feat(tui): keep cursor visible and allow typing during processing, block send only

tui/app.py

@@ -58,8 +58,8 @@ class HendrikTUI:
                 continue
 
             draw(self, stdscr)
-            # Sembunyikan kursor saat processing, tampilkan high visibility saat idle
-            curses.curs_set(0 if self.processing else 2)
+            # Tampilkan kursor (high visibility) agar user bisa ngetik walau processing
+            curses.curs_set(2)
             try:
                 key = stdscr.getch()
             except KeyboardInterrupt:

tui/input.py

@@ -47,12 +47,9 @@ def handle_key(app, stdscr, key):
     elif key == curses.KEY_RESIZE:
         pass
 
-    # -- Blocked during processing --
-    elif processing:
-        pass  # ignore all other keys while processing
-
     # -- Ctrl shortcuts --
     elif key == 4:                      # Ctrl+D → submit query ke LLM
+        if not processing:
             submit(app, stdscr)
     elif key == 23:                   # Ctrl+W → popup ganti workspace
         workspace_popup(app, stdscr)