feat(insights): Integrate conversation details into trace AI tab

[obostjancic]

Integrate conversation details into the trace details AI tab. When AI spans have gen_ai.conversation.id, the tab shows Chat/Spans sub-tabs with the full message view filtered to the current trace. Multiple conversations render as labeled tabs. Gated behind gen-ai-conversations feature flag; without it, falls back to the existing spans-only view.

Decomposes ConversationView into composable building blocks (ConversationSplitLayout, ConversationLeftPanel, ConversationDetailPanel, useConversationSelection) shared by both the conversation detail page and trace view. Replaces the fixed two-column layout with a resizable split panel everywhere.

• closes TET-2227: Make conversation panels resizable
• closes TET-2180: Find method to convert trace to conversation

[linear-code]

TET-2217 Integrate conversation details into trace view

TET-2227 Make conversation panels resizable

TET-2180 Find method to convert trace to conversation

[sentry]

Sentry Snapshot Testing

Name	Added	Removed	Modified	Renamed	Unchanged	Status
sentry-frontend sentry-frontend	0	0	0	0	204	✅ Unchanged

[Copilot]

Pull request overview

Integrates AI conversation details into the trace details “AI” tab when gen_ai.conversation.id is present and the gen-ai-conversations feature flag is enabled, while refactoring the conversation UI into reusable, resizable split-layout building blocks shared across conversation detail pages and the trace view.

Changes:

• Renames the trace tab label from “AI Spans” to “AI” and swaps the AI tab implementation to a new TraceAiTab that conditionally renders conversations vs spans.
• Adds a conversations-aware trace AI view with Chat/Spans subtabs (including multi-conversation tabbing and a shared split-panel layout).
• Extracts shared conversation UI primitives (ConversationSplitLayout, panels, skeleton) and selection logic (useConversationSelection) for reuse.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
static/app/views/performance/newTraceDetails/useTraceLayoutTabs.tsx	Renames the tab label to “AI”.
static/app/views/performance/newTraceDetails/traceDrawer/tabs/traceAiTab.tsx	New conditional AI tab entrypoint selecting conversations vs spans.
static/app/views/performance/newTraceDetails/traceDrawer/tabs/traceAiSpans.tsx	Refactors spans view and adds a split-layout variant for embedding.
static/app/views/performance/newTraceDetails/traceDrawer/tabs/traceAiConversations.tsx	New trace AI conversations view with Chat/Spans subtabs and header.
static/app/views/performance/newTraceDetails/index.tsx	Wires trace AI tab to TraceAiTab.
static/app/views/insights/pages/conversations/hooks/useConversationSelection.tsx	New shared hook for selection/default selection logic across conversation views.
static/app/views/insights/pages/conversations/components/conversationView.tsx	Refactors to shared layout + selection hook and uses split-panel UI.
static/app/views/insights/pages/conversations/components/conversationSummary.tsx	Extracts aggregates bar for reuse in the trace AI conversations header.
static/app/views/insights/pages/conversations/components/conversationLayout.tsx	New shared resizable split layout, panels, and skeleton for conversation UIs.
static/app/views/insights/pages/agents/hooks/useAITrace.tsx	Adds gen_ai.conversation.id to fetched span attributes.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit ad17043. Configure here.}