feat(coding-agent): /reload now re-renders entire scrollback

For extension development, reloading now rebuilds the full chat history
so updated component rendering is visible immediately, not just in new
messages.

Also removes broken test for deleted chalk-logger.ts extension (npm
dependency resolution is already covered by with-deps test).

packages/coding-agent/src/modes/interactive/interactive-mode.ts

@@ -3361,6 +3361,7 @@ export class InteractiveMode {
 			if (runner) {
 				this.setupExtensionShortcuts(runner);
 			}
+			this.rebuildChatFromMessages();
 			restoreEditor();
 			this.showLoadedResources({ extensionPaths: runner?.getExtensionPaths() ?? [], force: true });
 			const modelsJsonError = this.session.modelRegistry.getError();