chore: fix caps count for empty state + display count in sidebar. #3721

Job	Run time
Typecheck	1m 9s
Detect Changes	8s
Format (Biome)	10s
Build Desktop (aarch64-apple-darwin, macos-latest)	1m 2s
Format (Cargo)	8s
Build Desktop (x86_64-pc-windows-msvc, windows-latest)	1m 6s
Lint (Biome)	15s
Verify Tauri plugin versions	-1s
Clippy	-1s
	3m 56s

Provide feedback