Initial scaffold: Researcher Endorsement frontend

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.github/agents/docs-automator.md

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+---
+name: "Docs Automator"
+description: "Keeps README.md and ARCHITECTURE.md in sync as components and agents are added."
+triggers:
+  - "update docs"
+  - "generate architecture"
+  - "sync README"
+---
+
+# Docs Automator
+
+Purpose
+- Automatically update or generate `README.md` and `ARCHITECTURE.md` entries when new Atomic components, stores, or agents are added so judges can easily see structure and how to demo the app.
+
+Example prompts
+- "update README with new PaperCard atom"
+- "generate ARCHITECTURE.md based on components directory"
+
+Output
+- `README.md` (development + demo steps + agent list)
+- `ARCHITECTURE.md` (Atomic Design overview + component map)
+
+Example README snippet
+```md
+# ArXiv Social App (Frontend)
+
+Lightweight React + Vite frontend demonstrating an arXiv social experience for finding endorsers and managing endorsements locally (no backend).
+
+## Agents
+- Zustand Sentry — generates persisted Zustand stores
+- Vitest Navigator — scaffolds Vitest tests
+- A11y Auditor — accessibility suggestions
+- Docs Automator — keeps docs in sync
+
+## Dev
+1. npm install
+2. npm run dev
+3. npm run test
+```
+
+Notes
+- The Docs Automator produces templates and diff-friendly updates so reviewers can see changes in PRs; it intentionally leaves final wording to the author but provides structured starting content.