Refactor Claude Code settings to use template pattern

- Create .claude/settings.json as project-wide template
- Untrack .claude/settings.local.json for local overrides
- Add .claude/settings.local.json to .gitignore
- Add .claude/README.md documenting the setup

This allows:
- Project defaults versioned in git
- Local customization without conflicts
- Clean separation of shared vs personal settings

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.claude/README.md

@@ -0,0 +1,21 @@
+# Claude Code Settings
+
+This directory contains configuration for Claude Code.
+
+## Files
+
+- **settings.json**: Project-wide default settings (tracked in git)
+- **settings.local.json**: Local user-specific overrides (not tracked in git)
+
+## Usage
+
+The `settings.json` file contains the default configuration that applies to all developers/devices. If you need to customize settings for your local environment, create a `settings.local.json` file which will override the defaults.
+
+### Example: Create local overrides
+
+```bash
+cp .claude/settings.json .claude/settings.local.json
+# Edit settings.local.json with your preferences
+```
+
+Your local changes will not be committed to git.

.claude/settings.json

@@ -4,5 +4,6 @@
       "Bash(python3:*)"
     ],
     "deny": []
-  }
-}
+  },
+  "enableAllProjectMcpServers": false
+}

.gitignore

@@ -16,4 +16,7 @@ NPM/data/*.json
 sqlite/*.db
 sqlite/*.sql
 
-tests/
+tests/
+
+# Claude Code local settings
+.claude/settings.local.json