Improve .gitignore: add Claude Code and enhance coverage

- Add .claude/ directory (Claude Code files)
- Add *.local.json for local configuration files
- Improve database patterns (data/ directory, *.sqlite variants)
- Add OS-specific files (Windows: desktop.ini, *.lnk; Linux: .directory)
- Refine JSON patterns to avoid ignoring all JSON files
- Add reports/ and exports/ directories
- Add *.bak backup files

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -4,19 +4,26 @@
 Cargo.lock
 
 # Database
-data/*.db
-data/*.db-*
+data/
+*.db
+*.db-*
+*.sqlite
+*.sqlite3
 
 # Config
 .env
 *.local.toml
+*.local.json
 
 # Logs
 *.log
 
-# Reports
-*.json
-!config/settings.toml
+# Reports & Exports
+reports/
+exports/
+backup*.json
+rapport*.json
+*report*.json
 
 # IDE
 .vscode/
@@ -24,7 +31,17 @@ data/*.db-*
 *.swp
 *.swo
 *~
+*.bak
 
 # OS
+## macOS
 .DS_Store
+## Windows
 Thumbs.db
+desktop.ini
+*.lnk
+## Linux
+.directory
+
+# Claude Code
+.claude/