Add: global factor controlling fps base interval

issues/issue6.md

@@ -10,6 +10,7 @@ P2
 
 Standardize `sprite.png` packs so each of the 7 rows maps to semantic animation groups, while
 keeping runtime compatibility with existing state names (`active`, `success`, `error`).
+Also retune 8-frame animation tempo to a slower profile for readability.
 
 ## Scope
 
@@ -42,6 +43,16 @@ One-shot defaults:
 2. All bundled sprite-pack manifests now expose row-based names and compatibility aliases.
 3. Added runtime-core unit test to confirm `SetState::Dragging` selects `"dragging"`.
 4. Updated schema/design docs to formalize the row convention.
+5. Retuned bundled pack fps profile:
+- loops: `1` fps
+- one-shot `celebrate` and `success`: `2` fps
+6. Tauri renderer-level pacing adjusted:
+- added global frame interval slowdown factor (`x2`) in Pixi ticker to further reduce perceived speed
+  without changing manifest schema type (`fps` remains integer).
+7. Added persisted tauri slowdown factor control:
+- config key: `frontend.tauri_animation_slowdown_factor` (integer, range `1..20`, default `3`)
+- new tauri commands/events to read/update factor at runtime
+- settings window slider added for live tuning and persistence.
 
 ## Verification