update roadmap and tasklist

ROADMAP.md

@@ -18,11 +18,11 @@
 ## Phase 3 — Polish
 
 - [x] Responsive terminal layout (adaptive sidebar, truncation, resize)
-- [ ] Channel tree navigation
-- [ ] User list with status indicators
-- [ ] Volume control
-- [ ] Server certificate handling
-- [ ] Config file hot-reload
+- [x] Channel tree navigation
+- [x] User list with status indicators
+- [x] Volume control
+- [x] Server certificate handling
+- [x] Config file hot-reload
 
 ## Phase 4 — Robustness