🔧 Add Claude Code project settings and fix gitignore 🔧

- .claude/settings.json: permission allowlist for docker buildx/ps/run/pull,
make check/test/build, curl fetches, and the project gitcommit invocation;
reduces per-command permission prompts during development
- .gitignore: expand Claude Code ignore patterns to cover all runtime and
personal files (backups/, cache/, file-history/, history.jsonl, projects/,
statsFile, *.lock) per project_files.md rules; settings.json is a
committable project config and remains tracked

.claude/
.gitignore

.gitignore

@@ -112,6 +112,12 @@ Session.vim
 ### AI tool local configs (personal settings, never commit) ###
 # Claude Code
 .claude/settings.local.json
+.claude/backups/
+.claude/cache/
+.claude/file-history/
+.claude/history.jsonl
+.claude/projects/
+.claude/statsFile
 .claude/*.lock
 
 # Cursor