Fix scroll-hold drift, ignore input while too small and redraw scrolls immediately

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <[email protected]>

lib/ui.py

@@ -586,6 +586,9 @@ class UIManager:
             key_seen = True
             if key == curses.KEY_RESIZE:
                 self.handle_resize()
+            elif self.too_small:
+                # Warning screen: ignore typing and scrolling, only resizes act
+                continue
             elif key == curses.KEY_PPAGE:
                 self.scroll_output(self._page_rows())
             elif key == curses.KEY_NPAGE:
@@ -625,6 +628,7 @@ class UIManager:
             return
         self._draw_output()
         self._draw_divider()
+        self._flush()
 
     # --- output ---
 
@@ -646,8 +650,17 @@ class UIManager:
             pieces.pop()
 
         new_lines = []
+        continued_delta = 0
         for piece in pieces:
             if self.line_open:
+                if not self.too_small and self.scroll_offset > 0:
+                    # The continued line can gain wrapped rows; count them so a
+                    # scrolled-back view stays still
+                    _, width = self.output_window.getmaxyx()
+                    rows_before = len(wrap_colored(self.output_lines[-1], width))
+                    self.output_lines[-1] += piece
+                    continued_delta += len(wrap_colored(self.output_lines[-1], width)) - rows_before
+                else:
                     self.output_lines[-1] += piece
                 self.line_open = False
             else:
@@ -663,6 +676,7 @@ class UIManager:
             _, width = self.output_window.getmaxyx()
             for line in new_lines:
                 self.scroll_offset += len(wrap_colored(line, width))
+            self.scroll_offset += continued_delta
 
         self._draw_output()
         self._draw_divider()