From ca949e15c53123dfd46f77ee83d92c5edc77fbfc Mon Sep 17 00:00:00 2001
From: Tuukka Kantola <Tuukkaa@users.noreply.github.com>
Date: Mon, 25 May 2026 13:30:27 +0200
Subject: [PATCH] fix(editor): Polish Instance AI visuals (no-changelog)
 (#30987)

---
 .../ai/instanceAi/InstanceAiThreadView.vue    | 95 ++++++++++++++++---
 .../components/AgentActivityTree.vue          |  5 +
 .../ai/instanceAi/components/AgentSection.vue |  5 +-
 .../components/AnsweredQuestions.vue          |  4 +-
 .../components/ApprovalOptionList.vue         | 43 +++++----
 .../components/ConfirmationPreview.vue        |  3 +-
 .../ai/instanceAi/components/DataSection.vue  |  6 +-
 .../ai/instanceAi/components/DelegateCard.vue |  5 +-
 .../InstanceAiConfirmationPanel.vue           | 18 ++--
 .../components/InstanceAiMessage.vue          |  3 +-
 .../instanceAi/components/ResponseGroup.vue   |  4 +-
 .../components/SubagentStepTimeline.vue       | 10 +-
 .../components/TimelineStepButton.vue         |  4 +
 .../components/TimelineStepChevron.vue        | 28 ++++++
 .../ai/instanceAi/components/ToolCallStep.vue |  5 +-
 .../instanceAi/components/ToolResultJson.vue  |  4 +-
 16 files changed, 184 insertions(+), 58 deletions(-)
 create mode 100644 packages/frontend/editor-ui/src/features/ai/instanceAi/components/TimelineStepChevron.vue

diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/InstanceAiThreadView.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/InstanceAiThreadView.vue
index b31a320101d..f5555ec89f2 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/InstanceAiThreadView.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/InstanceAiThreadView.vue
@@ -428,20 +428,52 @@ watch(
 
 // --- Floating input dynamic padding ---
 const inputContainerRef = useTemplateRef<HTMLElement>('inputContainer');
+const inputSwapRef = useTemplateRef<HTMLElement>('inputSwap');
 const inputAreaHeight = ref(120);
-let resizeObserver: ResizeObserver | null = null;
+const scrollButtonBottomOffset = ref(144);
+let inputContainerResizeObserver: ResizeObserver | null = null;
+let inputSwapResizeObserver: ResizeObserver | null = null;
+
+function updateScrollButtonBottomOffset() {
+	const container = inputContainerRef.value;
+	const inputSwap = inputSwapRef.value;
+	if (!container || !inputSwap) {
+		scrollButtonBottomOffset.value = inputAreaHeight.value + 24;
+		return;
+	}
+
+	const containerBottom = container.getBoundingClientRect().bottom;
+	const inputSwapTop = inputSwap.getBoundingClientRect().top;
+	scrollButtonBottomOffset.value = Math.max(24, containerBottom - inputSwapTop + 24);
+}
 
 watch(
 	inputContainerRef,
 	(el) => {
-		resizeObserver?.disconnect();
+		inputContainerResizeObserver?.disconnect();
 		if (el) {
-			resizeObserver = new ResizeObserver((entries) => {
+			inputContainerResizeObserver = new ResizeObserver((entries) => {
 				for (const entry of entries) {
 					inputAreaHeight.value = entry.borderBoxSize[0]?.blockSize ?? entry.contentRect.height;
 				}
+				updateScrollButtonBottomOffset();
 			});
-			resizeObserver.observe(el);
+			inputContainerResizeObserver.observe(el);
+		}
+	},
+	{ immediate: true },
+);
+
+watch(
+	inputSwapRef,
+	(el) => {
+		inputSwapResizeObserver?.disconnect();
+		if (el) {
+			inputSwapResizeObserver = new ResizeObserver(() => {
+				updateScrollButtonBottomOffset();
+			});
+			inputSwapResizeObserver.observe(el);
+			updateScrollButtonBottomOffset();
 		}
 	},
 	{ immediate: true },
@@ -483,7 +515,8 @@ onMounted(() => {
 onUnmounted(() => {
 	thread.closeSSE();
 	contentResizeObserver?.disconnect();
-	resizeObserver?.disconnect();
+	inputContainerResizeObserver?.disconnect();
+	inputSwapResizeObserver?.disconnect();
 	executionTracking.cleanup();
 });
 
@@ -645,13 +678,15 @@ function handleWorkflowFailures(report: WorkflowFailuresReport) {
 					<!-- Scroll to bottom button -->
 					<div
 						:class="$style.scrollButtonContainer"
-						:style="{ bottom: `${inputAreaHeight + 8}px` }"
+						:style="{ bottom: `${scrollButtonBottomOffset}px` }"
 					>
-						<Transition name="fade">
+						<Transition name="scroll-button-fade">
 							<N8nIconButton
 								v-if="userScrolledUp && thread.hasMessages"
 								variant="outline"
 								icon="arrow-down"
+								size="large"
+								icon-size="large"
 								:class="$style.scrollToBottomButton"
 								@click="
 									scrollToBottom(true);
@@ -677,7 +712,7 @@ function handleWorkflowFailures(report: WorkflowFailuresReport) {
 								@upgrade-click="goToUpgrade('instance-ai', 'upgrade-instance-ai')"
 								@dismiss="creditBanner.dismiss()"
 							/>
-							<div :class="$style.inputSwap">
+							<div ref="inputSwap" :class="$style.inputSwap">
 								<Transition name="input-swap">
 									<InstanceAiConfirmationPanel
 										v-if="hasFloatingConfirmation"
@@ -1002,14 +1037,34 @@ function handleWorkflowFailures(report: WorkflowFailuresReport) {
 }
 
 .scrollToBottomButton {
-	pointer-events: auto;
-	background: var(--color--background--light-2);
-	border: var(--border);
-	border-radius: var(--radius);
-	color: var(--color--text--tint-1);
+	--button--color: var(--icon-color--strong);
+	--button--color--background: var(--background--surface);
+	--button--color--background-hover: var(--color--foreground--tint-2);
+	--button--color--background-active: var(--color--foreground--tint-2);
+	--button--shadow: var(--shadow--xs);
+	--button--shadow--hover: var(--shadow--xs);
+	--button--shadow--active: var(--shadow--xs);
+	--button--border-color: var(--border-color);
+	--button--border-color--hover: var(--border-color);
+	--button--border-color--active: var(--border-color);
+	--button--border--shadow: 0 0 0 1px var(--button--border-color);
+	--button--border--shadow--hover: 0 0 0 1px var(--button--border-color--hover);
+	--button--border--shadow--active: 0 0 0 1px var(--button--border-color--active);
+	--button--radius: var(--radius--full);
 
-	&:hover {
-		background: var(--color--foreground--tint-2);
+	pointer-events: auto;
+
+	&.scrollToBottomButton {
+		background-color: var(--background--surface);
+		border: var(--border);
+		border-radius: var(--radius--full);
+		box-shadow: var(--shadow--xs);
+		color: var(--icon-color--strong);
+
+		&:hover {
+			background-color: var(--color--foreground--tint-2);
+			box-shadow: var(--shadow--xs);
+		}
 	}
 }
 
@@ -1096,6 +1151,16 @@ function handleWorkflowFailures(report: WorkflowFailuresReport) {
 	transition: opacity 0.2s ease;
 }
 
+.scroll-button-fade-enter-from,
+.scroll-button-fade-leave-to {
+	opacity: 0;
+}
+
+.scroll-button-fade-enter-active,
+.scroll-button-fade-leave-active {
+	transition: opacity 0.12s ease;
+}
+
 .preview-panel-slide-enter-active,
 .preview-panel-slide-leave-active {
 	--preview-panel-slide-easing: var(--easing--ease-in-out);
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/AgentActivityTree.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/AgentActivityTree.vue
index de7cbe11ba7..eca2ad06663 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/AgentActivityTree.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/AgentActivityTree.vue
@@ -109,6 +109,11 @@ function resolveArtifactName(artifact: ArtifactInfo): string {
 
 <style lang="scss" module>
 .reasoningTrigger {
+	--button--padding: 0;
+	--button--font-size: var(--font-size--sm);
+
+	padding-inline: 0;
+	font-size: var(--font-size--sm);
 	color: var(--color--text--tint-2);
 }
 
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/AgentSection.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/AgentSection.vue
index 3e0fc7eb24f..67fb5ceda11 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/AgentSection.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/AgentSection.vue
@@ -1,10 +1,11 @@
 <script lang="ts" setup>
 import type { InstanceAiAgentNode } from '@n8n/api-types';
-import { N8nCallout, N8nIcon } from '@n8n/design-system';
+import { N8nCallout } from '@n8n/design-system';
 import { CollapsibleRoot, CollapsibleTrigger } from 'reka-ui';
 import AnimatedCollapsibleContent from './AnimatedCollapsibleContent.vue';
 import { computed, ref, watch } from 'vue';
 import SubagentStepTimeline from './SubagentStepTimeline.vue';
+import TimelineStepChevron from './TimelineStepChevron.vue';
 import TimelineStepButton from './TimelineStepButton.vue';
 import { useSettingsStore } from '@/app/stores/settings.store';
 
@@ -51,7 +52,7 @@ watch(
 		<CollapsibleTrigger as-child>
 			<TimelineStepButton :loading="isActive" size="medium">
 				<template #icon>
-					<N8nIcon :icon="isOpen ? 'chevron-down' : 'chevron-right'" size="small" />
+					<TimelineStepChevron :open="isOpen" />
 				</template>
 				{{ sectionTitle }}
 			</TimelineStepButton>
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/AnsweredQuestions.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/AnsweredQuestions.vue
index 40fca312b52..4756529f01e 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/AnsweredQuestions.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/AnsweredQuestions.vue
@@ -69,7 +69,7 @@ function getAnswers(): DisplayAnswer[] {
 }
 
 .userBubble {
-	background: var(--color--background);
+	background: var(--assistant--color--background--user-bubble);
 	padding: var(--spacing--xs) var(--spacing--sm) var(--spacing--sm);
 	border-radius: var(--radius--xl);
 	white-space: pre-wrap;
@@ -92,7 +92,7 @@ function getAnswers(): DisplayAnswer[] {
 }
 
 .skipped {
-	color: var(--color--text--tint-2);
+	color: var(--text-color);
 	font-style: italic;
 }
 </style>
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ApprovalOptionList.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ApprovalOptionList.vue
index b55a2641fc7..bc9a20f0ca2 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ApprovalOptionList.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ApprovalOptionList.vue
@@ -61,7 +61,7 @@ function onKeydown(event: KeyboardEvent) {
 </script>
 
 <template>
-	<ConfirmationFooter layout="column">
+	<ConfirmationFooter layout="column" :class="$style.footer">
 		<div
 			ref="container"
 			:class="$style.list"
@@ -89,16 +89,16 @@ function onKeydown(event: KeyboardEvent) {
 				@click="emit('select', option.key)"
 				@mouseenter="highlightedIndex = idx"
 			>
-				<N8nIcon :class="$style.leadingIcon" :icon="option.icon" size="small" />
+				<N8nIcon :class="$style.leadingIcon" :icon="option.icon" size="large" />
 				<span :class="$style.label">
-					<span :class="option.suffix ? $style.labelStrong : undefined">{{ option.label }}</span>
+					<span :class="$style.labelStrong">{{ option.label }}</span>
 					<span v-if="option.suffix" :class="$style.labelMuted">{{ option.suffix }}</span>
 				</span>
 				<N8nIcon
 					v-if="option.withArrow !== false"
 					:class="$style.trailingIcon"
 					icon="arrow-right"
-					size="small"
+					size="large"
 				/>
 			</button>
 		</div>
@@ -112,20 +112,24 @@ function onKeydown(event: KeyboardEvent) {
 	outline: none;
 }
 
+.footer {
+	padding: 0;
+}
+
 .row {
 	display: flex;
 	align-items: center;
 	gap: var(--spacing--2xs);
 	width: 100%;
-	padding: var(--spacing--3xs) var(--spacing--2xs);
+	min-height: 36px;
+	padding: var(--spacing--3xs) var(--spacing--2xs) var(--spacing--3xs) var(--spacing--xs);
 	border: none;
 	border-radius: var(--radius--lg);
 	background: none;
 	cursor: pointer;
 	text-align: left;
 	font-size: var(--font-size--sm);
-	color: var(--color--text);
-	transition: background-color 0.15s ease;
+	color: var(--text-color);
 }
 
 // Highlight: applied when the row is the current selection (keyboard or
@@ -135,24 +139,29 @@ function onKeydown(event: KeyboardEvent) {
 	background-color: light-dark(var(--color--neutral-100), var(--color--neutral-800));
 
 	.trailingIcon {
-		opacity: 1;
+		visibility: visible;
 	}
 }
 
 // Destructive variant only changes the highlight colour, so the cost of
 // confirming becomes obvious the moment the user lands on the row.
 .rowDestructive.highlighted {
-	background-color: var(--callout--color--background--danger);
-	color: var(--callout--color--text--danger);
+	background-color: light-dark(var(--color--red-100), var(--callout--color--background--danger));
+	color: light-dark(var(--color--red-800), var(--color--red-250));
 
 	.leadingIcon {
-		color: var(--callout--color--text--danger);
+		color: light-dark(var(--color--red-800), var(--color--red-250));
+	}
+
+	.trailingIcon {
+		color: light-dark(var(--color--red-800), var(--color--red-250));
+		opacity: 0.6;
 	}
 }
 
 .leadingIcon {
 	flex-shrink: 0;
-	color: var(--color--text--tint-1);
+	color: var(--icon-color--strong);
 }
 
 .label {
@@ -165,19 +174,19 @@ function onKeydown(event: KeyboardEvent) {
 }
 
 .labelStrong {
-	font-weight: var(--font-weight--bold);
+	font-weight: var(--font-weight--medium);
 }
 
 .labelMuted {
-	color: var(--color--text--tint-1);
+	color: var(--text-color--subtle);
 	font-weight: var(--font-weight--regular);
 }
 
 .trailingIcon {
 	margin-left: auto;
-	opacity: 0;
-	color: var(--color--text--tint-1);
+	visibility: hidden;
+	color: var(--icon--color);
+	opacity: 0.7;
 	flex-shrink: 0;
-	transition: opacity 0.15s ease;
 }
 </style>
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ConfirmationPreview.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ConfirmationPreview.vue
index 0891ee350eb..ce453be22ea 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ConfirmationPreview.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ConfirmationPreview.vue
@@ -10,8 +10,7 @@
 	font-size: var(--font-size--sm);
 	color: var(--color--text);
 	word-break: break-all;
-	padding: var(--spacing--2xs);
+	padding: var(--spacing--2xs) 0;
 	border-radius: var(--radius);
-	border: var(--border);
 }
 </style>
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/DataSection.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/DataSection.vue
index b92c8a7bba4..51b3f0aee11 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/DataSection.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/DataSection.vue
@@ -9,11 +9,15 @@
 	font-size: var(--font-size--sm);
 	color: var(--color--text--tint-2);
 	background: var(--color--foreground--tint-2);
-	border-radius: var(--radius);
+	border-radius: var(--radius--xs);
 	padding: var(--spacing--2xs);
 	margin-top: var(--spacing--2xs);
 	border: var(--border);
 	max-width: 90%;
+	max-height: 200px;
+	overflow-y: auto;
+	scrollbar-width: thin;
+	scrollbar-color: light-dark(var(--color--neutral-300), var(--color--neutral-700)) transparent;
 
 	:global(pre) {
 		background: transparent;
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/DelegateCard.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/DelegateCard.vue
index bc41c1ef7e6..71245bfe9ab 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/DelegateCard.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/DelegateCard.vue
@@ -1,10 +1,11 @@
 <script lang="ts" setup>
-import { N8nBadge, N8nCard, N8nIcon, N8nText } from '@n8n/design-system';
+import { N8nBadge, N8nCard, N8nText } from '@n8n/design-system';
 import { useI18n } from '@n8n/i18n';
 import { CollapsibleRoot, CollapsibleTrigger } from 'reka-ui';
 import AnimatedCollapsibleContent from './AnimatedCollapsibleContent.vue';
 import { computed } from 'vue';
 import { useToolLabel } from '../toolLabels';
+import TimelineStepChevron from './TimelineStepChevron.vue';
 import TimelineStepButton from './TimelineStepButton.vue';
 
 const props = defineProps<{
@@ -36,7 +37,7 @@ const briefing = computed(() => {
 		<CollapsibleTrigger as-child>
 			<TimelineStepButton :loading="props.isLoading" size="medium">
 				<template #icon>
-					<N8nIcon :icon="isOpen ? 'chevron-down' : 'chevron-right'" size="small" />
+					<TimelineStepChevron :open="isOpen" />
 				</template>
 				{{ i18n.baseText('instanceAi.delegateCard.delegatingTo') }}:
 				<N8nText bold>{{ role }}</N8nText>
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/InstanceAiConfirmationPanel.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/InstanceAiConfirmationPanel.vue
index 1fde4dc0bde..78022cb485e 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/InstanceAiConfirmationPanel.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/InstanceAiConfirmationPanel.vue
@@ -168,7 +168,7 @@ function buildApprovalOptions(item: PendingConfirmationItem): ApprovalOption[] {
 	if (!destructive) {
 		options.push({
 			key: 'always-allow',
-			icon: 'check',
+			icon: 'check-check',
 			label: i18n.baseText('instanceAi.confirmation.alwaysAllow'),
 			suffix: i18n.baseText('instanceAi.confirmation.alwaysAllowSuffix'),
 			testId: 'instance-ai-panel-confirm-always-allow',
@@ -185,7 +185,6 @@ function buildApprovalOptions(item: PendingConfirmationItem): ApprovalOption[] {
 		key: 'deny',
 		icon: 'ban',
 		label: i18n.baseText('instanceAi.confirmation.deny'),
-		withArrow: false,
 		testId: 'instance-ai-panel-confirm-deny',
 	});
 	return options;
@@ -563,7 +562,7 @@ function handlePlanRequestChanges(
 						<div v-else>
 							<div :class="$style.approvalRow">
 								<div :class="$style.approvalRowBody">
-									<N8nText size="medium" bold>
+									<N8nText size="large" bold>
 										{{ buildApprovalTitle(chunk.item) }}
 									</N8nText>
 									<ConfirmationPreview>{{ buildApprovalSubtitle(chunk.item) }}</ConfirmationPreview>
@@ -589,9 +588,12 @@ function handlePlanRequestChanges(
 }
 
 .root {
-	border: var(--border);
-	border-radius: var(--radius--lg);
-	background-color: var(--color--background--light-3);
+	border: none;
+	border-radius: var(--radius--xl);
+	box-shadow:
+		var(--shadow--xs),
+		inset 0 0 0 1px light-dark(var(--color--black-alpha-100), var(--color--white-alpha-100));
+	background-color: var(--background--surface);
 }
 
 .floatingRoot {
@@ -615,12 +617,12 @@ function handlePlanRequestChanges(
 .approvalRow {
 	display: flex;
 	flex-direction: column;
-	padding: var(--spacing--4xs) 0;
+	gap: var(--spacing--2xs);
+	padding: var(--spacing--sm);
 	font-size: var(--font-size--2xs);
 }
 
 .approvalRowBody {
-	padding: var(--spacing--sm) var(--spacing--sm) 0;
 	display: flex;
 	flex-direction: column;
 	gap: var(--spacing--2xs);
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/InstanceAiMessage.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/InstanceAiMessage.vue
index be5cf5cc280..66e9b719fbc 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/InstanceAiMessage.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/InstanceAiMessage.vue
@@ -183,6 +183,7 @@ function formatJson(value: unknown): string {
 	display: flex;
 	justify-content: flex-end;
 	width: 100%;
+	margin-block: var(--spacing--md);
 }
 
 .userAttachments {
@@ -193,7 +194,7 @@ function formatJson(value: unknown): string {
 }
 
 .userBubble {
-	background: var(--color--background);
+	background: var(--assistant--color--background--user-bubble);
 	padding: var(--spacing--xs) var(--spacing--sm);
 	border-radius: var(--radius--xl);
 	white-space: pre-wrap;
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ResponseGroup.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ResponseGroup.vue
index cece32c5092..8f17a4f356f 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ResponseGroup.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ResponseGroup.vue
@@ -1,6 +1,5 @@
 <script lang="ts" setup>
 import type { InstanceAiAgentNode } from '@n8n/api-types';
-import { N8nIcon } from '@n8n/design-system';
 import { useI18n } from '@n8n/i18n';
 import { CollapsibleRoot, CollapsibleTrigger } from 'reka-ui';
 import AnimatedCollapsibleContent from './AnimatedCollapsibleContent.vue';
@@ -8,6 +7,7 @@ import { computed } from 'vue';
 import type { ResponseGroupSegment } from '../useTimelineGrouping';
 import AgentTimeline from './AgentTimeline.vue';
 import TimelineStepButton from './TimelineStepButton.vue';
+import TimelineStepChevron from './TimelineStepChevron.vue';
 
 const props = defineProps<{
 	group: ResponseGroupSegment;
@@ -89,7 +89,7 @@ const isCollapsible = computed(
 		<CollapsibleTrigger as-child>
 			<TimelineStepButton size="medium">
 				<template #icon>
-					<N8nIcon :icon="isOpen ? 'chevron-down' : 'chevron-right'" size="small" />
+					<TimelineStepChevron :open="isOpen" />
 				</template>
 				{{ summaryText }}
 			</TimelineStepButton>
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/SubagentStepTimeline.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/SubagentStepTimeline.vue
index 50aab0ad474..0b6cc7972c1 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/SubagentStepTimeline.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/SubagentStepTimeline.vue
@@ -122,7 +122,7 @@ const steps = computed((): TimelineStep[] => {
 			<template v-else-if="step.type === 'text'">
 				<CollapsibleRoot v-if="step.isLongText" v-slot="{ open }">
 					<CollapsibleTrigger as-child>
-						<N8nButton ref="triggerRef" variant="ghost" size="small">
+						<N8nButton ref="triggerRef" variant="ghost" size="small" :class="$style.toggleTrigger">
 							<template #icon>
 								<template v-if="step.isLoading">
 									<N8nIcon icon="spinner" size="small" color="primary" spin />
@@ -166,6 +166,14 @@ const steps = computed((): TimelineStep[] => {
 	overflow-y: auto;
 }
 
+.toggleTrigger {
+	--button--padding: 0;
+	--button--font-size: var(--font-size--sm);
+
+	padding-inline: 0;
+	font-size: var(--font-size--sm);
+}
+
 .streamingMarkdown {
 	display: flex;
 	flex-direction: column-reverse;
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/TimelineStepButton.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/TimelineStepButton.vue
index 48707dc4b62..022062795dd 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/TimelineStepButton.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/TimelineStepButton.vue
@@ -38,8 +38,12 @@ defineSlots<{
 	max-width: 90%;
 	justify-content: flex-start;
 	color: var(--color--text--tint-1);
+	font-size: var(--font-size--sm);
 	position: relative;
+	padding-inline: 0;
 
+	--button--padding: 0;
+	--button--font-size: var(--font-size--sm);
 	--button--color--background-active: transparent;
 	--button--color--background-hover: transparent;
 	&:hover {
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/TimelineStepChevron.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/TimelineStepChevron.vue
new file mode 100644
index 00000000000..7682b23a541
--- /dev/null
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/TimelineStepChevron.vue
@@ -0,0 +1,28 @@
+<script lang="ts" setup>
+import { N8nIcon } from '@n8n/design-system';
+
+defineProps<{
+	open: boolean;
+}>();
+</script>
+
+<template>
+	<N8nIcon icon="chevron-right" size="large" :class="[$style.chevron, open && $style.open]" />
+</template>
+
+<style lang="scss" module>
+.chevron {
+	transition: transform var(--duration--snappy) var(--easing--ease-out);
+	transform-origin: center;
+}
+
+.open {
+	transform: rotate(90deg);
+}
+
+@media (prefers-reduced-motion: reduce) {
+	.chevron {
+		transition: none;
+	}
+}
+</style>
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ToolCallStep.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ToolCallStep.vue
index 9e9a02d5667..08a81c0cbfa 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ToolCallStep.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ToolCallStep.vue
@@ -1,10 +1,11 @@
 <script lang="ts" setup>
 import type { InstanceAiToolCallState } from '@n8n/api-types';
-import { N8nCallout, N8nIcon } from '@n8n/design-system';
+import { N8nCallout } from '@n8n/design-system';
 import { CollapsibleRoot, CollapsibleTrigger } from 'reka-ui';
 import AnimatedCollapsibleContent from './AnimatedCollapsibleContent.vue';
 import { useToolLabel } from '../toolLabels';
 import DataSection from './DataSection.vue';
+import TimelineStepChevron from './TimelineStepChevron.vue';
 import TimelineStepButton from './TimelineStepButton.vue';
 import ToolResultJson from './ToolResultJson.vue';
 import ToolResultRenderer from './ToolResultRenderer.vue';
@@ -50,7 +51,7 @@ function getDisplayLabel(tc: InstanceAiToolCallState): string {
 		<CollapsibleTrigger as-child>
 			<TimelineStepButton :loading="props.toolCall.isLoading">
 				<template #icon>
-					<N8nIcon :icon="isOpen ? 'chevron-down' : 'chevron-right'" size="small" />
+					<TimelineStepChevron :open="isOpen" />
 				</template>
 				{{ props.label ?? getDisplayLabel(props.toolCall) }}
 			</TimelineStepButton>
diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ToolResultJson.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ToolResultJson.vue
index a2306d5654a..281f7be0301 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ToolResultJson.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/components/ToolResultJson.vue
@@ -100,13 +100,11 @@ function downloadFullJson() {
 <style lang="scss" module>
 .json {
 	font-family: monospace;
-	font-size: var(--font-size--sm);
+	font-size: var(--font-size--xs);
 	line-height: var(--line-height--xl);
 	white-space: pre-wrap;
 	word-break: break-word;
 	margin: 0;
-	max-height: 200px;
-	overflow-y: auto;
 	color: var(--color--text--tint-1);
 }