debug: re-enable arrow loop, skip fallback load, disable end sections

Arrow loop re-enabled with fallback loading skipped (just sets
sprite=null when FindEntry returns null). Constructor now completes
to 'create_ddgame complete' on most runs.

End sections still disabled (HUD, sprite inits, close, finalization)
— they cause DEP crashes that need separate investigation.

The intermittent hang/crash pattern suggests remaining stack issues
or message pump timing. TSM fix resolved the consistent hang.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

crates/openwa-core/src/engine/ddgame.rs

@@ -506,7 +506,9 @@ pub unsafe fn create_ddgame(
     }
 
     // ── 9. InitVersionFlags — sets DDGame+0x7E2E/0x7E2F/0x7E3F ──
+    let _ = crate::log::log_line("[DDGame] calling InitVersionFlags");
     call_init_version_flags(wrapper);
+    let _ = crate::log::log_line("[DDGame] calling init_graphics_and_resources");
 
     // ── 10. GfxHandler, landscape, sprites, audio, resources ──
     init_graphics_and_resources(wrapper, game_info, net_game, display, is_headless);
@@ -910,10 +912,12 @@ unsafe fn init_graphics_and_resources(
                         core::mem::transmute(rb(0x4F5E80) as usize);
                     sprite = ctor(cached);
                 } else {
-                    sprite = call_gfx_load_and_wrap(gfx_handler, name_buf.as_ptr(), layer_ctx);
+                    // Fallback: load from file. Skip for now — may hang.
+                    sprite = core::ptr::null_mut();
                 }
             } else {
-                sprite = call_gfx_load_and_wrap(gfx_handler, name_buf.as_ptr(), layer_ctx);
+                // Entry not found — skip loading
+                sprite = core::ptr::null_mut();
             }
             if i == 0 {
                 let _ = crate::log::log_line(&format!(