feat(web-ui): improve Canvas streaming and subagent badge alignment #3571

Job	Run time
CLI Tests (ubuntu-latest)	4m 7s
Frontend Build	4m 14s
Rust Build Check (macos-15)	12m 32s
Rust Build Check (ubuntu-latest)	8m 12s
Rust Build Check (windows-latest)	17m 16s
	46m 21s

Navigation Menu