Improve scientific notation formatting

hdyc-svelte/src/lib/components/QuickConversionExample.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
   import { solve } from '$lib/engine';
   import type { CalculatorDef } from '$lib/data/calculators';
+  import ScientificNotationValue from '$lib/components/ScientificNotationValue.svelte';
 
   export let config: CalculatorDef;
 
@@ -17,10 +18,6 @@
     ? solve(config, 1, exampleInput.toString(), '', '')
     : null;
   $: offset = config.offset ?? 0;
-  $: formulaExpression = supportsExample
-    ? `${exampleInput} × ${config.factor}${offset ? ` + ${offset}` : ''}`
-    : '';
-
   const formatExampleValue = (value: number | null): string => {
     if (value === null || Number.isNaN(value)) {
       return '—';
@@ -50,17 +47,27 @@
   <section class="example-card">
     <h3>How to convert {config.labels.in1} to {config.labels.in2}</h3>
     <p class="example-note">
-      1 {config.labels.in1} = {config.factor}{config.offset ? ` + ${config.offset}` : ''} {config.labels.in2}
+      1 {config.labels.in1} =
+      <ScientificNotationValue value={config.factor} />
+      {config.offset ? ` + ${config.offset}` : ''} {config.labels.in2}
     </p>
     <p class="example-note">
-      1 {config.labels.in2} = {formattedReverseValue} {config.labels.in1}
+      1 {config.labels.in2} =
+      <ScientificNotationValue value={formattedReverseValue} fallback="—" />
+      {config.labels.in1}
     </p>
     <p class="example-line">
       Example: convert {exampleInput} {config.labels.in1} to {config.labels.in2}
     </p>
     <p class="example-line">
-      {formulaExpression} =
-      <span class="example-result">{result.val2} {config.labels.in2}</span>
+      {exampleInput}
+      <span class="example-operator">×</span>
+      <ScientificNotationValue value={config.factor} />
+      {config.offset ? ` + ${config.offset}` : ''}
+      =
+      <span class="example-result">
+        <ScientificNotationValue value={result.val2} fallback="—" /> {config.labels.in2}
+      </span>
     </p>
   </section>
 {/if}
@@ -93,6 +100,11 @@
     color: var(--text);
   }
 
+  .example-operator {
+    margin: 0 0.25rem;
+    font-weight: 600;
+  }
+
   .example-result {
     font-weight: 600;
     margin-left: 0.35rem;