feat: implement branded discord embeds and versioning

.agent/work/tickets/003-modularize-web-server.md

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+### Context & Goal
+
+The current `web/src/server.ts` is a monolithic file with a very long `fetch` handler. This makes it difficult to read and maintain. Modularizing the logic into separate route handlers and middleware-like functions will improve code quality and scalability.
+
+### Dependencies
+
+- None
+
+### Affected Files
+
+- `web/src/server.ts`: Refactor to use modular handlers.
+- `web/src/routes/api.ts`: New file for API route definitions.
+- `web/src/routes/static.ts`: New file for static file serving logic.
+- `web/src/routes/websocket.ts`: New file for WebSocket event handling.
+
+### Technical Constraints & Strategy
+
+- Implementation: Move different responsibilities (API, Static, WS) into separate files.
+- The main `serve` configuration should just call these modules.
+- Ensure the SPA fallback logic remains intact.
+
+### Definition of Done (Binary)
+
+- [ ] `web/src/server.ts` length reduced by at least 50%.
+- [ ] API routes moved to dedicated module.
+- [ ] Static file serving moved to dedicated module.
+- [ ] WebSocket logic moved to dedicated module.
+- [ ] Dashboard still loads and functions correctly.
+
+### New Test Files
+
+- None (Verification via manual testing of the dashboard).