ui: Agentic Content UX improvements (#25450)

* feat: Add shimmer text animation for processing state indicators

* feat: Redesign CollapsibleContentBlock component with improved UX

* feat: Add conditional setting display support with dependsOn field

* feat: Add showAgenticTurnStats setting for per-turn statistics

* feat: Update ChatMessageAgenticContent with improved UI and new features

* feat: Enhance file read tool UI/UX

* feat: Refine styling of collapsible content and code preview blocks

* feat: add terminal variant to CollapsibleContentBlock

* feat: add built-in tools UI registry

* feat: extract ChatMessageReasoningBlock and ChatMessageToolCallBlock

* refactor: simplify ChatMessageAgenticContent to use extracted blocks

* fix: correct markdown content block margin spacing

* fix: reorganize SettingsChatFields layout and reset button positioning

* fix: use direct map access in agentic store session methods

* refactor: remove reasoning preview/throttle system from CollapsibleContentBlock

* feat: add auto-scroll to reasoning block and remove showThoughtInProgress

* feat: add ChatMessageToolCallDateTime component and support for new tool types

* feat: improve auto-scroll reliability in reasoning block with RAF coalescing and MutationObserver

* feat: show MCP server favicon for tools without a built-in icon

* feat: add search-results parsing utilities and tests

* feat: add ChatMessageToolCallSearchResults component

* feat: integrate search results rendering into ChatMessageAgenticContent

* feat: display tool call input alongside output in ChatMessageToolCallBlock

* style: use muted foreground color in reasoning block content

* chore: Format

* feat: Refine reasoning block layout and make pending thoughts display configurable

* feat: Stream tool call code blocks with auto-scroll and handle partial JSON

* feat: add streaming permission gate infrastructure

* feat: wire permission gate into the agentic loop

* fix: bail out on abort and skip already-approved tool calls

* fix: clear partial tool calls on abort and savePartialResponse

* test: cover partial tool call cleanup end-to-end

* refactor: Remove streaming permission gate logic

* fix: Correct autoscroll and streaming gates for tool calls and reasoning blocks

* refactor: Chat Message Assistant componentization

* fix: Show health metadata for disabled MCP servers and promote connections on enable

* fix: Inherit global enabled state for missing MCP per-chat overrides

* refactor: Cleanup

* refactor: Split ChatMessageToolCallBlock into dedicated components

* feat: Add live streaming and auto-scroll for tool execution output

* feat: Add line numbers and change markers to file edit diffs

* chore: Formatting

* feat: Add type definitions and utilities for recommended MCP servers

* feat: Add recommended MCP servers configuration and storage key

* feat: Add McpServerCardCompact component for recommended servers

* feat: Add recommended servers section to Add New Server dialog

* feat: Update McpServerForm to support authorization requirements

* feat: Add select-none classes for text selection prevention

* feat: Add recommended MCP server icon assets

* refactor: Store dismissed MCP recommendations as a boolean flag

* feat: Render tool results as JSON or Markdown based on detected content type

* feat: UI improvement

* feat: Render search block early and update heading to show execution state

* fix: Prevent non-web-search tools from triggering the search UI block

* refactor: Cleanup

* refactor: Extract hardcoded icon size classes into shared constants

* refactor: Extract hardcoded tool result separator into a shared constant

* refactor: Tool Calls UI/logic

* refactor: Cleanup

* refactor: Cleanup

* refactor: Cleanup

tools/ui/src/lib/constants/settings-registry.ts

@@ -223,7 +223,7 @@ const SETTINGS_REGISTRY: Record<string, SettingsSectionEntry> = {
 				key: SETTINGS_KEYS.SHOW_MESSAGE_STATS,
 				label: 'Show message generation statistics',
 				help: 'Display generation statistics (tokens/second, token count, duration) below each assistant message.',
-				defaultValue: true,
+				defaultValue: false,
 				type: SettingsFieldType.CHECKBOX,
 				section: SETTINGS_SECTION_SLUGS.DISPLAY,
 				sync: {
@@ -231,6 +231,15 @@ const SETTINGS_REGISTRY: Record<string, SettingsSectionEntry> = {
 					paramType: SyncableParameterType.BOOLEAN
 				}
 			},
+			{
+				key: SETTINGS_KEYS.SHOW_AGENTIC_TURN_STATS,
+				label: 'Show statistics for individual agentic turns',
+				help: 'Display per-turn statistics (tokens, duration) under each turn in agentic responses. Shown only when "Show message generation statistics" is enabled.',
+				defaultValue: false,
+				type: SettingsFieldType.CHECKBOX,
+				section: SETTINGS_SECTION_SLUGS.DISPLAY,
+				dependsOn: SETTINGS_KEYS.SHOW_MESSAGE_STATS
+			},
 			{
 				key: SETTINGS_KEYS.SHOW_THOUGHT_IN_PROGRESS,
 				label: 'Show thought in progress',
@@ -789,9 +798,6 @@ export const SETTING_CONFIG_INFO: Record<string, string> = Object.fromEntries(
 /** Theme select options. */
 export const SETTINGS_COLOR_MODES_CONFIG = COLOR_MODE_OPTIONS;
 
-export type { SettingsSectionTitle } from '$lib/types';
-export type { SettingsSection } from '$lib/types';
-
 /** Sidebar sections + field configs (as consumed by UI). */
 export const SETTINGS_CHAT_SECTIONS: SettingsSection[] = [
 	...Object.values(SETTINGS_REGISTRY).map((section) => ({
@@ -804,6 +810,7 @@ export const SETTINGS_CHAT_SECTIONS: SettingsSection[] = [
 			type: s.type,
 			isExperimental: s.isExperimental,
 			isPositiveInteger: s.isPositiveInteger,
+			dependsOn: s.dependsOn,
 			help: s.help,
 			options: s.options
 		}))
@@ -832,5 +839,3 @@ export const SYNCABLE_PARAMETERS: SyncableParameter[] = getAllSettings()
 	}));
 
 export const SETTINGS_FALLBACK_EXIT_ROUTE = ROUTES.START;
-
-export { SETTINGS_KEYS } from './settings-keys';