fix(ui): restore original high-score windows

Replace modern overlays with the reconstructed HighScore child and DIALOG 32514 topology, exact DAT993 background, row coordinates, original strings, unpadded scores, and 21-character edit behavior. Restore OK/Cancel semantics, including Escape preserving the prefilled name and allowing an accepted empty name, with deterministic screenshot scenarios.

Test Plan:
- cargo test --all-targets
- cargo clippy --all-targets --all-features -- -D warnings
- rumdl check CHANGELOG.md RECONSTRUCTION.md README.md
- cargo run --quiet -- --simulate highscores --step 0 --screenshot /tmp/tdkpin-highscores.png
- cargo run --quiet -- --simulate name-entry --step 0 --screenshot /tmp/tdkpin-name-entry.png
- git diff --check

tdkpin-rs/README.md

@@ -44,9 +44,9 @@ cargo run -- --simulate claw-6 --at 0.15 \
 ```
 
 Use `--step N` instead of `--at SECONDS` to reproduce one exact update. The
-available scenarios are `loading`, `attract`, `autoplay`, `launcher`, `flippers`,
-`panel`, `targets`, `claw-1`, `claw-6`, `claw-7`, and `claw-18`; `--seed N` fixes
-random choices.
+available scenarios are `loading`, `attract`, `highscores`, `name-entry`,
+`autoplay`, `launcher`, `flippers`, `panel`, `targets`, `claw-1`, `claw-6`,
+`claw-7`, and `claw-18`; `--seed N` fixes random choices.
 `autoplay` charges each ball and operates the flippers from live ball position
 for long end-to-end validation runs.