Add: setting window for tauri - bugs not fixed yet

docs/TAURI_RUNTIME_TESTING.md

@@ -100,8 +100,38 @@ An issue touching Tauri runtime behaviors must satisfy all requirements before `
 6. Validate Tauri invoke/event behavior:
 - `current_state` output parsed successfully.
 - `load_active_sprite_pack` returns expected fields.
+- `settings_snapshot` returns valid persisted settings payload.
+- `list_sprite_packs` returns valid manifest-backed pack options.
+- `set_sprite_pack` changes active pack and persists.
+- `set_scale` updates scale and persists.
+- `set_visibility` updates main window visibility and persists.
+- `set_always_on_top` updates top-most behavior and persists.
 - `runtime:snapshot` event received on runtime command changes.
 - `debug_overlay_visible` and `set_debug_overlay_visible` invoke commands work and persist config.
+7. Stress runtime reload stability:
+- perform at least 10 cycles of character switch (`default` <-> `ferris`) with scale adjustments
+- no frontend runtime exception (including `TypeError`) is allowed
+- scaling behavior remains responsive after each pack switch
+8. Chroma-key quality check:
+- verify no visible magenta (`#FF00FF`) fringe remains around sprite edges in normal runtime view
+
+## Settings Window Checklist
+
+1. Open settings from tray `Settings` item.
+2. Confirm repeated tray clicks focus existing settings window instead of creating duplicates.
+3. Change character in settings and verify:
+- active pack changes immediately in main overlay
+- selection persists after restart
+4. Change scale via slider and verify:
+- runtime scale changes immediately
+- main overlay auto-fits without clipping
+- value persists after restart
+5. Toggle `Visible` and verify:
+- main overlay hide/show behavior
+- persisted value survives restart
+6. Toggle `Always on top` and verify:
+- main window z-order behavior updates
+- persisted value survives restart
 
 ## Evidence Requirements