fix(ui): restore staged loading progress

Correct raw 1000:531e's Pascal-order BitBlt to destination (202,328), height 13, and width (stage-1)*7 from original DAT994. Render stages 2 through 35 over DAT995, add deterministic loading screenshots, and update the C harness and evidence ledger for the corrected 237x13 source.

Test Plan:
- bash original/tools/test_reconstructed_c.sh
- python3 original/tools/audit_reconstruction.py --require-complete
- cargo test --all-targets
- cargo clippy --all-targets --all-features -- -D warnings
- rumdl check original/C_RECONSTRUCTION_FINAL_AUDIT.md tdkpin-rs/CHANGELOG.md tdkpin-rs/RECONSTRUCTION.md tdkpin-rs/README.md
- cargo run --quiet -- --simulate loading --at 0.55 --screenshot /tmp/tdkpin-loading-mid.png
- git diff --check

original/reconstructed/tdkpin_game_assets.c

@@ -10,9 +10,9 @@ enum {
     FRAME_PREVIOUS_BITMAP = -0x04,
     FRAME_LOADING_BITMAP = -0x02,
     FRAME_DESTINATION_DC = 0x0e,
-    LOADING_DESTINATION_X = 13,
-    LOADING_WIDTH = 328,
-    LOADING_HEIGHT = 202,
+    LOADING_DESTINATION_X = 202,
+    LOADING_DESTINATION_Y = 328,
+    LOADING_HEIGHT = 13,
     WIN16_SRCCOPY = 0x00cc0020,
     DGROUP_OVERLAY_BITMAP = 0x0867,
     WINDOW_HANDLE_OFFSET = 4,
@@ -51,12 +51,12 @@ void tdkpin_draw_loading_stage(Win16FarPtr caller_bp, uint8_t stage)
     HGDIOBJ16 previous = SelectObject16(memory_dc, loading_bitmap);
     win16_write_u16(
         frame_field(caller_bp, FRAME_PREVIOUS_BITMAP), 0, previous);
-    uint16_t wrapped_y = (uint16_t)(((uint16_t)stage - 1) * 7);
+    uint16_t wrapped_width = (uint16_t)(((uint16_t)stage - 1) * 7);
     (void)BitBlt16(
         destination,
         LOADING_DESTINATION_X,
-        (INT16)wrapped_y,
-        LOADING_WIDTH,
+        LOADING_DESTINATION_Y,
+        (INT16)wrapped_width,
         LOADING_HEIGHT,
         memory_dc,
         0,