fix: add type safety checks using 'data satisfies never' in various c…

…omponents

src/components/viewer.ts

@@ -309,6 +309,7 @@ export class Viewer {
                 break
             }
             default: {
+                data satisfies never
                 this.extension.logger.error(`Unknown websocket message: ${msg}`)
                 break
             }

src/providers/completion.ts

@@ -268,7 +268,7 @@ export class Completer implements vscode.CompletionItemProvider {
                 break
             default:
                 // This shouldn't be possible, so mark as error case in log.
-                this.extension.logger.error(`Error - trying to complete unknown type: ${inspectCompact(type)}`)
+                this.extension.logger.error(`Error - trying to complete unknown type: ${inspectCompact(type satisfies never)}`)
                 return []
         }
         const result = line.match(reg)

viewer/components/extensionconnection.ts

@@ -61,6 +61,7 @@ export class ExtensionConnection {
                     break
                 }
                 default: {
+                    data satisfies never
                     break
                 }
             }

viewer/components/panelmanagerconnection.ts

@@ -68,6 +68,7 @@ export class PanelManagerConnection {
                     break
                 }
                 default: {
+                    data satisfies never
                     break
                 }
             }