Desktop: Research feature not tested; should be generic with no special renderer

[wangtsiao]

Task

The Research (/research) feature has not been tested on the Desktop app.

Requirements

1. Desktop testing needed — End-to-end testing of the research feature on Desktop
2. Keep it generic — The research feature should NOT have a special renderer. It should use the generic chat rendering pipeline, displaying results as regular conversation content.

Expected behavior

• Research queries work end-to-end on Desktop
• Research results display via the standard chat rendering (no custom UI)

Related components

• crates/protocol/src/reference_search.rs
• crates/core/src/research/ — research module