Add a setting to display message generation statistics (#16901)

* feat: Add setting to display message generation statistics

* chore: build static webui output

tools/server/webui/src/lib/constants/settings-config.ts

@@ -8,6 +8,7 @@ export const SETTING_CONFIG_DEFAULT: Record<string, string | number | boolean> =
 	showThoughtInProgress: false,
 	disableReasoningFormat: false,
 	keepStatsVisible: false,
+	showMessageStats: true,
 	askForTitleConfirmation: false,
 	pasteLongTextToFileLen: 2500,
 	pdfAsImage: false,
@@ -82,6 +83,8 @@ export const SETTING_CONFIG_INFO: Record<string, string> = {
 	disableReasoningFormat:
 		'Show raw LLM output without backend parsing and frontend Markdown rendering to inspect streaming across different models.',
 	keepStatsVisible: 'Keep processing statistics visible after generation finishes.',
+	showMessageStats:
+		'Display generation statistics (tokens/second, token count, duration) below each assistant message.',
 	askForTitleConfirmation:
 		'Ask for confirmation before automatically changing conversation title when editing the first message.',
 	pdfAsImage: 'Parse PDF as image instead of text (requires vision-capable model).',