fix: stabilize portfolio scrolling and loading

Remove skeleton swaps and deferred layout estimates, restore reveal state, and use native proximity scrolling for project cards. Also make the Docker build npm registry configurable.

src/components/EducationSection.tsx

@@ -1,4 +1,4 @@
-import { ImageWithSkeleton } from './ImageWithSkeleton';
+import Image from 'next/image';
 import { getEducation } from '@/data/education';
 import { messagesByLocale, type Locale } from '@/i18n/content';
 import styles from './EducationSection.module.css';
@@ -8,7 +8,7 @@ export const EducationSection = ({ locale }: { locale: Locale }) => {
   const copy = messagesByLocale[locale].education;
 
   return (
-    <section id="education" className={styles.educationSection} data-deferred-render data-looping-motion>
+    <section id="education" className={styles.educationSection}>
       <div className="content-container">
         <div className="section-header" data-reveal="soft">
           <div className="section-title-wrap">
@@ -21,13 +21,12 @@ export const EducationSection = ({ locale }: { locale: Locale }) => {
         <div className={styles.card} data-reveal-group>
           <div className={styles.crestCol} data-reveal="image">
             <div className={styles.crestContainer}>
-              <ImageWithSkeleton
+              <Image
                 src={education.logo.src}
                 alt={education.institution}
                 fill
                 sizes="(max-width: 650px) 12rem, 16.5rem"
                 className={styles.crestImage}
-                skeletonShape="rounded"
               />
             </div>
           </div>