feat: enable proxy toggle on quick deploy, event log clearing, and UX fixes

- Add enable_proxy toggle to Quick Deploy form (defaults to on)
- Add DELETE /api/events/log/{id} and DELETE /api/events/log endpoints
- Add Clear All button with confirmation on Events page
- Rename "NPM Proxy" to "Enable Proxy" on stage form (provider-agnostic)
- Fix polling interval validation (min 60s) and number input trim errors
- Fix domain field no longer required in settings

internal/api/eventlog.go

@@ -5,6 +5,8 @@ import (
 	"net/http"
 	"strconv"
 
+	"github.com/go-chi/chi/v5"
+
 	"github.com/alexei/docker-watcher/internal/store"
 )
 
@@ -46,3 +48,29 @@ func (s *Server) getEventLogStats(w http.ResponseWriter, r *http.Request) {
 
 	respondJSON(w, http.StatusOK, stats)
 }
+
+// deleteEvent handles DELETE /api/events/log/{id}.
+func (s *Server) deleteEvent(w http.ResponseWriter, r *http.Request) {
+	id, err := strconv.ParseInt(chi.URLParam(r, "id"), 10, 64)
+	if err != nil {
+		respondError(w, http.StatusBadRequest, "invalid event ID")
+		return
+	}
+	if err := s.store.DeleteEvent(id); err != nil {
+		slog.Error("failed to delete event", "id", id, "error", err)
+		respondError(w, http.StatusInternalServerError, "internal server error")
+		return
+	}
+	respondJSON(w, http.StatusOK, map[string]string{"status": "deleted"})
+}
+
+// clearEvents handles DELETE /api/events/log.
+func (s *Server) clearEvents(w http.ResponseWriter, r *http.Request) {
+	cleared, err := s.store.ClearAllEvents()
+	if err != nil {
+		slog.Error("failed to clear events", "error", err)
+		respondError(w, http.StatusInternalServerError, "internal server error")
+		return
+	}
+	respondJSON(w, http.StatusOK, map[string]any{"status": "cleared", "count": cleared})
+}