expand container monitoring functionality (#928)

- Add new /containers route with virtualized table showing all containers across systems
- Implement container stats collection (CPU, memory, network usage) with health status tracking
- Add container logs and info API endpoints with syntax highlighting using Shiki
- Create detailed container views with fullscreen logs/info dialogs and refresh functionality
- Add container table to individual system pages with lazy loading
- Implement container record storage with automatic cleanup and historical averaging
- Update navbar with container navigation icon
- Extract reusable ActiveAlerts component from home page
- Add FooterRepoLink component for consistent GitHub/version display
- Enhance filtering and search capabilities across container tables

internal/hub/ws/handlers.go

@@ -18,11 +18,11 @@ type ResponseHandler interface {
 }
 
 // BaseHandler provides a default implementation that can be embedded to make HandleLegacy optional
-// type BaseHandler struct{}
+type BaseHandler struct{}
 
-// func (h *BaseHandler) HandleLegacy(rawData []byte) error {
-// 	return errors.New("legacy format not supported")
-// }
+func (h *BaseHandler) HandleLegacy(rawData []byte) error {
+	return errors.New("legacy format not supported")
+}
 
 ////////////////////////////////////////////////////////////////////////////
 ////////////////////////////////////////////////////////////////////////////
@@ -63,6 +63,58 @@ func (ws *WsConn) RequestSystemData(ctx context.Context, data *system.CombinedDa
 ////////////////////////////////////////////////////////////////////////////
 ////////////////////////////////////////////////////////////////////////////
 
+// stringResponseHandler is a generic handler for string responses from agents
+type stringResponseHandler struct {
+	BaseHandler
+	value    string
+	errorMsg string
+}
+
+func (h *stringResponseHandler) Handle(agentResponse common.AgentResponse) error {
+	if agentResponse.String == nil {
+		return errors.New(h.errorMsg)
+	}
+	h.value = *agentResponse.String
+	return nil
+}
+
+////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////
+
+// requestContainerStringViaWS is a generic function to request container-related strings via WebSocket
+func (ws *WsConn) requestContainerStringViaWS(ctx context.Context, action common.WebSocketAction, requestData any, errorMsg string) (string, error) {
+	if !ws.IsConnected() {
+		return "", gws.ErrConnClosed
+	}
+
+	req, err := ws.requestManager.SendRequest(ctx, action, requestData)
+	if err != nil {
+		return "", err
+	}
+
+	handler := &stringResponseHandler{errorMsg: errorMsg}
+	if err := ws.handleAgentRequest(req, handler); err != nil {
+		return "", err
+	}
+
+	return handler.value, nil
+}
+
+// RequestContainerLogs requests logs for a specific container via WebSocket.
+func (ws *WsConn) RequestContainerLogs(ctx context.Context, containerID string) (string, error) {
+	return ws.requestContainerStringViaWS(ctx, common.GetContainerLogs, common.ContainerLogsRequest{ContainerID: containerID}, "no logs in response")
+}
+
+// RequestContainerInfo requests information about a specific container via WebSocket.
+func (ws *WsConn) RequestContainerInfo(ctx context.Context, containerID string) (string, error) {
+	return ws.requestContainerStringViaWS(ctx, common.GetContainerInfo, common.ContainerInfoRequest{ContainerID: containerID}, "no info in response")
+}
+
+////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////
+
 // fingerprintHandler implements ResponseHandler for fingerprint requests
 type fingerprintHandler struct {
 	result *common.FingerprintResponse

internal/hub/ws/ws_test.go

@@ -181,6 +181,17 @@ func TestCommonActions(t *testing.T) {
 	// Test that the actions we use exist and have expected values
 	assert.Equal(t, common.WebSocketAction(0), common.GetData, "GetData should be action 0")
 	assert.Equal(t, common.WebSocketAction(1), common.CheckFingerprint, "CheckFingerprint should be action 1")
+	assert.Equal(t, common.WebSocketAction(2), common.GetContainerLogs, "GetLogs should be action 2")
+}
+
+func TestLogsHandler(t *testing.T) {
+	h := &stringResponseHandler{errorMsg: "no logs in response"}
+
+	logValue := "test logs"
+	resp := common.AgentResponse{String: &logValue}
+	err := h.Handle(resp)
+	assert.NoError(t, err)
+	assert.Equal(t, logValue, h.value)
 }
 
 // TestHandler tests that we can create a Handler