refactor(animations): converge P1 motion durations to ≤300ms target

- 151 scripted + 1 manual duration fixes across 46 files
- framer entrance 0.5/0.6s -> 0.3s
- Tailwind hover -> duration-150, entrance -> duration-300
- preserve flip-clock/page-transition per semantic decision
- design-system.ts dead-code deferred
- P1 violations 156 -> 5; P0 remains 0; OK class 249 -> 400
- verified: tsc clean, eslint 0 errors
- verified: 130/130 jest suites, 1573 passed
- verified: visual regression 46/46 zero-pixel diff

Co-Authored-By: 阿睿 <workbuddy@tencent.com>

src/components/content/testimonials.tsx

@@ -50,7 +50,7 @@ export function TestimonialSection({
             <motion.div
               className="flex"
               animate={{ x: `-${activeIndex * 100}%` }}
-              transition={{ duration: 0.6, ease: EASE_OUT }}
+              transition={{ duration: 0.3, ease: EASE_OUT }}
             >
               {testimonials.map((testimonial, index) => (
                 <div key={index} className="w-full shrink-0">
@@ -94,7 +94,7 @@ export function TestimonialSection({
                 key={index}
                 onClick={() => setActiveIndex(index)}
                 className={cn(
-                  'h-2 rounded-full transition-all duration-500',
+                  'h-2 rounded-full transition-all duration-300',
                   activeIndex === index
                     ? 'w-8'
                     : 'w-2 bg-border-primary hover:bg-border-secondary'
@@ -133,7 +133,7 @@ export function LogoWall({ title, logos }: LogoWallProps) {
               initial={{ opacity: 0, y: 20 }}
               whileInView={{ opacity: 1, y: 0 }}
               viewport={{ once: true }}
-              transition={{ duration: 0.5, delay: index * 0.05, ease: EASE_OUT }}
+              transition={{ duration: 0.3, delay: index * 0.05, ease: EASE_OUT }}
               className="flex items-center justify-center p-8 bg-bg-primary hover:bg-bg-secondary transition-colors duration-300"
             >
               <div className="text-center">