Add log viewer for relay owners (v0.37.3)

- Add in-memory ring buffer for log storage (configurable via ORLY_LOG_BUFFER_SIZE)
- Add owner-only log viewer in web UI with infinite scroll
- Add log level selector with runtime level changes
- Add clear logs functionality
- Update Blossom refresh button to use 🔄 emoji style

Files modified:
- pkg/logbuffer/buffer.go: Ring buffer implementation
- pkg/logbuffer/writer.go: Buffered writer hook for log capture
- app/config/config.go: Add ORLY_LOG_BUFFER_SIZE env var
- app/handle-logs.go: Log API handlers
- app/server.go: Register log routes
- app/web/src/LogView.svelte: Log viewer component
- app/web/src/App.svelte: Add logs tab (owner-only)
- app/web/src/BlossomView.svelte: Update refresh button style

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

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

app/server.go

@@ -302,6 +302,10 @@ func (s *Server) UserInterface() {
 	s.mux.HandleFunc("/api/nip86", s.handleNIP86Management)
 	// ACL mode endpoint
 	s.mux.HandleFunc("/api/acl-mode", s.handleACLMode)
+	// Log viewer endpoints (owner only)
+	s.mux.HandleFunc("/api/logs", s.handleGetLogs)
+	s.mux.HandleFunc("/api/logs/clear", s.handleClearLogs)
+	s.mux.HandleFunc("/api/logs/level", s.handleLogLevel)
 
 	// Sync endpoints for distributed synchronization
 	if s.syncManager != nil {