Management rules, and Development Guide.
- Separated Japanese and English descriptions into distinct blocks for better readability.
- Issue-2.md (local sync file) was also updated but is excluded from git track.

docs: renumber specifications to ensure continuous sequence ...

- Renamed 06_development_guide.md to 05_development_guide.md.
- Renamed 07_ui_design_spec.md to 06_ui_design_spec.md.
- Updated journal to reflect the changes.

docs: correct placement of development guide and update records ...

- Restored development_guide.md to docs/specification/.
- Updated journal to reflect the separation of specs and rules.

docs: relocate rules to .agent/rules and make them bilingual ...

- Moved issue management and development guide to .agent/rules.
- Added English translations to all operational rules.
- Cleaned up obsolete files in docs/.

docs: add missing journals and update sync script ...

- Added journals 0011 and 0012.
- Updated sync_issues.mjs for robust issue tracking.
- (Deleted closed issue files per cleanup rule).

feat: normalize database schema for document-chunk separation (Issue-2) ...

- Added 'documents' table for metadata.
- Refactored 'items' table for chunk storage.
- Updated MCP tools (add_item_text, search_text, etc.) to support the new schema.
- Updated technical documentation.

Docs: Separate technical specifications from project operational workflows

Docs/Chore: Establish bilingual (Japanese/English) issue policy and update dev guide

Docs: Modernize README.md with LSA architecture and new directory structure

Docs: Modernize all specification documents to align with LSA-based architecture and new directory structure

Docs/Chore: Implement manual issue closure reminder and update development guide rules