Add user-controlled animation preferences and reduce motion support

- Persist prefersReducedMotion and animationSpeedMultiplier in user
profile - Provide UI controls to toggle reduce motion and adjust
animation speed globally - Centralize animation preferences via provider
and useAnimationPreferences hook - Apply preferences to charts’
animations (duration, enabled/disabled) - Inline script in layout to
apply preferences early and avoid FOUC - Update CSS to respect user
preference with reduced motion overrides and variable animation speeds

src/server/db/schema.ts

@@ -24,6 +24,9 @@ export const users = createTable("user", (d) => ({
   image: d.varchar({ length: 255 }),
   resetToken: d.varchar({ length: 255 }),
   resetTokenExpiry: d.timestamp(),
+  // User UI/animation preferences
+  prefersReducedMotion: d.boolean().default(false).notNull(),
+  animationSpeedMultiplier: d.real().default(1).notNull(),
 }));
 
 export const usersRelations = relations(users, ({ many }) => ({