Refactor web build process and update documentation

- Removed Node.js build artifacts from .gitignore and adjusted Makefile to reflect changes in web UI build process, now using server-rendered Go templates instead of React.
- Updated README to clarify the new web UI architecture and output formats, emphasizing the removal of the Node.js build step.
- Added a command to set the number of frames per render task in manager configuration, enhancing user control over rendering settings.
- Improved Gitea workflow by removing unnecessary npm install step, streamlining the CI process.

internal/manager/admin.go

@@ -121,37 +121,6 @@ func (s *Manager) handleDeleteRunnerAPIKey(w http.ResponseWriter, r *http.Reques
 	s.respondJSON(w, http.StatusOK, map[string]string{"message": "API key deleted"})
 }
 
-// handleVerifyRunner manually verifies a runner
-func (s *Manager) handleVerifyRunner(w http.ResponseWriter, r *http.Request) {
-	runnerID, err := parseID(r, "id")
-	if err != nil {
-		s.respondError(w, http.StatusBadRequest, err.Error())
-		return
-	}
-
-	// Check if runner exists
-	var exists bool
-	err = s.db.With(func(conn *sql.DB) error {
-		return conn.QueryRow("SELECT EXISTS(SELECT 1 FROM runners WHERE id = ?)", runnerID).Scan(&exists)
-	})
-	if err != nil || !exists {
-		s.respondError(w, http.StatusNotFound, "Runner not found")
-		return
-	}
-
-	// Mark runner as verified
-	err = s.db.With(func(conn *sql.DB) error {
-		_, err := conn.Exec("UPDATE runners SET verified = 1 WHERE id = ?", runnerID)
-		return err
-	})
-	if err != nil {
-		s.respondError(w, http.StatusInternalServerError, fmt.Sprintf("Failed to verify runner: %v", err))
-		return
-	}
-
-	s.respondJSON(w, http.StatusOK, map[string]string{"message": "Runner verified"})
-}
-
 // handleDeleteRunner removes a runner
 func (s *Manager) handleDeleteRunner(w http.ResponseWriter, r *http.Request) {
 	runnerID, err := parseID(r, "id")
@@ -415,6 +384,12 @@ func (s *Manager) handleSetRegistrationEnabled(w http.ResponseWriter, r *http.Re
 
 // handleSetUserAdminStatus sets a user's admin status (admin only)
 func (s *Manager) handleSetUserAdminStatus(w http.ResponseWriter, r *http.Request) {
+	currentUserID, err := getUserID(r)
+	if err != nil {
+		s.respondError(w, http.StatusUnauthorized, err.Error())
+		return
+	}
+
 	targetUserID, err := parseID(r, "id")
 	if err != nil {
 		s.respondError(w, http.StatusBadRequest, err.Error())
@@ -429,6 +404,12 @@ func (s *Manager) handleSetUserAdminStatus(w http.ResponseWriter, r *http.Reques
 		return
 	}
 
+	// Prevent admins from revoking their own admin status.
+	if targetUserID == currentUserID && !req.IsAdmin {
+		s.respondError(w, http.StatusBadRequest, "You cannot revoke your own admin status")
+		return
+	}
+
 	if err := s.auth.SetUserAdminStatus(targetUserID, req.IsAdmin); err != nil {
 		s.respondError(w, http.StatusBadRequest, err.Error())
 		return