Fix REPL HUD layout by removing cursor positioning codes

- Remove \033[1;1H, \033[2;1H, \033[3;1H from HUD rendering
- HUD text now appears at correct positions without cursor interference
- Prompt appears at left margin as expected

engine/effects/plugins/repl.py

@@ -138,7 +138,7 @@ class ReplEffect(EffectPlugin):
         fps_str = f"FPS: {fps:.1f}" if fps > 0 else "FPS: --"
         time_str = f"{frame_time:.1f}ms" if frame_time > 0 else "--ms"
         line1 = (
-            f"\033[1;1H\033[38;5;46mMAINLINE REPL\033[0m "
+            f"\033[38;5;46mMAINLINE REPL\033[0m "
             f"\033[38;5;245m|\033[0m \033[38;5;39m{fps_str}\033[0m "
             f"\033[38;5;245m|\033[0m \033[38;5;208m{time_str}\033[0m"
         )
@@ -150,7 +150,7 @@ class ReplEffect(EffectPlugin):
             f"[{self.state.history_index + 1}/{cmd_count}]" if cmd_count > 0 else ""
         )
         line2 = (
-            f"\033[2;1H\033[38;5;45mCOMMANDS:\033[0m "
+            f"\033[38;5;45mCOMMANDS:\033[0m "
             f"\033[1;38;5;227m{cmd_count}\033[0m "
             f"\033[38;5;245m|\033[0m \033[38;5;219m{hist_idx}\033[0m"
         )
@@ -158,10 +158,7 @@ class ReplEffect(EffectPlugin):
 
         # Line 3: Output buffer count
         out_count = len(self.state.output_buffer)
-        line3 = (
-            f"\033[3;1H\033[38;5;44mOUTPUT:\033[0m "
-            f"\033[1;38;5;227m{out_count}\033[0m lines"
-        )
+        line3 = f"\033[38;5;44mOUTPUT:\033[0m \033[1;38;5;227m{out_count}\033[0m lines"
         lines.append(line3[:width])
 
         return lines