Summary

Reverses the Agent Activity List (session transcript / observer feed) rendering order so that the newest communications appear at the top.

UX Argumentation & Rationale

• Top-of-Mind Focus: Users monitoring agent activity need to see real-time progress and tool invocations immediately without scrolling to the bottom of long transcripts.
• Consistent Operational Hierarchy: Aligns with modern operational logs, dev tools, and activity streams where current state is placed at the top.
• Preserved In-Turn Narrative: Multi-step operations within individual turn blocks (Prompt -> Tool Executions -> Results) remain top-to-bottom for natural human reading order.

Changes Made

• AgentSessionTranscriptList.tsx: Reversed display block order.
• RawEventRail.tsx: Reversed raw JSON-RPC event list.
• agentSessionTranscriptGrouping.ts: Updated deriveTranscriptBlockIds sequence for 1:1 scroll anchoring.
• agentSessionTranscriptGrouping.test.mjs: Added unit test coverage for reversed block ID order.

Verification

• Executed pnpm test in desktop/: 184 unit tests passed cleanly.