refactor: reduce amount of createEffect and improve imports (#284)

* refactor: update import syntax

* feat: add GalleryImage component for simplicity

* refactor: replace createEffect in GalleryNav with createMemo

* refactor: refactor Gallery component logic and improve imports

assets/ts/mobile/galleryImage.tsx

@@ -0,0 +1,69 @@
+import { onMount, type JSX } from 'solid-js'
+import invariant from 'tiny-invariant'
+
+import type { ImageJSON } from '../resources'
+import { useState } from '../state'
+import { loadGsap } from '../utils'
+
+export default function GalleryImage(props: {
+  children?: JSX.Element
+  load: boolean
+  ij: ImageJSON
+  loadingText: string
+}): JSX.Element {
+  let img: HTMLImageElement | undefined
+  let loadingDiv: HTMLDivElement | undefined
+
+  let _gsap: typeof gsap
+
+  const [state] = useState()
+
+  onMount(() => {
+    loadGsap()
+      .then((g) => {
+        _gsap = g
+      })
+      .catch((e) => {
+        console.log(e)
+      })
+    img?.addEventListener(
+      'load',
+      () => {
+        invariant(img, 'ref must be defined')
+        invariant(loadingDiv, 'loadingDiv must be defined')
+        if (state().index !== props.ij.index) {
+          _gsap.set(img, { opacity: 1 })
+          _gsap.set(loadingDiv, { opacity: 0 })
+        } else {
+          _gsap.to(img, {
+            opacity: 1,
+            delay: 0.5,
+            duration: 0.5,
+            ease: 'power3.out'
+          })
+          _gsap.to(loadingDiv, { opacity: 0, duration: 0.5, ease: 'power3.in' })
+        }
+      },
+      { once: true, passive: true }
+    )
+  })
+
+  return (
+    <>
+      <div class="slideContainer">
+        <img
+          ref={img}
+          {...(props.load && { src: props.ij.hiUrl })}
+          height={props.ij.hiImgH}
+          width={props.ij.hiImgW}
+          data-src={props.ij.hiUrl}
+          alt={props.ij.alt}
+          style={{ opacity: 0 }}
+        />
+        <div ref={loadingDiv} class="loadingText">
+          {props.loadingText}
+        </div>
+      </div>
+    </>
+  )
+}