Add Settings rows for the repeat icons

[LargeModGames]

What

Settings > Icons edits every behavior.*_icon except repeat_track_icon and repeat_context_icon. Both already load from and save to config.yml, and docs/configuration.md says every icon can be edited in Settings, so I think this is just two missing rows.

Where to look

• src/core/app/settings_schema.rs: the SettingsCategory::Icons list, the behavior.shuffle_icon item
• src/core/app/settings_apply.rs: the "behavior.shuffle_icon" arm of apply_settings_changes

Possible solution

• Copy the shuffle item and arm once per icon. They are linked only by the raw id string, so a typo silently drops the write.
• No change to user_config.rs is needed.
• Put the new arms with the plain icon arms in apply_settings_changes, not in the group guarded by the "must be exactly one terminal cell wide" check: the default glyphs are two cells wide.
• Test in the mod tests of settings_schema.rs: set app.view.settings_category = SettingsCategory::Icons, call app.load_settings_for_category(), give both rows a new SettingValue::String, call app.apply_settings_changes(), and assert both app.user_config.behavior fields changed.
• Each new #[test] raises test_attribute_total in tools/gates.count by one. If the number is off, cargo test fails in src/gates.rs and prints the right one.

Done when

• In the app, Settings (Alt-,, or Ctrl-, on macOS) > Icons shows both rows, and saving writes them to config.yml.
• cargo fmt --all -- --check, cargo clippy --no-default-features --features telemetry,tui -- -D warnings and cargo test --no-default-features --features telemetry,tui pass.

[spotatui]

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Label: enhancement
Likely area: Settings > Icons (settings schema / apply_settings_changes)

Summary

The Settings > Icons screen lets users edit almost every icon, but the repeat-track and repeat-context icons (repeat_track_icon and repeat_context_icon) have no rows there. Both already load from and save to config.yml, and the docs claim every icon is editable in Settings, so the user wants two missing rows added for consistency with the documented behavior.

Key points

• Settings > Icons edits every behavior.*_icon except repeat_track_icon and repeat_context_icon
• Both repeat icons already load from and save to config.yml
• docs/configuration.md says every icon can be edited in Settings
• Default repeat glyphs are two cells wide, so the new arms should not go under the 'exactly one terminal cell wide' guarded group
• Reporter suggests copying the shuffle item and arm once per icon and testing in settings_schema.rs mod tests

Possible duplicates: none found

_{Compared against the 29 most recently updated open issues.}