Add memory-viewer from silicondawn

- Web UI for browsing and editing OpenClaw memory files
- Cloned from https://github.com/silicondawn/memory-viewer
- Built and running on port 8901
- Features: file tree, markdown rendering, search, live reload
- Full access to MEMORY.md, daily notes, skills, automations

memory-viewer/CONTRIBUTING.md

@@ -0,0 +1,52 @@
+# Contributing to Memory Viewer
+
+Thanks for your interest in contributing! Here's how to get started.
+
+## Development Setup
+
+1. **Prerequisites:** Node.js >= 18, npm
+2. Clone and install:
+   ```bash
+   git clone https://github.com/silicondawn/memory-viewer.git
+   cd memory-viewer
+   npm install
+   ```
+3. Start the dev server:
+   ```bash
+   npm run dev
+   ```
+   This runs both the API server and Vite dev server concurrently.
+
+## Submitting Pull Requests
+
+1. Fork the repo and create a feature branch from `master`:
+   ```bash
+   git checkout -b feat/my-feature
+   ```
+2. Make your changes and ensure they pass type checking:
+   ```bash
+   npm run typecheck
+   ```
+3. Commit with a clear message following [Conventional Commits](https://www.conventionalcommits.org/):
+   - `feat:` for new features
+   - `fix:` for bug fixes
+   - `chore:` for maintenance tasks
+   - `docs:` for documentation changes
+4. Push and open a PR against `master`.
+
+## Code Style
+
+- **TypeScript** — All new code should be written in TypeScript.
+- **React** — Functional components with hooks.
+- **Tailwind CSS v4** — Use utility classes; avoid custom CSS when possible.
+- **Formatting** — Keep lines reasonable (~100 chars). No trailing whitespace.
+- Run `npm run typecheck` before committing.
+
+## Reporting Issues
+
+- Use the [Bug Report](https://github.com/silicondawn/memory-viewer/issues/new?template=bug_report.md) or [Feature Request](https://github.com/silicondawn/memory-viewer/issues/new?template=feature_request.md) templates.
+- Include steps to reproduce, expected vs actual behavior, and your environment (OS, Node version, browser).
+
+## License
+
+By contributing, you agree that your contributions will be licensed under the [MIT License](./LICENSE).