sessions - improve session hover title rendering and persistence

src/vs/sessions/contrib/sessions/browser/sessionsViewPane.ts

@@ -143,7 +143,7 @@ export class AgenticSessionsViewPane extends ViewPane {
 			source: 'agentSessionsViewPane',
 			filter: sessionsFilter,
 			overrideStyles: this.getLocationBasedColors().listOverrideStyles,
-			disableHover: true,
+			useSimpleHover: true,
 			getHoverPosition: () => this.getSessionHoverPosition(),
 			trackActiveEditorSession: () => true,
 			collapseOlderSections: () => true,

src/vs/workbench/contrib/chat/browser/agentSessions/agentSessionsControl.ts

@@ -40,7 +40,7 @@ export interface IAgentSessionsControlOptions extends IAgentSessionsSorterOption
 	readonly overrideStyles: IStyleOverride<IListStyles>;
 	readonly filter: IAgentSessionsFilter;
 	readonly source: string;
-	readonly disableHover?: boolean;
+	readonly useSimpleHover?: boolean;
 
 	getHoverPosition(): HoverPosition;
 	trackActiveEditorSession(): boolean;

src/vs/workbench/contrib/chat/browser/agentSessions/agentSessionsViewer.ts

@@ -76,7 +76,7 @@ interface IAgentSessionItemTemplate {
 }
 
 export interface IAgentSessionRendererOptions {
-	readonly disableHover?: boolean;
+	readonly useSimpleHover?: boolean;
 	getHoverPosition(): HoverPosition;
 }
 
@@ -363,7 +363,9 @@ export class AgentSessionRenderer extends Disposable implements ICompressibleTre
 	}
 
 	private renderHover(session: ITreeNode<IAgentSession, FuzzyScore>, template: IAgentSessionItemTemplate): void {
-		if (this.options.disableHover) {
+		if (this.options.useSimpleHover) {
+			const title = renderAsPlaintext(new MarkdownString(session.element.label));
+			template.elementDisposable.add(this.hoverService.setupDelayedHover(template.element, { content: title, position: { hoverPosition: this.options.getHoverPosition() } }, { groupId: 'agent.sessions' }));
 			return;
 		}